TELEFONICA S A (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 0001000 - Document - Document and Entity Information Network

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 http://www.telefonica.com/role/DocumentAndEntityInformation
2 Implied Table Table

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3 Document And Entity Information [Abstract] Abstract tef:DocumentAndEntityInformationAbstract
4 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
5 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
6 Document Type Concept (Submission Type) For Period dei:DocumentType
7 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
8 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
9 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
10 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
11 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
12 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
13 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
14 Entity Well Known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
15 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
16 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
17 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
18 1001000 - Statement - Consolidated Statements of Financial Position Network

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 http://www.telefonica.com/role/ConsolidatedStatementsOfFinancialPosition
19 Implied Table Table

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20 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
21 ASSETS Abstract ifrs-full:AssetsAbstract
22 NON-CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
23 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
24 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
25 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
26 Investments accounted for by the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
27 Financial assets and other non-current assets Concept (Monetary) As Of Debit tef:NonCurrentFinancialAssetsAndOtherNonCurrentAssets
28 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
29 CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
30 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
31 Receivables and other current assets Concept (Monetary) As Of Debit tef:CurrentReceivablesAndOtherCurrentAssets
32 Tax receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
33 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
34 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
35 Non-current assets classified as held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
36 Total allocated assets Concept (Monetary) As Of Debit ifrs-full:Assets
37 EQUITY AND LIABILITIES Abstract ifrs-full:EquityAndLiabilitiesAbstract
38 EQUITY Concept (Monetary) As Of Credit ifrs-full:Equity
39 Equity attributable to equity holders of the parent and other holders of equity instruments Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
40 Equity attributable to non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
41 NON-CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
42 Non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
43 Payables and other non-current liabilities Concept (Monetary) As Of Credit tef:NoncurrentPayablesAndOtherNoncurrentLiabilities
44 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
45 Non-current provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
46 CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
47 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
48 Payables and other-current liabilities Concept (Monetary) As Of Credit tef:CurrentPayablesAndOtherCurrentLiabilities
49 Current tax payables Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
50 Current provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
51 Liabilities associated with non-current assets classified as held for sale Concept (Monetary) As Of Credit ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
52 TOTAL EQUITY AND LIABILITIES Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
53 1002000 - Statement - Consolidated Income Statements Network

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 http://www.telefonica.com/role/ConsolidatedIncomeStatements
54 Implied Table Table

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55 Profit or loss [abstract] Abstract ifrs-full:IncomeStatementAbstract
56 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
57 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
58 Supplies Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
59 Personnel expenses Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
60 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
61 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
62 OPERATING INCOME Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
63 Share of income (loss) of investments accounted for by the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
64 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
65 Exchange gains Concept (Monetary) For Period Credit ifrs-full:NetForeignExchangeGain
66 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
67 Exchange losses Concept (Monetary) For Period Debit ifrs-full:NetForeignExchangeLoss
68 Net financial expense Concept (Monetary) For Period Debit tef:NetFinancialExpense
69 PROFIT BEFORE TAX Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
70 Corporate income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
71 PROFIT FOR THE YEAR Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
72 Attributable to equity holders of the Parent Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
73 Attributable to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
74 Basic and diluted earnings per share attributable to equity holders of the parent (EUR per share) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
75 1003000 - Statement - Consolidated Statements of Comprehensive Income Network

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 http://www.telefonica.com/role/ConsolidatedStatementsOfComprehensiveIncome
76 Implied Table Table

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77 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
78 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
79 Other comprehensive (loss) income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
80 Gains (losses) from financial assets measured at Fair value through other comprehensive income Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
81 Income tax impact Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
82 Reclassification of (gains) losses included in the income statement (Note 17) Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsBeforeTax
83 Income tax impact Concept (Monetary) For Period Debit tef:IncomeTaxRelatingToReclassificationAdjustmentsOnAvailableForSaleFinancialAssets
84 Other comprehensive income (loss), available-for-sale investments, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
85 Gains (losses) on hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
86 Income tax impact Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
87 Reclassification of (gains) losses included in the income statement (Note 17) Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax
88 Income tax impact Concept (Monetary) For Period Debit tef:IncomeTaxRelatingtoReclassificationofGainsLossesonCashFlowHedges
89 Other comprehensive income, hedges, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
90 Gains (losses) on hedges costs Concept (Monetary) For Period Credit tef:Gainslossesoncashflowhedgescostsbeforetax
91 Income tax impact Concept (Monetary) For Period Debit tef:Incometaxrelatingtocashflowhedgescostsincludedinothercomprehensiveincome
92 Reclassification of (gains) losses included in the income statement (Note 17) Concept (Monetary) For Period Debit tef:Reclassificationadjustmentsoncashflowhedgescostsbeforetax
93 Income tax impact Concept (Monetary) For Period Debit tef:IncomeTaxRelatingtoReclassificationofGainsLossesonCashFlowHedgesCosts
94 Other comprehensive income, hedges costs, net of tax Concept (Monetary) For Period Credit tef:Othercomprehensiveincomenetoftaxcashflowhedgescosts
95 Share of (losses) gains recognized directly in equity of associates and others Concept (Monetary) For Period Debit tef:ShareOfGainsLossesRecognizedDirectlyInEquityOfAssociatesAndOthers
96 Income tax impact Concept (Monetary) For Period Debit tef:IncomeTaxRelatingToShareOfGainsLossesRecognizedDirectlyInEquityOfAssociatesAndOthers
97 Reclassification of (gains) losses included in the income statement Concept (Monetary) For Period Debit tef:ReclassificationRelatingToShareOfGainsLossesRecognizedDirectlyInEquityOfAssociatesAndOthers
98 Income tax impact Concept (Monetary) For Period Debit tef:IncomeTaxRelatingToReclassificationOfShareOfGainsLossesRecognizedDirectlyInEquityOfAssociatesAndOthers
99 Other comprehensive income, share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
100 Translation differences (Note 15) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
101 Total other comprehensive (loss) income recognized for the year (Items that may be reclassified subsequently to profit or loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
102 Actuarial gains (losses) and impact of limit on assets for defined benefit pension plans Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
103 Income tax impact Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
104 Actuarial gains (losses) and impact of limit on assets for defined benefit pension plans, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
105 (Losses) gains from financial assets measured at fair value through comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRevaluation
106 Income tax impact Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToChangesInRevaluationSurplusOfOtherComprehensiveIncome
107 (Losses) gains from financial assets measured at fair value through comprehensive income, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluation
108 Total other comprehensive income (loss) recognized for the year (Items that will not be reclassified subsequently to profit or loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
109 Total comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
110 Attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
111 Equity holders of the parent and other holders of equity instruments Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
112 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
113 1004000 - Statement - Consolidated Statements of Changes in Equity Network

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 http://www.telefonica.com/role/ConsolidatedStatementsOfChangesInEquity
114 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
115 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
116 Equity [member] Member ifrs-full:EquityMember
117 Total Member ifrs-full:EquityAttributableToOwnersOfParentMember
118 Share capital Member ifrs-full:IssuedCapitalMember
119 Share premium Member ifrs-full:SharePremiumMember
120 Treasury Shares Member ifrs-full:TreasurySharesMember
121 Other equity instruments Member ifrs-full:OtherEquityInterestMember
122 Legal reserve Member ifrs-full:StatutoryReserveMember
123 Retained earnings Member ifrs-full:RetainedEarningsMember
124 Fair value financial assets Member ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
125 Hedges Member ifrs-full:ReserveOfCashFlowHedgesMember
126 Equity of associates and others Member ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember
127 Translation differences Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
128 Non-controlling interests Member ifrs-full:NoncontrollingInterestsMember
129 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
130 Financial position, beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
131 Adjustment on initial application of new reporting (Note 15) Concept (Monetary) As Of Credit tef:GrossAdjustmentonInitialApplicationofNewReporting
132 Accounting change impact and initial impact of hyperinflation Concept (Monetary) As Of Credit tef:AccountingChangeImpactandInitialImpactofHyperinflation
133 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
134 Other comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
135 Total comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
136 Dividends and distribution of profit (Note 15) Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
137 Net movement in treasury shares Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions
138 Acquisitions and disposals of non-controlling interests and business combinations (Note 5) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
139 Capital reduction (Note 15) Concept (Monetary) For Period Debit ifrs-full:ReductionOfIssuedCapital
140 Undated deeply subordinated securities and notes mandatorily convertible (Note 15) Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughUndatedDeeplySubordinatedSecurities
141 Translation effect of financial statements in hyperinflation economies Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughChangeInTranslationDifferencesEquity
142 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
143 Financial position, ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
144 1005000 - Statement - Consolidated Statements of Cash Flows Network

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 http://www.telefonica.com/role/ConsolidatedStatementsOfCashFlows
145 Implied Table Table

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146 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
147 Cash received from operations Concept (Monetary) For Period Debit tef:ReceiptsFromOperations
148 Cash paid from operations Concept (Monetary) For Period Credit tef:PaymentsForOperations
149 Net payments of interest and other financial expenses net of dividends received Concept (Monetary) For Period Credit tef:PaymentsOfInterestAndOtherFinancialExpensesNetOfDividendsReceived
150 Taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
151 Net cash flow provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
152 (Payments on investments)/proceeds from the sale in property, plant and equipment and intangible assets, net Concept (Monetary) For Period Debit tef:ProceedsFromPurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsClassifiedAsInvestingActivitiesNet
153 Proceeds on disposals of companies, net of cash and cash equivalents disposed Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
154 Payments on investments in companies, net of cash and cash equivalents acquired Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
155 Proceeds on financial investments not included under cash equivalents Concept (Monetary) For Period Debit tef:ProceedsFromFinancialInvestmentsNotIncludedUnderCashEquivalents
156 Payments on financial investments not included under cash equivalents Concept (Monetary) For Period Credit tef:PaymentsForFinancialInvestmentsNotIncludedUnderCashEquivalents
157 (Payments)/proceeds on placements of cash surpluses not included under cash equivalents Concept (Monetary) For Period Debit tef:ProceedsFromPaymentsForPlacementsOfCashSurplusesNotIncludedUnderCashEquivalents
158 Government grants received Concept (Monetary) For Period Debit ifrs-full:ProceedsFromGovernmentGrantsClassifiedAsInvestingActivities
159 Net cash flow used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
160 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
161 Proceeds from share capital increase Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
162 Proceeds/(payments) of treasury shares and other operations with shareholders and with minority interests Concept (Monetary) For Period Debit tef:ProceedsFromPaymentsForTreasurySharesAndOtherShareholderOperations
163 Operations with other equity holders Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingOtherEquityInstruments
164 Proceeds on issue of debentures and bonds and other debts Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures
165 Proceeds on loans, borrowings and promissory notes Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
166 Repayments of debentures and bonds and other debts Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBondsNotesAndDebentures
167 Repayments of loans, borrowings and promissory notes Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
168 Financed operating payments and investments in property, plant and equipment and intangible assets payments Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
169 Net cash used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
170 Effect of changes in exchange rates Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
171 Cash reclassified to assets held for sale Concept (Monetary) For Period Credit tef:CashReclassifiedtoAssetsHeldforSale
172 Effect of changes in consolidation methods and others Concept (Monetary) For Period Debit tef:EffectOfChangesInConsolidationMethodsAndOthersOnCashAndCashEquivalents
173 Net increase (decrease) in cash and cash equivalents during the year Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
174 RECONCILIATION OF CASH AND CASH EQUIVALENTS WITH THE STATEMENTS OF FINANCIAL POSITION Abstract tef:ReconciliationOfCashAndCashEquivalentsWithTheStatementOfFinancialPositionAbstract
175 CASH AND CASH EQUIVALENTS AT JANUARY 1 Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
176 CASH AND CASH EQUIVALENTS AT DECEMBER 31 Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
177 Cash on hand and at banks Concept (Monetary) As Of Debit ifrs-full:Cash
178 Other cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashEquivalents
179 2101100 - Disclosure - Background and General Information Network

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 http://www.telefonica.com/role/BackgroundAndGeneralInformation
180 Implied Table Table

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181 General Information About Financial Statements [Abstract] Abstract tef:GeneralInformationAboutFinancialStatementsAbstract
182 Background and General Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
183 2102100 - Disclosure - Basis of Presentation of the Consolidated Financial Statements Network

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184 Implied Table Table

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185 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract tef:CorporateInformationAndStatementOfIFRSComplianceAbstract
186 Basis of Presentation of the Consolidated Financial Statements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
187 2103100 - Disclosure - Accounting Policies Network

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 http://www.telefonica.com/role/AccountingPolicies
188 Implied Table Table

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189 Disclosure Of Significant Accounting Policies [Abstract] Abstract tef:DisclosureOfSignificantAccountingPoliciesAbstract
190 Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
191 2104100 - Disclosure - Segment Information Network

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192 Implied Table Table

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193 Operating Segments [Abstract] Abstract tef:OperatingSegmentsAbstract
194 Segment Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
195 2105100 - Disclosure - Business Combinations and Acquisitions of Non-Controlling Interests Network

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 http://www.telefonica.com/role/BusinessCombinationsAndAcquisitionsOfNonControllingInterests
196 Implied Table Table

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197 Business Combinations and Acquisitions of Non-Controlling Interests [Abstract] Abstract tef:BusinessCombinationsandAcquisitionsofNonControllingInterestsAbstract
198 Business Combinations and Acquisitions of Non-Controlling Interests Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBusinessCombinationsExplanatory
199 2106100 - Disclosure - Intangible Assets Network

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 http://www.telefonica.com/role/IntangibleAssets
200 Implied Table Table

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201 Intangible Assets [Abstract] Abstract tef:IntangibleAssetsAbstract
202 Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
203 2107100 - Disclosure - Goodwill Network

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204 Implied Table Table

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205 Intangible Assets [Abstract] Abstract tef:IntangibleAssetsAbstract
206 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
207 2108100 - Disclosure - Property, Plant and Equipment Network

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 http://www.telefonica.com/role/PropertyPlantAndEquipment
208 Implied Table Table

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209 Property, plant and equipment [abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
210 Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
211 2109100 - Disclosure - Associates and Joint Ventures Network

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 http://www.telefonica.com/role/AssociatesAndJointVentures
212 Implied Table Table

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213 Interests In Other Entities [Abstract] Abstract tef:InterestsInOtherEntitiesAbstract
214 Associates and Joint Ventures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfJointVenturesExplanatory
215 2110100 - Disclosure - Related Parties Network

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 http://www.telefonica.com/role/RelatedParties
216 Implied Table Table

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217 Related Party [Abstract] Abstract tef:RelatedPartyAbstract
218 Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
219 2111100 - Disclosure - Financial Assets and Other Non-current Assets Network

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220 Implied Table Table

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221 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
222 Financial Assets and Other Non-current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
223 2112100 - Disclosure - Receivables and Other Current Assets Network

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 http://www.telefonica.com/role/ReceivablesAndOtherCurrentAssets
224 Implied Table Table

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225 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
226 Receivables and Other Current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
227 2113100 - Disclosure - Other Current Financial Assets Network

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 http://www.telefonica.com/role/OtherCurrentFinancialAssets
228 Implied Table Table

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229 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
230 Other Current Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
231 2114100 - Disclosure - Breakdown of Financial Assets Network

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232 Implied Table Table

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233 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
234 Breakdown of Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
235 2115100 - Disclosure - Equity Network

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 http://www.telefonica.com/role/Equity
236 Implied Table Table

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237 Share Capital, Reserves And Other Equity Interest [Abstract] Abstract tef:ShareCapitalReservesAndOtherEquityInterestAbstract
238 Equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
239 2117100 - Disclosure - Derivative Financial Instruments and Risk Management Policies Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPolicies
240 Implied Table Table

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241 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
242 Derivative Financial Instruments and Risk Management Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
243 2117100 - Disclosure - Financial Liabilities Network

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 http://www.telefonica.com/role/FinancialLiabilities
244 Implied Table Table

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245 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
246 Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
247 2121100 - Disclosure - Payables and Other Non-current Liabilities Network

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 http://www.telefonica.com/role/PayablesAndOtherNonCurrentLiabilities
248 Implied Table Table

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249 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
250 Payables and Other Non-current Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
251 2122100 - Disclosure - Payables and Other Current Liabilities Network

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252 Implied Table Table

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253 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
254 Payables and other current liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentLiabilitiesExplanatory
255 2123100 - Disclosure - Breakdown of Contractual Assets and Liabilities, and Capitalized Costs Network

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259 2124100 - Disclosure - Provisions Network

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262 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
263 2125100 - Disclosure - Income Tax Matters Network

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266 Income Tax Matters Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
267 2126100 - Disclosure - Revenue and Expenses Network

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271 Revenues and Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesExplanatory
272 2127100 - Disclosure - Share-Based Payment Plans Network

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276 2128100 - Disclosure - Cash Flow Analysis Network

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280 2129100 - Disclosure - Other Information Network

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283 Other Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAdditionalInformationExplanatory
284 2130100 - Disclosure - Finance Leases Network

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288 2131100 - Disclosure - Operations Classified as Held for Sale Network

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292 2132100 - Disclosure - Events After the Reporting Period Network

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296 2133100 - Disclosure - Appendix I: Scope of Consolidation Network

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300 2134100 - Disclosure - Appendix II: Board and Senior Management Compensation Network

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304 2135100 - Disclosure - Appendix III: Debentures and Bonds Network

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308 2136100 - Disclosure - Appendix IV: Financial Instruments Network

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312 2137100 - Disclosure - Appendix V: Interest-Bearing Debt Network

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316 2167100 - Disclosure - Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group Network

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320 2168100 - Disclosure - Annex 1 Network

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328 2203201 - Disclosure - Accounting Policies (Policies) Network

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335 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
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337 Lease agreements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
338 Investment in associates and joint arrangements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory
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341 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
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343 Revenue Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
344 Expenses Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForExpensesExplanatory
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351 Schedule of Effect of Changes in Foreign Exchange Rates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
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355 Schedule of Estimated Useful Life of Depreciable Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
356 2304301 - Disclosure - Segment Information (Tables) Network

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360 Schedule of Composition of Segment Revenues, Detailed by the Main Countries of Operation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
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365 2306301 - Disclosure - Intangible Assets (Tables) Network

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369 Schedule of Gross Cost, Accumulated Amortization and Impairment Losses of Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
370 2307301 - Disclosure - Goodwill (Tables) Network

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374 Schedule of Allocation of Goodwill to the Different Cash-Generating Units (CGUs) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
375 Schedule of Sensitivity to Changes in Assumptions Concept (Text Block (HTML)) For Period tef:DisclosureOfAssumptionsUsedInSensitivityAnalysisOfGoodwillImpairmentTableTextBlock
376 2308301 - Disclosure - Property, Plant and Equipment (Tables) Network

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384 Schedule of Interests in Associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInAssociatesExplanatory
385 2310301 - Disclosure - Related Parties (Tables) Network

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389 2311301 - Disclosure - Financial Assets and Other Non-current Assets (Tables) Network

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393 Schedule of Composition of Long-Term Credits Concept (Text Block (HTML)) For Period tef:DisclosureOfCompositionOfNoncurrentCreditsTableTextBlock
394 2312301 - Disclosure - Receivables and Other Current Assets (Tables) Network

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398 Schedule of Impairment of Trade Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
399 Schedule of Accounts Receivable Balances Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
400 2314301 - Disclosure - Breakdown of Financial Assets (Tables) Network

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404 Schedule of Impact of Adoption of New IFRS Guidance Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
405 2315301 - Disclosure - Equity (Tables) Network

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409 Schedule of Subordinated Securities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSubordinatedLiabilitiesExplanatory
410 Schedule of Breakdown of Accumulated Contribution of Translation Differences Concept (Text Block (HTML)) For Period tef:DisclosureOfTranslationDifferencesTableTextBlock
411 Schedule of Impact of Adoption of New IFRS Guidance Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
412 Schedule of Treasury Share Instruments Concept (Text Block (HTML)) For Period tef:TreasuryShareInstrumentsTableTextBlock
413 Schedule of Equity Attributable to Non-Controlling Interests Concept (Text Block (HTML)) For Period tef:DisclosureOfEquityAttributableToNoncontrollingInterestTableTextBlock
414 Schedule of Condensed Financial Statements of Non-controlling Interests Concept (Text Block (HTML)) For Period srt:ScheduleOfCondensedFinancialStatementsTableTextBlock
415 Schedule of Subsidiary Cash Flows Concept (Text Block (HTML)) For Period tef:DisclosureofSubsidiariesCashFlowTableTextBlock
416 2317301 - Disclosure - Derivative Financial Instruments and Risk Management Policies (Tables) Network

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420 Schedule of Financial Results Concept (Text Block (HTML)) For Period tef:DisclosureOfFinancialResultsTableTextBlock
421 Schedule of Derivatives, Fair Value, and Expected Maturity Concept (Text Block (HTML)) For Period tef:DisclosureOfFairValueOfDerivativeInstrumentsAndExpectedMaturityTableTextBlock
422 2317301 - Disclosure - Financial Liabilities (Tables) Network

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427 Schedule of Reconciliation of Changes in Financial Liabilities Concept (Text Block (HTML)) For Period tef:DisclosureOfReconciliationOfChangesInFinancialLiabilitiesTableTextBlock
428 Schedule of Interest-Bearing Debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
429 Schedule of Loans and Advances to Customers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLoansAndAdvancesToCustomersExplanatory
430 2321301 - Disclosure - Payables and Other Non-current Liabilities (Tables) Network

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434 2322301 - Disclosure - Payables and Other Current Liabilities (Tables) Network

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438 Disclosure Of Current Other Payables Concept (Text Block (HTML)) For Period tef:DisclosureOfCurrentOtherPayablesTableTextBlock
439 Disclosure Of Average Payment Period To Suppliers Concept (Text Block (HTML)) For Period tef:DisclosureOfAveragePaymentPeriodToSuppliersTableTextBlock
440 2323301 - Disclosure - Breakdown of Contractual Assets and Liabilities, and Capitalized Costs (Tables) Network

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445 Maturity schedule of contractual liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionPriceAllocatedToRemainingPerformanceObligationsExplanatory
446 2324301 - Disclosure - Provisions (Tables) Network

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454 Schedule of Main Actuarial Assumptions Used in Valuing Plans Concept (Text Block (HTML)) For Period tef:ActuarialAssumptionsUsedInValuingDefinedBenefitPlansTableTextBlock
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463 Schedule of Tax Payables and Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTaxReceivablesAndPayablesExplanatory
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470 Schedule of Breakdown of Other Expenses Concept (Text Block (HTML)) For Period tef:DisclosureOfTheCompositionOfOtherExpenseTableTextBlock
471 Schedule of Estimated Payments on Operating Leases, Purchases, and Other Contractual Commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
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474 Schedule of Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
475 2327301 - Disclosure - Share-Based Payment Plans (Tables) Network

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492 Schedule of Key Management Personnel Compensation Concept (Text Block (HTML)) For Period tef:DisclosureOfKeyManagementPersonnelCompensationTableTextBlock
493 2330301 - Disclosure - Finance Leases (Tables) Network

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497 Schedule of Finance Leases by Lessor Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory
498 2331301 - Disclosure - Operations Classified as Held for Sale (Tables) Network

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502 2333301 - Disclosure - Appendix I: Scope of Consolidation (Tables) Network

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506 2334301 - Disclosure - Appendix II: Board and Senior Management Compensation (Tables) Network

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510 Schedule of Long-term Savings Systems of Key Management Personnel Compensation Concept (Text Block (HTML)) For Period tef:DisclosureOfLongTermSavingsSystemsOfKeyManagementPersonnelCompensationTableTextBlock
511 Schedule of Life Insurance Premiums of Key Management Personnel Compensation Concept (Text Block (HTML)) For Period tef:DisclosureOfLifeInsurancePremiumsOfKeyManagementPersonnelCompensationTableTextBlock
512 Schedule of PSP of Key Management Personnel Compensation Concept (Text Block (HTML)) For Period tef:DisclosureOfPerformanceAndInvestmentPlanKeyManagementPersonnelCompensationTableTextBlock
513 2335301 - Disclosure - Appendix III: Debentures and Bonds (Tables) Network

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517 Schedule of Detailed Information about Debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
518 2336301 - Disclosure - Appendix IV: Financial Instruments (Tables) Network

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522 Schedule of Maturity Analysis for Derivative Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForDerivativeFinancialLiabilities
523 2337301 - Disclosure - Appendix V: Interest-Bearing Debt (Tables) Network

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527 2367301 - Disclosure - Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group (Tables) Network

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531 Schedule of Detailed Information about Service Concession Arrangements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutServiceConcessionArrangementsExplanatory
532 2402402 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Impacts of Adopting IFRS 15 (Details) Network

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542 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
543 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
544 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
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553 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
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578 PROFIT BEFORE TAX Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
579 Corporate income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
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584 2402403 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Impact of Adopting IFRS 9 (Details) Network

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588 2402404 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Translation of Telefonica Venezolana's Financial Statements (Details) Network

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600 Translation exchange rate Concept (Decimal) As Of tef:Translationexchangerate
601 Inflation rate (as a percent) Concept (Percent) For Period tef:InflationRate
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603 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
604 Operating income before depreciation and amortization (OIBDA) Concept (Monetary) For Period Credit tef:ProfitLossFromOperatingActivitiesBeforeDepreciationAndAmortizationExpense
605 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
606 Financial result Concept (Monetary) For Period Credit tef:FinancialResult
607 Profit before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
608 Income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
609 Result for the period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
610 Net cash flow provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
611 Capital expenditures (CapEx) Concept (Monetary) For Period Credit ifrs-full:PaymentsForDevelopmentProjectExpenditure
612 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
613 2402405 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Change in the Presentation Criteria for Hyperinflation Effects in Equity (Details) Network

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620 Hyperinflation Effect [Roll Forward] Abstract tef:HyperinflationEffectRollForward
621 Capital Concept (Monetary) As Of Credit ifrs-full:Equity
622 2402406 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Hyper-inflation in Argentina (Details) Network

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623 Disclosure of subsidiaries [table] Table

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630 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
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634 Closing foreign exchange rate Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
635 Accounting change impact and initial impact of hyperinflation Concept (Monetary) As Of Credit tef:AccountingChangeImpactandInitialImpactofHyperinflation
636 Translation differences Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughChangeInTranslationDifferencesEquity
637 Condensed Financial Information Disclosure [Abstract] Abstract srt:CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract
638 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
639 Operating income before depreciation and amortization (OIBDA) Concept (Monetary) For Period Credit tef:ProfitLossFromOperatingActivitiesBeforeDepreciationAndAmortizationExpense
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641 Net result Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
642 Capital expenditures (CapEx) Concept (Monetary) For Period Credit ifrs-full:PaymentsForDevelopmentProjectExpenditure
643 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
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645 2402407 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Capital Increase in Colombia Telecommunicaciones (Details) Network

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646 Disclosure of subsidiaries [table] Table

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663 2402408 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Individual Suspension Plan (Details) Network

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664 Disclosure of other provisions [table] Table

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670 2402409 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Court Proceedings (Details) Network

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677 2402410 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Sale of Share Capital (Details) Network

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709 2403403 - Disclosure - Accounting Policies - Hyperinflationary Economies (Details) Network

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720 2403404 - Disclosure - Accounting Policies - Intangible Assets (Details) Network

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721 Disclosure of detailed information about intangible assets [table] Table

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732 2403405 - Disclosure - Accounting Policies - Estimated Useful Life of Depreciable Assets (Details) Network

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733 Disclosure of detailed information about property, plant and equipment [table] Table

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747 2403406 - Disclosure - Accounting Policies - IFRS 16 Leases (Details) Network

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748 Disclosure of quantitative information about right-of-use assets [table] Table

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762 2404402 - Disclosure - Segment Information - Narrative (Details) Network

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763 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
764 Segments [axis] Axis ifrs-full:SegmentsAxis
765 Segments [member] Member ifrs-full:SegmentsMember
766 Other companies and eliminations Member tef:OtherCompaniesAndEliminationsMember
767 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
768 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
769 Inter-segment eliminations Member ifrs-full:EliminationOfIntersegmentAmountsMember
770 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
771 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
772 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
773 Subsidiaries Excluding Telxius Member tef:SubsidiariesExcludingTelxiusMember
774 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
775 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
776 OIBDA Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
777 Capital expenditures (CapEx) Concept (Monetary) For Period Credit ifrs-full:PaymentsForDevelopmentProjectExpenditure
778 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
779 2404403 - Disclosure - Segment Information - Income and Capital Expenditure Information Regarding Operating Segments (Details) Network

*

*

 http://www.telefonica.com/role/SegmentInformationIncomeAndCapitalExpenditureInformationRegardingOperatingSegmentsDetails
780 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
781 Legal Entity [Axis] Axis dei:LegalEntityAxis
782 Entity [Domain] Member dei:EntityDomain
783 Telefonica, S.A. Member tef:TelefonicaS.A.Member
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785 Segments [member] Member ifrs-full:SegmentsMember
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788 Telefónica Germany Member tef:TelefonicaGermanyMember
789 Telefónica Brazil Member tef:TelefonicaBrazilMember
790 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
791 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
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797 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
798 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
799 External revenues Concept (Monetary) For Period Credit tef:ExternalRevenue
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802 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
803 OPERATING INCOME Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
804 Capital expenditures (CapEx) Concept (Monetary) For Period Credit ifrs-full:PaymentsForDevelopmentProjectExpenditure
805 2404404 - Disclosure - Segment Information - Segment Assets, Liabilities and Investments Accounted for by the Equity Method (Details) Network

*

*

 http://www.telefonica.com/role/SegmentInformationSegmentAssetsLiabilitiesAndInvestmentsAccountedForByEquityMethodDetails
806 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
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808 Entity [Domain] Member dei:EntityDomain
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810 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
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813 Other companies and eliminations Member tef:OtherCompaniesAndEliminationsMember
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817 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
818 Telefónica Germany Member tef:TelefonicaGermanyMember
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820 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
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822 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
823 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
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827 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
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829 Non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
830 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
831 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
832 Total allocated liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
833 2404405 - Disclosure - Segment Information - Composition of Segment Revenues, Detailed by the Main Countries of Operation (Details) Network

*

*

 http://www.telefonica.com/role/SegmentInformationCompositionOfSegmentRevenuesDetailedByMainCountriesOfOperationDetails
834 Disclosure of geographical areas [table] Table

*

*

 ifrs-full:DisclosureOfGeographicalAreasTable
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838 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
839 Telefónica Germany Member tef:TelefonicaGermanyMember
840 Telefónica Brazil Member tef:TelefonicaBrazilMember
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842 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
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856 Argentina Member country:AR
857 Chile Member country:CL
858 Peru Member country:PE
859 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
860 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
861 Operating segments Member ifrs-full:OperatingSegmentsMember
862 Remaining operators and segment eliminations Member ifrs-full:MaterialReconcilingItemsMember
863 Other companies and eliminations Member tef:OtherCompaniesAndEliminationsMember
864 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
865 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
866 2405402 - Disclosure - Business Combinations and Acquisitions of Non-Controlling Interests - Coltel Acquisitions (Details) Network

*

*

 http://www.telefonica.com/role/BusinessCombinationsAndAcquisitionsOfNonControllingInterestsColtelAcquisitionsDetails
867 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
868 Legal Entity [Axis] Axis dei:LegalEntityAxis
869 Entity [Domain] Member dei:EntityDomain
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871 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
872 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
873 Customer base Member ifrs-full:CustomerrelatedIntangibleAssetsMember
874 Other intangible assets Member ifrs-full:OtherIntangibleAssetsMember
875 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
876 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
877 Telebucaramanga, Metrotel, and Optecom Acquisition Member tef:TelebucaramangaMetrotelandOptecomAcquisitionMember
878 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
879 Consideration paid for the acquisition of control Concept (Monetary) As Of Credit ifrs-full:CashTransferred
880 Fair value of the prior stake Concept (Monetary) As Of Credit tef:EquityInterestsOfAcquirerAttributableToParent
881 Fair value of the minority stake Concept (Monetary) As Of Credit tef:EquityInterestsOfAcquirerNoncontrollingInterest
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883 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
884 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
885 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssetsRecognisedAsOfAcquisitionDate
886 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsRecognisedAsOfAcquisitionDate
887 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
888 Other current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsRecognisedAsOfAcquisitionDate
889 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
890 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate
891 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilitiesRecognisedAsOfAcquisitionDate
892 Fair value of net assets Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
893 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
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895 2405403 - Disclosure - Business Combinations and Acquisitions of Non-Controlling Interests - Sale of Share Capital of Telxius (Details) Network

*

*

 http://www.telefonica.com/role/BusinessCombinationsAndAcquisitionsOfNonControllingInterestsSaleOfShareCapitalOfTelxiusDetails
896 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
897 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
898 Equity [member] Member ifrs-full:EquityMember
899 Non-controlling interests Member ifrs-full:NoncontrollingInterestsMember
900 Legal Entity [Axis] Axis dei:LegalEntityAxis
901 Entity [Domain] Member dei:EntityDomain
902 Telefonica, S.A. Member tef:TelefonicaS.A.Member
903 Pontel Participaciones, SL Member tef:PontelParticipacionesSLMember
904 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
905 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
906 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
907 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
908 Counterparties [member] Member ifrs-full:CounterpartiesMember
909 Pontegadea Group Member tef:PontegadeaGroupMember
910 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
911 Proportion of voting equity transferred (as a percent) Concept (Percent) As Of tef:PercentageOfVotingEquityTransferedAsConsideration
912 Proportion of ownership interest (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
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914 Transfer price per share (EUR per share) Concept (Share) For Period tef:Transferpricepershare
915 Proportion of indirect participation (as a percent) Concept (Percent) For Period tef:Indirectparticipationpercentage
916 Impact of transaction in equity attributable to equity holders Concept (Monetary) As Of Credit tef:ImpactofTransactioninEquityAttributabletoEquityHolders
917 Increase (decrease) in equity through change in equity of equity holders Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
918 2405404 - Disclosure - Business Combinations and Acquisitions of Non-Controlling Interests - Share Exchange with KPN (Details) Network

*

*

 http://www.telefonica.com/role/BusinessCombinationsAndAcquisitionsOfNonControllingInterestsShareExchangeWithKpnDetails
919 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
920 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
921 Equity [member] Member ifrs-full:EquityMember
922 Treasury shares Member ifrs-full:TreasurySharesMember
923 Retained earnings Member ifrs-full:RetainedEarningsMember
924 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
925 Counterparties [member] Member ifrs-full:CounterpartiesMember
926 Koninklijke KPN NV Member tef:KoninklijkeKPNNVMember
927 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
928 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
929 Telefónica Deutschland Holding, A.G. Member tef:TelefonicaDeutschlandHoldingMember
930 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
931 Treasury stock delivered (shares) Concept (Shares) For Period tef:TreasurySharesIssued
932 Percent of share capital transferred Concept (Pure) As Of tef:PercentOfShareCapitalTransferred
933 Number of shares received in exchange for treasury shares Concept (Shares) For Period tef:CommonSharesAcquired
934 Increase (decrease) in equity through change in equity of equity holders Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
935 Increase (decrease) in equity through treasury share transactions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions
936 Proportion of ownership interest in subsidiary (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
937 2405405 - Disclosure - Business Combinations and Acquisitions of Non-Controlling Interests - Sale of Texius Telecom, S.A. (Details) Network

*

*

 http://www.telefonica.com/role/BusinessCombinationsAndAcquisitionsOfNonControllingInterestsSaleOfTexiusTelecomSADetails
938 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
939 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
940 Equity [member] Member ifrs-full:EquityMember
941 Retained earnings Member ifrs-full:RetainedEarningsMember
942 Translation differences Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
943 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
944 Counterparties [member] Member ifrs-full:CounterpartiesMember
945 KKR Member tef:KohlbergKravisRobertsCo.L.P.KKRMember
946 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
947 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
948 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
949 Legal Entity [Axis] Axis dei:LegalEntityAxis
950 Entity [Domain] Member dei:EntityDomain
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952 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
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958 Proceeds from exchange of share capital Concept (Monetary) For Period Debit tef:ProceedsFromExchangeOfShareCapital
959 Number of share options exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
960 Increase (decrease) in equity through change in equity of equity holders Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
961 Increase (decrease) in equity through appropriation of retained earnings Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughAppropriationOfRetainedEarnings
962 Change in translation differences Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughChangeInTranslationDifferencesEquity
963 2406402 - Disclosure - Intangible Assets - Composition and Movements in Net Intangible Assets (Details) Network

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*

 http://www.telefonica.com/role/IntangibleAssetsCompositionAndMovementsInNetIntangibleAssetsDetails
964 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
965 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
966 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
967 Service concession arrangements and licenses Member ifrs-full:LicencesAndFranchisesMember
968 Software Member ifrs-full:ComputerSoftwareMember
969 Customer base Member ifrs-full:CustomerrelatedIntangibleAssetsMember
970 Trademarks Member ifrs-full:BrandNamesMember
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972 Intangible assets in process Member ifrs-full:IntangibleAssetsUnderDevelopmentMember
973 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
974 Reconciliation of changes in intangible assets other than goodwill [abstract] Abstract ifrs-full:ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract
975 Beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
976 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
977 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
978 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
979 Transfers and others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsOtherThanGoodwill
980 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
981 Exclusion of companies Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
982 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
983 2406403 - Disclosure - Intangible Assets - Gross Cost, Accumulated Amortization and Impairment Losses of Intangible Assets (Details) Network

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*

 http://www.telefonica.com/role/IntangibleAssetsGrossCostAccumulatedAmortizationAndImpairmentLossesOfIntangibleAssetsDetails
984 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
985 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
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987 Service concession arrangements and licenses Member ifrs-full:LicencesAndFranchisesMember
988 Software Member ifrs-full:ComputerSoftwareMember
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990 Trademarks Member ifrs-full:BrandNamesMember
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998 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
999 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1000 2406404 - Disclosure - Intangible Assets - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/IntangibleAssetsNarrativeDetails
1001 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
1002 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1003 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
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1005 Telefónica United Kingdom Ltd. Wireless communications Member tef:TelefonicaUnitedKingdomLimitedMember
1006 Telefónica Spain Member tef:TelefonicaSpainMember
1007 Telefónica México Member tef:TelefonicaMexicoMember
1008 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
1009 Telefónica Argentina Member tef:TelefonicaArgentinaMember
1010 Telefónica Moviles Guatemala Member tef:TelefonicaMovilesGuatemalaMember
1011 Telefónica Moviles El Salvador Member tef:TelefonicaMovilesElSalvadorMember
1012 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
1013 Legal Entity [Axis] Axis dei:LegalEntityAxis
1014 Entity [Domain] Member dei:EntityDomain
1015 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
1016 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1017 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1018 Service concession arrangements and licenses Member ifrs-full:LicencesAndFranchisesMember
1019 Software Member ifrs-full:ComputerSoftwareMember
1020 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1021 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1022 Transfers and others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsOtherThanGoodwill
1023 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
1024 Issued capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1025 2407402 - Disclosure - Goodwill - Reconciliation of Goodwill by Group Segment (Details) Network

*

*

 http://www.telefonica.com/role/GoodwillReconciliationOfGoodwillByGroupSegmentDetails
1026 Disclosure of reconciliation of changes in intangible assets and goodwill [table] Table

*

*

 ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
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1030 Telefónica Brazil Member tef:TelefonicaBrazilMember
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1034 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
1035 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1036 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
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1043 Reconciliation of changes in intangible assets and goodwill [abstract] Abstract ifrs-full:ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract
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1045 Transfer to Non-currents assets held for sale Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
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1047 Exchange rate impact and other Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1048 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
1049 2407403 - Disclosure - Goodwill - Narrative (Details) Network

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*

 http://www.telefonica.com/role/GoodwillNarrativeDetails
1050 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
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1070 Telefónica Europe Member tef:TelefonicaEuropeMember
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1076 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1077 Impairment loss Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1078 Estimated weighted-average cost of capital - WACC (as a percent) Concept (Percent) For Period ifrs-full:WeightedAverageCostOfCapitalSignificantUnobservableInputsAssets
1079 Strategic plan term Concept (xbrli:durationItemType) For Period tef:StrategicPlanTerm
1080 Years of cash flows Concept (xbrli:durationItemType) For Period tef:YearsOfCashFlowsUsedInImpairmentTesting
1081 Normalization period added to term of strategic plan Concept (xbrli:durationItemType) For Period tef:StrategicPlanTermNormalizationPeriod
1082 OIBDA margin ratio Concept (Percent) For Period tef:OperatingIncomeBeforeDepreciationAndAmortizationRatio
1083 Long-term capital expenditure (CapEx) ratio Concept (Percent) For Period tef:LongTermCapitalExpendituresRatio
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1085 Targeted growth rate Concept (Percent) As Of tef:TargetGrowthRate
1086 Change in key assumption rate (as a percent) Concept (Percent) As Of tef:SensitivityAnalysisBasisSpreadOnVariableRate
1087 Decrease of goodwill in relation to sale Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1088 2407404 - Disclosure - Goodwill - Allocation of Goodwill to Cash-Generating Units (Details) Network

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 http://www.telefonica.com/role/GoodwillAllocationOfGoodwillToCashGeneratingUnitsDetails
1089 Disclosure of detailed information about intangible assets [table] Table

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1097 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
1098 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1099 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1100 Operating segments Member ifrs-full:OperatingSegmentsMember
1101 Others Member tef:OtherCompaniesAndEliminationsMember
1102 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1103 Geographical areas [Domain] Member ifrs-full:GeographicalAreasMember
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1115 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1116 Intangible assets and goodwill Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
1117 2407405 - Disclosure - Goodwill - After-Tax Discount Rates Applied to the Cash Flow Projections (Details) Network

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 http://www.telefonica.com/role/GoodwillAfterTaxDiscountRatesAppliedToCashFlowProjectionsDetails
1118 Disclosure of detailed information about intangible assets [table] Table

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1119 Segments [axis] Axis ifrs-full:SegmentsAxis
1120 Segments [member] Member ifrs-full:SegmentsMember
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1122 Telefónica Brazil Member tef:TelefonicaBrazilMember
1123 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
1124 Telefónica Germany Member tef:TelefonicaGermanyMember
1125 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1126 Before-tax discount rates applied to cash flow projections Concept (Percent) As Of tef:DiscountRateAppliedToCashFlowProjectionsBeforeTax
1127 After-tax discount rates applied to cash flow projections Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1128 2407406 - Disclosure - Goodwill - Perpetuity Growth Rate Applied to Cash Flow Projections (Details) Network

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 http://www.telefonica.com/role/GoodwillPerpetuityGrowthRateAppliedToCashFlowProjectionsDetails
1129 Disclosure of detailed information about intangible assets [table] Table

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1130 Segments [axis] Axis ifrs-full:SegmentsAxis
1131 Segments [member] Member ifrs-full:SegmentsMember
1132 Telefónica Spain Member tef:TelefonicaSpainMember
1133 Telefónica Brazil Member tef:TelefonicaBrazilMember
1134 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
1135 Telefónica Germany Member tef:TelefonicaGermanyMember
1136 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1137 Growth rate applied to cash flow projections Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1138 2407407 - Disclosure - Goodwill - Sensitivity to Changes in Assumptions (Details) Network

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 http://www.telefonica.com/role/GoodwillSensitivityToChangesInAssumptionsDetails
1139 Disclosure of detailed information about intangible assets [table] Table

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*

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1140 Segments [axis] Axis ifrs-full:SegmentsAxis
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1142 Telefónica Spain Member tef:TelefonicaSpainMember
1143 Telefónica Germany Member tef:TelefonicaGermanyMember
1144 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
1145 Telefónica Brazil Member tef:TelefonicaBrazilMember
1146 Variable Rate [Axis] Axis tef:VariableRate1Axis
1147 Variable Rate [Domain] Member tef:VariableRate1Domain
1148 Discount rate Member tef:DiscountRateAppliedToCashFlowProjectionsMember
1149 Perpetuity growth rates Member tef:GrowthRateUsedToExtrapolateCashFlowProjectionsMember
1150 OIBDA Margin Member tef:OperatingIncomebeforeDepreciationandAmortizationRatioMember
1151 Ratio of CapEx/Revenues Member tef:LongTermCapitalExpendituresRatioMember
1152 Range [axis] Axis ifrs-full:RangeAxis
1153 Ranges [member] Member ifrs-full:RangesMember
1154 Minimum Member ifrs-full:BottomOfRangeMember
1155 Maximum Member ifrs-full:TopOfRangeMember
1156 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1157 Change in key assumption rate (as a percent) Concept (Percent) As Of tef:SensitivityAnalysisBasisSpreadOnVariableRate
1158 2408402 - Disclosure - Property, Plant and Equipment - Composition of and Movement in Net Property, Plant and Equipment (Details) Network

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 http://www.telefonica.com/role/PropertyPlantAndEquipmentCompositionOfAndMovementInNetPropertyPlantAndEquipmentDetails
1159 Disclosure of detailed information about property, plant and equipment [table] Table

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*

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1162 Land and buildings Member ifrs-full:LandAndBuildingsMember
1163 Plant and machinery Member ifrs-full:MachineryMember
1164 Furniture, tools and other items Member ifrs-full:OtherPropertyPlantAndEquipmentMember
1165 PP&E in progress Member ifrs-full:ConstructionInProgressMember
1166 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1167 Reconciliation of changes in property, plant and equipment [abstract] Abstract ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
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1169 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1170 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1171 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
1172 Transfers and others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
1173 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1174 Inclusion of companies Concept (Monetary) For Period Debit tef:IncreaseDecreaseInPropertyPlantAndEquipmentFromInclusionOrExclusionOfCompanies
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1176 2408403 - Disclosure - Property, Plant and Equipment - Gross Cost, Accumulated Depreciation and Impairment Losses of Property, Plant and Equipment (Details) Network

*

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 http://www.telefonica.com/role/PropertyPlantAndEquipmentGrossCostAccumulatedDepreciationAndImpairmentLossesOfPropertyPlantAndEquipmentDetails
1177 Disclosure of detailed information about property, plant and equipment [table] Table

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*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1178 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
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1181 Plant and machinery Member ifrs-full:MachineryMember
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1183 PP&E in progress Member ifrs-full:ConstructionInProgressMember
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1186 Gross cost Member ifrs-full:GrossCarryingAmountMember
1187 Accumulated depreciation Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
1188 Impairment losses Member ifrs-full:AccumulatedImpairmentMember
1189 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1190 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1191 2408404 - Disclosure - Property, Plant and Equipment - Narrative (Details) Network

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*

 http://www.telefonica.com/role/PropertyPlantAndEquipmentNarrativeDetails
1192 Disclosure of detailed information about property, plant and equipment [table] Table

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*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
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1196 Buildings Member ifrs-full:BuildingsMember
1197 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1198 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1199 Argentina Member country:AR
1200 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1201 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1202 Telefónica Moviles Guatemala Member tef:TelefonicaMovilesGuatemalaMember
1203 Telefónica El Salvador Member tef:TelefonicaMovilesElSalvadorMember
1204 Segments [axis] Axis ifrs-full:SegmentsAxis
1205 Segments [member] Member ifrs-full:SegmentsMember
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1207 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
1208 Telefónica Germany Member tef:TelefonicaGermanyMember
1209 Telefónica Brazil Member tef:TelefonicaBrazilMember
1210 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
1211 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
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1215 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
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1218 Percent of population coverage by LTE networks Concept (Percent) For Period tef:PercentageOfPopulationCoveredInLTENetwork
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1220 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1221 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1222 2409402 - Disclosure - Associates and Joint Ventures - Summary (Details) Network

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*

 http://www.telefonica.com/role/AssociatesAndJointVenturesSummaryDetails
1223 Disclosure Of Joint Ventures And Associates [Table] Table

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*

 tef:DisclosureOfJointVenturesAndAssociatesTable
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1227 Disclosure Of Joint Ventures And Associates [Line Items] LineItems tef:DisclosureOfJointVenturesAndAssociatesLineItems
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1229 Loans to associates and joint ventures Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesDueFromJointVentures
1230 Receivables from associates and joint ventures for current operations (Note 12) Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesDueFromJointVentures
1231 Financial debt, associates and joint ventures Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToRelatedParties
1232 Payables to associates and joint ventures (Note 19) Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1233 Share of income (loss) of investments accounted for by the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1234 Revenue from operations with associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:Revenue
1235 Expenses from operations with associates and joint ventures Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
1236 Financial revenues with associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
1237 Financial expenses with associates and joint ventures Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
1238 2409403 - Disclosure - Associates and Joint Ventures - Equity Method Investment of Associates (Details) Network

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*

 http://www.telefonica.com/role/AssociatesAndJointVenturesEquityMethodInvestmentOfAssociatesDetails
1239 Disclosure of associates [table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1240 Associates and Joint Ventures [Axis] Axis tef:AssociatesandJointVenturesAxis
1241 Associates and Joint Ventures [Domain] Member tef:AssociatesandJointVenturesDomain
1242 Associates and Joint Ventures Member tef:AssociatesandJointVenturesMember
1243 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1244 Investments accounted for by the equity method at period start Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1245 Additions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
1246 Disposals Concept (Monetary) For Period Credit tef:InvestmentsInSubsidiariesJointVenturesAndAssociatesDisposals
1247 Translation differences and other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
1248 Income (loss) Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1249 Dividends Concept (Monetary) For Period Debit tef:DecreaseThroughDistributionsJointVenturesAndAssociates
1250 Transfers and others Concept (Monetary) For Period Debit tef:TransferfromtoInvestmentsEquityMethodInvestments
1251 Investments accounted for by the equity method at period end Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1252 2410402 - Disclosure - Related Parties - Narrative (Details) Network

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*

 http://www.telefonica.com/role/RelatedPartiesNarrativeDetails
1253 Disclosure of transactions between related parties [table] Table

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*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1254 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1255 Entity's total for joint ventures [member] Member ifrs-full:JointVenturesMember
1256 Beijing Jingdong Financial Technology Holding Co., Ltd. Member tef:BeijingJingdongFinancialTechnologyHoldingCo.Ltd.Member
1257 DTS Member tef:DistribuidoradeTelevisionDigitalS.A.Member
1258 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1259 Hedging instruments Member ifrs-full:HedgingInstrumentsMember
1260 Derivative instruments Member ifrs-full:DerivativesMember
1261 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1262 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1263 BBVA Member tef:BilbaoVizcayaArgentariaMember
1264 La Caixa Member tef:CajadeAhorrosyPensionesdeBarcelonaMember
1265 Global Dominion Access Group Member tef:GlobalDominionAccessGroupMember
1266 China Unicom Broadband Online Limited Corp. Member tef:ChinaUnicomBroadbanOnlineLimitedCorp.Member
1267 Beijing Jingdong Financial Technology Holding Co., Ltd. Member tef:BeijingJingdongFinancialTechnologyHoldingCo.Ltd.Member
1268 Legal Entity [Axis] Axis dei:LegalEntityAxis
1269 Entity [Domain] Member dei:EntityDomain
1270 BBVA Member tef:BilbaoVizcayaArgentariaMember
1271 Blackrock inc. Member tef:Blackrockinc.Member
1272 La Caixa Member tef:CajadeAhorrosyPensionesdeBarcelonaMember
1273 DTS Member tef:DistribuidoradeTelevisionDigitalS.A.Member
1274 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1275 Significant shareholder stake of the Company Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1276 Nominal amount of hedging instrument Concept (Monetary) As Of ifrs-full:CreditDerivativeNominalAmount
1277 Derivative fair value Concept (Monetary) As Of Debit ifrs-full:CreditDerivativeFairValue
1278 Collateral guarantees on derivatives Concept (Monetary) For Period ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
1279 Unearned premiums Concept (Monetary) As Of Credit ifrs-full:UnearnedPremiums
1280 Receipt of services Concept (Monetary) For Period Debit ifrs-full:ServicesReceivedRelatedPartyTransactions
1281 Proportion of ownership interest in joint operation Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
1282 Turnover Concept (Monetary) For Period Credit tef:Turnover
1283 2410403 - Disclosure - Related Parties - Summary of Significant Transactions (Details) Network

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 http://www.telefonica.com/role/RelatedPartiesSummaryOfSignificantTransactionsDetails
1284 Disclosure of transactions between related parties [table] Table

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*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1285 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1286 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1287 BBVA Member tef:BilbaoVizcayaArgentariaMember
1288 La Caixa Member tef:CajadeAhorrosyPensionesdeBarcelonaMember
1289 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1290 Finance costs Concept (Monetary) For Period Debit tef:TransferCostsUnderFinanceAgreementsRelatedPartyTransactions
1291 Receipt of services Concept (Monetary) For Period Debit ifrs-full:ServicesReceivedRelatedPartyTransactions
1292 Purchase of goods Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1293 Other expenses Concept (Monetary) For Period Debit tef:OtherExpensesRelatedPartyTransaction
1294 Total costs Concept (Monetary) For Period Debit tef:TotalExpensesRelatedPartyTransaction
1295 Finance income Concept (Monetary) For Period Credit tef:IncomeUnderFinanceAgreementsRelatedPartyTransaction
1296 Contracts of management Concept (Monetary) For Period Credit tef:ContractsofManagementRelatedPartyTransactions
1297 Dividends received Concept (Monetary) For Period Credit tef:DividendsReceivedRelatedPartyTransactions
1298 Services rendered Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
1299 Sale of goods Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1300 Other income Concept (Monetary) For Period Credit tef:RevenueFromOtherSourcesRelatedPartyTransaction
1301 Total revenue Concept (Monetary) For Period Credit tef:TotalRevenueRelatedPartyTransactions
1302 Finance arrangements: loans and capital contributions (borrower) Concept (Monetary) For Period ifrs-full:TransfersUnderFinanceAgreementsFromEntityRelatedPartyTransactions
1303 Finance arrangements: loans and capital contributions (lessee) Concept (Monetary) For Period ifrs-full:TransfersUnderFinanceAgreementsToEntityRelatedPartyTransactions
1304 Guarantees Concept (Monetary) For Period ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
1305 Commitments Concept (Monetary) For Period ifrs-full:CommitmentsMadeByEntityRelatedPartyTransactions
1306 Finance arrangements: loans and capital contributions (lender) Concept (Monetary) For Period ifrs-full:LeasesAsLesseeRelatedPartyTransactions
1307 Dividends paid Concept (Monetary) For Period Debit tef:DividendsPaidRelatedPartyTransactions
1308 Factoring operations Concept (Monetary) For Period Credit tef:FactoringOperationsRelatedPartyTransactions
1309 Significant shareholder stake of the Company Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1310 2411402 - Disclosure - Financial Assets and Other Non-current Assets - Breakdown of Assets (Details) Network

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 http://www.telefonica.com/role/FinancialAssetsAndOtherNonCurrentAssetsBreakdownOfAssetsDetails
1311 Disclosure of financial assets [table] Table

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*

 ifrs-full:DisclosureOfFinancialAssetsTable
1312 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
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1316 Deposits and guarantees Member tef:DepositsAndGuaranteesMember
1317 Trade receivables Member ifrs-full:TradeReceivablesMember
1318 Derivative instruments Member ifrs-full:DerivativesMember
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1320 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1321 Non-current financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1322 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
1323 Contractual assets (Note 20) Concept (Monetary) As Of Debit ifrs-full:NoncurrentContractAssets
1324 Deferred expenses (Note 20) Concept (Monetary) As Of Debit tef:NonCurrentAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
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1326 Total Concept (Monetary) As Of Debit tef:NonCurrentFinancialAssetsAndOtherNonCurrentAssets
1327 2411403 - Disclosure - Financial Assets and Other Non-current Assets - Movement in Non-current Financial Assets (Details) Network

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 http://www.telefonica.com/role/FinancialAssetsAndOtherNonCurrentAssetsMovementInNonCurrentFinancialAssetsDetails
1328 Disclosure of financial assets [table] Table

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*

 ifrs-full:DisclosureOfFinancialAssetsTable
1329 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1330 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1331 Investments Member ifrs-full:EquityInvestmentsMember
1332 Long-term credits Member tef:NoncurrentCreditsMember
1333 Deposits and guarantees Member tef:DepositsAndGuaranteesMember
1334 Trade receivables Member ifrs-full:TradeReceivablesMember
1335 Impairment losses Member ifrs-full:FinancialAssetsImpairedMember
1336 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1337 Non-current financial assets, beginning balance Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1338 First application of IFRS 9 impact Concept (Monetary) As Of Debit ifrs-full:IncreaseDecreaseInFinancialAssetsOnBasisOfMeasurementCategoryFirstApplicationOfIFRS9
1339 Acquisitions Concept (Monetary) For Period Debit tef:AcquisitionsThroughBusinessCombinationsNoncurrentFinancialAssets
1340 Disposals Concept (Monetary) For Period Credit tef:DisposalsNoncurrentFinancialAssets
1341 Translation differences Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughNetExchangeDifferencesNoncurrentFinancialAssets
1342 Fair value adjustments and financial updates Concept (Monetary) For Period Debit tef:GainsLossesOnFairValueAdjustmentNoncurrentFinancialAssets
1343 Transfers and other Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughOtherChangesNoncurrentFinancialAssets
1344 Non-current financial assets, ending balance Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1345 2411404 - Disclosure - Financial Assets and Other Non-current Assets - Narrative (Details) Network

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 http://www.telefonica.com/role/FinancialAssetsAndOtherNonCurrentAssetsNarrativeDetails
1346 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1347 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1348 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1349 Banco Bilbao Vizcaya Argentaria (BBVA) Member tef:BilbaoVizcayaArgentariaMember
1350 China Unicom Member tef:ChinaUnicomBroadbanOnlineLimitedCorp.Member
1351 Promotora de informaciones, S.A. (Prisa) Member tef:PromotoraDeInformacionesSAMember
1352 Mediaset Premium Member tef:MediasetPremiumMember
1353 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1354 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1355 Seguos de Vida y Pensiones Antares Member tef:SeguosdeVidayPensionesAntaresMember
1356 Segments [axis] Axis ifrs-full:SegmentsAxis
1357 Segments [member] Member ifrs-full:SegmentsMember
1358 Telefónica Germany Member tef:TelefonicaGermanyMember
1359 Telefonica Brasil S.A. Member tef:TelefonicaBrasilS.A.Member
1360 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1361 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1362 Collateral guarantees on derivatives Member ifrs-full:GuaranteesMember
1363 Cross currency swaps Member ifrs-full:CurrencySwapContractMember
1364 Range [axis] Axis ifrs-full:RangeAxis
1365 Ranges [member] Member ifrs-full:RangesMember
1366 Minimum Member srt:MinimumMember
1367 Maximum Member srt:MaximumMember
1368 Legal Entity [Axis] Axis dei:LegalEntityAxis
1369 Entity [Domain] Member dei:EntityDomain
1370 Telefónica Emisiones, S.A.U. Member tef:TelefonicaEmisionesS.A.U.Member
1371 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1372 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
1373 Proportion of ownership interest in associate (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1374 Share capital sold Concept (Monetary) As Of Credit tef:ShareCapitalSold
1375 Negative impact in net financial expense Concept (Monetary) As Of Credit tef:ShareCapitalSoldNegativeImpactinNetFinancialExpense
1376 Acquisitions (shares) Concept (Shares) For Period tef:CommonSharesAcquired
1377 Payments for equity Concept (Monetary) For Period Credit ifrs-full:PaymentsOfOtherEquityInstruments
1378 Profit (loss) on disposal of investments and changes in value of investments Concept (Monetary) For Period Credit ifrs-full:ProfitsLossesOnDisposalOfInvestmentsAndChangesInValueOfInvestments
1379 Increase in credits and other financial assets Concept (Monetary) For Period Debit tef:IncreaseDecreaseInCreditsAndOtherFinancialAssets
1380 Increase (reduction) to tax expense due to decisions with tax authorities Concept (Monetary) For Period Debit tef:IncreaseDecreaseInTaxExpenseDueToDecisionsWithTaxAuthorities
1381 Increase (reduction) to finance income due to decisions with tax authorities Concept (Monetary) For Period Debit tef:IncreaseDecreaseInFinanceIncomeDueToDecisionsWithTaxAuthorities
1382 Outstanding tax credit Concept (Monetary) As Of ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
1383 Non-current receivables from indirect taxes Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesFromTaxesOtherThanIncomeTax
1384 Estimated financial effect of contingent assets Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentAssets
1385 Other long-term credits Concept (Monetary) As Of Debit tef:NoncurrentOtherCredits
1386 Long-term financial assets Concept (Monetary) As Of Debit tef:LongTermFinancialAssets
1387 Long-term deposits Concept (Monetary) As Of Debit ifrs-full:LongtermDeposits
1388 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1389 Number of bonds issued Concept (Integer) For Period tef:NumberOfBondsIssued
1390 Bonds issued Concept (Monetary) As Of Credit ifrs-full:BondsIssued
1391 2411405 - Disclosure - Financial Assets and Other Non-current Assets - Long-term Credits And Impairment Losses (Details) Network

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 http://www.telefonica.com/role/FinancialAssetsAndOtherNonCurrentAssetsLongTermCreditsAndImpairmentLossesDetails
1392 Implied Table Table

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*

 implied:Table
1393 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
1394 Non-current value added tax receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentValueAddedTaxReceivables
1395 Other long-term credits Concept (Monetary) As Of Debit tef:NoncurrentOtherCredits
1396 Total Concept (Monetary) As Of Debit tef:NoncurrentCredits
1397 2412402 - Disclosure - Receivables and Other Current Assets - Summary (Details) Network

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*

 http://www.telefonica.com/role/ReceivablesAndOtherCurrentAssetsSummaryDetails
1398 Implied Table Table

*

*

 implied:Table
1399 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
1400 Receivables (Note 14) Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
1401 Trade receivables billed Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1402 Impairment of trade receivables Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1403 Receivables from associates and joint ventures (Note 9) Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesDueFromJointVentures
1404 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
1405 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
1406 Contractual assets (Note 20) Concept (Monetary) As Of Debit ifrs-full:CurrentContractAssets
1407 Capitalized costs (Note 20) Concept (Monetary) As Of Debit tef:CurrentAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
1408 Prepayments Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
1409 Total Concept (Monetary) As Of Debit tef:CurrentReceivablesAndOtherCurrentAssets
1410 2412403 - Disclosure - Receivables and Other Current Assets - Narrative (Details) Network

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*

 http://www.telefonica.com/role/ReceivablesAndOtherCurrentAssetsNarrativeDetails
1411 Disclosure of Trade and Other Receivables [Table] Table

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*

 tef:DisclosureOfTradeAndOtherReceivablesTable
1412 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1413 Customers [member] Member ifrs-full:MajorCustomersMember
1414 Government Member ifrs-full:GovernmentMember
1415 Disclosure of Trade and Other Receivables [Line Items] LineItems tef:DisclosureOfTradeAndOtherReceivablesLineItems
1416 Current trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1417 2412404 - Disclosure - Receivables and Other Current Assets - Impairment Provision (Details) Network

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*

 http://www.telefonica.com/role/ReceivablesAndOtherCurrentAssetsImpairmentProvisionDetails
1418 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1419 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1420 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1421 Trade receivables Member ifrs-full:TradeReceivablesMember
1422 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1423 Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Abstract ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
1424 Impairment provision at period start Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1425 Adjustment on initial application of NIIF 9 (Note 14) Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughAdjustmentsForNewAccountingStandardsAllowanceAccountforCreditLossesofFinancialAssets
1426 Allowances Concept (Monetary) For Period ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
1427 Transfers Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughTransfersAllowanceAccountforCreditLossesofFinancialAssets
1428 Inclusion of companies Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughInclusionofCompaniesAllowanceAccountforCreditLossesofFinancialAssets
1429 Amounts applied Concept (Monetary) For Period ifrs-full:ReversalAllowanceAccountForCreditLossesOfFinancialAssets
1430 Translation differences and other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1431 Impairment provision at period end Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1432 2412405 - Disclosure - Receivables and Other Current Assets - Billed and Unbilled Trade Receivables (Details) Network

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*

 http://www.telefonica.com/role/ReceivablesAndOtherCurrentAssetsBilledAndUnbilledTradeReceivablesDetails
1433 Disclosure of Trade and Other Receivables [Table] Table

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*

 tef:DisclosureOfTradeAndOtherReceivablesTable
1434 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1435 Past due status [member] Member ifrs-full:PastDueStatusMember
1436 Trade receivables pending billing Member tef:UnbilledMember
1437 Amount not overdue invoiced Member ifrs-full:CurrentMember
1438 Less than 90 days Member ifrs-full:NotLaterThanThreeMonthsMember
1439 Between 90 and 180 days Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanSixMonthsMember
1440 Between 180 and 360 days Member ifrs-full:LaterThanSixMonthsAndNotLaterThanOneYearMember
1441 More than 360 days Member ifrs-full:LaterThanOneYearMember
1442 Disclosure of Trade and Other Receivables [Line Items] LineItems tef:DisclosureOfTradeAndOtherReceivablesLineItems
1443 Current trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1444 Allowance account for credit losses of financial assets Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1445 2413401 - Disclosure - Other Current Financial Assets - Narrative (Details) Network

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*

 http://www.telefonica.com/role/OtherCurrentFinancialAssetsNarrativeDetails
1446 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1447 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1448 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1449 Derivative instruments Member ifrs-full:DerivativesMember
1450 Short-term investments Member tef:ShortTermEquityInvestmentsMember
1451 Short-term investments - Antares Member tef:ShortTermEquityInvestmentsAntaresMember
1452 Deposits and guarantees Member tef:DepositsAndGuaranteesMember
1453 Legal deposits Member tef:LegalDepositsMember
1454 Short-term credits, net of impairment provisions Member ifrs-full:FinancialAssetsImpairedMember
1455 Bank deposits Member tef:BankDepositsMember
1456 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1457 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1458 2414402 - Disclosure - Breakdown of Financial Assets - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/BreakdownOfFinancialAssetsNarrativeDetails
1459 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1460 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1461 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1462 IFRS 9 Member tef:IFRS9Member
1463 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1464 Adjustment on initial application of new reporting Concept (Monetary) As Of Credit tef:GrossAdjustmentonInitialApplicationofNewReporting
1465 Impairment loss recognized in profit or loss for trade receivables Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLossTradeReceivables
1466 Adjustments for decrease (increase) in financial assets held for trading Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading
1467 Financial assets at fair value through other comprehensive income Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
1468 Financial assets at fair value through profit or loss Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
1469 Financial assets, carrying amount immediately after initial application of IFRS 9 Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
1470 Non-current trade receivables, carrying amount immediately after initial application of IFRS 9 Concept (Monetary) As Of Debit tef:NoncurrenttradereceivablescarryingamountimmediatelyafterinitialapplicationofIFRS9
1471 Reclassification out of held-to-maturity investments Concept (Monetary) For Period Credit ifrs-full:ReclassificationOutOfHeldtomaturityInvestments
1472 Reclassification out of available-for-sale financial assets into financial assets at fair value through other comprehensive income, equity instruments Concept (Monetary) For Period Credit tef:Reclassificationoutofavailableforsalefinancialassetsintofinancialassetsatfairvaluethroughothercomprehensiveincomeequityinstruments
1473 Reclassification out of available-for-sale financial assets into financial assets at fair value through profit or loss, equity instruments Concept (Monetary) For Period Credit tef:Reclassificationoutofavailableforsalefinancialassetsintofinancialassetsatfairvaluethroughprofitorlossequityinstruments
1474 Reclassification out of available-for-sale financial assets into financial assets at fair value through other comprehensive income, debt instruments Concept (Monetary) For Period Credit tef:Reclassificationoutofavailableforsalefinancialassetsintofinancialassetsatfairvaluethroughothercomprehensiveincomedebtinstruments
1475 Reclassification out of available-for-sale financial assets into financial assets at fair value through profit or loss, debt instruments Concept (Monetary) For Period Credit tef:Reclassificationoutofavailableforsalefinancialassetsintofinancialassetsatfairvaluethroughprofitorlossdebtinstruments
1476 2414403 - Disclosure - Breakdown of Financial Assets - Breakdown of Financial Assets (Details) Network

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*

 http://www.telefonica.com/role/BreakdownOfFinancialAssetsBreakdownOfFinancialAssetsDetails
1477 Disclosure of financial assets [table] Table

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*

 ifrs-full:DisclosureOfFinancialAssetsTable
1478 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1479 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1480 IFRS 9 Member tef:IFRS9Member
1481 Legal Entity [Axis] Axis dei:LegalEntityAxis
1482 Entity [Domain] Member dei:EntityDomain
1483 Telefonica, S.A. Member tef:TelefonicaSAMember
1484 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1485 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1486 Investments Member ifrs-full:EquityInvestmentsMember
1487 Long-term credits Member tef:NoncurrentCreditsMember
1488 Deposits and guarantees Member tef:DepositsAndGuaranteesMember
1489 Derivative instruments Member ifrs-full:DerivativesMember
1490 Trade receivables Member ifrs-full:TradeReceivablesMember
1491 Impairment losses Member ifrs-full:FinancialAssetsImpairedMember
1492 Cash and cash equivalents Member tef:CashAndCashEquivalents1Member
1493 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1494 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1495 Fair value through profit or loss, Held for trading Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember
1496 Fair value through profit or loss, Fair value option Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValueCategoryMember
1497 Available- for-sale Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1498 Hedges Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1499 Held-to-maturity invest-ments Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1500 Rest of financial assets at amortized cost Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1501 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1502 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1503 Level 1 (Quoted prices) Member ifrs-full:Level1OfFairValueHierarchyMember
1504 Level 2 (Other directly observable market inputs) Member ifrs-full:Level2OfFairValueHierarchyMember
1505 Level 3 (Inputs not based on observable market data) Member ifrs-full:Level3OfFairValueHierarchyMember
1506 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1507 Non-current financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1508 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1509 Total Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1510 Non-current financial assets, fair value Concept (Monetary) As Of Debit tef:NoncurrentFinancialAssetsAtFairValue
1511 Current financial assets, fair value Concept (Monetary) As Of Debit tef:CurrentFinancialAssetsAtFairValue
1512 Financial assets, fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1513 2415402 - Disclosure - Equity - Share Capital and Share Premium (Details) Network

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*

 http://www.telefonica.com/role/EquityShareCapitalAndSharePremiumDetails
1514 Disclosure of classes of share capital [table] Table

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*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1515 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1516 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1517 Ordinary shares Member ifrs-full:OrdinarySharesMember
1518 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1519 Share capital amount Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1520 Number of shares Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1521 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1522 Par value per share (EUR per share) Concept (Share) As Of ifrs-full:ParValuePerShare
1523 Maximum authorized share capital Concept (Monetary) As Of Credit tef:MaximumAuthorizedIssuedCapital
1524 Increase In Share Capital Maximum Duration Concept (xbrli:durationItemType) For Period tef:IncreaseInShareCapitalMaximumDuration
1525 Proportion Of Share Capital Excluded From Pre-Emptive Subscription Rights Concept (Percent) As Of tef:ProportionOfShareCapitalExcludedFromPreEmptiveSubscriptionRights
1526 Aggregate amount of approved securities issuance Concept (Monetary) For Period Credit tef:AggregateAmountofIssuanceofSecurities
1527 Proportion Of Shares Acquired To Treasury Shares Held Requirement Concept (Percent) As Of tef:ProportionOfSharesAcquiredToTreasurySharesHeldRequirement
1528 2415403 - Disclosure - Equity - Dividends (Details) Network

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*

 http://www.telefonica.com/role/EquityDividendsDetails
1529 Disclosure of classes of share capital [table] Table

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*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1530 Legal Entity [Axis] Axis dei:LegalEntityAxis
1531 Entity [Domain] Member dei:EntityDomain
1532 Telefonica, S.A. Member tef:TelefonicaS.A.Member
1533 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1534 Equity [member] Member ifrs-full:EquityMember
1535 Non-controlling interests Member ifrs-full:NoncontrollingInterestsMember
1536 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1537 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1538 Ordinary shares Member ifrs-full:OrdinarySharesMember
1539 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1540 Dividends paid (EUR per share) Concept (Share) For Period ifrs-full:DividendsPaidOrdinarySharesPerShare
1541 Dividends paid, total amount Concept (Monetary) For Period Debit ifrs-full:DividendsPaidOrdinaryShares
1542 Assignment dividends paid (EUR per share) Concept (Share) For Period tef:DividendsPaidAssignmentSharesPerShare
1543 Par value per share (EUR per share) Concept (Share) As Of ifrs-full:ParValuePerShare
1544 Cash dividends impact on equity Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
1545 Percentage of free-of-charge allotment rights Concept (Percent) For Period tef:PercentageofFreeofChargeAllotmentRights
1546 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1547 Legal reserve Concept (Monetary) As Of Credit ifrs-full:StatutoryReserve
1548 Other reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1549 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1550 2415404 - Disclosure - Equity - Other Equity Instruments (Details) Network

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*

 http://www.telefonica.com/role/EquityOtherEquityInstrumentsDetails
1551 Disclosure of detailed information about borrowings [table] Table

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*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1552 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1553 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1554 Ordinary shares Member ifrs-full:OrdinarySharesMember
1555 Treasury shares Member ifrs-full:TreasurySharesMember
1556 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1557 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1558 Term debt Member tef:TermDebtMember
1559 Exercisable from issuer in 2023 & Exercisable From Issuer In 2026, Issued 03/22/18 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2026UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2023Issued032218Member
1560 Exercisable from issuer in 2023 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2023Issued032218Member
1561 Exercisable From Issuer In 2026, Issued 03/22/18 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2026Member
1562 Exercisable from issuer in 2023 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2023Issued120717Member
1563 Exercisable from issuer in 2022 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerin2022Member
1564 Exercisable From Issuer In 2020, Issued 09/15/16 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2020Issued091516Member
1565 Exercisable From Issuer In 2019 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2019Member
1566 Exercisable From Issuer In 2020, Issued 03/25/14 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2020Issued033114Member
1567 Exercisable From Issuer In 2024 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2024Member
1568 Exercisable From Issuer In 2020, Issued 11/26/13 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2020Issued112613Member
1569 Exercisable From Issuer In 2018 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2018Member
1570 Exercisable From Issuer In 2021 Member tef:UndatedDeeplySubordinatedSecuritiesExercisableFromIssuerIn2021Member
1571 Issued by separate lender Member tef:IssuedBySeparateLenderMember
1572 Convertible notes converted into debt Member tef:ConvertibleNotesConvertedIntoDebtMember
1573 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1574 Equity [member] Member ifrs-full:EquityMember
1575 Retained earnings Member ifrs-full:RetainedEarningsMember
1576 Notes mandatorily convertible into shares Member ifrs-full:ReserveOfEquityComponentOfConvertibleInstrumentsMember
1577 Option to convert treasury shares into fix ratio Member tef:OptionToConvertTreasurySharesToFixRatioMember
1578 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1579 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1580 Fixed interest rate Member ifrs-full:FixedInterestRateMember
1581 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1582 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1583 Gross carrying amount Member ifrs-full:GrossCarryingAmountMember
1584 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1585 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1586 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
1587 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1588 Annual Fix Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1589 Equity Instruments [Roll Forward] Abstract tef:EquityInstrumentsRollForward
1590 Carrying value of deeply subordinated securities, beginning balance Concept (Monetary) As Of Credit ifrs-full:Borrowings
1591 Tender Offer Concept (Monetary) For Period Credit tef:TenderOfferofEquityInstrument
1592 Amount repurchased Concept (Monetary) For Period Debit tef:AmountRepurchasedofEquityInstrument
1593 Redemption Concept (Monetary) For Period Debit tef:RedemptionofEquityInstrument
1594 Carrying value of deeply subordinated securities, ending balance Concept (Monetary) As Of Credit ifrs-full:Borrowings
1595 Swap rate term Concept (xbrli:durationItemType) For Period tef:SwapRateTerm
1596 Payments on undated deeply subordinated securities Concept (Monetary) For Period Credit tef:PaymentsofCouponRelatedtoUndatedDeeplySubordinatedDebtNetofTax
1597 Premium of tender offer Concept (Monetary) As Of Credit tef:PremiumofTenderOfferofEquityInstrument
1598 Issuance of convertible notes Concept (Monetary) For Period Credit ifrs-full:IssueOfConvertibleInstruments
1599 Convertible notes, interest rate Concept (Percent) For Period tef:IssueOfConvertibleInstrumentsApplicableRate
1600 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1601 Convertible notes conversion price (EUR per share) Concept (Share) For Period tef:IssueOfConvertibleInstrumentsConversionPrice
1602 Payments of coupons Concept (Monetary) For Period Credit ifrs-full:PaymentsOfOtherEquityInstruments
1603 2415405 - Disclosure - Equity - Legal Reserve (Details) Network

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 http://www.telefonica.com/role/EquityLegalReserveDetails
1604 Implied Table Table

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*

 implied:Table
1605 Share Capital, Reserves And Other Equity Interest [Abstract] Abstract tef:ShareCapitalReservesAndOtherEquityInterestAbstract
1606 Legal reserve, including capital increase carried forward Concept (Monetary) As Of Credit tef:OtherReserveIncludingCapitalIncreaseCarriedForward
1607 Legal reserve Concept (Monetary) As Of Credit ifrs-full:StatutoryReserve
1608 2415406 - Disclosure - Equity - Retained Earnings (Details) Network

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*

 http://www.telefonica.com/role/EquityRetainedEarningsDetails
1609 Implied Table Table

*

*

 implied:Table
1610 Share Capital, Reserves And Other Equity Interest [Abstract] Abstract tef:ShareCapitalReservesAndOtherEquityInterestAbstract
1611 Increase (decrease) through appropriation of retained earnings Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings
1612 Revaluation reserve Concept (Monetary) As Of Credit ifrs-full:RevaluationSurplus
1613 Reserve for cancelled share capital Concept (Monetary) As Of Credit tef:CancelledShareCapitalReserve
1614 Capital redemption reserve Concept (Monetary) As Of Credit ifrs-full:CapitalRedemptionReserve
1615 2415407 - Disclosure - Equity - Translation Differences (Details) Network

*

*

 http://www.telefonica.com/role/EquityTranslationDifferencesDetails
1616 Disclosure of reserves within equity [table] Table

*

*

 ifrs-full:DisclosureOfReservesWithinEquityTable
1617 Currency Type [Axis] Axis tef:Currency1Axis
1618 All Currencies [Domain] Member currency:AllCurrenciesDomain
1619 Brazilian real Member currency:BRL
1620 Pound sterling Member currency:GBP
1621 Other currencies Member tef:OtherCurrenciesMember
1622 Disclosure of reserves within equity [line items] LineItems ifrs-full:DisclosureOfReservesWithinEquityLineItems
1623 Accumulated contribution of translation differences Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
1624 2415408 - Disclosure - Equity - Application of IFRS 9 and IFRS 15 (Details) Network

*

*

 http://www.telefonica.com/role/EquityApplicationOfIfrs9AndIfrs15Details
1625 Disclosure of reserves within equity [table] Table

*

*

 ifrs-full:DisclosureOfReservesWithinEquityTable
1626 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
1627 New IFRSs [member] Member ifrs-full:NewIFRSsMember
1628 Total Member tef:IFRS9andIFRS15Member
1629 IFRS 9 Member tef:IFRS9Member
1630 IFRS 15 Member tef:IFRS15Member
1631 Disclosure of reserves within equity [line items] LineItems ifrs-full:DisclosureOfReservesWithinEquityLineItems
1632 Gross impact on equity Concept (Monetary) As Of Credit tef:GrossAdjustmentonInitialApplicationofNewReporting
1633 Tax effect Concept (Monetary) As Of Debit tef:AdjustmentonInitialApplicationofNewReportingTax
1634 Impact on equity Concept (Monetary) As Of Credit tef:AdjustmentonInitialApplicationofNewReportingAfterTax
1635 Attributable to equity holders Concept (Monetary) As Of Credit tef:AdjustmentonInitialApplicationofNewReportingAfterTaxPortionAttributabletoEquityHolders
1636 Attributable to non-controlling interest Concept (Monetary) As Of Credit tef:AdjustmentonInitialApplicationofNewReportingAfterTaxPortionAttributabletoNoncontrollingInterest
1637 2415409 - Disclosure - Equity - Treasury Share Instruments (Details) Network

*

*

 http://www.telefonica.com/role/EquityTreasuryShareInstrumentsDetails
1638 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1639 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1640 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1641 Ordinary shares Member ifrs-full:OrdinarySharesMember
1642 Legal Entity [Axis] Axis dei:LegalEntityAxis
1643 Entity [Domain] Member dei:EntityDomain
1644 Telefónica Germany Member tef:TelefonicaGermanyMember
1645 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1646 Equity [member] Member ifrs-full:EquityMember
1647 Treasury shares Member ifrs-full:TreasurySharesMember
1648 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1649 Number of shares Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1650 Acquisition price (EUR per share) Concept (Share) As Of tef:TreasuryShareAcquisitionPrice
1651 Trading price (EUR per share) Concept (Share) As Of tef:TreasuryShareTradingPrice
1652 Market value() Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
1653 Percent of total shares classified as treasury shares Concept (Percent) As Of tef:TreasurySharesAsAPercentofTotalShares
1654 Treasury shares, beginning balance Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1655 Acquisitions (shares) Concept (Shares) For Period tef:CommonSharesAcquired
1656 Employee share option plan (shares) Concept (Shares) For Period tef:NumberOfShareAwardsInShareBasedPaymentArrangements
1657 Capital reduction and other movements Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1658 Treasury shares, ending balance Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1659 Purchase of treasury shares Concept (Monetary) For Period Debit ifrs-full:PurchaseOfTreasuryShares
1660 Proportion of share capital acquired (as a percent) Concept (Percent) As Of tef:PercentageOfShareCapitalAcquired
1661 Proceeds from sale of treasury shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSaleOrIssueOfTreasuryShares
1662 Reduction of share capital (in shares) Concept (Monetary) For Period Debit ifrs-full:ReductionOfIssuedCapital
1663 Derivative financial instrument notional shares equivalent Concept (Shares) For Period tef:DerivativeFinancialInstrumentSharesEquivalent
1664 2415410 - Disclosure - Equity - Equity Attributable to Non-Controlling Interests (Details) Network

*

*

 http://www.telefonica.com/role/EquityEquityAttributableToNonControllingInterestsDetails
1665 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1666 Legal Entity [Axis] Axis dei:LegalEntityAxis
1667 Entity [Domain] Member dei:EntityDomain
1668 Telefonica, S.A. Member tef:TelefonicaS.A.Member
1669 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1670 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1671 Telefónica Brazil Member tef:TelefonicaBrazilMember
1672 Telefónica Deutschland Holding, A.G. Member tef:TelefonicaDeutschlandHoldingMember
1673 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
1674 Telefónica Centroamericana Inversiones, S.L. Member tef:TelefonicaCentroamericanaInversionesMember
1675 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
1676 Other Member tef:OTHERMember
1677 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1678 Beginning balance Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1679 Sales of non-controlling interests and inclusion of companies Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughDisposalOfSubsidiary
1680 Acquisitions of non-controlling interests and exclusion of companies Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughAcquisitionOfSubsidiary
1681 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterests
1682 Profit/(loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1683 Change in translation differences Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughChangeInTranslationDifferencesEquity
1684 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
1685 Ending balance Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1686 2415411 - Disclosure - Equity - Financial Position Disclosures (Details) Network

*

*

 http://www.telefonica.com/role/EquityFinancialPositionDisclosuresDetails
1687 Entities [Table] Table

*

*

 dei:EntitiesTable
1688 Legal Entity [Axis] Axis dei:LegalEntityAxis
1689 Entity [Domain] Member dei:EntityDomain
1690 Colombia Telecomunicaciones, S.A, ESP Member tef:ColombiaTelecomunicacionesS.A.ESPMember
1691 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
1692 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
1693 OIBDA Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
1694 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
1695 Operating income Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
1696 Capital expenditures (CapEx) Concept (Monetary) For Period Credit ifrs-full:PaymentsForDevelopmentProjectExpenditure
1697 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1698 Total allocated assets Concept (Monetary) As Of Debit ifrs-full:Assets
1699 Total allocated liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1700 2415412 - Disclosure - Equity - Cash Flow Disclosures (Details) Network

*

*

 http://www.telefonica.com/role/EquityCashFlowDisclosuresDetails
1701 Entities [Table] Table

*

*

 dei:EntitiesTable
1702 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1703 Equity [member] Member ifrs-full:EquityMember
1704 Treasury shares Member ifrs-full:TreasurySharesMember
1705 Legal Entity [Axis] Axis dei:LegalEntityAxis
1706 Entity [Domain] Member dei:EntityDomain
1707 Colombia Telecomunicaciones, S.A, ESP Member tef:ColombiaTelecomunicacionesS.A.ESPMember
1708 Telefónica Brazil Member tef:TelefonicaBrazilMember
1709 Telefónica Germany Member tef:TelefonicaGermanyMember
1710 Pontel Participaciones, SL Member tef:PontelParticipacionesSLMember
1711 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
1712 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
1713 Net cash flow provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
1714 Net cash flow used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
1715 Net cash flow used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
1716 Net increase (decrease) in cash and cash equivalents during the year Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
1717 Percentage of share capital sold Concept (Percent) As Of tef:PercentageofShareCapitalSold
1718 Proceeds from sales of interests in associates Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfInterestsInAssociates
1719 Proportion of indirect participation (as a percent) Concept (Percent) For Period tef:Indirectparticipationpercentage
1720 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1721 Percent of total shares classified as treasury shares Concept (Percent) As Of tef:TreasurySharesAsAPercentofTotalShares
1722 Acquisitions (shares) Concept (Shares) For Period tef:CommonSharesAcquired
1723 Proportion of share capital acquired (as a percent) Concept (Percent) As Of tef:PercentageOfShareCapitalAcquired
1724 2417402 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Exchange Rate Risk (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesExchangeRateRiskDetails
1725 Disclosure of detailed information about hedging instruments [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable
1726 Currency Type [Axis] Axis tef:Currency1Axis
1727 All Currencies [Domain] Member currency:AllCurrenciesDomain
1728 Latin American currencies Member tef:LatinAmericanCurrenciesMember
1729 USD Member currency:USD
1730 GBP Member currency:GBP
1731 VEB Member currency:VEF
1732 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1733 Risks [member] Member ifrs-full:TypesOfRisksMember
1734 Foreign currency exchange risk Member ifrs-full:CurrencyRiskMember
1735 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1736 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1737 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1738 Disclosure of detailed information about hedging instruments [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems
1739 Net debt held as a hedging instrument Concept (Monetary) As Of Credit ifrs-full:HedgingInstrumentLiabilities
1740 Ratio of debt to OBIDA Concept (Pure) As Of tef:RatioOfDebtToOperatingIncomeBeforeDepreciationAndAmortization
1741 Foreign exchange gain (loss) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
1742 Foreign exchange rate Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
1743 Increase in financial income due to the effect of monetary correction for inflation Concept (Monetary) For Period Credit tef:IncreaseInIncomeDueToEffectOfInflationCorrection
1744 2417402 - Disclosure - Financial Liabilities - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/FinancialLiabilitiesNarrativeDetails
1745 Disclosure of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfFinancialLiabilitiesTable
1746 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1747 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1748 Commercial Paper Member tef:CommercialPaperMember
1749 Loans and other payables Member tef:LoansAndOtherPayablesMember
1750 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1751 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1752 Brazil, Panama, Ecuador and Guatemala Member tef:BrazilPanamaEcuadorAndGuatemalaMember
1753 Maturity [axis] Axis ifrs-full:MaturityAxis
1754 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1755 2019 Member ifrs-full:NotLaterThanOneYearMember
1756 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1757 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1758 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1759 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1760 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
1761 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1762 Interest payable Concept (Monetary) As Of Credit ifrs-full:InterestPayable
1763 Fair value of current financial liabilities Concept (Monetary) As Of Credit tef:CurrentFinancialLiabilitiesAtFairValue
1764 Fair value of non-current liabilities Concept (Monetary) As Of Credit tef:NoncurrentFinancialLiabilitiesAtFairValue
1765 Pending payment amount from undiscounted cash flows of loans and other payables Concept (Monetary) As Of Credit tef:TradeAndOtherPayablesUndiscountedCashFlowsPendingPayment
1766 Payments made from undiscounted cash flows of loans and other payables Concept (Monetary) For Period Credit tef:TradeAndOtherPayablesUndiscountedCashFlowsPaymentMade
1767 Proportion of gross debt (as a percent) Concept (Percent) As Of tef:ProportionOfGrossDebt
1768 Debentures and bonds issued Concept (Monetary) As Of Credit ifrs-full:BondsIssued
1769 Commercial papers issuable Concept (Monetary) As Of Credit tef:Commercialpapersissuable
1770 Commercial papers issued Concept (Monetary) As Of Credit ifrs-full:CommercialPapersIssued
1771 Average interest rate (as a percent) Concept (Percent) For Period tef:BorrowingsAverageInterestRate
1772 Promissory notes issuable Concept (Monetary) As Of Credit tef:Promissorynotesissuable
1773 Promissory notes issuable, allowed increase Concept (Monetary) As Of Credit tef:Promissorynotesissuableallowedincrease
1774 Promissory notes issued Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
1775 Available financing capacity Concept (Monetary) As Of Credit tef:BorrowingsRemainingBorrowingCapacity
1776 Borrowings maturing in more than twelve months Concept (Monetary) As Of Credit tef:BorrowingsMaturinginmorethanTwelveMonths
1777 2417403 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Sensitivity of Foreign Currency Gains and Losses and of Equity Changes in Exchange Rates (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesSensitivityOfForeignCurrencyGainsAndLossesAndOfEquityChangesInExchangeRatesDetails
1778 Sensitivity Analysis Of Changes In Foreign Currency Exchange Rates [Table] Table

*

*

 tef:SensitivityAnalysisOfChangesInForeignCurrencyExchangeRatesTable
1779 Currency Type [Axis] Axis tef:Currency1Axis
1780 All Currencies [Domain] Member currency:AllCurrenciesDomain
1781 All currencies vs EUR Member tef:AllCurrenciesVs.EURMember
1782 USD Member tef:USDvs.EURMember
1783 European currencies vs EUR Member tef:EuropeanCurrenciesVs.EURMember
1784 Latin American currencies vs USD Member tef:LatinAmericanCurrenciesVs.EURMember
1785 Sensitivity Analysis Of Changes In Foreign Currency Exchange Rates [Line Items] LineItems tef:SensitivityAnalysisOfChangesInForeignCurrencyExchangeRatesLineItems
1786 Change Abstract tef:SensitivityAnalysisChangeInForeignExchangeRateAbstract
1787 Increase in exchange rate Concept (Percent) For Period tef:SensitivityAnalysisIncreaseInExchangeRate
1788 Decrease in exchange rate Concept (Percent) For Period tef:SensitivityAnalysisDecreaseInExchangeRate
1789 Impact on the consolidated income statement Abstract tef:SensitivityAnalysisChangeInExchangeRateImpactOnNetIncomeAbstract
1790 Increase in net income Concept (Monetary) For Period Credit tef:SensitivityAnalysisChangeInForeignExchangeRateIncreaseInNetIncome
1791 Decrease in net income Concept (Monetary) For Period Debit tef:SensitivityAnalysisChangeInForeignExchangeRateDecreaseInNetIncome
1792 Impact on consolidated equity Abstract tef:SensitivityAnalysisChangeInExchangeRateImpactOnConsolidatedEquityAbstract
1793 Decrease in consolidated equity Concept (Monetary) For Period Debit tef:SensitivityAnalysisChangeInExchangeRateDecreaseInConsolidatedEquity
1794 Increase in consolidated equity Concept (Monetary) For Period Credit tef:SensitivityAnalysisChangeInExchangeRateIncreaseInConsolidatedEquity
1795 2417403 - Disclosure - Financial Liabilities - Maturity Analysis of Financial Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/FinancialLiabilitiesMaturityAnalysisOfFinancialLiabilitiesDetails
1796 Disclosure of maturity analysis for non-derivative financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
1797 Legal Entity [Axis] Axis dei:LegalEntityAxis
1798 Entity [Domain] Member dei:EntityDomain
1799 Telefonica, S.A. Member tef:TelefonicaS.A.Member
1800 Maturity [axis] Axis ifrs-full:MaturityAxis
1801 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1802 2019 Member ifrs-full:NotLaterThanOneYearMember
1803 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1804 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1805 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1806 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1807 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
1808 Non-current Member ifrs-full:LaterThanOneYearMember
1809 Disclosure of maturity analysis for non-derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
1810 Debentures and bonds Concept (Monetary) As Of Credit ifrs-full:BondsIssuedUndiscountedCashFlows
1811 Promissory notes & commercial paper Concept (Monetary) As Of Credit ifrs-full:BankBorrowingsUndiscountedCashFlows
1812 Total Issues Concept (Monetary) As Of Credit ifrs-full:Borrowings
1813 Loans and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows
1814 Derivative instruments (Note 16) Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
1815 Total Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1816 2417404 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Interest Rate Risk (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesInterestRateRiskDetails
1817 Implied Table Table

*

*

 implied:Table
1818 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
1819 Percentage of net debt plus commitments pegged to fixed interest rates for a period greater than one year Concept (Percent) As Of tef:PercentageOfNetDebtPlusCommitmentsUnderFixedInterestRates
1820 Percentage of net debt at floating rates or at fixed rates maturing in under one year Concept (Percent) As Of tef:PercentageOfNetDebtAtFloatingRatesOrFixedRatesLessThanOneYear
1821 Percentage of net debt at floating rates or at fixed rates maturing in under one year with collared interest rates over one year Concept (Percent) As Of tef:PercentageOfNetDebtAtFloatingRatesOrFixedRatesMaturingInLessThanOneYearCollaredInAPeriodOverOneYear
1822 Net financial results Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
1823 Increase (decrease) in net financial results from prior year Concept (Monetary) For Period Credit tef:IncreaseDecreaseinFinanceIncomeCostfromPriorYear
1824 Percent decrease in net financial results Concept (Percent) For Period tef:PercentageOfIncreaseDecreaseInFinanceIncomeSincePreviousYear
1825 2417404 - Disclosure - Financial Liabilities - Breakdown of Financial Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/FinancialLiabilitiesBreakdownOfFinancialLiabilitiesDetails
1826 Disclosure of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfFinancialLiabilitiesTable
1827 Legal Entity [Axis] Axis dei:LegalEntityAxis
1828 Entity [Domain] Member dei:EntityDomain
1829 Telefonica, S.A. Member tef:TelefonicaS.A.Member
1830 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1831 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1832 Issues Member tef:DebtIssuancesMember
1833 Loans and other payables Member tef:LoansAndOtherPayablesMember
1834 Derivative instruments Member ifrs-full:DerivativesMember
1835 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1836 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
1837 Fair value through profit or loss, Held for trading Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossThatMeetDefinitionOfHeldForTradingCategoryMember
1838 Fair value through profit or loss, Fair value option Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
1839 Hedges Member tef:FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1840 Liabilities at amortized cost Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
1841 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1842 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1843 Level 1 (Quoted prices) Member ifrs-full:Level1OfFairValueHierarchyMember
1844 Level 2 (Other directly observable market inputs) Member ifrs-full:Level2OfFairValueHierarchyMember
1845 Level 3 (Inputs not based on observable market data) Member ifrs-full:Level3OfFairValueHierarchyMember
1846 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1847 Total carrying amount Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1848 Total fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1849 2417405 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Sensitivity Analysis Due to Fluctuations in Interest Rates (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesSensitivityAnalysisDueToFluctuationsInInterestRatesDetails
1850 Implied Table Table

*

*

 implied:Table
1851 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
1852 Change in interest rate Abstract tef:SensitivityAnalysisChangeInInterestRateAbstract
1853 Increase in interest rate Concept (Percent) For Period tef:SensitivityAnalysisPercentageIncreaseInInterestRate
1854 Decrease in interest rate Concept (Percent) For Period tef:SensitivityAnalysisPercentageDecreaseInInterestRate
1855 Impact on consolidated income statement Abstract tef:SensitivityAnalysisImpactOnNetIncomeDueToChangesInInterestRateAbstract
1856 Decrease in consolidated income Concept (Monetary) For Period Debit tef:SensitivityAnalysisDecreaseInNetIncomeDueToIncreaseInInterestRate
1857 Increase in consolidated income Concept (Monetary) For Period Credit tef:SensitivityAnalysisIncreaseInNetIncomeDueToDecreaseInInterestRate
1858 Impact on consolidated equity Abstract tef:SensitivityAnalysisImpactOnEquityDueToChangesInInterestRateAbstract
1859 Increase in consolidated equity Concept (Monetary) For Period Credit tef:SensitivityAnalysisIncreaseInEquityDueToIncreaseInInterestRate
1860 Decrease in consolidated equity Concept (Monetary) For Period Debit tef:SensitivityAnalysisDecreaseInEquityDueToDecreaseInInterestRate
1861 2417405 - Disclosure - Financial Liabilities - Schedule of Change in Financial Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/FinancialLiabilitiesScheduleOfChangeInFinancialLiabilitiesDetails
1862 Disclosure of offsetting of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesTable
1863 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1864 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1865 Issues Member tef:DebtIssuancesMember
1866 Promissory notes and commercial paper Member tef:PromissoryNotesAndCommercialPaperMember
1867 Loans and other payables Member tef:InterestBearingDebtMember
1868 Derivative instruments Member ifrs-full:DerivativesMember
1869 Disclosure of offsetting of financial liabilities [line items] LineItems ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesLineItems
1870 Financial liabilities, beginning balance Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1871 Acquisitions Concept (Monetary) For Period Credit tef:AcquisitionsofFinancialLiabilities
1872 Disposals Concept (Monetary) For Period Credit tef:DisposalsofFinancialLiabilities
1873 Translation differences Concept (Monetary) For Period Credit tef:TranslationDifferencesofFinancialLiabilities
1874 Fair value adjustment and financial updates Concept (Monetary) For Period Credit tef:FairValueAdjustmentsandFinancialUpdatesofFinancialLiabilities
1875 Others movements Concept (Monetary) For Period Credit tef:Increasedecreasethroughothermovementsfinancialliabilities
1876 Financial liabilities, ending balance Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1877 2417406 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Liquidity Risk (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesLiquidityRiskDetails
1878 Disclosure of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfFinancialLiabilitiesTable
1879 Range [axis] Axis ifrs-full:RangeAxis
1880 Ranges [member] Member ifrs-full:RangesMember
1881 Minimum Member ifrs-full:BottomOfRangeMember
1882 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1883 Average maturity of net financial debt Concept (xbrli:durationItemType) For Period tef:AverageMaturityOfNetFinancialDebt
1884 Period to pay all commitments Concept (xbrli:durationItemType) For Period tef:PeriodtoPayAllCommitments
1885 Net debt held as a hedging instrument Concept (Monetary) As Of Credit ifrs-full:HedgingInstrumentLiabilities
1886 Gross debt held as a hedging instrument, current maturities Concept (Monetary) As Of Credit tef:HedgingInstrumentCurrentLiabilities
1887 Non-current financial liabilities Concept (Monetary) As Of Credit tef:HedgingInstrumentNonCurrentLiabilities
1888 2417406 - Disclosure - Financial Liabilities - Interest-Bearing Debt (Details) Network

*

*

 http://www.telefonica.com/role/FinancialLiabilitiesInterestBearingDebtDetails
1889 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1890 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1891 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1892 Syndicated Facility Due March 15, 2023 Member tef:SyndicatedFacilityDueMarch152023Member
1893 Bilateral Loan due January 30, 2026 Member tef:BilateralLoanDueJanuary302026Member
1894 Bilateral loan due June 26, 2019 Member tef:BilateralLoanDueJune262019Member
1895 Structured financing due November 28, 2024 Member tef:StructuredFinancingDueNovember282024Member
1896 Bilateral Loan due October 22, 2020 Member tef:BilateralLoanDueOctober222020Member
1897 Bilateral Loan due July 22, 2019 Member tef:BilateralLoanDueJuly222019Member
1898 Bilateral Loan due September 28, 2018 Member tef:BilateralLoanDueSeptember282018Member
1899 Syndicated Facility due December 01, 2023 Member tef:SyndicatedFacilitydueDecember012023Member
1900 Syndicated facility due February 18, 2021 Member tef:SyndicatedFacilityDueFebruary182021Member
1901 Syndicated facility due February 19, 2022 Member tef:SyndicatedFacilityDueFebruary192022Member
1902 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1903 Contractual limit amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1904 Outstanding balance Concept (Monetary) As Of Credit ifrs-full:Borrowings
1905 Drawndown Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
1906 Repayments of loans, borrowings and promissory notes Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1907 Early cancellation of debt Concept (Monetary) As Of Debit tef:EarlyCancellationofDebt
1908 Early repayment of debt Concept (Monetary) As Of Debit tef:EarlyRepaymentofDebt
1909 Maturity extension period on borrowings Concept (xbrli:durationItemType) For Period tef:BorrowingsMaturityExtension
1910 2417407 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Country Risk (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesCountryRiskDetails
1911 Disclosure of financial liabilities [table] Table

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 ifrs-full:DisclosureOfFinancialLiabilitiesTable
1912 Segments [axis] Axis ifrs-full:SegmentsAxis
1913 Segments [member] Member ifrs-full:SegmentsMember
1914 Telefónica Hispam Norte Member tef:TelefonicaHispanoamericaMember
1915 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1916 Borrowings Concept (Monetary) As Of Credit ifrs-full:HedgingInstrumentLiabilities
1917 Percentage of net financial debt held Concept (Percent) As Of tef:PercentageOfNetFinancialDebtHeld
1918 Net repatriation of funds to Spain Concept (Monetary) For Period Debit tef:NetRepatriationOfFunds
1919 Net repatriation of funds from dividends received Concept (Monetary) For Period Debit tef:NetRepatriationOfFundsDividends
1920 Net repatriation of funds from other items Concept (Monetary) For Period Credit tef:NetRepatriationOfFundsOther
1921 2417407 - Disclosure - Financial Liabilities - Loans by Currency (Details) Network

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*

 http://www.telefonica.com/role/FinancialLiabilitiesLoansByCurrencyDetails
1922 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1923 Currency Type [Axis] Axis tef:Currency1Axis
1924 All Currencies [Domain] Member currency:AllCurrenciesDomain
1925 Euro Member currency:EUR
1926 US dollar Member currency:USD
1927 Brazilian real Member currency:BRL
1928 Colombian Peso Member currency:COP
1929 Pound sterling Member currency:GBP
1930 Peruvian nuevo sol Member currency:PEN
1931 Other currencies Member tef:OtherCurrenciesMember
1932 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1933 Loans and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows
1934 2417408 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Credit Risk (Details) Network

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*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesCreditRiskDetails
1935 Implied Table Table

*

*

 implied:Table
1936 Financial Instruments [Abstract] Abstract tef:FinancialInstrumentsAbstract
1937 Exposure to credit risk on guarantees Concept (Monetary) As Of Credit ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
1938 2417409 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Derivatives Policy (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesDerivativesPolicyDetails
1939 Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [table] Table

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*

 ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsTable
1940 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1941 Risks [member] Member ifrs-full:TypesOfRisksMember
1942 Interest rate risk Member ifrs-full:InterestRateRiskMember
1943 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1944 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1945 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1946 Range [axis] Axis ifrs-full:RangeAxis
1947 Ranges [member] Member ifrs-full:RangesMember
1948 Minimum Member ifrs-full:BottomOfRangeMember
1949 Maximum Member ifrs-full:TopOfRangeMember
1950 Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] LineItems ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsLineItems
1951 Average interest rate (as a percent) Concept (Percent) As Of ifrs-full:AverageRateOfHedgingInstrument
1952 2417410 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Breakdown of Financial Results (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesBreakdownOfFinancialResultsDetails
1953 Disclosure of financial assets [table] Table

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*

 ifrs-full:DisclosureOfFinancialAssetsTable
1954 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1955 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1956 Derivative instruments Member ifrs-full:DerivativesMember
1957 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1958 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1959 Telefónica Brazil Member tef:TelefonicaBrazilMember
1960 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1961 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
1962 Dividends received Concept (Monetary) For Period Credit ifrs-full:RevenueFromDividends
1963 Other financial income Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
1964 Total Concept (Monetary) For Period Credit ifrs-full:Revenue
1965 Changes in fair value of asset derivatives at fair value through profit or loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
1966 Changes in fair value of liability derivatives at fair value through profit or loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialLiabilitiesAtFairValueThroughProfitOrLoss
1967 Changes in the fair value of debt instruments and other assets at fair value to profit or loss Concept (Monetary) For Period Credit tef:Gainslossesondebtinstrumentsandotherassetsatfairvaluethroughprofitorloss
1968 Transfer from equity of results of cash flow hedges - future cash flows that are not longer expected to happen Concept (Monetary) For Period Debit tef:TransferFromEquityToProfitAndLossFromCashFlowHedgesNotExpectedtoHappen
1969 Transfer from equity to profit and loss from available-for-sale assets and others Concept (Monetary) For Period Debit tef:TransferFromEquityToProfitAndLossFromAvailableForSaleAssetsAndOthers
1970 (Loss)/Gain on fair value hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnHedgingInstrument
1971 Gain/(loss) on adjustment to items hedged by fair value hedges Concept (Monetary) For Period Credit tef:GainsLossesOnAdjustmentsToItemsHedgedByFairValueHedges
1972 Subtotal Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
1973 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1974 Ineffective portion of cash flow hedges Concept (Monetary) For Period Credit ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss
1975 Accretion of provisions and other liabilities Concept (Monetary) For Period Debit tef:AccretionOfProvisionsAndOtherLiabilities
1976 Other financial expenses Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
1977 Subtotal Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
1978 Net finance costs excluding foreign exchange differences and hyperinflation adjustments Concept (Monetary) For Period Credit tef:FinanceIncomeCostExcludingForeignExchangeDifferencesAndHyperinflationaryAdjustments
1979 Hedging gains (losses) for hedge of group of items with offsetting risk positions Concept (Monetary) For Period Credit ifrs-full:HedgingGainsLossesForHedgeOfGroupOfItemsWithOffsettingRiskPositions
1980 Transfer from equity of results of cash flow hedges Concept (Monetary) For Period Credit tef:TransferFromEquityToProfitAndLossFromCashFlowHedges
1981 2417411 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Evolution of Derivative Instruments (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesEvolutionOfDerivativeInstrumentsDetails
1982 Disclosure of detailed information about hedges [table] Table

*

*

 ifrs-full:DisclosureOfHedgeAccountingTable
1983 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1984 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1985 Derivative instruments Member ifrs-full:DerivativesMember
1986 Disclosure of detailed information about hedges [line items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1987 Derivative Assets/ Liabilities, Net [Roll Forward] Abstract tef:DerivativeAssetsLiabilitiesNetRollForward
1988 Opening balance of assets/(liabilities) Concept (Monetary) As Of Debit tef:DerivativeAssetLiabilityNet
1989 Financing payments Concept (Monetary) For Period Debit tef:FinancingPaymentsofFinancialInstruments
1990 Financing proceeds Concept (Monetary) For Period Credit tef:FinancingProceedsofFinancialInstruments
1991 Interest (proceeds)/payments Concept (Monetary) For Period Debit tef:InterestProceedsPaymentsofFinancialInstruments
1992 Other (proceeds)/payments Concept (Monetary) For Period Debit tef:OtherProceedsPaymentsofFinancialInstruments
1993 Fair value adjustments through other comprehensive income Concept (Monetary) For Period Debit tef:FairValueAdjustmentsThroughOtherComprehensiveIncomeofFinancialInstruments
1994 Movements with counterparty in the income statement Concept (Monetary) For Period Debit tef:Increasedecreasethroughmovementswithcounterpartyfinancialinstruments
1995 Translation differences Concept (Monetary) For Period Debit tef:Increasedecreasethroughtranslationdifferencesfinancialinstruments
1996 Other movements Concept (Monetary) For Period Debit tef:Increasedecreasethroughothermovementsfinancialinstruments
1997 Closing balance of assets/(liabilities) Concept (Monetary) As Of Debit tef:DerivativeAssetLiabilityNet
1998 Increase (decrease) in financial assets Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInFinancialAssets
1999 Outstanding invoices Concept (Monetary) As Of Credit tef:OutstandingInvoicesFromSuppliers
2000 2417412 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Breakdown of Derivatives and Expected Maturity Schedule (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesBreakdownOfDerivativesAndExpectedMaturityScheduleDetails
2001 Disclosure of detailed information about hedges [table] Table

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*

 ifrs-full:DisclosureOfHedgeAccountingTable
2002 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
2003 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
2004 Loans and Other Debts Member tef:LoansandOtherDebtsMember
2005 Obligations and Bonds Member tef:ObligationsandBondsMember
2006 Legal Entity [Axis] Axis dei:LegalEntityAxis
2007 Entity [Domain] Member dei:EntityDomain
2008 Telefonica Group Member tef:TelefonicaGroupMember
2009 Hedging Designation [Axis] Axis tef:HedgingDesignation1Axis
2010 Hedging Designation [Domain] Member tef:HedgingDesignation1Domain
2011 Designated as Hedging Instrument Member tef:DesignatedasHedgingInstrument1Member
2012 Not Designated as Hedging Instrument Member tef:NotDesignatedasHedgingInstrument1Member
2013 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2014 Risks [member] Member ifrs-full:TypesOfRisksMember
2015 Interest rate hedges Member ifrs-full:InterestRateRiskMember
2016 Exchange rate hedges Member ifrs-full:CurrencyRiskMember
2017 Interest and exchange rate hedges Member tef:InterestRateAndCurrencyRiskMember
2018 Others Member tef:OtherRisksMember
2019 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
2020 Hedges [member] Member ifrs-full:TypesOfHedgesMember
2021 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
2022 Fair value hedges Member ifrs-full:FairValueHedgesMember
2023 Net investment Hedges Member ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember
2024 Currency swaps Member ifrs-full:CurrencySwapContractMember
2025 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2026 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2027 Derivative instruments Member ifrs-full:DerivativesMember
2028 Financial Instruments excluding Derivatives Member tef:FinancialInstrumentsExcludingDerivativesMember
2029 Maturity [axis] Axis ifrs-full:MaturityAxis
2030 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2031 Within one year Member ifrs-full:NotLaterThanOneYearMember
2032 Two years Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2033 Three years Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2034 Subsequent years Member ifrs-full:LaterThanThreeYearsMember
2035 Disclosure of detailed information about hedges [line items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
2036 Fair value Concept (Monetary) As Of ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
2037 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
2038 Fair value Concept (Monetary) As Of Debit tef:FinancialAssetsLiabilitiesAtFairValue
2039 Non-current derivative financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
2040 Current derivative financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
2041 Non-current derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
2042 Current derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
2043 Derivative asset (liability), net Concept (Monetary) As Of Debit tef:DerivativeAssetLiabilityNet
2044 Gain (loss) on derivative Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
2045 2417413 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Details about Hedged Items by Fair Value Hedges (Details) Network

*

*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesDetailsAboutHedgedItemsByFairValueHedgesDetails
2046 Disclosure of detailed information about hedged items [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsTable
2047 Hedged items [axis] Axis ifrs-full:HedgedItemsAxis
2048 Hedged items [member] Member ifrs-full:HedgedItemsMember
2049 Hedged Items that have Ceased to be Adjusted for Gains and Losses Member tef:HedgedItemsthathaveCeasedtobeAdjustedforGainsandLossesMember
2050 Hedging Designation [Axis] Axis tef:HedgingDesignation1Axis
2051 Hedging Designation [Domain] Member tef:HedgingDesignation1Domain
2052 Designated as Hedging Instrument Member tef:DesignatedasHedgingInstrument1Member
2053 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2054 Risks [member] Member ifrs-full:TypesOfRisksMember
2055 Interest rate risk Member ifrs-full:InterestRateRiskMember
2056 Exchange rate risk Member ifrs-full:CurrencyRiskMember
2057 Interest rate and exchange rate risk Member tef:InterestRateAndCurrencyRiskMember
2058 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
2059 Hedges [member] Member ifrs-full:TypesOfHedgesMember
2060 Fair value hedges Member ifrs-full:FairValueHedgesMember
2061 Disclosure of detailed information about hedged items [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsLineItems
2062 Total allocated assets Concept (Monetary) As Of Debit ifrs-full:Assets
2063 Financial assets and other non-current assets Concept (Monetary) As Of Debit tef:NonCurrentFinancialAssetsAndOtherNonCurrentAssets
2064 Receivables and other current assets Concept (Monetary) As Of Debit tef:CurrentReceivablesAndOtherCurrentAssets
2065 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
2066 Total allocated liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
2067 Non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
2068 Payables and other non-current liabilities Concept (Monetary) As Of Credit tef:NoncurrentPayablesAndOtherNoncurrentLiabilities
2069 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
2070 Payables and other-current liabilities Concept (Monetary) As Of Credit tef:CurrentPayablesAndOtherCurrentLiabilities
2071 2417414 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Evolution of Hedges in Equity (Details) Network

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*

 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesEvolutionOfHedgesInEquityDetails
2072 Disclosure of detailed information about hedging instruments [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable
2073 Income Statement Location [Axis] Axis tef:IncomeStatementLocationAxis
2074 Income Statement Location [Domain] Member tef:IncomeStatementLocationDomain
2075 Interest Expense Member tef:InterestExpenseMember
2076 Hedging in Equity [Axis] Axis tef:HedginginEquityAxis
2077 Hedging in Equity [Domain] Member tef:HedginginEquityDomain
2078 Total gross amount Member tef:GrossAmountMember
2079 Tax effect Member tef:TaxEffectMember
2080 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2081 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2082 Derivative instruments Member ifrs-full:DerivativesMember
2083 Financial Instruments excluding Derivatives Member tef:FinancialInstrumentsExcludingDerivativesMember
2084 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2085 Risks [member] Member ifrs-full:TypesOfRisksMember
2086 Interest rate risk Member ifrs-full:InterestRateRiskMember
2087 Exchange rate risk Member ifrs-full:CurrencyRiskMember
2088 Interest rate and exchange rate risk Member tef:InterestRateAndCurrencyRiskMember
2089 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
2090 Hedges [member] Member ifrs-full:TypesOfHedgesMember
2091 Net investment Hedges Member ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember
2092 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
2093 Disclosure of detailed information about hedging instruments [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems
2094 Changes in Hedges in Equity [Roll Forward] Abstract tef:ChangesinHedgesinEquityRollForward
2095 Balance of hedges in equity at beginning of period Concept (Monetary) As Of Credit tef:HedgesinEquity
2096 Changes in the fair value registered in equity Concept (Monetary) For Period Credit tef:HedgesinEquityIncreaseDecreaseinFairValue
2097 Transfer to the initial value of hedged item Concept (Monetary) For Period Credit tef:HedgesinEquityIncreaseDecreasefromTransfertoInitialValue
2098 Transfer to the income statement of the period - the hedged future cash flows are no longer expected to happen Concept (Monetary) For Period Credit tef:HedgesinEquityIncreaseDecreasefromTransfertoIncomeStatementNoLongerExpected
2099 Transfer to the income statement of the period - the hedged item has affected profit or loss Concept (Monetary) For Period Credit tef:HedgesinEquityIncreaseDecreasefromTransfertoIncomeStatementAffectedProfitorLoss
2100 Total translation differences Concept (Monetary) For Period Credit tef:HedgesinEquityIncreaseDecreasefromTranslationDifferences
2101 Balance of hedges in equity at end of period Concept (Monetary) As Of Credit tef:HedgesinEquity
2102 Amounts remaining in equity for continuing hedges Concept (Monetary) As Of Credit tef:HedgesinEquityContinuingHedges
2103 Amounts remaining in equity from any hedging relationship for which hedge accounting is no longer applied Concept (Monetary) As Of Credit tef:HedgesinEquityHedgingNoLongerNeeded
2104 2417415 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Evolution of Cost of Hedges in Equity (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesEvolutionOfCostOfHedgesInEquityDetails
2105 Disclosure of detailed information about hedges [table] Table

*

*

 ifrs-full:DisclosureOfHedgeAccountingTable
2106 Hedging in Equity [Axis] Axis tef:HedginginEquityAxis
2107 Hedging in Equity [Domain] Member tef:HedginginEquityDomain
2108 Total gross amount Member tef:GrossAmountMember
2109 Tax effect Member tef:TaxEffectMember
2110 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2111 Risks [member] Member ifrs-full:TypesOfRisksMember
2112 Exchange rate risk Member ifrs-full:CurrencyRiskMember
2113 Disclosure of detailed information about hedges [line items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
2114 Changes in Cost of Hedging in Equity [Roll Forward] Abstract tef:ChangesinCostofHedginginEquityRollForward
2115 Balance of cost of hedging in equity at beginning of period Concept (Monetary) As Of Debit tef:Costofhedginginequity
2116 Changes in the fair value registered in equity Concept (Monetary) For Period Debit tef:IncreaseDecreaseinFairValueofCostofHedginginEquity
2117 Transfer to the income statement of the period - the hedged item has affected profit or loss Concept (Monetary) For Period Debit tef:IncreaseDecreaseinCostofHedginginEquityfromTransferstoIncomeStatement
2118 Balance of cost of hedging in equity at end of period Concept (Monetary) As Of Debit tef:Costofhedginginequity
2119 2417416 - Disclosure - Derivative Financial Instruments and Risk Management Policies - Ineffective Portion of Accounting Hedges (Details) Network

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 http://www.telefonica.com/role/DerivativeFinancialInstrumentsAndRiskManagementPoliciesIneffectivePortionOfAccountingHedgesDetails
2120 Disclosure of detailed information about hedges [table] Table

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*

 ifrs-full:DisclosureOfHedgeAccountingTable
2121 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2122 Risks [member] Member ifrs-full:TypesOfRisksMember
2123 Interest rate risk Member ifrs-full:InterestRateRiskMember
2124 Exchange rate risk Member ifrs-full:CurrencyRiskMember
2125 Interest rate and exchange rate risk Member tef:InterestRateAndCurrencyRiskMember
2126 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
2127 Hedges [member] Member ifrs-full:TypesOfHedgesMember
2128 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
2129 Fair value hedges Member ifrs-full:FairValueHedgesMember
2130 Net investment hedges Member ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember
2131 Disclosure of detailed information about hedges [line items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
2132 Changes in fair value of the hedging instrument Concept (Monetary) For Period Credit tef:Gainlossonchangeinfairvalueofhedginginstrument
2133 Changes in the fair value of hedges item for the hedged risk Concept (Monetary) For Period Credit tef:Gainlossonchangeinfairvalueofhedginginstrumenteffectiveportion
2134 Ineffective portion hedged registered in the income statement Concept (Monetary) For Period Credit ifrs-full:GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness
2135 2421402 - Disclosure - Payables and Other Non-current Liabilities - Composition of Trade and Other Payables (Details) Network

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 http://www.telefonica.com/role/PayablesAndOtherNonCurrentLiabilitiesCompositionOfTradeAndOtherPayablesDetails
2136 Implied Table Table

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*

 implied:Table
2137 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
2138 Payables Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
2139 Trade payables Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToTradeSuppliers
2140 Payables to suppliers of property, plant and equipment Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesForPurchaseOfNoncurrentAssets
2141 Debt for spectrum acquisition Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
2142 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
2143 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
2144 Contractual liabilities (Note 20) Concept (Monetary) As Of Credit ifrs-full:NoncurrentContractLiabilities
2145 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
2146 Current tax payables Concept (Monetary) As Of Credit tef:CurrentTaxPayables
2147 Total Concept (Monetary) As Of Credit tef:NoncurrentPayablesAndOtherNoncurrentLiabilities
2148 2421403 - Disclosure - Payables and Other Non-current Liabilities - Narrative (Details) Network

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 http://www.telefonica.com/role/PayablesAndOtherNonCurrentLiabilitiesNarrativeDetails
2149 Trade And Other Payables [Table] Table

*

*

 tef:TradeAndOtherPayablesTable
2150 Segments [axis] Axis ifrs-full:SegmentsAxis
2151 Segments [member] Member ifrs-full:SegmentsMember
2152 Telefónica México Member tef:TelefonicaMexicoMember
2153 Telefónica Brazil Member tef:TelefonicaBrazilMember
2154 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2155 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2156 Spectrum Member tef:SpectrumLicensesMember
2157 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
2158 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
2159 Licenses Member ifrs-full:LicencesAndFranchisesMember
2160 Trade And Other Payables [Line Items] LineItems tef:TradeAndOtherPayablesLineItems
2161 Non-current portion of non-current borrowings Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
2162 Payment on borrowings Concept (Monetary) For Period Credit tef:PaymentOnBorrowings
2163 Non-current government grants Concept (Monetary) As Of Credit ifrs-full:NoncurrentGovernmentGrants
2164 2422402 - Disclosure - Payables and Other Current Liabilities - Composition of Payables And Other Current Liabilities (Details) Network

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 http://www.telefonica.com/role/PayablesAndOtherCurrentLiabilitiesCompositionOfPayablesAndOtherCurrentLiabilitiesDetails
2165 Implied Table Table

*

*

 implied:Table
2166 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
2167 Payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
2168 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
2169 Payables to suppliers of property, plant and equipment Concept (Monetary) As Of Credit ifrs-full:CurrentPayablesForPurchaseOfNoncurrentAssets
2170 Debt for spectrum acquisition Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
2171 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
2172 Dividends pending payment Concept (Monetary) As Of Credit ifrs-full:CurrentDividendPayables
2173 Associates and joint ventures payables (Note 9) Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
2174 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
2175 Contract liabilities (Note 20) Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
2176 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
2177 Advances received Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
2178 Total Concept (Monetary) As Of Credit tef:CurrentPayablesAndOtherCurrentLiabilities
2179 2422403 - Disclosure - Payables and Other Current Liabilities - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/PayablesAndOtherCurrentLiabilitiesNarrativeDetails
2180 Trade And Other Payables [Table] Table

*

*

 tef:TradeAndOtherPayablesTable
2181 Legal Entity [Axis] Axis dei:LegalEntityAxis
2182 Entity [Domain] Member dei:EntityDomain
2183 Telefonica, S.A. Member tef:TelefonicaS.A.Member
2184 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2185 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2186 Fundación Telefónica Member tef:FundacionTelefonicaMember
2187 Segments [axis] Axis ifrs-full:SegmentsAxis
2188 Segments [member] Member ifrs-full:SegmentsMember
2189 Telefónica México Member tef:TelefonicaMexicoMember
2190 Telefónica Brazil Member tef:TelefonicaBrazilMember
2191 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2192 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2193 Spectrum swap Member tef:SpectrumLicensesMember
2194 1900 Mhz Spectrum Licenses Member tef:A1900MhzSpectrumLicensesMember
2195 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
2196 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
2197 Service concession arrangements and licenses Member ifrs-full:LicencesAndFranchisesMember
2198 Trade And Other Payables [Line Items] LineItems tef:TradeAndOtherPayablesLineItems
2199 Debt for spectrum acquisition Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
2200 Current government grants Concept (Monetary) As Of Credit ifrs-full:CurrentGovernmentGrants
2201 Pending payments of other current non-financial non-trade payables Concept (Monetary) As Of Credit tef:PendingPaymentsofOtherCurrentNonFinancialNonTradePayables
2202 Outstanding commitments made by entity, related party transactions Concept (Monetary) As Of Credit ifrs-full:OutstandingCommitmentsMadeByEntityRelatedPartyTransactions
2203 Weighted average maturity period Concept (xbrli:durationItemType) For Period tef:WeightedAverageMaturityPeriodPaymentPeriodToSuppliers
2204 2422404 - Disclosure - Payables and Other Current Liabilities - Composition of Other Payables (Details) Network

*

*

 http://www.telefonica.com/role/PayablesAndOtherCurrentLiabilitiesCompositionOfOtherPayablesDetails
2205 Implied Table Table

*

*

 implied:Table
2206 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
2207 Accrued employee benefits Concept (Monetary) As Of Credit ifrs-full:ShorttermEmployeeBenefitsAccruals
2208 Other non-financial non-trade payables Concept (Monetary) As Of Credit tef:OtherCurrentNonFinancialNonTradePayables
2209 Total Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
2210 2422405 - Disclosure - Payables and Other Current Liabilities - Information on Average Payment Period to Suppliers (Details) Network

*

*

 http://www.telefonica.com/role/PayablesAndOtherCurrentLiabilitiesInformationOnAveragePaymentPeriodToSuppliersDetails
2211 Entities [Table] Table

*

*

 dei:EntitiesTable
2212 Legal Entity [Axis] Axis dei:LegalEntityAxis
2213 Entity [Domain] Member dei:EntityDomain
2214 Telefonica, S.A. Member tef:TelefonicaS.A.Member
2215 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
2216 Weighted average maturity period Concept (xbrli:durationItemType) For Period tef:WeightedAverageMaturityPeriodPaymentPeriodToSuppliers
2217 Ratio of payments Concept (xbrli:durationItemType) For Period tef:RatioOfPayments
2218 Ratio of outstanding invoices Concept (xbrli:durationItemType) For Period tef:RatioOfOutstandingInvoices
2219 Total payments Concept (Monetary) For Period Credit ifrs-full:PaymentsToSuppliersForGoodsAndServices
2220 Outstanding invoices Concept (Monetary) As Of Credit tef:OutstandingInvoicesFromSuppliers
2221 2423402 - Disclosure - Breakdown of Contractual Assets and Liabilities, and Capitalized Costs - Movement in Contract Assets and Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/BreakdownOfContractualAssetsAndLiabilitiesAndCapitalizedCostsMovementInContractAssetsAndLiabilitiesDetails
2222 Contract Assets And Liabilities [Table] Table

*

*

 tef:ContractAssetsAndLiabilitiesTable
2223 Range [axis] Axis ifrs-full:RangeAxis
2224 Ranges [member] Member ifrs-full:RangesMember
2225 Minimum Member ifrs-full:BottomOfRangeMember
2226 Maximum Member ifrs-full:TopOfRangeMember
2227 Contract duration [axis] Axis ifrs-full:ContractDurationAxis
2228 Contract duration [member] Member ifrs-full:ContractDurationMember
2229 Long-term contracts Member ifrs-full:LongtermContractsMember
2230 Short-term contracts Member ifrs-full:ShorttermContractsMember
2231 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2232 Carrying amount [member] Member ifrs-full:CarryingAmountMember
2233 Gross cost Member ifrs-full:GrossCarryingAmountMember
2234 Impairment losses Member ifrs-full:AccumulatedImpairmentMember
2235 Contract Assets And Liabilities [Line Items] LineItems tef:ContractAssetsAndLiabilitiesLineItems
2236 Contract assets [abstract] Abstract ifrs-full:ContractAssetsAbstract
2237 Contract assets, beginning balance Concept (Monetary) As Of Debit ifrs-full:ContractAssets
2238 First application of new IFRS impacts Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueContractAssets
2239 Additions Concept (Monetary) For Period Debit ifrs-full:IncreaseThroughBusinessCombinationsContractAssets
2240 Disposals Concept (Monetary) For Period Credit tef:DecreaseThroughDisposalsContractAssets
2241 Transfers Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughTransfersContractAssets
2242 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughTranslationDifferencesAndHyperinflationAdjustmentsContractAssets
2243 Contract assets, ending balance Concept (Monetary) As Of Debit ifrs-full:ContractAssets
2244 Contract liabilities [abstract] Abstract ifrs-full:ContractLiabilitiesAbstract
2245 Contract liabilities, beginning balance Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
2246 First application of new IFRS impacts Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueContractLiabilities
2247 Additions Concept (Monetary) For Period Credit ifrs-full:IncreaseThroughBusinessCombinationsContractLiabilities
2248 Disposals Concept (Monetary) For Period Debit tef:DecreaseThroughDisposalsContractLiabilities
2249 Transfers Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughTransfersContractLiabilities
2250 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughTranslationDifferencesAndHyperinflationAdjustmentsContractLiabilities
2251 Contract liabilities, ending balance Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
2252 Contract liabilities performance period Concept (xbrli:durationItemType) For Period tef:ContractLiabilitiesPerformancePeriod
2253 2423403 - Disclosure - Breakdown of Contractual Assets and Liabilities, and Capitalized Costs - Movement in Deferred Expenses (Details) Network

*

*

 http://www.telefonica.com/role/BreakdownOfContractualAssetsAndLiabilitiesAndCapitalizedCostsMovementInDeferredExpensesDetails
2254 Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [table] Table

*

*

 ifrs-full:DisclosureOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersTable
2255 Categories of assets recognised from costs to obtain or fulfil contracts with customers [axis] Axis ifrs-full:CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersAxis
2256 Categories of assets recognised from costs to obtain or fulfil contracts with customers [member] Member ifrs-full:CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersMember
2257 Of obtaining a contract Member ifrs-full:CostsToObtainContractsWithCustomersMember
2258 Of fulfilling a contract Member ifrs-full:SetupCostsMember
2259 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2260 Carrying amount [member] Member ifrs-full:CarryingAmountMember
2261 Gross cost Member ifrs-full:GrossCarryingAmountMember
2262 Impairment losses Member ifrs-full:AccumulatedImpairmentMember
2263 Contract duration [axis] Axis ifrs-full:ContractDurationAxis
2264 Contract duration [member] Member ifrs-full:ContractDurationMember
2265 Long-term contracts Member ifrs-full:LongtermContractsMember
2266 Short-term contracts Member ifrs-full:ShorttermContractsMember
2267 Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [line items] LineItems ifrs-full:DisclosureOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersLineItems
2268 Capitalized costs, beginning balance Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
2269 First application of new IFRS impacts Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughCumulativeCatchUpAdjustmentsToRevenueCapitalizedCosts
2270 Additions Concept (Monetary) For Period Debit tef:IncreaseThroughBusinessCombinationsCapitalizedCosts
2271 Disposals Concept (Monetary) For Period Credit tef:DecreaseThroughDisposalsCapitalizedCosts
2272 Transfers Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughTransfersCapitalizedCosts
2273 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughTranslationDifferencesAndHyperinflationAdjustmentsCapitalizedCosts
2274 Capitalized costs, ending balance Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
2275 2423404 - Disclosure - Breakdown of Contractual Assets and Liabilities, and Capitalized Costs - Maturity Schedule of Contractual Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/BreakdownOfContractualAssetsAndLiabilitiesAndCapitalizedCostsMaturityScheduleOfContractualLiabilitiesDetails
2276 Disclosure of transaction price allocated to remaining performance obligations [table] Table

*

*

 ifrs-full:DisclosureOfTransactionPriceAllocatedToRemainingPerformanceObligationsTable
2277 Maturity [axis] Axis ifrs-full:MaturityAxis
2278 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2279 2019 Member ifrs-full:NotLaterThanOneYearMember
2280 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2281 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2282 Subsequent years Member ifrs-full:LaterThanThreeYearsMember
2283 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2284 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2285 Activation Fees Member tef:ActivationFeesMember
2286 Sales of Prepay Cards Member tef:SalesOfPrepayCardsMember
2287 Services Member tef:ServicesMember
2288 Sales of Handsets Member tef:SalesOfHandsetsMember
2289 Irrevocable Rights to Use Member tef:IrrevocableRightsToUseMember
2290 Other Member tef:OtherProductsAndServicesMember
2291 Disclosure of transaction price allocated to remaining performance obligations [line items] LineItems ifrs-full:DisclosureOfTransactionPriceAllocatedToRemainingPerformanceObligationsLineItems
2292 Maturity of performance obligations Concept (Monetary) As Of Credit ifrs-full:TransactionPriceAllocatedToRemainingPerformanceObligations
2293 2424402 - Disclosure - Provisions - Amounts of Provisions (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsAmountsOfProvisionsDetails
2294 Implied Table Table

*

*

 implied:Table
2295 Employee Benefits [Abstract] Abstract tef:EmployeeBenefitsAbstract
2296 Current Abstract ifrs-full:CurrentProvisionsAbstract
2297 Employee benefits Concept (Monetary) As Of Credit ifrs-full:CurrentProvisionsForEmployeeBenefits
2298 Termination plans Concept (Monetary) As Of Credit tef:CurrentProvisionsForTerminationPlans
2299 Post-employment defined benefit plans Concept (Monetary) As Of Credit tef:CurrentProvisionsForDefinedBenefitPlans
2300 Other benefits Concept (Monetary) As Of Credit tef:CurrentProvisionsForOtherEmployeeBenefits
2301 Desmantling of assets Concept (Monetary) As Of Credit tef:CurrentProvisionsForDismantlingOfAssets
2302 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
2303 Total Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
2304 Non-current Abstract ifrs-full:NoncurrentProvisionsAbstract
2305 Employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
2306 Termination plans Concept (Monetary) As Of Credit tef:NonCurrentProvisionsForTerminationPlans
2307 Post-employment defined benefit plans Concept (Monetary) As Of Credit tef:NonCurrentProvisionsForDefinedBenefitPlans
2308 Other benefits Concept (Monetary) As Of Credit tef:NonCurrentProvisionsForOtherEmployeeBenefits
2309 Desmantling of assets Concept (Monetary) As Of Credit tef:NonCurrentProvisionsForDismantlingOfAssets
2310 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
2311 Total Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
2312 Total Abstract tef:TotalProvisionsAbstract
2313 Employee benefits Concept (Monetary) As Of Credit ifrs-full:ProvisionsForEmployeeBenefits
2314 Termination plans Concept (Monetary) As Of Credit tef:ProvisionsForTerminationPlans
2315 Post-employment defined benefit plans Concept (Monetary) As Of Credit tef:ProvisionsForDefinedBenefitPlans
2316 Other benefits Concept (Monetary) As Of Credit tef:ProvisionsForOtherEmployeeBenefits
2317 Desmantling of assets Concept (Monetary) As Of Credit tef:ProvisionForDismantlingOfAssets
2318 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2319 Total Concept (Monetary) As Of Credit ifrs-full:Provisions
2320 2424403 - Disclosure - Provisions - Termination Plans (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsTerminationPlansDetails
2321 Implied Table Table

*

*

 implied:Table
2322 Employee Benefits [Abstract] Abstract tef:EmployeeBenefitsAbstract
2323 Provision for post-employment plans Concept (Monetary) As Of Credit tef:ProvisionsForTerminationPlans
2324 Additions Concept (Monetary) For Period Credit tef:AdditionsToProvisionsForTerminationPlans
2325 Retirements/amount applied Concept (Monetary) For Period Credit tef:IncreaseDecreaseInProvisionsForTerminationPlansDueToRetirements
2326 Transfers Concept (Monetary) For Period Credit tef:IncreaseDecreaseInTerminationPlansThroughTransfersToFromTerminationPlans
2327 Translation differences and accretion Concept (Monetary) For Period Credit tef:IncreaseDecreaseInProvisionsForTerminationPlansDueToTranslationDifferencesAndAccretion
2328 Provision for post-employment plans Concept (Monetary) As Of Credit tef:ProvisionsForTerminationPlans
2329 2424404 - Disclosure - Provisions - Telefonica Spain, Germany, and S.A. Restructuring (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsTelefonicaSpainGermanyAndSARestructuringDetails
2330 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2331 Restructuring Plan [Axis] Axis tef:RestructuringPlan1Axis
2332 Restructuring Plan [Domain] Member tef:RestructuringPlan1Domain
2333 2003-2007 Labor Force Reduction Plan Member tef:A20032007LaborForceReductionPlanMember
2334 2011-2013 Labor Force Reduction Plan Member tef:A20112013LaborForceReductionPlanMember
2335 Voluntary Termination Plan Member tef:VoluntaryTerminationPlanMember
2336 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2337 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2338 Restructuring provision Member ifrs-full:RestructuringProvisionMember
2339 Segments [axis] Axis ifrs-full:SegmentsAxis
2340 Segments [member] Member ifrs-full:SegmentsMember
2341 Telefónica Spain Member tef:TelefonicaSpainMember
2342 Telefónica Germany Member tef:TelefonicaGermanyMember
2343 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2344 Number of employees participating in labor force reduction plan Concept (Integer) For Period tef:NumberOfEmployeesTerminated
2345 Restructuring provision Concept (Monetary) As Of Credit ifrs-full:RestructuringProvision
2346 Current restructuring provision Concept (Monetary) As Of Credit ifrs-full:ShorttermRestructuringProvision
2347 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2348 Average duration of plans Concept (Decimal) For Period ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
2349 Addition to termination plans provision Concept (Monetary) For Period Credit tef:AdditionsToProvisionsForTerminationPlans
2350 2424405 - Disclosure - Provisions - Post-Employment Defined Benefit Plans by Country of Operation (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsPostEmploymentDefinedBenefitPlansByCountryOfOperationDetails
2351 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
2352 Segments [axis] Axis ifrs-full:SegmentsAxis
2353 Segments [member] Member ifrs-full:SegmentsMember
2354 Spain (Antares) Member tef:TelefonicaSpainMember
2355 United Kingdom Member tef:TelefonicaUnitedKingdomMember
2356 Germany Member tef:TelefonicaGermanyMember
2357 Brazil Member tef:TelefonicaBrazilMember
2358 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
2359 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
2360 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2361 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2362 Operating segments Member ifrs-full:OperatingSegmentsMember
2363 Others Member tef:OtherCompaniesAndEliminationsMember
2364 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2365 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2366 Obligation Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2367 Assets Member ifrs-full:PlanAssetsMember
2368 Net provision before asset ceiling Member tef:NetProvisionBeforeAssetCeilingMember
2369 Asset ceiling Member ifrs-full:EffectOfAssetCeilingMember
2370 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2371 Total Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2372 Net provision Concept (Monetary) As Of Credit tef:ProvisionsForDefinedBenefitPlans
2373 Net assets Concept (Monetary) As Of Credit tef:LiabilityAssetOfDefinedBenefitPlansNetOfProvisions
2374 2424406 - Disclosure - Provisions - Movement in the Present Value of Obligations (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMovementInPresentValueOfObligationsDetails
2375 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
2376 Segments [axis] Axis ifrs-full:SegmentsAxis
2377 Segments [member] Member ifrs-full:SegmentsMember
2378 Spain (Antares) Member tef:TelefonicaSpainMember
2379 United Kingdom Member tef:TelefonicaUnitedKingdomMember
2380 Germany Member tef:TelefonicaGermanyMember
2381 Brazil Member tef:TelefonicaBrazilMember
2382 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
2383 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
2384 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2385 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2386 Operating segments Member ifrs-full:OperatingSegmentsMember
2387 Others Member tef:OtherCompaniesAndEliminationsMember
2388 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2389 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2390 Present value of obligation Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2391 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2392 Net defined benefit liability (asset) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2393 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2394 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2395 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2396 Actuarial losses and gains Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2397 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2398 Inclusion of companies Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset
2399 Transfers Concept (Monetary) For Period Credit tef:Increasedecreasethroughtransfersnetdefinedbenefitliabilityasset
2400 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2401 Net defined benefit liability (asset) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2402 2424407 - Disclosure - Provisions - Movements in the Fair Value of Plan Assets (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMovementsInFairValueOfPlanAssetsDetails
2403 Disclosure of fair value of plan assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueOfPlanAssetsTable
2404 Segments [axis] Axis ifrs-full:SegmentsAxis
2405 Segments [member] Member ifrs-full:SegmentsMember
2406 United Kingdom Member tef:TelefonicaUnitedKingdomMember
2407 Germany Member tef:TelefonicaGermanyMember
2408 Brazil Member tef:TelefonicaBrazilMember
2409 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2410 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2411 Operating segments Member ifrs-full:OperatingSegmentsMember
2412 Others Member tef:OtherCompaniesAndEliminationsMember
2413 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2414 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2415 Fair value of plan assets Member ifrs-full:PlanAssetsMember
2416 Disclosure of fair value of plan assets [line items] LineItems ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
2417 Net defined benefit asset (liability) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2418 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2419 Interest income Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2420 Actuarial losses and gains Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2421 Company contributions Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
2422 Participants contributions Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
2423 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2424 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2425 Net defined benefit asset (liability) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2426 2424408 - Disclosure - Provisions - Principal Defined Benefit Plans (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsPrincipalDefinedBenefitPlansDetails
2427 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
2428 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2429 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2430 Seguos de Vida y Pensiones Antares Member tef:SeguosdeVidayPensionesAntaresMember
2431 Segments [axis] Axis ifrs-full:SegmentsAxis
2432 Segments [member] Member ifrs-full:SegmentsMember
2433 Telefónica Spain Member tef:TelefonicaSpainMember
2434 Plan Name [Axis] Axis tef:PlanName1Axis
2435 Plan Name [Domain] Member tef:PlanName1Domain
2436 ITP Member tef:ITPMember
2437 Survival Member tef:SurvivalPlanMember
2438 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2439 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2440 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2441 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2442 Percent of payments transferable to survivor Concept (Percent) For Period tef:PercentageOfPaymentsTransferableToSurvivor
2443 Provision for defined benefit plans Concept (Monetary) As Of Credit tef:ProvisionsForDefinedBenefitPlans
2444 Other long-term credits Concept (Monetary) As Of Debit tef:NoncurrentOtherCredits
2445 Average duration of plans Concept (Decimal) For Period ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
2446 2424409 - Disclosure - Provisions - Main Actuarial Assumptions Used in Valuing Defined Benefit Plans (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMainActuarialAssumptionsUsedInValuingDefinedBenefitPlansDetails
2447 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
2448 Segments [axis] Axis ifrs-full:SegmentsAxis
2449 Segments [member] Member ifrs-full:SegmentsMember
2450 Telefónica Spain Member tef:TelefonicaSpainMember
2451 Plan Name [Axis] Axis tef:PlanName1Axis
2452 Plan Name [Domain] Member tef:PlanName1Domain
2453 Survival Member tef:SurvivalPlanMember
2454 ITP Member tef:ITPMember
2455 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2456 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2457 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2458 Range [axis] Axis ifrs-full:RangeAxis
2459 Ranges [member] Member ifrs-full:RangesMember
2460 Minimum Member ifrs-full:BottomOfRangeMember
2461 Maximum Member ifrs-full:TopOfRangeMember
2462 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2463 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2464 Expected rate of salary increase Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2465 2424410 - Disclosure - Provisions - Main Actuarial Assumptions Used in Telefónica United Kingdom Pension Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMainActuarialAssumptionsUsedInTelefnicaUnitedKingdomPensionPlanDetails
2466 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
2467 Segments [axis] Axis ifrs-full:SegmentsAxis
2468 Segments [member] Member ifrs-full:SegmentsMember
2469 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2470 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2471 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2472 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2473 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2474 Number of beneficiaries under plan Concept (Integer) As Of tef:NumberOfBeneficiaries
2475 Average duration of plans Concept (Decimal) For Period ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
2476 Nominal rate of pension payment increase Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreases
2477 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2478 Expected inflation Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
2479 2424411 - Disclosure - Provisions - Fair Value of Plan Assets for Telefónica United Kingdom Pension Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsFairValueOfPlanAssetsForTelefnicaUnitedKingdomPensionPlanDetails
2480 Disclosure of fair value of plan assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueOfPlanAssetsTable
2481 Segments [axis] Axis ifrs-full:SegmentsAxis
2482 Segments [member] Member ifrs-full:SegmentsMember
2483 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2484 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2485 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2486 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2487 Disclosure of fair value of plan assets [line items] LineItems ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
2488 Bonds Concept (Monetary) As Of Debit ifrs-full:DebtInstrumentsAmountContributedToFairValueOfPlanAssets
2489 Total Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
2490 2424412 - Disclosure - Provisions - Effect of Changes in Actuarial Assumptions on Defined Benefit Obligation of Telefonica United Kingdom Pension Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsEffectOfChangesInActuarialAssumptionsOnDefinedBenefitObligationOfTelefonicaUnitedKingdomPensionPlanDetails
2491 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

 ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
2492 Segments [axis] Axis ifrs-full:SegmentsAxis
2493 Segments [member] Member ifrs-full:SegmentsMember
2494 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2495 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2496 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2497 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2498 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
2499 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
2500 Discount rate Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
2501 Expected inflation Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflationMember
2502 Life expectancy Member ifrs-full:ActuarialAssumptionOfLifeExpectancyAfterRetirementMember
2503 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2504 Percent of possible decrease in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
2505 Percentage of possible increase in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
2506 Possible increase in life expectancy Concept (xbrli:durationItemType) For Period tef:ReasonablyPossibleIncreaseInActuarialAssumptionOfLifeExpectancy
2507 Discount rate (0.25% decrease) Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
2508 Increase in defined benefit obligation Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
2509 2424413 - Disclosure - Provisions - Main Actuarial Assumptions Used in Telefónica Brazil Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMainActuarialAssumptionsUsedInTelefnicaBrazilPlanDetails
2510 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
2511 Segments [axis] Axis ifrs-full:SegmentsAxis
2512 Segments [member] Member ifrs-full:SegmentsMember
2513 Telefónica Brazil Member tef:TelefonicaBrazilMember
2514 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2515 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2516 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2517 Range [axis] Axis ifrs-full:RangeAxis
2518 Ranges [member] Member ifrs-full:RangesMember
2519 Minimum Member ifrs-full:BottomOfRangeMember
2520 Maximum Member ifrs-full:TopOfRangeMember
2521 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2522 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2523 Nominal rate of salary increase Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2524 Long-term inflation rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
2525 Growth rate for medical costs Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
2526 2424414 - Disclosure - Provisions - Sensitivity to Changes in Actuarial Assumptions on Discounted Obligation of Telefónica Brazil Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsSensitivityToChangesInActuarialAssumptionsOnDiscountedObligationOfTelefnicaBrazilPlanDetails
2527 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

 ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
2528 Segments [axis] Axis ifrs-full:SegmentsAxis
2529 Segments [member] Member ifrs-full:SegmentsMember
2530 Telefónica Brazil Member tef:TelefonicaBrazilMember
2531 Defined Benefit Plan Type [Axis] Axis tef:DefinedBenefitPlanTypeAxis
2532 Defined Benefit Plan Type [Domain] Member tef:DefinedBenefitPlanTypeDomain
2533 Pension plans Member tef:PensionPlansMember
2534 Health plans Member tef:HealthPlansMember
2535 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2536 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2537 Foreign defined benefit plans Member tef:ForeignDefinedBenefitPlanMember
2538 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
2539 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
2540 Discount rate Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
2541 Growth rate Member ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember
2542 Scenario [Axis] Axis tef:ScenarioAxis
2543 Scenario [Domain] Member tef:ScenarioDomain
2544 Present value of the obligation by increasing the discount rate by 0.5% Member tef:A0.5IncreaseInDiscountRateMember
2545 Present value of the obligation by reducing the discount rate by 0.5% Member tef:A0.5DecreaseInDiscountRateMember
2546 Present value of the obligation by increasing the rate by 1% Member tef:A1IncreaseInDiscountRateMember
2547 Present value of the obligation by reducing the rate by 1% Member tef:A1DecreaseInDiscountRateMember
2548 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2549 Defined benefit obligation, at present value Concept (Monetary) As Of Credit ifrs-full:DefinedBenefitObligationAtPresentValue
2550 Percentage of possible increase in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
2551 Percentage of reasonably possible decrease in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
2552 2424415 - Disclosure - Provisions - Individual Suspension Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsIndividualSuspensionPlanDetails
2553 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
2554 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2555 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2556 Individual Suspension Plan Member tef:IndividualSuspensionPlanMember
2557 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2558 Provisions for employee benefits Concept (Monetary) As Of Credit ifrs-full:ProvisionsForEmployeeBenefits
2559 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2560 Average duration of plans Concept (xbrli:durationItemType) For Period tef:WeightedAverageDurationOfPlan
2561 2424416 - Disclosure - Provisions - Sensitivity Analysis Used in Individual Suspension Plan (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsSensitivityAnalysisUsedInIndividualSuspensionPlanDetails
2562 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

 ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
2563 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
2564 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
2565 Individual Suspension Plan Member tef:IndividualSuspensionPlanMember
2566 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
2567 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
2568 Discount rate Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
2569 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2570 Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
2571 Impact on income statement Concept (Monetary) As Of Debit tef:DecreaseInIncomeDueToReasonablyPossibleIncreaseInActuarialAssumption
2572 Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
2573 Impact on income statement Concept (Monetary) As Of Credit tef:IncreaseInIncomeDueToReasonablyPossibleDecreaseInActuarialAssumption
2574 2424417 - Disclosure - Provisions - Movement in Provisions (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsMovementInProvisionsDetails
2575 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2576 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2577 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2578 Dismantling of assets Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
2579 Other provisions Member ifrs-full:MiscellaneousOtherProvisionsMember
2580 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2581 Other provisions at beginning of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2582 Additions and accretion Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
2583 Retirements/amount applied Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
2584 Transfers Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
2585 Translation differences and other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
2586 Other provisions at end of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2587 2424418 - Disclosure - Provisions - Provisions by Segment (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsProvisionsBySegmentDetails
2588 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2589 Segments [axis] Axis ifrs-full:SegmentsAxis
2590 Segments [member] Member ifrs-full:SegmentsMember
2591 Telefónica Spain Member tef:TelefonicaSpainMember
2592 Telefónica Germany Member tef:TelefonicaGermanyMember
2593 Telefónica Brazil Member tef:TelefonicaBrazilMember
2594 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2595 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
2596 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
2597 Telefonica, S.A. Member tef:TelefonicaS.A.Member
2598 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2599 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2600 Operating segments Member ifrs-full:OperatingSegmentsMember
2601 Other companies Member tef:OtherCompaniesMember
2602 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2603 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2604 2424419 - Disclosure - Provisions - Provisions Narrative (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsProvisionsNarrativeDetails
2605 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2606 Legal Entity [Axis] Axis dei:LegalEntityAxis
2607 Entity [Domain] Member dei:EntityDomain
2608 Seguros de Vida y Pensiones Antares, S.A. Life insurance, pensions and health insurance Member tef:SegurosdeVidayPensionesAntaresSAMember
2609 Segments [axis] Axis ifrs-full:SegmentsAxis
2610 Segments [member] Member ifrs-full:SegmentsMember
2611 Telefónica Brazil Member tef:TelefonicaBrazilMember
2612 Telefónica Peru Member tef:TelefonicaPeruMember
2613 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2614 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2615 Vivo Member tef:VivoMember
2616 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2617 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2618 Other provisions Member ifrs-full:MiscellaneousOtherProvisionsMember
2619 Dismantling of assets Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
2620 Goodwill amortized for tax Member tef:GoodwillAmortizedForTaxProvisionMember
2621 Regulatory proceedings Member tef:RegulatoryProceedingsProvisionMember
2622 Tax proceedings Member ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember
2623 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
2624 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
2625 Tax contingent liability Member ifrs-full:TaxContingentLiabilityMember
2626 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2627 Transfers Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
2628 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2629 Estimated financial effect of contingent liabilities Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
2630 Goodwill expected to be deductible for tax purposes Concept (Monetary) As Of Debit ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
2631 2424420 - Disclosure - Provisions - Balances of Provisions (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsBalancesOfProvisionsDetails
2632 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2633 Segments [axis] Axis ifrs-full:SegmentsAxis
2634 Segments [member] Member ifrs-full:SegmentsMember
2635 Telefónica Brazil Member tef:TelefonicaBrazilMember
2636 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2637 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2638 Provisions for tax proceedings Member ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember
2639 Provisions for regulatory proceedings Member tef:RegulatoryProceedingsProvisionMember
2640 Provisions for labor claims Member tef:LaborClaimsProvisionMember
2641 Provisions for civil proceedings Member ifrs-full:LegalProceedingsProvisionMember
2642 Income Tax Authority [Axis] Axis tef:IncomeTaxAuthority1Axis
2643 Income Tax Authority [Domain] Member tef:IncomeTaxAuthority1Domain
2644 Federal taxes Member tef:FederalTaxAuthorityMember
2645 State taxes Member tef:StateTaxAuthorityMember
2646 Municipal taxes Member tef:MunicipalTaxAuthorityMember
2647 FUST, FISTEL and EBC Member tef:FUSTFISTELandEBCTaxAuthoritiesMember
2648 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2649 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2650 2424421 - Disclosure - Provisions - Provisions for Tax Proceedings (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsProvisionsForTaxProceedingsDetails
2651 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2652 Segments [axis] Axis ifrs-full:SegmentsAxis
2653 Segments [member] Member ifrs-full:SegmentsMember
2654 Telefónica Brazil Member tef:TelefonicaBrazilMember
2655 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2656 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2657 Tax proceedings Member ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember
2658 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2659 Other provisions at beginning of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2660 Movements with a counterparty in judicial deposits Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
2661 Movements with a counterparty in the income statement Concept (Monetary) For Period Debit ifrs-full:UnusedProvisionReversedOtherProvisions
2662 Write-offs due to payment Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
2663 Monetary updating Concept (Monetary) For Period Credit tef:Increasedecreasethroughmonetaryupdatingotherprovisions
2664 Translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
2665 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
2666 Other provisions at end of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2667 2424422 - Disclosure - Provisions - Provisions for Judicial Proceedings (Details) Network

*

*

 http://www.telefonica.com/role/ProvisionsProvisionsForJudicialProceedingsDetails
2668 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
2669 Segments [axis] Axis ifrs-full:SegmentsAxis
2670 Segments [member] Member ifrs-full:SegmentsMember
2671 Telefónica Brazil Member tef:TelefonicaBrazilMember
2672 Reason for Provision [Axis] Axis tef:ReasonforProvisionAxis
2673 Reason for Provision [Domain] Member tef:ReasonforProvisionDomain
2674 Judicial Proceedings Member tef:JudicialProceedingsMember
2675 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2676 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2677 Tax proceedings Member ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember
2678 Labor claims Member tef:LaborClaimsProvisionMember
2679 Civil proceedings Member ifrs-full:LegalProceedingsProvisionMember
2680 Regulatory proceedings Member tef:RegulatoryProceedingsProvisionMember
2681 Garnishments Member tef:GarnishmentsProvisionMember
2682 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2683 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2684 Current (see Note 13) Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
2685 Non-current (see Note 11) Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
2686 2425402 - Disclosure - Income Tax Matters - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersNarrativeDetails
2687 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2688 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2689 Other provisions [member] Member ifrs-full:OtherProvisionsMember
2690 Tax proceedings Member ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember
2691 Segments [axis] Axis ifrs-full:SegmentsAxis
2692 Segments [member] Member ifrs-full:SegmentsMember
2693 Telefónica Peru Member tef:TelefonicaPeruMember
2694 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2695 Geographical areas [Domain] Member ifrs-full:GeographicalAreasMember
2696 Spain Member country:ES
2697 Germany Member country:DE
2698 Hispanoamérica Member tef:HispanoamericaMember
2699 Legal Entity [Axis] Axis dei:LegalEntityAxis
2700 Entity [Domain] Member dei:EntityDomain
2701 Telefonica Moviles Mexico Member tef:TelefonicaMovilesMexicoMember
2702 Colombia Telecomunicaciones, S.A, ESP Member tef:ColombiaTelecomunicacionesS.A.ESPMember
2703 Telefónica Germany Member tef:TelefonicaGermanyMember
2704 Telefonica Venezolana Member tef:TelefonicaVenezolanaMember
2705 Telefónica Germany Holdings Ltd. Holding company Member tef:TelefonicaGermanyHoldingsMember
2706 Telefonica, S.A. Member tef:TelefonicaS.A.Member
2707 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
2708 Telefónica Brazil Member tef:TelefonicaBrazilMember
2709 Telefónica Móviles Chile, S.A. Member tef:TelefonicaMovilesChileS.A.Member
2710 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2711 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2712 Debt with PARAPAT Member tef:TemporaryDifferenceRelatedPartyDebtMember
2713 Unused tax deductions Member ifrs-full:UnusedTaxCreditsMember
2714 Temporary differences Member ifrs-full:TemporaryDifferenceMember
2715 Hyperinflation adjustment Member tef:HyperinflationAdjustmentMember
2716 Goodwill amortized for tax Member tef:GoodwillAmortizedForTaxProvisionMember
2717 Merger Member tef:MergerMember
2718 Derecognized tax assets Member tef:DerecognizedTaxAssetsMember
2719 Total unused tax credits Member tef:TotalUnusedTaxCreditsMember
2720 Workforce restructuring plan Member tef:WorkforceRestructuringPlanMember
2721 July 2015 tax inspection Member tef:July2015TaxInspectionMember
2722 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2723 Number of consolidated tax group companies Concept (Integer) As Of tef:NumberOfConsolidatedTaxGroupCompanies
2724 Capitalized tax loss carryforward Concept (Monetary) As Of Credit tef:CapitalizedTaxLossCarryforward
2725 Tax credits reversed Concept (Monetary) For Period Debit tef:TaxCreditsReversed
2726 Disposal of deferred tax assets Concept (Monetary) For Period Debit tef:DisposalOfTaxAsset
2727 Tax credits recognized Concept (Monetary) For Period Credit tef:TaxCreditsRecognized
2728 Applied tax loss carryforwards Concept (Monetary) As Of Credit tef:AppliedTaxLossCarryforwards
2729 Increase (decrease) in deferred tax liability (asset) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInDeferredTaxLiabilityAsset
2730 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2731 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2732 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2733 Deferred tax liabilities reclassified Concept (Monetary) As Of Credit tef:DeferredTaxLiabilitiesReclassified
2734 Unused tax loss carryforwards Concept (Monetary) As Of Credit tef:UnusedTaxLossCarryforwards
2735 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
2736 Positive tax effect of impairment of goodwill Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfImpairmentOfGoodwill
2737 Amortized goodwill for tax purposes Concept (Monetary) As Of Debit ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
2738 Corporate income tax assessment Concept (Monetary) For Period Debit tef:IncomeTaxAssessment
2739 Percentage of dispute that accounts for total amount under litigation Concept (Percent) For Period tef:PercentageofDisputethatAccountsforTotalAmountunderLitigation
2740 Losses on litigation settlements Concept (Monetary) For Period Debit ifrs-full:LossesOnLitigationSettlements
2741 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2742 2425403 - Disclosure - Income Tax Matters - Deferred Taxes Movement (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersDeferredTaxesMovementDetails
2743 Implied Table Table

*

*

 implied:Table
2744 Income Taxes [Abstract] Abstract tef:IncomeTaxesAbstract
2745 Beginning balance, Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2746 Additions Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxAsset
2747 Disposals Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxAsset
2748 Transfers Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAsset
2749 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Debit tef:IncreaseDecreaseThroughTranslationDifferencesDeferredTaxAsset
2750 Company movements and others Concept (Monetary) For Period Debit tef:IncreaseDecreaseInCompanyMovementsDeferredTaxAsset
2751 Ending balance, Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2752 Beginning balance, Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2753 Additions Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiability
2754 Disposals Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxLiability
2755 Transfers Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiability
2756 Translation differences and hyperinflation adjustments Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughTranslationDifferencesDeferredTaxLiability
2757 Company movements and others Concept (Monetary) For Period Credit tef:IncreaseDecreaseInCompanyMovementsDeferredTaxLiability
2758 Ending balance, Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2759 2425404 - Disclosure - Income Tax Matters - Expected Realization of Deferred Tax Assets and Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersExpectedRealizationOfDeferredTaxAssetsAndLiabilitiesDetails
2760 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2761 Geographical [Axis] Axis srt:StatementGeographicalAxis
2762 Geographical [Domain] Member srt:SegmentGeographicalDomain
2763 Spain Member country:ES
2764 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2765 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2766 Unused tax deductions Member ifrs-full:UnusedTaxCreditsMember
2767 Tax credits for loss carryforwards Member ifrs-full:UnusedTaxLossesMember
2768 Maturity [axis] Axis ifrs-full:MaturityAxis
2769 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2770 Less than 1 year Member ifrs-full:NotLaterThanOneYearMember
2771 More than 360 days Member ifrs-full:LaterThanOneYearMember
2772 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2773 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2774 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2775 2425405 - Disclosure - Income Tax Matters - Deferred Tax Assets (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersDeferredTaxAssetsDetails
2776 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2777 Legal Entity [Axis] Axis dei:LegalEntityAxis
2778 Entity [Domain] Member dei:EntityDomain
2779 Telefonica, S.A. Member tef:TelefonicaS.A.Member
2780 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2781 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2782 Tax credits for loss carryforwards Member ifrs-full:UnusedTaxLossesMember
2783 Unused tax deductions Member ifrs-full:UnusedTaxCreditsMember
2784 Deferred tax assets for temporary differences Member ifrs-full:TemporaryDifferenceMember
2785 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2786 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2787 2425406 - Disclosure - Income Tax Matters - Tax Credits for Loss Carry-Forwards (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersTaxCreditsForLossCarryForwardsDetails
2788 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2789 Maturity [axis] Axis ifrs-full:MaturityAxis
2790 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2791 Less than 1 year Member ifrs-full:NotLaterThanOneYearMember
2792 More than 360 days Member ifrs-full:LaterThanOneYearMember
2793 Legal Entity [Axis] Axis dei:LegalEntityAxis
2794 Entity [Domain] Member dei:EntityDomain
2795 Telefónica Spain Member tef:TelefonicaSpainMember
2796 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2797 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2798 Spain Member country:ES
2799 Germany Member country:DE
2800 Hispanoamérica Member tef:HispanoamericaMember
2801 Other countries Member tef:OutsideofParentCountryMember
2802 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2803 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2804 Tax credits for loss carryforwards Member ifrs-full:UnusedTaxLossesMember
2805 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2806 Beginning balance, Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2807 Additions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
2808 Reversals Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxLiabilityAsset
2809 Perimeter changes Concept (Monetary) For Period Credit tef:IncreaseDecreaseThroughInclusionOfCompaniesDeferredTaxLiabilityAsset
2810 Translation differences and other Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
2811 Ending balance, Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2812 Tax loss carryforwards generated in the tax group Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
2813 2425407 - Disclosure - Income Tax Matters - Temporary Differences (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersTemporaryDifferencesDetails
2814 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2815 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2816 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2817 Goodwill and intangible assets Member tef:GoodwillAndIntangibleAssetsMember
2818 Property, plant and equipment Member ifrs-full:OtherPropertyPlantAndEquipmentMember
2819 Personnel commitments Member tef:PersonnelCommitmentsMember
2820 Provisions Member tef:ProvisionsMember
2821 Investments in subsidiaries, associates and other shareholdings Member ifrs-full:EquityInvestmentsMember
2822 Inventories and receivables Member tef:InventoriesAndReceivablesMember
2823 Other Member ifrs-full:OtherTemporaryDifferencesMember
2824 Total deferred tax assets for temporary differences Member ifrs-full:TemporaryDifferenceMember
2825 Total temporary difference Member tef:TotalTemporaryDifferenceMember
2826 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2827 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2828 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2829 Deferred tax liabilities (assets) offset Concept (Monetary) As Of Credit tef:DeferredTaxLiabilitiesAssetsOffset
2830 2425408 - Disclosure - Income Tax Matters - Tax Payables and Receivables (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersTaxPayablesAndReceivablesDetails
2831 Implied Table Table

*

*

 implied:Table
2832 Income Taxes [Abstract] Abstract tef:IncomeTaxesAbstract
2833 Tax withholdings Concept (Monetary) As Of Credit tef:CurrentTaxWithholdings
2834 Indirect taxes Concept (Monetary) As Of Credit tef:CurrentIndirectTaxesPayable
2835 Social security Concept (Monetary) As Of Credit ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
2836 Current income taxes payable Concept (Monetary) As Of Credit tef:CurrentIncomeTaxesPayable
2837 Other Concept (Monetary) As Of Credit tef:OtherTaxesPayable
2838 Total Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
2839 Indirect tax Concept (Monetary) As Of Debit tef:CurrentIndirectTaxesReceivable
2840 Current income taxes receivable Concept (Monetary) As Of Debit tef:CurrentIncomeTaxesReceivable
2841 Other Concept (Monetary) As Of Debit tef:OtherTaxesReceivable
2842 Total Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
2843 2425409 - Disclosure - Income Tax Matters - Reconciliation of Profit (Details) Network

*

*

 http://www.telefonica.com/role/IncomeTaxMattersReconciliationOfProfitDetails
2844 Implied Table Table

*

*

 implied:Table
2845 Income Taxes [Abstract] Abstract tef:IncomeTaxesAbstract
2846 Accounting profit before tax Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
2847 Tax expense at prevailing statutory rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
2848 Permanent differences Concept (Monetary) For Period Debit tef:TaxEffectOfOtherPermanentDifferences
2849 Changes in deferred tax charge due to changes in tax rates Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
2850 (Capitalization)/reversal of tax deduction and tax relief Concept (Monetary) For Period Debit tef:ReversalCapitalizationOfTaxDeductionAndTaxRelief
2851 (Capitalization)/reversal of loss carryforwards Concept (Monetary) For Period Debit tef:ReversalCapitalizationOfLossCarryforwards
2852 (Increase)/decrease in tax expense arising from temporary differences Concept (Monetary) For Period Debit tef:IncreaseDecreaseInTaxExpenseDueToTemporaryDifferences
2853 Other Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
2854 Current tax expense Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
2855 Deferred tax expense/(benefit) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
2856 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2857 2426402 - Disclosure - Revenue and Expenses - Revenues (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesRevenuesDetails
2858 Implied Table Table

*

*

 implied:Table
2859 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2860 Rendering of services Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServices
2861 Sales Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
2862 Total Concept (Monetary) For Period Credit ifrs-full:Revenue
2863 2426403 - Disclosure - Revenue and Expenses - Other Income (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesOtherIncomeDetails
2864 Continuing And Discontinued Operations [Table] Table

*

*

 tef:ContinuingAndDiscontinuedOperationsTable
2865 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2866 Aggregate continuing and discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
2867 Telefónica Media Argentina, S.A. and Atlántida Comunicaciones, S.A. Member tef:TelefonicaMediaArgentinaS.A.andAtlantidaComunicacionesS.A.Member
2868 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
2869 Assets [member] Member ifrs-full:ClassesOfAssetsMember
2870 Telephone towers Member tef:TelephoneTowersMember
2871 Gains (Losses) in fair value of equity instruments Member tef:GainsLossesInFairValueOfEquityInstrumentsMember
2872 Continuing And Discontinued Operations [Line Items] LineItems tef:ContinuingAndDiscontinuedOperationsLineItems
2873 Own work capitalized Concept (Monetary) For Period Credit tef:IncomeFromCapitalizationOfOwnWork
2874 Gain on disposal of companies Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfInvestments
2875 Gain on disposal of other assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfOtherNoncurrentAssets
2876 Government grants Concept (Monetary) For Period Credit ifrs-full:RevenueFromGovernmentGrants
2877 Other operating income Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
2878 Total Concept (Monetary) For Period Credit ifrs-full:OtherIncome
2879 2426404 - Disclosure - Revenue and Expenses - Other Expenses (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesOtherExpensesDetails
2880 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2881 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2882 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2883 Gains (Losses) in fair value of equity instruments Member tef:GainsLossesInFairValueOfEquityInstrumentsMember
2884 Impairment of trade receivables measured at fair value through OCI Member tef:ImpairmentOfTradeReceivablesMeasuredAtFairValueThroughOCIMember
2885 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2886 Leases included in Other expenses Concept (Monetary) For Period Debit ifrs-full:RentalExpense
2887 Advertising Concept (Monetary) For Period Debit ifrs-full:SalesAndMarketingExpense
2888 Other external services Concept (Monetary) For Period Debit ifrs-full:ServicesExpense
2889 Taxes other than income tax Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
2890 Change in trade provisions Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables
2891 Losses on disposal of fixed assets and changes in provisions for fixed assets Concept (Monetary) For Period Debit tef:LossOnDisposalOfFixedAssetsAndChangesInProvisionsForFixedAssets
2892 Goodwill impairment (Note 7) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
2893 Other operating expenses Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
2894 Total Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
2895 Increase (reduction) to tax expense due to decisions with tax authorities Concept (Monetary) For Period Debit tef:IncreaseDecreaseInTaxExpenseDueToDecisionsWithTaxAuthorities
2896 2426405 - Disclosure - Revenue and Expenses - Estimated Payment Schedule (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesEstimatedPaymentScheduleDetails
2897 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
2898 Segments [axis] Axis ifrs-full:SegmentsAxis
2899 Segments [member] Member ifrs-full:SegmentsMember
2900 Telefónica Brazil Member tef:TelefonicaBrazilMember
2901 Telefónica Germany Member tef:TelefonicaGermanyMember
2902 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
2903 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
2904 Telefónica Spain Member tef:TelefonicaSpainMember
2905 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2906 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2907 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2908 Operating segments Member ifrs-full:OperatingSegmentsMember
2909 Others Member tef:OtherCompaniesAndEliminationsMember
2910 Maturity [axis] Axis ifrs-full:MaturityAxis
2911 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2912 Less than 1 year Member ifrs-full:NotLaterThanOneYearMember
2913 1 to 3 years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
2914 3 to 5 years Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
2915 More than 5 years Member ifrs-full:LaterThanFiveYearsMember
2916 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
2917 Operating lease obligations Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2918 Purchase and other contractual obligations Concept (Monetary) As Of Credit tef:PurchaseAndOtherContractualObligations
2919 Operating lease obligations, at present value Concept (Monetary) As Of Debit tef:ExpectedFutureMinimumLeasePaymentsReceivableUnderNonCancellableSubleasesClassifiedAsOperatingLeaseAtPresentValue
2920 2426406 - Disclosure - Revenue and Expenses - Headcount (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesHeadcountDetails
2921 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
2922 Segments [axis] Axis ifrs-full:SegmentsAxis
2923 Segments [member] Member ifrs-full:SegmentsMember
2924 Telefónica Spain Member tef:TelefonicaSpainMember
2925 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
2926 Telefónica Germany Member tef:TelefonicaGermanyMember
2927 Telefónica Brazil Member tef:TelefonicaBrazilMember
2928 Telefónica Hispam Norte Member tef:TelefnicaHispamNorteMember
2929 Telefónica Hispam Sur Member tef:TelefnicaHispamSurMember
2930 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
2931 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2932 Operating segments Member ifrs-full:OperatingSegmentsMember
2933 Others Member tef:OtherCompaniesAndEliminationsMember
2934 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
2935 Average employees over year Concept (Decimal) For Period ifrs-full:AverageNumberOfEmployees
2936 Employees at year-end Concept (Decimal) As Of ifrs-full:NumberOfEmployees
2937 Percentage of female employees Concept (Percent) As Of tef:PercentageOfFemaleEmployees
2938 Number of employees with disabilities Concept (Integer) As Of tef:NumberOfEmployeesWithDisabilities
2939 2426407 - Disclosure - Revenue and Expenses - Depreciation and Amortization (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesDepreciationAndAmortizationDetails
2940 Implied Table Table

*

*

 implied:Table
2941 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2942 Depreciation of property, plant and equipment (Note 8) Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
2943 Amortization of intangible assets (Note 6) Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
2944 Total Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
2945 2426408 - Disclosure - Revenue and Expenses - Data Used for Calculation of Basic and Diluted Earnings Per Share (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesDataUsedForCalculationOfBasicAndDilutedEarningsPerShareDetails
2946 Implied Table Table

*

*

 implied:Table
2947 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2948 Profit attributable to ordinary equity holders of parent Abstract ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityAbstract
2949 Profit attributable to ordinary equity holders of the parent from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntity
2950 Adjustment for the coupon corresponding to undated deeply subordinated securities Concept (Monetary) For Period Credit tef:AdjustmentForTheNetCouponCorrespondingToUndatedDeeplySubordinatedSecurities
2951 Tax effect Concept (Monetary) For Period Debit tef:Profitlossfromcontinuingoperationsattributabletoordinaryequityholdersofparententityincludingdilutiveeffectstaxeffect
2952 Adjustment for the financial expense of the debt component of the mandatorily convertible notes Concept (Monetary) For Period Credit tef:AdjustmentForFinancialExpenseOfDebtComponentOfMandatorilyConvertibleNotes
2953 Total profit attributable to ordinary equity holders of the parent for basic and diluted earnings per share from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
2954 Number of shares Abstract ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
2955 Weighted average number of ordinary shares (excluding treasury shares) for basic earnings per share Concept (Shares) For Period ifrs-full:WeightedAverageShares
2956 Adjustment for mandatorily convertible notes (in shares) Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
2957 Adjusted number of shares for basic earnings per share (excluding treasury shares) Concept (Shares) For Period tef:AdjustedWeightedAverageNumberOfOrdinarySharesOutstandingBasic
2958 Telefónica, S.A. share option plans (in shares) Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
2959 Weighted average number of ordinary shares outstanding for diluted earnings per share Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
2960 2426409 - Disclosure - Revenue and Expenses - Earnings Per Share (Details) Network

*

*

 http://www.telefonica.com/role/RevenueAndExpensesEarningsPerShareDetails
2961 Implied Table Table

*

*

 implied:Table
2962 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2963 Basic earnings per share (in euros per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
2964 Diluted earnings per share (in euros per share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
2965 2427402 - Disclosure - Share-Based Payment Plans - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/ShareBasedPaymentPlansNarrativeDetails
2966 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2967 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2968 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
2969 Performance and Investment Plan Member tef:PerformanceandInvestmentPlanMember
2970 Talent for the Future Share Plan 2014-2019 Member tef:TalentfortheFutureSharePlan20142019Member
2971 Global Employee Share Plan Member tef:GlobalEmployeeSharePlanMember
2972 Talent for the Future Share Plan 2018-2022 Member tef:TalentfortheFutureSharePlan20182022Member
2973 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2974 Delivery percent (fulfillment of TSR objective) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofFulfillmentofTotalShareholderReturnObjective
2975 Delivery percent (free cash flow generation, maximum compliance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofFreeCashFlowGeneration
2976 Award vesting period Concept (xbrli:durationItemType) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod1
2977 Number of independent phases Concept (Integer) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardNumberOfIndependentPhases
2978 Number of shares assigned (shares) Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
2979 Fair value of shares assigned (EUR per share) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
2980 Number of shares outstanding (shares) Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
2981 Maximum amount of shares an employee is allowed to purchase Concept (Monetary) For Period Credit tef:SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumAmountOfSharesAnEmployeeIsAllowedToPurchase
2982 Minimum amount an employee can expend to purchase shares Concept (Monetary) For Period Credit tef:SharebasedCompensationArrangementbySharebasedPaymentAwardMinimumAmountAnEmployeeCanExpendToPurchaseShares
2983 Number of shares to be received (shares) Concept (Shares) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardNumberOfSharesToBeReceived
2984 Number of employees registered Concept (Integer) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardNumberOfEmployeesRegistered
2985 Value of rewarded shares Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
2986 Maximum percentage to be issued free Concept (Percent) As Of tef:ShareBasedPaymentArrangementsMaximumPercentageToBeIssuedFree
2987 2427403 - Disclosure - Share-Based Payment Plans - Schedule of Number of Shares Assigned and Outstanding (Details) Network

*

*

 http://www.telefonica.com/role/ShareBasedPaymentPlansScheduleOfNumberOfSharesAssignedAndOutstandingDetails
2988 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
2989 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
2990 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
2991 Performance and Investment Plan Member tef:PerformanceandInvestmentPlanMember
2992 Talent for the Future Share Plan 2018-2022 Member tef:TalentfortheFutureSharePlan20182022Member
2993 Share-Based Payment Arrangement Tranche [Axis] Axis tef:ShareBasedPaymentArrangementTrancheAxis
2994 Share-Based Payment Arrangement Tranche [Domain] Member tef:ShareBasedPaymentArrangementTrancheDomain
2995 TSR Objective Member tef:TSRObjectiveMember
2996 FCF Objective Member tef:FCFObjectiveMember
2997 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
2998 No. of shares assigned (shares) Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
2999 Outstanding shares (shares) Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
3000 Unit fair value Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
3001 2428402 - Disclosure - Cash Flow Analysis - Operating Activities (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisOperatingActivitiesDetails
3002 Implied Table Table

*

*

 implied:Table
3003 Cash Flow Statement [Abstract] Abstract tef:CashFlowStatementAbstract
3004 Cash received from operations Concept (Monetary) For Period Debit tef:ReceiptsFromOperations
3005 Cash paid from operations Concept (Monetary) For Period Credit tef:PaymentsForOperations
3006 Cash paid to suppliers Concept (Monetary) For Period Credit ifrs-full:PaymentsToSuppliersForGoodsAndServices
3007 Cash paid to employees Concept (Monetary) For Period Credit ifrs-full:PaymentsToAndOnBehalfOfEmployees
3008 Payments related to cancellation of commitments Concept (Monetary) For Period Credit ifrs-full:OtherCashPaymentsFromOperatingActivities
3009 Net payments of interest and other financial expenses net of dividends received Concept (Monetary) For Period Credit tef:PaymentsOfInterestAndOtherFinancialExpensesNetOfDividendsReceived
3010 Net interest and other financial expenses paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
3011 Dividends received Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
3012 Taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
3013 Net cash flow provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
3014 2428403 - Disclosure - Cash Flow Analysis - Investing Activities (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisInvestingActivitiesDetails
3015 Disclosure of geographical areas [table] Table

*

*

 ifrs-full:DisclosureOfGeographicalAreasTable
3016 Geographical [Axis] Axis srt:StatementGeographicalAxis
3017 Geographical [Domain] Member srt:SegmentGeographicalDomain
3018 United Kingdom Member country:GB
3019 Colombia Member country:CO
3020 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
3021 Proceeds from the sale in property, plant and equipment and intangible assets Concept (Monetary) For Period Debit tef:ProceedsFromSalesOfPropertyPlantAndEquipmentAndIntangiblesClassifiedAsInvestingActivities
3022 Payments on investments in property, plant and equipment and intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets
3023 (Payments on investments)/proceeds from the sale in property, plant and equipment and intangible assets, net Concept (Monetary) For Period Debit tef:ProceedsFromPurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsClassifiedAsInvestingActivitiesNet
3024 Spectrum license payments Concept (Monetary) For Period Credit tef:PaymentsToAcquireIntangibleAssets1
3025 2428404 - Disclosure - Cash Flow Analysis - Investing Activities, Proceeds and Payments on Companies (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisInvestingActivitiesProceedsAndPaymentsOnCompaniesDetails
3026 Continuing And Discontinued Operations [Table] Table

*

*

 tef:ContinuingAndDiscontinuedOperationsTable
3027 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
3028 Aggregate continuing and discontinued operations [member] Member ifrs-full:DiscontinuedOperationsMember
3029 Televisión Federal S.A.- TELEFE Provision and operation TV and radio broadcasting-services Member tef:TelevisionFederalS.A.Member
3030 Telefónica United Kingdom Member tef:TelefonicaUnitedKingdomMember
3031 Telefonica Telecomunicaciones Publicas, S.A.U. Member tef:TelefonicaTelecomunicacionesPublicasSAUMember
3032 Axonix Ltd and Telefonica Digital Inc. Member tef:AxonixLtdAndTelefonicaDigitalInc.Member
3033 Other companies Member tef:OtherCompaniesMember
3034 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
3035 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
3036 DTS Member tef:DTSMember
3037 Coltel affiliates Member tef:ColtelAffiliatesMember
3038 Minodes GmbH Member tef:MinodesGmbHMember
3039 Co-trade GmbH Member tef:CotradeGmbHMember
3040 Other companies Member tef:OtherCompaniesMember
3041 Continuing And Discontinued Operations [Line Items] LineItems tef:ContinuingAndDiscontinuedOperationsLineItems
3042 Proceeds on disposals of companies, net of cash and cash equivalents disposed Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
3043 Payments on investments in companies, net of cash and cash equivalents acquired Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
3044 2428405 - Disclosure - Cash Flow Analysis - Investing Activities, Proceeds and Payments on Financial Investments (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisInvestingActivitiesProceedsAndPaymentsOnFinancialInvestmentsDetails
3045 Disclosure of associates [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
3046 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
3047 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
3048 Indra Member tef:IndraMember
3049 China Unicom Member tef:ChinaUnicomBroadbanOnlineLimitedCorp.Member
3050 Seguros de Vida y Pensiones Antares, S.A. Life insurance, pensions and health insurance Member tef:SegurosdeVidayPensionesAntaresSAMember
3051 Shortcut I GmbH & Co. KG Technological innovation based business project development Member tef:ShortcutIGmbHCo.KGMember
3052 Other Associates Member tef:OtherAssociatesMember
3053 Investment [Axis] Axis invest:InvestmentAxis
3054 Investment [Domain] Member invest:InvestmentDomain
3055 Legal deposits Member tef:LegalDepositsMember
3056 Mediaset Premium Member tef:MediasetPremiumMember
3057 Long-term deposits Member tef:LongtermdepositsMember
3058 Collateral guarantees on derivatives Member tef:CollateralguaranteesonderivativesMember
3059 Other Investments Member tef:OtherInvestmentMember
3060 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
3061 Proceeds on financial investments not included under cash equivalents Concept (Monetary) For Period Debit tef:ProceedsFromFinancialInvestmentsNotIncludedUnderCashEquivalents
3062 Payments on financial investments not included under cash equivalents Concept (Monetary) For Period Credit tef:PaymentsForFinancialInvestmentsNotIncludedUnderCashEquivalents
3063 2428406 - Disclosure - Cash Flow Analysis - Financing Activities, Dividends and Shares (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisFinancingActivitiesDividendsAndSharesDetails
3064 Dividends [Table] Table

*

*

 tef:DividendsTable
3065 Dividends [Axis] Axis tef:Dividends1Axis
3066 Dividends [Domain] Member tef:Dividends1Domain
3067 Dividends paid by Telefonica, S.A. Member tef:DividendsPaidByTelefonicaS.A.Member
3068 Non-controlling interests in Telefonica Brasil, S.A. Member tef:NoncontrollingInterestsInTelefonicaBrasilS.A.Member
3069 Non-controlling interests of Telefonica Deutschland Member tef:NoncontrollingInterestsOfTelefonicaDeutschlandMember
3070 Noncontrolling interest of Telefonica Centroamerica Member tef:NoncontrollingInterestOfTelefonicaCentroamericaMember
3071 Non-controlling Interests Of Telxius Telecom, S.A. y Pontel Participaciones, S.L. [Member] Member tef:NoncontrollingInterestsOfTelxiusTelecomS.A.yPontelParticipacionesS.L.Member
3072 Other Dividends Member tef:OtherDividendsMember
3073 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3074 Counterparties [member] Member ifrs-full:CounterpartiesMember
3075 Telefonica Brasil S.A. Member tef:TelefonicaBrasilS.A.Member
3076 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3077 Telefónica Deutschland Holding, A.G. Member tef:TelefonicaDeutschlandHoldingMember
3078 Others Member ifrs-full:IndividuallyInsignificantCounterpartiesMember
3079 Classes of entity's own equity instruments [axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
3080 Entity's own equity instruments [member] Member ifrs-full:EntitysOwnEquityInstrumentsMember
3081 Undated deeply subordinated securities Member tef:UndatedDeeplySubordinatedSecuritiesMember
3082 Coupon related to undated deeply subordinated securities Member tef:CouponRelatedToUndatedDeeplySubordinatedSecuritiesMember
3083 Dividends [Line Items] LineItems tef:DividendsLineItems
3084 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
3085 Proceeds from share capital increase Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
3086 Proceeds/(payments) of treasury shares and other operations with shareholders and with minority interests Concept (Monetary) For Period Debit tef:ProceedsFromPaymentsForTreasurySharesAndOtherShareholderOperations
3087 Operations with other equity holders Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingOtherEquityInstruments
3088 Acquisition of undated deeply subordinated securities (Note 15) Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
3089 Payments for equity Concept (Monetary) For Period Credit ifrs-full:PaymentsOfOtherEquityInstruments
3090 2428407 - Disclosure - Cash Flow Analysis - Financing Activities, Debt (Details) Network

*

*

 http://www.telefonica.com/role/CashFlowAnalysisFinancingActivitiesDebtDetails
3091 Disclosure of fair value measurement of equity [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfEquityTable
3092 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3093 Counterparties [member] Member ifrs-full:CounterpartiesMember
3094 Pontegadea Group Member tef:PontegadeaGroupMember
3095 Legal Entity [Axis] Axis dei:LegalEntityAxis
3096 Entity [Domain] Member dei:EntityDomain
3097 KKR Member tef:KohlbergKravisRobertsCo.L.P.KKRMember
3098 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3099 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3100 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3101 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
3102 Classes of entity's own equity instruments [axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
3103 Entity's own equity instruments [member] Member ifrs-full:EntitysOwnEquityInstrumentsMember
3104 Telefonica Emisiones EMTN Bond Member tef:TelefonicaEmisionesEMTNBondMember
3105 Telefonica Participaciones Convertible Debentures Member tef:TelefonicaParticipacionesConvertibleDebenturesMember
3106 SHELF program of Telefonica Emisiones, S.A.U. Member tef:TelefonicaEmisionesShelfProgramMember
3107 Telefónica Brazil Member tef:TelefonicaBrazilMember
3108 O2 Telefónica Deutschland Finanzierungs, GmbH Member tef:O2TelefonicaDeutschlandFinanzierungsGmbHMember
3109 Other equity instruments Member ifrs-full:OtherEquitySecuritiesMember
3110 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
3111 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
3112 Syndicated facility due February 15, 2019 Member tef:SyndicatedFacilityDueFebruary152019Member
3113 Syndicated facility due February 19, 2022 Member tef:SyndicatedFacilityDueFebruary192022Member
3114 Syndicated facility due February 18, 2021 Member tef:SyndicatedFacilityDueFebruary182021Member
3115 Structured financing Member tef:StructuredfinancingMember
3116 Bilateral loans of TSA Member tef:BilateralLoansMember
3117 Syndicated loan of Telefonica Germany Member tef:SyndicatedloanofTelefonicaGermanyMember
3118 Syndicated loan of Telxius Telecom, S.A. Member tef:SyndicatedLoanOfTelxiusTelecomS.A.Member
3119 Debt hedging derivatives Member tef:DebtHedgingDerivativesMember
3120 Loans paid by GVT Member tef:LoansPaidbyGlobalVillageTelecomMember
3121 Others Member tef:OtherDebtInstrumentsMember
3122 Disclosure of fair value measurement of equity [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfEquityLineItems
3123 Proceeds on issue of debentures and bonds and other debts Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures
3124 Proceeds on loans, borrowings and promissory notes Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
3125 Cancellation of debentures and bonds, and other debts Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBondsNotesAndDebentures
3126 Repayments of loans, borrowings and promissory notes Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
3127 Financed spectrum licenses payments Concept (Monetary) For Period Credit tef:PaymentsOfSpectrumLicenses
3128 Payments to suppliers with extended payment terms Concept (Monetary) For Period Credit tef:TradeAndOtherPayablesDeferredPayments
3129 Financed operating payments and investments in property, plant and equipment and intangible assets payments Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
3130 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
3131 Proportion of share capital acquired (as a percent) Concept (Percent) As Of tef:PercentageOfShareCapitalAcquired
3132 Proportion of voting equity transferred (as a percent) Concept (Percent) As Of tef:PercentageOfVotingEquityTransferedAsConsideration
3133 2429402 - Disclosure - Other Information - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/OtherInformationNarrativeDetails
3134 Disclosure of contingent liabilities [table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
3135 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
3136 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
3137 EMTN Notes due February 5, 2024 Member tef:EMTNNotesDueFebruary52024Member
3138 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
3139 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
3140 Disposal of major subsidiary Member ifrs-full:DisposalOfMajorSubsidiaryMember
3141 Entering into significant commitments Member ifrs-full:EnteringIntoSignificantCommitmentsOrContingentLiabilitiesMember
3142 Legal Entity [Axis] Axis dei:LegalEntityAxis
3143 Entity [Domain] Member dei:EntityDomain
3144 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3145 Corporacion Multi Inversiones, SA Member tef:CorporacionMultiInversionesSAMember
3146 Telefónica Emisiones, S.A.U. Member tef:TelefonicaEmisionesS.A.U.Member
3147 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3148 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3149 Telefónica Centroamericana Inversiones, S.L. Member tef:TelefonicaCentroamericanaInversionesMember
3150 Telefónica Moviles El Salvador Member tef:TelefonicaMovilesElSalvadorMember
3151 Telefónica Móviles Panamá, S.A. Member tef:TelefonicaMovilesPanamaMember
3152 Telefonía Celular de Nicaragua, S.A. Member tef:TelefonicaCelulardeNicaraguaMember
3153 Telefónica de Costa Rica TC, S.A. Member tef:TelefonicadeCostaRicaMember
3154 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
3155 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
3156 Legal proceedings contingent liability Member ifrs-full:LegalProceedingsContingentLiabilityMember
3157 Range [axis] Axis ifrs-full:RangeAxis
3158 Ranges [member] Member ifrs-full:RangesMember
3159 Maximum Member ifrs-full:TopOfRangeMember
3160 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3161 Counterparties [member] Member ifrs-full:CounterpartiesMember
3162 Venten Management Limited Member tef:VentenManagementLimitedMember
3163 Lexburg Enterprises Limited Member tef:LexburgEnterprisesLimitedMember
3164 Entel Member tef:EntelMember
3165 ANATEL Member tef:ANATELMember
3166 America Movil, SAB de CV Member tef:AmericaMovilSABdeCVMember
3167 Millicom International Cellular, S.A. Member tef:MillicomInternationalCellularS.A.Member
3168 Joint operations [axis] Axis ifrs-full:JointOperationsAxis
3169 Entity's total for joint operations [member] Member ifrs-full:EntitysTotalForJointOperationsMember
3170 Telefonica Open Future, SLU Member tef:TelefonicaOpenFutureSLUMember
3171 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3172 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3173 Board of Directors Member tef:BoardOfDirectorsMember
3174 Executive Commission Member tef:ExecutiveCommissionMember
3175 Title Of Individual 1 [Axis] Axis tef:TitleOfIndividual1Axis
3176 Title Of Individual With Relationship To Entity 1 [Domain] Member tef:TitleOfIndividualWithRelationshipToEntity1Domain
3177 Mr. Jose Maria Alvarez-Pallete Lopez, Executive Chairman Member tef:BoardOfDirectorsChairman1Member
3178 Mr. Angel Vila Boix, Chief Operating Officer Member tef:ChiefOperatingOfficerMember
3179 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
3180 Proportion of interconnection revenues from contingent legal claim Concept (Percent) As Of tef:ProportionofInterconnectionRevenuesContingentLiabilities
3181 Estimated financial effect of contingent liabilities Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
3182 Interest rate set on legal proceedings contingent liability Concept (Percent) For Period tef:InterestRateSetOnLegalProceedingsContingentLiability
3183 Framework Investment Agreement, payment obligation terms, percent of increase in EBITDA Concept (Percent) As Of tef:InvestmentRepurchaseAgreementPaymentObligationTermsProportionOfIncreaseInEarningsBeforeInterestTaxesDepreciationAndAmortization
3184 Framework Investment Agreement, payment obligation terms, percent of capital investments exceeding revenues Concept (Percent) As Of tef:InvestmentRepurchaseAgreementPaymentObligationTermsProportionOfMaximumCapitalInvestmentsExceedingRevenue
3185 Contractual capital commitments Concept (Monetary) As Of Credit ifrs-full:ContractualCapitalCommitments
3186 Contractual Capital Commitment Period Concept (xbrli:durationItemType) For Period tef:ContractualCapitalCommitmentPeriod
3187 Share purchase agreement, price of settlement Concept (Monetary) As Of Debit tef:SharePurchaseAgreementSettlementPaymentOrReceipt
3188 Services agreement amount Concept (Monetary) As Of Debit tef:ServicesAgreementAmount
3189 Cost of award for broadcasting rights Concept (Monetary) As Of Debit tef:CostofAwardforBroadcastingRights
3190 Cost of award for broadcasting rights per season Concept (Monetary) As Of Debit tef:CostofAwardforBroadcastingRightsperSeason
3191 Proportion of ownership interest (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
3192 Proportion of ownership interest in associate sold (as a percent) Concept (Percent) As Of tef:ProportionOfOwnershipInterestInAssociateSold
3193 Notes and debentures issued Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
3194 Proportion of entity having Environmental Management Systems (EMS) Concept (Percent) As Of tef:ProportionOfEntityWithEnvironmentalManagementSystems
3195 Proceeds from exchange of share capital Concept (Monetary) For Period Debit tef:ProceedsFromExchangeOfShareCapital
3196 Directors' remuneration expense Concept (Monetary) For Period Debit ifrs-full:DirectorsRemunerationExpense
3197 Total executive compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
3198 Proportionate increase (decrease) in compensation from prior year Concept (Percent) For Period tef:KeyManagementPersonnelCompensationProportionateIncreaseDecreaseFromPriorYear
3199 2429403 - Disclosure - Other Information - Auditors' Fees (Details) Network

*

*

 http://www.telefonica.com/role/OtherInformationAuditorsFeesDetails
3200 Auditors Remuneration [Table] Table

*

*

 tef:AuditorsRemunerationTable
3201 Auditor Name [Axis] Axis tef:AuditorNameAxis
3202 Auditor Name [Domain] Member tef:AuditorNameDomain
3203 Ernst & Young Member tef:ErnstYoungMember
3204 Other Auditors Member tef:OtherAuditorsMember
3205 Auditors Remuneration [Line Items] LineItems tef:AuditorsRenumerationLineItems
3206 Audit services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForAuditServices
3207 Audit-related services Concept (Monetary) For Period Debit tef:AuditorsRemunerationForAuditRelatedServices
3208 Tax services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForTaxServices
3209 All other services (consulting, advisory, etc.) Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForOtherServices
3210 Total Concept (Monetary) For Period Debit ifrs-full:AuditorsRemuneration
3211 2429404 - Disclosure - Other Information - Executive Compensation (Details) Network

*

*

 http://www.telefonica.com/role/OtherInformationExecutiveCompensationDetails
3212 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3213 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3214 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3215 Board of Directors Member tef:BoardOfDirectorsMember
3216 Executive Commission Member tef:ExecutiveCommissionMember
3217 Advisory or Control Committees Member tef:AdvisoryOrControlCommitteesMember
3218 Title Of Individual 1 [Axis] Axis tef:TitleOfIndividual1Axis
3219 Title Of Individual With Relationship To Entity 1 [Domain] Member tef:TitleOfIndividualWithRelationshipToEntity1Domain
3220 Chairman Member tef:BoardOfDirectorsChairman1Member
3221 Vice chairman Member tef:ViceChairmanMember
3222 Executive Member Member tef:ExecutiveOfficer1Member
3223 Proprietary Member Member tef:ProprietaryOfficerMember
3224 Independent Member Member tef:IndependentOfficerMember
3225 Other external Member tef:OtherExternalPositionMember
3226 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3227 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
3228 2430402 - Disclosure - Finance Leases - Lessee (Details) Network

*

*

 http://www.telefonica.com/role/FinanceLeasesLesseeDetails
3229 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
3230 Segments [axis] Axis ifrs-full:SegmentsAxis
3231 Segments [member] Member ifrs-full:SegmentsMember
3232 Telefónica Brazil Member tef:TelefonicaBrazilMember
3233 Telefónica Germany Member tef:TelefonicaGermanyMember
3234 Maturity [axis] Axis ifrs-full:MaturityAxis
3235 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3236 Within one year Member ifrs-full:NotLaterThanOneYearMember
3237 From one to five years Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
3238 More than 5 years Member ifrs-full:LaterThanFiveYearsMember
3239 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
3240 Present value Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
3241 Revaluation Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
3242 Pending payment Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
3243 Net assets under finance lease agreements Concept (Monetary) As Of Debit ifrs-full:RecognisedFinanceLeaseAsAssets
3244 2430403 - Disclosure - Finance Leases - Lessor (Details) Network

*

*

 http://www.telefonica.com/role/FinanceLeasesLessorDetails
3245 Disclosure of finance lease and operating lease by lessor [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorTable
3246 Segments [axis] Axis ifrs-full:SegmentsAxis
3247 Segments [member] Member ifrs-full:SegmentsMember
3248 Telefónica Brazil Member tef:TelefonicaBrazilMember
3249 Maturity [axis] Axis ifrs-full:MaturityAxis
3250 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3251 Within one year Member ifrs-full:NotLaterThanOneYearMember
3252 From one to five years Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
3253 Disclosure of finance lease and operating lease by lessor [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorLineItems
3254 Present value Concept (Monetary) As Of Debit ifrs-full:MinimumFinanceLeasePaymentsReceivableAtPresentValue
3255 Revaluation Concept (Monetary) As Of Debit tef:RevaluationofMinimumFinanceLeasePaymentsReceivable
3256 Pending receivables Concept (Monetary) As Of Debit ifrs-full:GrossInvestmentInFinanceLease
3257 Accumulated allowance Concept (Monetary) As Of Credit ifrs-full:AccumulatedAllowanceForUncollectibleMinimumLeasePaymentsReceivable
3258 Total after accumulated allowance Concept (Monetary) As Of Debit ifrs-full:UnearnedFinanceIncomeOnFinanceLease
3259 2431402 - Disclosure - Operations Classified as Held for Sale - Balance Sheet Breakdown Of Asset Held For Sale And Liabilities Assumed (Details) Network

*

*

 http://www.telefonica.com/role/OperationsClassifiedAsHeldForSaleBalanceSheetBreakdownOfAssetHeldForSaleAndLiabilitiesAssumedDetails
3260 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
3261 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3262 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3263 Antares Member tef:SegurosdeVidayPensionesAntaresMember
3264 Telefónica Móviles Guatemala Member tef:TelefnicaMvilesGuatemalaMember
3265 Telefónica Móviles El Salvador Member tef:TelefnicaMvilesElSalvadorMember
3266 Other companies Member tef:OtherSubsidiariesMember
3267 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
3268 Non-current assets classified as held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
3269 Liabilities associated with non-current assets classified as held for sale Concept (Monetary) As Of Credit ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
3270 2431403 - Disclosure - Operations Classified as Held for Sale - Additional Information (Details) Network

*

*

 http://www.telefonica.com/role/OperationsClassifiedAsHeldForSaleAdditionalInformationDetails
3271 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
3272 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3273 Counterparties [member] Member ifrs-full:CounterpartiesMember
3274 America Movil, SAB de CV Member tef:AmericaMovilSABdeCVMember
3275 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
3276 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
3277 Disposal of major subsidiary Member ifrs-full:DisposalOfMajorSubsidiaryMember
3278 Legal Entity [Axis] Axis dei:LegalEntityAxis
3279 Entity [Domain] Member dei:EntityDomain
3280 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3281 Corporacion Multi Inversiones, SA Member tef:CorporacionMultiInversionesSAMember
3282 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3283 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3284 Antares Member tef:SegurosdeVidayPensionesAntaresMember
3285 Telefónica Centroamericana Inversiones, S.L. Member tef:TelefonicaCentroamericanaInversionesMember
3286 Telefónica Moviles El Salvador Member tef:TelefonicaMovilesElSalvadorMember
3287 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
3288 Disposal group consideration received Concept (Monetary) As Of Debit tef:DisposalGroupIncludingDiscontinuedOperationConsideration1
3289 Proportion of ownership interest (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
3290 Proportion of ownership interest in associate sold (as a percent) Concept (Percent) As Of tef:ProportionOfOwnershipInterestInAssociateSold
3291 2431404 - Disclosure - Operations Classified as Held for Sale - Breakdown Of Assets Held For Sale And Liabilities Assumed (Details) Network

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*

 http://www.telefonica.com/role/OperationsClassifiedAsHeldForSaleBreakdownOfAssetsHeldForSaleAndLiabilitiesAssumedDetails
3292 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
3293 Assets and liabilities classified as held for sale [axis] Axis ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
3294 Assets and liabilities classified as held for sale [member] Member ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
3295 Disposal groups classified as held for sale Member ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
3296 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3297 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3298 Antares Member tef:SegurosdeVidayPensionesAntaresMember
3299 Telefónica Móviles Guatemala Member tef:TelefnicaMvilesGuatemalaMember
3300 Telefónica Móviles El Salvador Member tef:TelefnicaMvilesElSalvadorMember
3301 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
3302 NON-CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
3303 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
3304 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
3305 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
3306 Non-current financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
3307 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
3308 CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
3309 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
3310 Receivables and other current assets Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
3311 Tax receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
3312 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
3313 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
3314 NON-CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
3315 Non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
3316 Payables and other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
3317 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
3318 Non-current provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
3319 CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
3320 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
3321 Payables and other-current liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
3322 Current tax payables Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
3323 Current provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
3324 2432401 - Disclosure - Events After the Reporting Period - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/EventsAfterReportingPeriodNarrativeDetails
3325 Entities [Table] Table

*

*

 dei:EntitiesTable
3326 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3327 Counterparties [member] Member ifrs-full:CounterpartiesMember
3328 America Movil, SAB de CV Member tef:AmericaMovilSABdeCVMember
3329 Grupo Catalana Occidente Member tef:GrupoCatalanaOccidenteMember
3330 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3331 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3332 Telefónica Centroamericana Inversiones, S.L. Member tef:TelefonicaCentroamericanaInversionesMember
3333 Telefónica Moviles Guatemala & Telefónica Moviles El Salvador Member tef:TelefonicaMovilesGuatemelaandTelefonicaMovilesElSalvadorMember
3334 Telefónica Moviles El Salvador Member tef:TelefonicaMovilesElSalvadorMember
3335 Telefónica Moviles Guatemala Member tef:TelefonicaMovilesGuatemalaMember
3336 Antares Member tef:AntaresSAMember
3337 Telefonica Moviles Panama & Telefonica Celular de Nicaragua & Telefonica de Costa Rica Member tef:TelefonicaMovilesPanamaTelefonicaCelulardeNicaraguaTelefonicadeCostaRicaMember
3338 Telefónica de Costa Rica TC, S.A. Member tef:TelefonicadeCostaRicaMember
3339 Telefónica Móviles Panamá, S.A. Member tef:TelefonicaMovilesPanamaMember
3340 Telefonía Celular de Nicaragua, S.A. Member tef:TelefonicaCelulardeNicaraguaMember
3341 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
3342 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
3343 Repayments of debt Member tef:RepaymentsofdebtMember
3344 Disposal of major subsidiary Member ifrs-full:DisposalOfMajorSubsidiaryMember
3345 Redemption of notes Member tef:RedemptionofnotesMember
3346 Entering into significant commitments Member ifrs-full:EnteringIntoSignificantCommitmentsOrContingentLiabilitiesMember
3347 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
3348 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
3349 Bilateral Loan due July 22, 2019 Member tef:BilateralLoanDueJuly222019Member
3350 TELEF. EMISIONES JANUARY 2017 Member tef:TELEF.EMISIONESJANUARY20171Member
3351 EMTN Notes due February 5, 2024 Member tef:EMTNNotesDueFebruary52024Member
3352 Bilateral loan due June 26, 2019 Member tef:BilateralLoanDueJune262019Member
3353 Legal Entity [Axis] Axis dei:LegalEntityAxis
3354 Entity [Domain] Member dei:EntityDomain
3355 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3356 Corporacion Multi Inversiones, SA Member tef:CorporacionMultiInversionesSAMember
3357 Telefónica Emisiones, S.A.U. Member tef:TelefonicaEmisionesS.A.U.Member
3358 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
3359 Early repayment of debt Concept (Monetary) As Of Debit tef:EarlyRepaymentofDebt
3360 Proportion of ownership interest (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
3361 Proportion of ownership interest in associate sold (as a percent) Concept (Percent) As Of tef:ProportionOfOwnershipInterestInAssociateSold
3362 Proceeds from exchange of share capital Concept (Monetary) For Period Debit tef:ProceedsFromExchangeOfShareCapital
3363 Payments to redeem notes Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
3364 Notes and debentures issued Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
3365 Interest rate (as a percent) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
3366 Proportion of par value at issuance of debt instrument (as a percent) Concept (Percent) As Of tef:Percentofparvalueatissuanceofdebtinstrument
3367 Proportion of voting equity transferred (as a percent) Concept (Percent) As Of tef:PercentageOfVotingEquityTransferedAsConsideration
3368 Period of management of insurance policies Concept (xbrli:durationItemType) For Period tef:PeriodofManagementofInsurancePoliciesafterSaleofSubsidiary
3369 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
3370 2432402 - Disclosure - Events After the Reporting Period - Assets and Liabilities (Details) Network

*

*

 http://www.telefonica.com/role/EventsAfterReportingPeriodAssetsAndLiabilitiesDetails
3371 Entities [Table] Table

*

*

 dei:EntitiesTable
3372 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3373 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3374 Telefónica Móviles Panamá, S.A. Member tef:TelefonicaMovilesPanamaMember
3375 Telefonía Celular de Nicaragua, S.A. Member tef:TelefonicaCelulardeNicaraguaMember
3376 Telefónica de Costa Rica TC, S.A. Member tef:TelefonicadeCostaRicaMember
3377 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
3378 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
3379 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
3380 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
3381 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
3382 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
3383 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
3384 2433402 - Disclosure - Appendix I: Scope of Consolidation - Main Consolidated Companies of the Telefonica Group (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIScopeOfConsolidationMainConsolidatedCompaniesOfTelefonicaGroupDetails
3385 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
3386 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3387 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3388 Telefónica de España, S.A.U. Telecommunications service provider Member tef:TelefonicadeEspanaMember
3389 Telefónica Móviles España, S.A.U. Wireless communications services provider Member tef:TelefonicaMovilesEspanaMember
3390 Acens Technologies, S.L. Holding housing and telecommunications solutions Service provider Member tef:AcensTechnologiesMember
3391 Teleinformática y Comunicaciones, S.A.U. (Telyco) Promotion, marketing and distribution of telephone and telematic equipment and services Member tef:TeleinformaticayComunicacionesMember
3392 Telefónica Soluciones de Informática y Com. de España S.A.U. Telecommunications systems, networks and infrastructure engineering Member tef:TelefonicaSolucionesdeInformaticayCom.deEspanaMember
3393 Telefónica Soluciones de Outsourcing, S.A. Promotion and networks management Member tef:TelefonicaSolucionesdeOutsourcingMember
3394 Telefónica Servicios Integrales de Distribución S.A.U. Logistic service provider Member tef:TelefonicaServiciosIntegralesdeDistribucionMember
3395 DTS Distribuidora de Televisión Digital, S.A. Broacasting satellite TV signal transmission and linkage services Member tef:DistribuidoradeTelevisionDigitalS.A.Member
3396 Telefónica Servicios Audiovisuales, S.A.U. Provision of all type of audiovisual telecommunications services Member tef:TelefonicaServiciosAudiovisualesMember
3397 Telefónica Broadcast Services, S.L.U. DSNG-based transmission and operation services Member tef:TelefonicaBroadcastServicesMember
3398 Telefónica Audiovisual Digital, S.L.U. Provision of all type of audiovisual telecommunications services Member tef:TelefonicaAudiovisualDigitalSLUMember
3399 Compañía Independiente de Televisión, S.L. Provision of all type of audiovisual telecommunications services Member tef:CompaniaIndependientedeTelevisionSLMember
3400 Telefónica Europe plc Holding company Member tef:TelefonicaEuropeMember
3401 MmO2 plc Holding company Member tef:MmO2HoldingMember
3402 O2 Holdings Ltd Holding company Member tef:O2HoldingsMember
3403 Telefónica United Kingdom Ltd. Wireless communications Member tef:TelefonicaUnitedKingdomLimitedMember
3404 Giffgaff Ltd Wireless communications services provider Member tef:GiffgaffLtdMember
3405 O2 Networks Ltd. Holding company Member tef:O2NetworksHoldingsMember
3406 Cornerstone Telecommunications Network sharing Member tef:CornerstoneTelecomunicationsMember
3407 Telefónica Deutschland Holding A.G Holding company Member tef:TelefonicaDeutschlandHoldingMember
3408 Telefónica Germany GmbH & Co. OHG Wireless communications services operator Member tef:TelefonicaGermanyGmbHCoOHGMember
3409 E-Plus Services GmbH Wireless communications services operator Member tef:EPlusMember
3410 Telefónica Germany Next GmbH Technological and consulting services in Big Data provider Member tef:TelefonicaGermanyNextGmbHMember
3411 Minodes GmbH Technological and consulting services in Big Data provider Member tef:MinodesGmbHMember
3412 Telefônica Brasil, S.A. Wireline telephony operator Member tef:TelefonicaBrazilMember
3413 Terra Networks Brasil, S.A. ISP and portal Member tef:TerraNetworksBrasilMember
3414 Telefónica Venezolana, C.A. Wireless communications operator Member tef:TelefonicaVenezolanaMember
3415 Telefonica del Peru Member tef:TelefonicadelPeruMember
3416 Colombia Telecomunicaciones, S.A. ESP Communications services operator Member tef:ColombiaTelecomunicacionesMember
3417 Empresa de Telecomunicaciones de Bucaramanga S.A. E.S.P Communications services operator Member tef:EmpresadeTelecomunicacionesdeBucaramangaS.A.E.S.P.Member
3418 Metropolitana de Telecomunicaciones S.A E.S.P Communications services operator Member tef:MetropolitanadeTelecomunicacionesS.A.E.S.P.Member
3419 Operaciones Tecnológicas y Comerciales S.A.S Communications services operator Member tef:OperacionesTecnologicasyComercialesS.A.S.Member
3420 Telefónica Móviles México, S.A. de C.V. Holding Company Member tef:TelefonicaMovilesMexicoMember
3421 Telefónica Móviles Panamá, S.A. Wireless telephony services Member tef:TelefonicaMovilesPanamaMember
3422 Telefonía Celular de Nicaragua, S.A. Wireless telephony services Member tef:TelefonicaCelulardeNicaraguaMember
3423 Otecel, S.A. Wireless communications services provider Member tef:OtecelMember
3424 Telefónica de Costa Rica TC, S.A. Wireless communications Member tef:TelefonicadeCostaRicaMember
3425 Telefónica de Argentina, S.A. Telecommunications service provider Member tef:TelefonicadeArgentinaSAMember
3426 Telefonica Moviles Argentina Holding Member tef:TelefonicaMovilesArgentinaHoldingMember
3427 Telefónica Móviles Argentina, S.A. Telecommunications service provider Member tef:TelefonicaMovilesArgentinaS.A.Member
3428 Telefónica Móviles Chile, S.A. Wireless communications services operator Member tef:TelefonicaMovilesChileS.A.Member
3429 Telefónica Chile, S.A. Local and international long distance telephony services provider Member tef:TelefonicaChileS.A.Member
3430 Telefónica del Perú, S.A.A. Local, domestic and international long distance telephone service provider Member tef:TelefonicadelPeruSAAMember
3431 Telefónica Móviles del Uruguay, S.A. Wireless communications and services operator Member tef:TelefonicaMovilesdelUruguaySAMember
3432 O2 International Holdings Ltd. Holding company Member tef:O2InternationalHoldingsMember
3433 Telefónica Germany Holdings Ltd. Holding company Member tef:TelefonicaGermanyHoldingsMember
3434 O2 (Europe) Ltd. Holding company Member tef:O2EuropeLimitedMember
3435 Telefonica International Holding Member tef:TelefonicaInternationalHoldingMember
3436 Telefonica Latinoamerica Holding Member tef:TelefonicaLatinoamericaHoldingMember
3437 Pontel Participaciones, S.L. Holding company Member tef:PontelParticipacionesSLMember
3438 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
3439 Telxius Cable América, S.A. Provision of high bandwidth communications services Member tef:TelxiusCableAmericaS.A.Member
3440 Telxius Cable España, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusCableEspanaMember
3441 Telxius Cable República Dominicana, S.A.S. Operation and deployment of telecommunications infraestructure Member tef:TelxiusCableRepublicaDominicanaS.A.S.Member
3442 Telxius Cable Argentina, S.A. Operation and deployment of telecommunications infraestructure Member tef:TelxiusCableArgentinaS.A.Member
3443 Telxius Cable Panamá, S.A. Installation and operation of telecommunications networks for wholesalers Member tef:TelxiusCablePanamaS.A.Member
3444 Telxius Cable Puerto Rico, Inc. High capacity optical fiber network communications services Member tef:TelxiusCablePuertoRicoInc.Member
3445 Telxius Cable USA, Inc. High bandwidth communications services Member tef:TelxiusCableUSAInc.Member
3446 Telxius Cable Ecuador, S.A. Sale of usage of data transmission capacity via an underwater optical fiber network Member tef:TelxiusCableEcuadorS.A.Member
3447 Telxius Cable Chile, S.A. Involvement in businesses related to public or private telecommunications services Member tef:TelxiusCableChileS.A.Member
3448 Telxius Cable Guatemala, S.A. Installation and operation of telecommunications networks for wholesalers Member tef:TelxiusCableGuatemalaS.A.Member
3449 Telxius Cable Perú, S.A.C. Involvement in the operation and deployment of international telecommunications services via underwater cables and others means Member tef:TelxiusCablePeruS.A.C.Member
3450 Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system Member tef:TelxiusCableColombiaS.A.Member
3451 Telxius Cable Brasil Participaçoes, Ltda. Holding company Member tef:TelxiusCableBrasilParticipacoesLtda.Member
3452 Telxius Cable Brasil, Ltda. Operation and deployment of telecommunications infrastructure Member tef:TelxiusCableBrasilLtda.Member
3453 Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusCableBoliviaSAMember
3454 Telxius Torres Latam, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresLatamMember
3455 Telxius Torres España, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresEspanaMember
3456 Telxius Towers Germany, Gmbh. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTowersGermanyGmbhMember
3457 Telxius Torres Perú S.A.C. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresPeruS.A.C.Member
3458 Telxius Torres Chile Holding, S.A. Holding company Member tef:TelxiusTorresChileHoldingS.A.Member
3459 Telxius Torres Chile, S.A. Operation and deployment of telecommunications infrastructure Member tef:TelxiusTorresChileS.A.Member
3460 Telxius Torres Brasil, Ltda. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresBrasilLtda.Member
3461 Telxius Torres Argentina, S.A. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresArgentinaS.A.Member
3462 Latin American Cellular Holdings Member tef:LatinAmericanCellularHoldingsMember
3463 Telefónica International Wholesale Services II, S.L. International services provider Member tef:TelefonicaInternationalWholesaleServicesMember
3464 Telefónica International Wholesale Services México, S.A. Telecommunications research activities and proyects Member tef:TelefonicaInternationalWholesaleServicesMexicoMember
3465 Telefónica Digital España, S.L. Developer Telco Services Holding Company Member tef:TelefonicaDigitalEspanaMember
3466 Wayra Investigación y Desarrollo S.L. Talent identification and development in ICT. Member tef:WayraInvestigacionyDesarrolloMember
3467 Wayra Chile Tecnología e Innovación Limitada Technological innovation based business project development Member tef:WayraChileTechnologiaeInnovacionLimitadaMember
3468 Wayra Brasil Aceleradora de Projetos Ltda. Technological innovation based business project development Member tef:WayraBrasilAceleradoradeProjetosLtdaMember
3469 WY Telecom, S.A. de C.V. Talent identification and development in ICT Member tef:WYTelecomMember
3470 Wayra Argentina, S.A. Talent identification and development in ICT Member tef:WayraArgentinaMember
3471 Wayra Colombia, S.A.S. Technological innovation based business project development Member tef:WayraColombiaMember
3472 Proyecto Wayra, C.A. Commercial, industrial and mercantile activities Member tef:ProyectoWayraMember
3473 Wayra Perú Aceleradora de Proyectos, S.A.C. Technological innovation based business project development Member tef:WayraPeruAceleradoradeProyectosMember
3474 Wayra UK Ltd. Technological innovation based business project development Member tef:WayraUKMember
3475 Terra Networks Perú, S.A. ISP and portal Member tef:TerraNetworksPeruS.A.Member
3476 Terra Networks Argentina, S.A. ISP and portal Member tef:TerraNetworksArgentinaS.A.Member
3477 Terra Networks México, S.A. de C.V. ISP, portal and real-time financial information services Member tef:TerraNetworksMexicoS.A.deC.V.Member
3478 Telfisa Global, B.V. Integrated cash management, consulting and financial support for Group companies Member tef:TelfisaGlobalMember
3479 Telefónica Global Activities Holding, B.V. Holding Company Member tef:TelefonicaGlobalActivitiesMember
3480 Telefónica Global Services, GmbH Purchasing services Member tef:TelefonicaGlobalServicesMember
3481 Telefónica Global Roaming, GmbH Optimization of network traffic Member tef:TelefonicaGlobalRoamingMember
3482 Group 3G UMTS Holding GmbH Holding Company Member tef:Group3GUMTSHoldingMember
3483 Telefónica Compras Electrónicas, S.L. Development and provision of information Society services Member tef:TelefonicaComprasElectronicasMember
3484 Telefónica de Contenidos, S.A.U. Organization and operation of multimedia service-related business Member tef:TelefonicadeContenidosMember
3485 Telefónica On The Spot Services, S.A.U. Provision of telemarketing services Member tef:TelefonicaOnTheSpotServicesMember
3486 Telefónica Educación Digital, S.L. Vertical e learning portal Member tef:TelefonicaEducacionDigitalMember
3487 Telfin Ireland Ltd. Intragroup financing Member tef:TelfinIrelandMember
3488 Telefónica Ingeniería de Seguridad, S.A.U. Security services and systems Member tef:TelefonicaIngenieriadeSeguridadMember
3489 Telefónica Engenharia de Segurança do Brasil Ltda Security services and systems Member tef:TelefonicaEngenhariadeSegurancadoBrasilLtdaMember
3490 Telefónica Capital, S.A.U. Finance company Member tef:TelefonicaCapitalMember
3491 Lotca Servicios Integrales, S.L. Aircraft ownership and operation Member tef:LotcaServiciosIntegralesMember
3492 Fonditel Pensiones, Entidad Gestora de Fondos de Pensiones, S.A Administration of pension funds Member tef:FonditelPensionesEntidadGestoradeFondosdePensionesMember
3493 Fonditel Gestión, Soc. Gestora de Instituciones de Inversión Colectiva, S.A. Administration and representation of collective investment schemes Member tef:FonditelGestionSoc.GestoradeInstitucionesdeInversionColectivaMember
3494 Telefónica Investigación y Desarrollo, S.A.U. Telecommunications research activities and projects Member tef:TelefonicaInvestigacionyDesarrolloMember
3495 Media Networks Latin America, S.A.C Telecommunications research activities and proyects Member tef:MediaNetworksLatinAmericaMember
3496 Telefónica Luxembourg Holding, S.à.r.L. Holding company Member tef:TelefonicaLuxembourgHoldingMember
3497 Casiopea Reaseguradora, S.A. Reinsurance Member tef:CasiopeaReaseguradoraMember
3498 Nova Casiopea RE S.A. Reinsurance Member tef:NovaCasiopeaREMember
3499 Telefónica Insurance, S.A. Direct insurance transactions Member tef:TelefonicaInsuranceMember
3500 Telefonica Finanzas Member tef:TelefonicaFinanzasMember
3501 Pléyade Peninsular, Correduría de Seguros y Reaseguros del Grupo Telefónica, S.A. Distribution, promotion or preparation of insurance contracts Member tef:PleyadePeninsularCorreduriadeSegurosyRasegurosdelGrupoTelefonicaMember
3502 Fisatel Mexico, S.A. de C.V. Integrated cash mangement, consulting and financial support for Group companies Member tef:FisatelMexicoMember
3503 Telefónica Europe, B.V. Fund raising in capital markets Member tef:TelefonicaEuropeB.V.Member
3504 Telefónica Participaciones, S.A.U. Financial debt instrument issuer Member tef:TelefonicaParticipacionesS.A.U.Member
3505 Telefónica Emisiones, S.A.U. Financial debt instrument issuer Member tef:TelefonicaEmisionesMember
3506 Telefónica Global Technology, S.A.U. Global management and operation of IT systems Member tef:TelefonicaGlobalTechnologyMember
3507 Aliança Atlântica Holding B.V. Holding company Member tef:AliancaAtlanticaHoldingMember
3508 Telefónica Serviços Empresariais do BRASIL, Ltda. Management and administrative services rendered Member tef:TelefonicaServicosEmpresarialsdoBRASILLtdaMember
3509 Telefónica Gestión Logística, S.A.C Logistic service provider Member tef:TelefonicaGestionLogisticaMember
3510 Telefónica Gestión Integral de Edificios y Servicios S.L. Management and administrative services rendered Member tef:TelefonicaGestionIntegraldeEdificiosyServiciosMember
3511 Tempotel, Empresa de Trabajo Temporal, S.A. Temporary employment agency Member tef:TempotelEmpresadeTrabajoTemporalMember
3512 O2 Worldwide Limited Wireless telecommunications activities Member tef:O2WorldwideLimitedMember
3513 Telefónica Innovación Alpha, S.L. Electronic communications and audiovisual services provider Member tef:TelefonicaInnovacionAlphaS.L.Member
3514 Telefónica Servicios Globales, S.L.U. Holding Company Member tef:TelefonicaServiciosGlobalesMember
3515 Telefonica Holding Atticus Member tef:TelefonicaHoldingAtticusMember
3516 Telefónica Chile Holdings, S.L. Holding Company Member tef:TelefonicaChileHoldingsMember
3517 Seguros de Vida y Pensiones Antares, S.A. Life insurance, pensions and health insurance Member tef:SegurosdeVidayPensionesAntaresSAMember
3518 Telefónica Móviles El Salvador, S.A. de C.V. Provision of wireless and international long distance communications services Member tef:TelefonicaMovilesElSalvadorMember
3519 Telefónica Móviles Guatemala, S.A. Wireless, wireline and radio paging communications services provider Member tef:TelefonicaMovilesGuatemalaMember
3520 Telefónica Factoring España, S.A. Factoring services provider Member tef:TelefonicaFactoringEspanaSAMember
3521 Telefónica Factoring Do Brasil, Ltd. Factoring services provider Member tef:TelefonicaFactoringDoBrasilLtdMember
3522 Telefónica Factoring Mexico, S.A. de C.V. SOFOM ENR Factoring services provider Member tef:TelefonicaFactoringMexicoSAdeCVSOFOMENRMember
3523 Telefónica Factoring Perú, S.A.C. Factoring services provider Member tef:TelefonicaFactoringPeruSACMember
3524 Telefónica Factoring Colombia, S.A. Factoring services provider Member tef:TelefonicaFactoringColombiaSAMember
3525 Mobile Financial Services Holding SPRL Financial services Member tef:MobileFinancialServicesHoldingSPRLMember
3526 Telefónica Consumer Finance, Establecimiento Financiero de Crédito, S.A. Specialized credit institution Member tef:TelefonicaConsumerFinanceEstablecimientoFinancierodeCreditoSAMember
3527 Tesco Mobile Ltd. Wireless telephony services Member tef:TescoMobileLtdMember
3528 The Smart Steps Data Technology Company Big data services in China Member tef:SmartStepsDataTechnologyCompanyMember
3529 Unconsolidated structured entities [axis] Axis ifrs-full:UnconsolidatedStructuredEntitiesAxis
3530 Entity's total for unconsolidated structured entities [member] Member ifrs-full:EntitysTotalForUnconsolidatedStructuredEntitiesMember
3531 Telefonica Holding Atticus Member tef:TelefonicaHoldingAtticusMember
3532 Telefonica Internacional Member tef:TelefonicaInternacionalMember
3533 Telefonica Factoring Espana Member tef:TelefonicaFactoringEspanaMember
3534 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
3535 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
3536 Telefonica, S.A. Member tef:TelefonicaS.A.Member
3537 Telefonica Factoring Espana Member tef:TelefonicaFactoringEspanaMember
3538 Telefonica Capital S.A. Member tef:TelefonicaCapitalS.A.Member
3539 O2 Secretaries Ltd Member tef:O2SecretariesLtdMember
3540 Telefonica Europe plc Member tef:TelefonicaEuropeplcMember
3541 O2 Networks Member tef:O2NetworksMember
3542 O2 Cedar Ltd Member tef:O2CedarLtdMember
3543 Telefonica Deutschland Holding A.G. Member tef:TelefonicaDeutschlandHoldingA.G.Member
3544 T Germany Management GmbH Member tef:TGermanyManagementGmbHMember
3545 Telefonica Latinoamerica Holding Member tef:TelefonicaLatinoamericaHoldingMember
3546 Wayra Investigación y Desarrollo S.L. Talent identification and development in ICT. Member tef:WayraInvestigacionyDesarrolloMember
3547 Sao Paulo Telecomunicacoes Participacoes Ltda Member tef:SaoPauloTelecomunicacoesParticipacoesLtdaMember
3548 Telefonica Chile Member tef:TelefonicaChileMember
3549 Telefonica International Holding Member tef:TelefonicaInternationalHoldingMember
3550 Telefónica Móviles Argentina, S.A. Telecommunications service provider Member tef:TelefonicaMovilesArgentinaS.A.Member
3551 Inversiones Telefónica Móviles Holding Limitada Member tef:InversionesTelefonicaMovilesHoldingLimitadaMember
3552 Latin American Cellular Holdings Member tef:LatinAmericanCellularHoldingsMember
3553 Comtel Comunicaciones Telefonica Member tef:ComtelComunicacionesTelefonicaMember
3554 Colombia Telecomunicaciones, S.A, ESP Member tef:ColombiaTelecomunicacionesS.A.ESPMember
3555 Metropolitana de Telecomunicaciones S.A E.S.P Communications services operator Member tef:MetropolitanadeTelecomunicacionesS.A.E.S.P.Member
3556 Empresa de Telecomunicaciones de Bucaramanga S.A. E.S.P Communications services operator Member tef:EmpresadeTelecomunicacionesdeBucaramangaS.A.E.S.P.Member
3557 Telefonica Centroamericana Inversiones Member tef:TelefonicaCentroamericanaInversionesMember
3558 Telefonica Multiservicios Member tef:TelefonicaMultiserviciosMember
3559 Telxius Cable América, S.A. Provision of high bandwidth communications services Member tef:TelxiusCableAmericaS.A.Member
3560 Telxius Cable España, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusCableEspanaMember
3561 Telxius Cable Perú, S.A.C. Involvement in the operation and deployment of international telecommunications services via underwater cables and others means Member tef:TelxiusCablePeruS.A.C.Member
3562 Telxius Cable Chile, S.A. Involvement in businesses related to public or private telecommunications services Member tef:TelxiusCableChileS.A.Member
3563 Telxius Cable Guatemala, S.A. Installation and operation of telecommunications networks for wholesalers Member tef:TelxiusCableGuatemalaS.A.Member
3564 Telxius Cable Argentina, S.A. Operation and deployment of telecommunications infraestructure Member tef:TelxiusCableArgentinaS.A.Member
3565 Telxius Torres Latam, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresLatamMember
3566 Telxius Torres España, S.L.U. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresEspanaMember
3567 Telxius Telecom, S.A. Member tef:TelxiusTelecomMember
3568 Guatemala Cellular Holdings Member tef:GuatemalaCellularHoldingsMember
3569 Telefonica Moviles Argentina Holding Member tef:TelefonicaMovilesArgentinaHoldingMember
3570 Telefonica Finanzas Member tef:TelefonicaFinanzasMember
3571 Telefonica Brasil S.A. Member tef:TelefonicaBrasilS.A.Member
3572 Telefónica Servicios Globales, S.L.U. Holding Company Member tef:TelefonicaServiciosGlobalesMember
3573 Telefonica del Peru Member tef:TelefonicadelPeruMember
3574 Telefonica Factoring Mexico Member tef:TelefonicaFactoringMexicoMember
3575 Telefonica Factoring Peru Member tef:TelefonicaFactoringPeruMember
3576 Telefonica Factoring Colombia Member tef:TelefonicaFactoringColombiaMember
3577 Telefonica Factoring Do Brasil Member tef:TelefonicaFactoringDoBrasilMember
3578 Mobile Financial Services Holding Member tef:MobileFinancialServicesHoldingMember
3579 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
3580 Capital Concept (Monetary) As Of Credit ifrs-full:Equity
3581 %Telefónica Group Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
3582 Investments accounted for by the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
3583 2433403 - Disclosure - Appendix I: Scope of Consolidation - Main Changes in the Scope of Consolidation for the Year (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIScopeOfConsolidationMainChangesInScopeOfConsolidationForYearDetails
3584 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
3585 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3586 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3587 Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusCableBoliviaSAMember
3588 Pontel Participaciones, S.L. Holding company Member tef:PontelParticipacionesSLMember
3589 Centro de Asistencia Telefónica, S.A. Provision of services related to databases Member tef:CentrodeAsistenciaTelefonicaS.A.Member
3590 Shortcut I GmbH & Co. KG Technological innovation based business project development Member tef:ShortcutIGmbHCo.KGMember
3591 Telefónica Digital Inc. IP telephony platform Member tef:TelefonicaDigitalMember
3592 Tokbox Inc. IP telephony platform Member tef:TokboxIncMember
3593 Axonix Ltd Digital and mobile advertising Member tef:AxonixLtdMember
3594 Telefónica Gestión de Servicios Compartidos México, S.A. de C.V. Management and administrative services rendered Member tef:TelefonicaGestiondeServiciosCompartidosMexicoSAdeCVMember
3595 Telxius Torres Argentina, S.A. Establishment and operation of any kind of communications infrastructure and/or network Member tef:TelxiusTorresArgentinaS.A.Member
3596 Minodes GmbH Technological and consulting services in Big Data provider Member tef:MinodesGmbHMember
3597 Co-Trade GmbH Technological services Member tef:CotradeGmbHMember
3598 Empresa de Telecomunicaciones de Bucaramanga S.A. E.S.P Communications services operator Member tef:EmpresadeTelecomunicacionesdeBucaramangaS.A.E.S.P.Member
3599 Metropolitana de Telecomunicaciones S.A E.S.P Communications services operator Member tef:MetropolitanadeTelecomunicacionesS.A.E.S.P.Member
3600 Operaciones Tecnológicas y Comerciales S.A.S Communications services operator Member tef:OperacionesTecnologicasyComercialesS.A.S.Member
3601 Compañía Señales del Norte, S.A. de C.V Other business support services Member tef:CompaniaSenalesdelNorteMember
3602 Telefónica Gestión de Servicios Compartidos Perú, S.A.C. Management and administrative services rendered Member tef:TelefonicaGestiondeServiciosCompartidosdePeruMember
3603 Saluspot Spain, S.L. Medical services and articles through internet provider Member tef:SaluspotSpainMember
3604 Telefónica Deutschland Holding A.G Exchange of shares with KPN Member tef:TelefonicaGermanyHoldingsMember
3605 Telxius Telecom, S.A. Telecommunications service provider Member tef:TelxiusTelecomMember
3606 Telecomunicaciones Personalizadas, S.L.U Telecommunications service provider Member tef:TelecomunicacionesPersonalizadasSLUMember
3607 Televisión Federal S.A.- TELEFE Provision and operation TV and radio broadcasting-services Member tef:TelevisionFederalS.A.Member
3608 Atlántida Comunicaciones, S.A. Participation in public media Member tef:AtlantidaComunicacionesMember
3609 Telefónica Media Argentina, S.A. Participation in public media Member tef:TelefonicaMediaArgentinaMember
3610 Vocem 2013 Teleservicios, S.A. Call center services Member tef:Vocem2013TeleserviciosMember
3611 Telefónica Gestión de Servicios Compartidos Argentina, S.A. Management and administrative services rendered Member tef:TelefonicaGestiondeServiciosCompartidosArgentinaMember
3612 Telefónica Gestión de Servicios Compartidos España, S.A. Management and administrative services rendered Member tef:TelefonicaGestiondeServiciosCompartidosEspanaMember
3613 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
3614 % Acquisition Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
3615 % sold Concept (Percent) As Of tef:PercentageofShareCapitalSold
3616 % Participation Concept (Percent) As Of tef:ProportionOfLiquidationParticipation
3617 % Participation after operation Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
3618 %Telefónica Group Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
3619 2434402 - Disclosure - Appendix II: Board and Senior Management Compensation - Compensation Allocation of Board and Senior Management (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiBoardAndSeniorManagementCompensationCompensationAllocationOfBoardAndSeniorManagementDetails
3620 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3621 Committee Name [Axis] Axis tef:CommitteeNameAxis
3622 Committee Name [Domain] Member tef:CommitteeNameDomain
3623 Audit and Control Member tef:AuditandControlMember
3624 Nominating, Compensation and Corporate Governance Member tef:NominatingCompensationandCorporateGovernanceMember
3625 Service Quality and Customer Service Member tef:ServiceQualityandCustomerServiceMember
3626 Strategy and Innovation Member tef:StrategyandInnovationMember
3627 Regulation and Institutional Affairs Member tef:RegulationandInstitutionalAffairsMember
3628 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3629 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3630 Directors Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
3631 Advisory or Control Committees Member tef:AdvisoryOrControlCommitteesMember
3632 Other Companies Member ifrs-full:OtherRelatedPartiesMember
3633 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3634 Counterparties [member] Member ifrs-full:CounterpartiesMember
3635 Mr. José María Álvarez-Pallete López Member tef:JoseMariaAlvarezPalleteLopezMember
3636 Mr. Isidro Fainé Casas Member tef:IsidroFaineCasasMember
3637 Mr. José María Abril Pérez Member tef:JoseMariaAbrilPerezMember
3638 Mr. Ángel Vilá Boix Member tef:AngelVilaBoixMember
3639 Mr. Juan Ignacio Cirac Sasturain Member tef:JuanIgnacioCiracSasturainMember
3640 Mr. José Javier Echenique Landiríbar Member tef:JoseJavierEcheniqueLandiribarMember
3641 Mr. Peter Erskine Member tef:PeterErskineMember
3642 Ms. Sabina Fluxà Thienemann Member tef:SabinaFluxaThienemannMember
3643 Mr. Luiz Fernando Furlán Member tef:LuizFernandoFurlanMember
3644 Ms. Carmen García de Andrés Member tef:CarmenGarciadeAndresMember
3645 Ms. María Luisa García Blanco7 Member tef:MariaLuisaGarciaBlancoMember
3646 Mr. Jordi Gual Solé7 Member tef:JordiGualSoleMember
3647 Mr. Peter Löscher Member tef:PeterLoscherMember
3648 Mr. Ignacio Moreno Martínez Member tef:IgnacioMorenoMartinezMember
3649 Mr. Francisco Javier de Paz Mancho Member tef:FranciscoJavierdePazMember
3650 Mr. Francisco José Riberas Mera Member tef:FranciscoJoseRiberasMember
3651 Mr. Wang Xiaochu Member tef:WangXiaochuMember
3652 Ms. Eva Castillo Sanz Member tef:EvaCastilloSanzMember
3653 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3654 Salary Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationSalary
3655 Fixed Compensation Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationFixedCompensation
3656 Attendance fees Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationAttendanceFees
3657 Short-term variable compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
3658 Compensation for belonging to Committees of the Board Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationCompensationforMembershipToCommitteesOfTheBoard
3659 Other items Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationOtherLongtermBenefits
3660 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
3661 Accrued fixed compensation Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationAccruedFixedCompensation
3662 2434403 - Disclosure - Appendix II: Board and Senior Management Compensation - Long-Term Savings Systems (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiBoardAndSeniorManagementCompensationLongTermSavingsSystemsDetails
3663 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3664 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3665 Counterparties [member] Member ifrs-full:CounterpartiesMember
3666 Mr. José María Álvarez-Pallete López Member tef:JoseMariaAlvarezPalleteLopezMember
3667 Mr. Ángel Vilá Boix Member tef:AngelVilaBoixMember
3668 Retirement Plan Type1 [Axis] Axis tef:RetirementPlanType1Axis
3669 Retirement Plan Type1 [Domain] Member tef:RetirementPlanType1Domain
3670 Pension plans Member tef:PensionPlansMember
3671 Benefits plan Member tef:DomesticDefinedBenefitPlanMember
3672 Unit link-type Insurance/Pension Plan Surplus Member tef:UnitLinktypeInsurancePensionPlanSurplusMember
3673 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3674 Contributions Concept (Monetary) For Period ifrs-full:ParticipationInDefinedBenefitPlanThatSharesRisksBetweenGroupEntitiesRelatedPartyTransactions
3675 2434404 - Disclosure - Appendix II: Board and Senior Management Compensation - Life Insurance Premiums (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiBoardAndSeniorManagementCompensationLifeInsurancePremiumsDetails
3676 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3677 Types of insurance contracts [axis] Axis ifrs-full:TypesOfInsuranceContractsAxis
3678 Types of insurance contracts [member] Member ifrs-full:InsuranceContractsMember
3679 Life insurance premiums Member ifrs-full:LifeInsuranceContractsMember
3680 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3681 Counterparties [member] Member ifrs-full:CounterpartiesMember
3682 Mr. José María Álvarez-Pallete López Member tef:JoseMariaAlvarezPalleteLopezMember
3683 Mr. Ángel Vilá Boix Member tef:AngelVilaBoixMember
3684 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3685 Life insurance premiums Concept (Monetary) For Period Debit ifrs-full:ExpenseArisingFromInsuranceContracts
3686 2434405 - Disclosure - Appendix II: Board and Senior Management Compensation - PSP (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiBoardAndSeniorManagementCompensationPspDetails
3687 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
3688 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3689 Counterparties [member] Member ifrs-full:CounterpartiesMember
3690 Mr. José María Álvarez-Pallete López Member tef:JoseMariaAlvarezPalleteLopezMember
3691 Mr. Ángel Vilá Boix Member tef:AngelVilaBoixMember
3692 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
3693 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
3694 PSP - First Cycle / 2018-2020 Member tef:PSPFirstCycle20182020Member
3695 PSP - Second Cycle / 2019-2021 Member tef:PSPSecondCycle20192021Member
3696 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
3697 Theoretical shares allocated (without co-investment) Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsGrantedInSharebasedPaymentArrangement
3698 2434406 - Disclosure - Appendix II: Board and Senior Management Compensation - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiBoardAndSeniorManagementCompensationNarrativeDetails
3699 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
3700 Retirement Plan Type1 [Axis] Axis tef:RetirementPlanType1Axis
3701 Retirement Plan Type1 [Domain] Member tef:RetirementPlanType1Domain
3702 Benefits plan Member tef:DomesticDefinedBenefitPlanMember
3703 Pension plans Member tef:PensionPlansMember
3704 Unit link-type Insurance/Pension Plan Surplus Member tef:UnitLinktypeInsurancePensionPlanSurplusMember
3705 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3706 Counterparties [member] Member ifrs-full:CounterpartiesMember
3707 Mr. Antonio Massanell Lavilla Member tef:SantiagoFernandezValbuenaMember
3708 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3709 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3710 Directors Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
3711 Senior Management (Excluding Board Directors) Member tef:SeniorManagementExcludingBoardDirectorsMember
3712 Range [axis] Axis ifrs-full:RangeAxis
3713 Ranges [member] Member ifrs-full:RangesMember
3714 Maximum Member ifrs-full:TopOfRangeMember
3715 Minimum Member ifrs-full:BottomOfRangeMember
3716 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
3717 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
3718 Second PIP Member tef:SecondPIPMember
3719 Second PIP - First Cycle 2014-2017 Member tef:SecondPIPFirstCycle20142017Member
3720 Second PIP - Second Cycle 2015-2018 Member tef:SecondPIPSecondCycle20152018Member
3721 PSP - First Cycle / 2018-2020 Member tef:PSPFirstCycle20182020Member
3722 PSP - Second Cycle / 2019-2021 Member tef:PSPSecondCycle20192021Member
3723 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
3724 Award vesting period Concept (xbrli:durationItemType) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod1
3725 Delivery percent (if within median of performance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentagePerformanceWithinMeanofPerformance
3726 Delivery percent (if within third quartile of performance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentagePerformanceWithinThirdQuartileofPerformance
3727 Delivery percent (if within ninth docile or higher of performance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentagePerformanceWithinNinthDocileofPerformance
3728 Employee contributions Concept (Monetary) For Period Debit tef:EmployeeStockOwnershipPlanESOPEmployeeContributionsAmount
3729 Monthly employee contributions Concept (Monetary) For Period Debit tef:EmployeeStockOwnershipPlanESOPMonthlyEmployeeContributionsAmount
3730 Cumulative shares issued (shares) Concept (Shares) As Of tef:CumulativeStockIssuedSharesEmployeeStockOwnershipPlan
3731 Delivery percent (fulfillment of TSR objective) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofFulfillmentofTotalShareholderReturnObjective
3732 Delivery percent (free cash flow generation, maximum compliance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofFreeCashFlowGeneration
3733 Shares delivered subject to retention period of one year (as a percent) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofSharesDeliveredSubjecttoRetentionPeriod
3734 Accrued fixed compensation Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationAccruedFixedCompensation
3735 Delivery percent (free cash flow generation, minimum compliance) Concept (Percent) For Period tef:SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofFreeCashFlowGenerationMinimumCompliance
3736 Compensation total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
3737 Contributions Concept (Monetary) For Period ifrs-full:ParticipationInDefinedBenefitPlanThatSharesRisksBetweenGroupEntitiesRelatedPartyTransactions
3738 In-kind compensation Concept (Monetary) For Period Debit tef:KeyManagementPersonnelCompensationInkindCompensation
3739 Theoretical shares allocated (without co-investment) (in shares) Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsGrantedInSharebasedPaymentArrangement
3740 Maximum number of shares (shares) Concept (Shares) As Of tef:SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorized1
3741 2435402 - Disclosure - Appendix III: Debentures and Bonds - Maturity (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiiDebenturesAndBondsMaturityDetails
3742 Disclosure of maturity analysis for non-derivative financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
3743 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
3744 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
3745 Spain Member country:ES
3746 Outside of Parent Country Member tef:OutsideofParentCountryMember
3747 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3748 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3749 Telefónica Europe, B.V. Member tef:TelefonicaEuropeB.V.Member
3750 Telefónica Emisiones, S.A.U. Member tef:TelefonicaEmisionesS.A.U.Member
3751 Telefónica Participaciones Member tef:TelefonicaParticipacionesMember
3752 Telefónica Chile, S.A. Member tef:TelefonicaChileS.A.Member
3753 Telefónica Móviles Chile, S.A. Member tef:TelefonicaMovilesChileS.A.Member
3754 Telefónica Finanzas México, S.A. Member tef:TelefonicaFinanzasMexicoS.A.Member
3755 Telefónica del Perú, S.A. Member tef:TelefonicadelPeruS.A.Member
3756 Telefônica Brasil, S.A. Member tef:TelefonicaBrasilS.A.Member
3757 Colombia Telecomunicaciones, S.A, ESP Member tef:ColombiaTelecomunicacionesS.A.ESPMember
3758 O2 Telefónica Deutschland Finanzierungs, GmbH Member tef:O2TelefonicaDeutschlandFinanzierungsGmbHMember
3759 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
3760 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
3761 Fixed interest rate Member ifrs-full:FixedInterestRateMember
3762 Floating interest rate Member ifrs-full:FloatingInterestRateMember
3763 Maturity [axis] Axis ifrs-full:MaturityAxis
3764 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3765 2019 Member ifrs-full:NotLaterThanOneYearMember
3766 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
3767 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
3768 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
3769 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
3770 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
3771 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
3772 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
3773 T. EUROPE BV SEP_00 BOND GLOBAL D Member tef:T.EUROPEBVSEP_00BONDGLOBALDMember
3774 TEBV FEB_03 EMTN FIXED TRANCHE B Member tef:TEBVFEB_03EMTNFIXEDTRANCHEBMember
3775 EMTN O2 GBP Member tef:EMTNO2GBPMember
3776 TELEF EMISIONES JUNE 06 TRANCHE D Member tef:TELEFEMISIONESJUNE06TRANCHEDMember
3777 TELEF EMISIONES JANUARY 07 A Member tef:TELEFEMISIONESJANUARY07AMember
3778 TELEF EMISIONES MAY 2014 Member tef:TELEFEMISIONESMAY2014Member
3779 TELEF EMISIONES JULY 15, 2019 Member tef:TELEFEMISIONESJULY152019Member
3780 TELEF EMISIONES NOVEMBER 11, 2019 Member tef:TELEFEMISIONESNOVEMBER112019Member
3781 EMTN GBP 12/09/2022 650 GBP Member tef:EMTNGBP12092022650GBPMember
3782 TELE EMISIONES APRIL 2010 Member tef:TELEEMISIONESAPRIL32010Member
3783 EMTN GBP 10/08/2029 400 GBP Member tef:EMTNGBP10082029400GBPMember
3784 TELEF EMISIONES FEBRUARY 2011 Member tef:TELEFEMISIONESFEBRUARY20111Member
3785 TELEF. EMISIONES FEBRUARY 2012 Member tef:TELEF.EMISIONESFEBRUARY20121Member
3786 TELEF. EMISIONES OCTOBER 2012 Member tef:TELEF.EMISIONESOCTOBER2012Member
3787 TELEF. EMISIONES DECEMBER 2012 Member tef:TELEF.EMISIONESDECEMBER20121Member
3788 TELEF EMISIONES JANUARY 2013 Member tef:TELEFEMISIONESJANUARY2013Member
3789 TELEF. EMISIONES MARCH 2013 Member tef:TELEF.EMISIONESMARCH2013Member
3790 TELEF EMISIONES APRIL 2013 Member tef:TELEFEMISIONESAPRIL2013Member
3791 TELEF. EMISIONES MAY 2013 Member tef:TELEF.EMISIONESMAY2013Member
3792 TELEF. EMISIONES OCTOBER 2013 Member tef:TELEF.EMISIONESOCTOBER2013Member
3793 TELEF. EMISIONES OCTOBER 2014 Member tef:TELEF.EMISIONESOCTOBER2014Member
3794 TELEF EMISIONES JULY 2015 Member tef:TELEFEMISIONESJULY2015Member
3795 TELEF. EMISIONES SEPTEMBER 2015 Member tef:TELEF.EMISIONESSEPTEMBER2015Member
3796 TELEF EMISIONES APRIL 2016 Member tef:TELEFEMISIONESAPRIL2016Member
3797 TELEF EMISIONES APRIL 2016 Member tef:TELEFEMISIONESAPRIL20161Member
3798 TELEF. EMISIONES OCTOBER 2016 Member tef:TELEF.EMISIONESOCT2016Member
3799 TELEF. EMISIONES OCTOBER 2016 Member tef:TELEF.EMISIONESOCT20161Member
3800 TELEF. EMISIONES DECEMBER 2016 Member tef:TELEF.EMISIONESDEC2016Member
3801 TELEF. EMISIONES JANUARY 2017 Member tef:TELEF.EMISIONESJANUARY20171Member
3802 TELEF. EMISIONES JANUARY 2017 Member tef:TELEF.EMISIONESJANUARY20172Member
3803 TELEF. EMISIONES JANUARY 2017 Member tef:TELEF.EMISIONESJANUARY20173Member
3804 TELEF. EMISIONES MARCH 2017 Member tef:TELEF.EMISIONESMARCH20171Member
3805 TELEF. EMISIONES MARCH 2017 Member tef:TELEF.EMISIONESMARCH20172Member
3806 TELEF. EMISIONES MARCH 2017 Member tef:TELEF.EMISIONESMARCH20173Member
3807 TELEF. EMISIONES APRIL 2017 Member tef:TELEF.EMISIONESAPRIL20171Member
3808 TELEF. EMISIONES APRIL 2017 Member tef:TELEF.EMISIONESAPRIL20172Member
3809 TELEF. EMISIONES SEPTEMBER 2017 Member tef:TELEF.EMISIONESSEPTEMBER2017Member
3810 TELEF. EMISIONES JANUARY 2018 Member tef:TELEF.EMISIONESJANUARY2018Member
3811 TELEF. EMISIONES MARCH 2018 Member tef:TELEF.EMISIONESMARCH2018Member
3812 TELEF. EMISIONES MARCH 2018 Member tef:TELEF.EMISIONESMARCH20181Member
3813 TELEF. EMISIONES SEPTEMBER 2018 Member tef:TELEF.EMISIONESSEPTEMBER2018Member
3814 Exchangeable Bond MARCH 2016 Member tef:ExchangeableBondMARCH2016Member
3815 Bond Q Member tef:BondQMember
3816 Bond T Member tef:BondTMember
3817 144A Bond Member tef:USDBondMember
3818 Bond F Member tef:BondFMember
3819 Bond G Member tef:BondGMember
3820 Bond I Member tef:BondIMember
3821 Bond K Member tef:BondKMember
3822 T. Finanzas Mex 0710 FIX Member tef:T.FinanzasMex0710FIXMember
3823 Bond T. Peru 4th Program (19th Serie A) Member tef:BondT.Peru4thProgram19thSeriesAMember
3824 Bond T. Peru 4th Program (12th Serie A) Member tef:BondT.Peru4thProgram12thSeriesAMember
3825 Bond T. Peru 4th Program (19th Serie B) Member tef:BondT.Peru4thProgram19thSeriesBMember
3826 Bond T. Peru 4th Program (37th Serie A) Member tef:BondT.Peru4thProgram37thSeriesAMember
3827 Bond T. Peru 4th Program (19th Serie C) Member tef:BondT.Peru4thProgram19thSeriesCMember
3828 Bond T. Peru 5th Program (22nd Serie Ab) Member tef:BondT.Peru5thProgram22ndSeriesAbMember
3829 Bond T. Peru 5th Program (22nd Serie Ac) Member tef:BondT.Peru5thProgram22ndSeriesAcMember
3830 Bond T. Peru 6th Program (17th Serie A) Member tef:BondT.Peru6thProgram17thSeriesAMember
3831 Bond T. Peru 7th Program (27th Serie A) Member tef:BondT.Peru7thProgram27thSeriesAMember
3832 Bond T. Peru 6th Program (11th Serie A) Member tef:BondT.Peru6thProgram11thSerieAMember
3833 Bond T. Peru 6th Program (11th Serie B) Member tef:BondT.Peru6thProgram11thSerieBMember
3834 Bond T. Peru 6th Program (12th Serie A) Member tef:BondT.Peru6thProgram12thSerieAMember
3835 Bond T. Peru 6th Program (13th Serie A) Member tef:BondT.Peru6thProgram13thSerieAMember
3836 Bond T. Peru 6th Program (14th Serie A) Member tef:BondT.Peru6thProgram14thSerieAMember
3837 Bond T. Peru 6th Program (15th Serie A) Member tef:BondT.Peru6thProgram15thSerieAMember
3838 Bond T. Peru 6th Program (16th Serie A) Member tef:BondT.Peru6thProgram16thSeriesAMember
3839 Bond T. Peru 6th Program (12th Serie B) Member tef:BondT.Peru6thProgram12thSeriesBMember
3840 Bond T. Peru 1st Private Program (1st Serie A) Member tef:BondT.Peru1stPrivateProgram1stSeriesAMember
3841 Nonconvertible bonds Member tef:Nonconvertiblebonds1Member
3842 Nonconvertible bonds Member tef:Nonconvertiblebonds3Member
3843 Nonconvertible bonds Member tef:Nonconvertiblebonds2Member
3844 Nonconvertible bonds ( Telemig) I Member tef:ConvertiblebondsTelemigIMember
3845 Nonconvertible bonds ( Telemig) II Member tef:ConvertiblebondsTelemigIIMember
3846 Nonconvertible bonds ( Telemig) III Member tef:ConvertiblebondsTelemigIIIMember
3847 BOND R144-A Member tef:BONDR144AMember
3848 Bond Member tef:BondMember
3849 Bond Member tef:Bond1Member
3850 Disclosure of maturity analysis for non-derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
3851 Interest rate (as a percent) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
3852 Debentures and bonds Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
3853 2435403 - Disclosure - Appendix III: Debentures and Bonds - Debentures and Bonds Issued (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIiiDebenturesAndBondsDebenturesAndBondsIssuedDetails
3854 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
3855 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
3856 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
3857 Spain Member country:ES
3858 Germany Member country:DE
3859 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
3860 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
3861 Telefónica Emisiones, S.A.U. Member tef:TelefonicaEmisionesS.A.U.Member
3862 O2 Telefónica Deutschland Finanzierungs GmbH Member tef:O2TelefonicaDeutschlandMember
3863 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
3864 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
3865 EMTN BOND Member tef:EMTNBond1Member
3866 SHELF BOND Member tef:SHELFBond1Member
3867 SHELF BOND Member tef:SHELFBond2Member
3868 EMTN BOND Member tef:EMTNBond2Member
3869 BOND Member tef:BondMember
3870 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
3871 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
3872 Fixed interest rate Member ifrs-full:FixedInterestRateMember
3873 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
3874 Debentures and bonds Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
3875 Interest rate (as a percent) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
3876 2436402 - Disclosure - Appendix IV: Financial Instruments - Summary (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIvFinancialInstrumentsSummaryDetails
3877 Disclosure of maturity analysis for derivative financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable
3878 Maturity [axis] Axis ifrs-full:MaturityAxis
3879 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3880 2019 Member ifrs-full:NotLaterThanOneYearMember
3881 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
3882 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
3883 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
3884 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
3885 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
3886 Measurement [axis] Axis ifrs-full:MeasurementAxis
3887 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
3888 Fair value Member ifrs-full:AtFairValueMember
3889 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
3890 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
3891 Underlying debt Member ifrs-full:DebtSecuritiesMember
3892 Derivative instruments Member ifrs-full:DerivativesMember
3893 Option contract Member ifrs-full:OptionContractMember
3894 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
3895 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
3896 Floating rate Member ifrs-full:FloatingInterestRateMember
3897 Fixed rate Member ifrs-full:FixedInterestRateMember
3898 Rate cap Member tef:RateCapMember
3899 Currency Type [Axis] Axis tef:Currency1Axis
3900 All Currencies [Domain] Member currency:AllCurrenciesDomain
3901 EUR Member currency:EUR
3902 CZK Member currency:CZK
3903 GBP Member currency:GBP
3904 CHF Member currency:CHF
3905 USD Member currency:USD
3906 UYU Member currency:UYU
3907 ARS Member currency:ARS
3908 BRL Member currency:BRL
3909 CLP Member currency:CLP
3910 UFC Member currency:CLF
3911 PEN Member currency:PEN
3912 VAC Member tef:ValorAdquisitivoConstantedePeruMember
3913 COP Member currency:COP
3914 VEB Member currency:VEF
3915 MXN Member currency:MXN
3916 GTQ Member currency:GTQ
3917 NIO Member currency:NIO
3918 JPY Member currency:JPY
3919 Disclosure of maturity analysis for derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems
3920 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
3921 Underlying debt, at fair value Concept (Monetary) As Of Credit tef:FinancialInstrumentsNotDesignatedasHedgingInstrumentsFairValue
3922 Associated derivatives, at fair value Concept (Monetary) As Of ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
3923 Financial instruments, at fair value Concept (Monetary) As Of Credit tef:FinancialInstrumentsFairValue
3924 Spread (as a percent) Concept (Percent) As Of tef:SensitivityAnalysisBasisSpreadOnVariableRate
3925 Interest rate (as a percent) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
3926 2436403 - Disclosure - Appendix IV: Financial Instruments - Interest Rate Swaps (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIvFinancialInstrumentsInterestRateSwapsDetails
3927 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
3928 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
3929 Assets [member] Member ifrs-full:ClassesOfAssetsMember
3930 Non trading purposes Member ifrs-full:TradingEquitySecuritiesMember
3931 Derivative instruments Member ifrs-full:DerivativesMember
3932 Leg of Derivative Contract [Axis] Axis tef:LegofDerivativeContractAxis
3933 Leg of Derivative Contract [Domain] Member tef:LegofDerivativeContractDomain
3934 Receiving leg Member tef:ReceivingLegMember
3935 Paying leg Member tef:PayingLegMember
3936 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
3937 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
3938 Fixed to fix Member tef:FixedtoFixedInterestRateMember
3939 Fixed to floating Member tef:FixedtoFloatingInterestRateMember
3940 Floating to fixed Member tef:FloatingtoFixedInterestRateMember
3941 Floating to floating Member tef:FloatingtoFloatingInterestRateMember
3942 Measurement [axis] Axis ifrs-full:MeasurementAxis
3943 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
3944 Fair value Member ifrs-full:AtFairValueMember
3945 Maturity [axis] Axis ifrs-full:MaturityAxis
3946 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3947 2019 Member ifrs-full:NotLaterThanOneYearMember
3948 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
3949 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
3950 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
3951 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
3952 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
3953 Currency Type [Axis] Axis tef:Currency1Axis
3954 All Currencies [Domain] Member currency:AllCurrenciesDomain
3955 EUR Member currency:EUR
3956 USD Member currency:USD
3957 GBP Member currency:GBP
3958 MXN Member currency:MXN
3959 CLP Member currency:CLP
3960 CHF Member currency:CHF
3961 BRL Member currency:BRL
3962 COP Member currency:COP
3963 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
3964 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
3965 Interest rate swaps Member ifrs-full:InterestRateSwapContractMember
3966 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
3967 Derivative financial assets held for trading Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssetsHeldForTrading
3968 Average interest rate (as a percent) Concept (Percent) As Of ifrs-full:AverageRateOfHedgingInstrument
3969 Average spread (as a percent) Concept (Percent) As Of tef:SensitivityAnalysisAverageBasisSpreadOnVariableRate
3970 Derivative financial assets held for hedging Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssetsHeldForHedging
3971 2436404 - Disclosure - Appendix IV: Financial Instruments - Foreign Exchange and Interest Rate Options (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIvFinancialInstrumentsForeignExchangeAndInterestRateOptionsDetails
3972 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
3973 Range [axis] Axis ifrs-full:RangeAxis
3974 Ranges [member] Member ifrs-full:RangesMember
3975 Maximum Member ifrs-full:TopOfRangeMember
3976 Minimum Member ifrs-full:BottomOfRangeMember
3977 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
3978 Hedging instruments Member ifrs-full:HedgingInstrumentsMember
3979 Bought Member tef:HedgingInstrumentsBoughtMember
3980 Sold Member tef:HedgingInstrumentsSoldMember
3981 Maturity [axis] Axis ifrs-full:MaturityAxis
3982 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
3983 2019 Member ifrs-full:NotLaterThanOneYearMember
3984 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
3985 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
3986 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
3987 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
3988 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
3989 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
3990 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
3991 Collars Member tef:CollarMember
3992 Caps Member tef:CapMember
3993 Floors Member tef:FloorMember
3994 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
3995 Derivative financial assets held for hedging Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssetsHeldForHedging
3996 Strike price of derivative instrument Concept (Monetary) As Of Debit tef:StrikePriceofDerivativeInstrument
3997 2436405 - Disclosure - Appendix IV: Financial Instruments - Derivative Financial Instruments Receivable / Payable (Details) Network

*

*

 http://www.telefonica.com/role/AppendixIvFinancialInstrumentsDerivativeFinancialInstrumentsReceivablePayableDetails
3998 Disclosure of maturity analysis for derivative financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable
3999 Currency Type [Axis] Axis tef:Currency1Axis
4000 All Currencies [Domain] Member currency:AllCurrenciesDomain
4001 ARS Member currency:ARS
4002 BRL Member currency:BRL
4003 CLP Member currency:CLP
4004 COP Member currency:COP
4005 CZK Member currency:CZK
4006 EUR Member currency:EUR
4007 GBP Member currency:GBP
4008 JPY Member currency:JPY
4009 MXN Member currency:MXN
4010 PEN Member currency:PEN
4011 UFC Member currency:CLF
4012 USD Member currency:USD
4013 UDI Member currency:MXV
4014 CHF Member currency:CHF
4015 UYU Member currency:UYU
4016 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
4017 Hedging instruments Member ifrs-full:HedgingInstrumentsMember
4018 Receive Member tef:HedgingInstrumentstoReceiveMember
4019 Pay Member tef:HedgingInstrumentstoPayMember
4020 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
4021 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
4022 Currency swaps Member ifrs-full:CurrencySwapContractMember
4023 Forwards Member ifrs-full:ForwardContractMember
4024 Maturity [axis] Axis ifrs-full:MaturityAxis
4025 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
4026 2019 Member ifrs-full:NotLaterThanOneYearMember
4027 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
4028 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
4029 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
4030 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
4031 Subsequent years Member ifrs-full:LaterThanFiveYearsMember
4032 Disclosure of maturity analysis for derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems
4033 Derivative financial assets held for hedging Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssetsHeldForHedging
4034 2437402 - Disclosure - Appendix V: Interest-Bearing Debt (Details) Network

*

*

 http://www.telefonica.com/role/AppendixVInterestBearingDebtDetails
4035 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
4036 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
4037 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
4038 Telefónica, S.A Member tef:TelefonicaS.A.Member
4039 Telefónica Europe, B.V. Member tef:TelefonicaEuropeB.V.Member
4040 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
4041 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
4042 Telefónica Germany GmbH & Co. OHG Member tef:TelefonicaGermanyGmbHCoOHGMember
4043 Telxius Telecom, S.A. Member tef:TelxiusTelecomSAMember
4044 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
4045 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
4046 Structured financing due July 30, 2021 Member tef:StructuredFinancingDueJuly302021Member
4047 Structured financing due January 31, 2023 Member tef:StructuredFinancingDueJanuary312023Member
4048 Structured financing due October 31, 2023 Member tef:StructuredFinancingDueOctober312023Member
4049 Bilateral loan due June 26, 2019 Member tef:BilateralLoanDueJune262019Member
4050 Structured financing due March 11, 2026 Member tef:StructuredFinancingDueMarch112026Member
4051 Structured euro financing due March 11, 2026 Member tef:StructuredEuroFinancingDueMarch112026Member
4052 Bilateral loan due February 23, 2021 Member tef:BilateralLoanDueFebruary232021Member
4053 Bilateral Loan due September 28, 2018 Member tef:BilateralLoanDueSeptember282018Member
4054 Bilateral loan due March 19, 2019 Member tef:BilateralLoanDueMarch192019Member
4055 Credit facility due December 27, 2020 Member tef:CreditFacilityDueDecember272020Member
4056 Credit facility due March 14, 2020 Member tef:CreditFacilityDueMarch142020Member
4057 Bilateral Loan due January 30, 2026 Member tef:BilateralLoanDueJanuary302026Member
4058 Bilateral Loan due October 22, 2020 Member tef:BilateralLoanDueOctober222020Member
4059 Bilateral Loan due July 22, 2019 Member tef:BilateralLoanDueJuly222019Member
4060 Credit Facility due March 01, 2020 Member tef:CreditFacilityDueMarch012020Member
4061 Syndicated Facility due June 13, 2025 Member tef:SyndicatedFacilityDueJune132025Member
4062 Structured financing due November 28, 2024 Member tef:StructuredFinancingDueNovember282024Member
4063 Syndicated Facility due December 01, 2023 Member tef:SyndicatedFacilitydueDecember012023Member
4064 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
4065 Contractual limit amount Concept (Monetary) As Of ifrs-full:NotionalAmount
4066 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
4067 Early repayment of debt Concept (Monetary) As Of Debit tef:EarlyRepaymentofDebt
4068 Maturity extension period on borrowings Concept (xbrli:durationItemType) For Period tef:BorrowingsMaturityExtension
4069 2467402 - Disclosure - Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group - Narrative (Details) Network

*

*

 http://www.telefonica.com/role/AppendixViKeyRegulatoryIssuesAndConcessionsAndLicensesHeldByTelefonicaGroupNarrativeDetails
4070 Disclosure of detailed information about service concession arrangements [table] Table

*

*

 ifrs-full:DisclosureOfServiceConcessionArrangementsTable
4071 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
4072 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
4073 Colombia Telecomunicaciones, S.A., ESP Member tef:ColombiaTelecomunicacionesMember
4074 Telefónica Móviles España Member tef:TelefonicaMovilesEspanaMember
4075 Range [axis] Axis ifrs-full:RangeAxis
4076 Ranges [member] Member ifrs-full:RangesMember
4077 Minimum Member ifrs-full:BottomOfRangeMember
4078 Maximum Member ifrs-full:TopOfRangeMember
4079 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
4080 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
4081 United Kingdom Member country:GB
4082 Brazil Member country:BR
4083 Region One Member tef:RegionOneMember
4084 Region Two Member tef:RegionTwoMember
4085 Region Three Member tef:RegionThreeMember
4086 Scenario [Axis] Axis tef:ScenarioAxis
4087 Scenario [Domain] Member tef:ScenarioDomain
4088 Forecast Member tef:ScenarioForecast1Member
4089 Disclosure of detailed information about service concession arrangements [line items] LineItems ifrs-full:DisclosureOfServiceConcessionArrangementsLineItems
4090 Extra charges for calls on roaming services per minute Concept (Monetary) For Period Debit tef:RegulatoryOperationsExtraChargesForCallsonRoamingServicesPerMinute
4091 Extra charges for calls on roaming services per SMS Concept (Monetary) For Period Debit tef:RegulatoryOperationsExtraChargesForCallsonRoamingServicesPerSMS
4092 Extra charges for calls on roaming services per megabyte Concept (Monetary) For Period Debit tef:RegulatoryOperationsExtraChargesForCallsonRoamingServicesPerMegabyte
4093 Sum of domestic retail price and surcharge on roaming services, per minute Concept (Monetary) For Period Debit tef:RegulatoryOperationsSumofDomesticRetailPriceAndSurchargeOnRoamingServicesPerMinute
4094 Sum of domestic retail price and surcharge on roaming services, per minute SMS Concept (Monetary) For Period Debit tef:RegulatoryOperationsSumofDomesticRetailPriceAndSurchargeOnRoamingServicesPerSMS
4095 Sum of domestic retail price and surcharge on roaming services, per minute megabyte Concept (Monetary) For Period Debit tef:RegulatoryOperationsSumofDomesticRetailPriceAndSurchargeOnRoamingServicesPerMegabyte
4096 Limit for wholesale roaming caps per SMS Concept (Monetary) For Period Debit tef:RegulatoryOperationsLimitForWholesaleRoamingCapsPerSMS
4097 Limit for wholesale roaming caps per minute Concept (Monetary) For Period Debit tef:RegulatoryOperationsLimitForWholesaleRoamingCapsPerMinute
4098 Limit for wholesale roaming caps per data services glide path per british pound Concept (Monetary) For Period Debit tef:RegulatoryOperationsLimitForWholesaleRoamingCapsonDataServicesGlidePathPerBritishPound
4099 Period to transpose directive into national laws Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodtoTransposeDirectiveIntoNationalLaws
4100 Period to identify operators of essential services Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodtoIdentifyOperatorsofEssentialServices
4101 Percentage of fines issued by the general data protection regulation Concept (Percent) For Period tef:RegulatoryOperationsPercentageOfFinesIssuedbytheGeneralDataProtectionRegulationForBreachofNewDataProtectionRules
4102 Percentage of fines issued Concept (Percent) For Period tef:RegulatoryOperationsPercentageOfFinesIssuedbytheGeneralDataProtectionRegulation
4103 Frequency of band (MHz) Concept (Integer) For Period tef:RegulatoryOperationsFrequencyofBand
4104 Wholesale price adopted (EUR per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsWholesalePriceAdoptedPerMinute
4105 Number of cities in competitive areas in wholesale broadband services Concept (Integer) For Period tef:RegulatoryOperationsNumberofCitiesinCompetitiveAreasinWholesaleBroadbandServices
4106 Period in which new broadband ethernet service will be operative Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodinWhichNewBroadbandEthernetServiceWillBeOperative
4107 Period of designation for provision of operator responsibility Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofDesignationForProvisionofOperatorResponsibility
4108 Broadband data connection (Mbit per second) Concept (Decimal) For Period tef:RegulatoryOperationsBroadbandDataConnectionPerSecond
4109 Percentage of fixed annual provision of invoiced operating income Concept (Percent) For Period tef:RegulatoryOperationsPercentageOfFixedAnnualProvisionofInvoicedOperatingIncome
4110 Percentage of gross revenue for open concessionaire companies Concept (Percent) For Period tef:RegulatoryOperationsPercentageofGrossRevenueforOpenConcessionaireCompanies
4111 Percentage of gross revenue for open concessionaire companies to provide pay TV services Concept (Percent) For Period tef:RegulatoryOperationsPercentageofGrossRevenueforOpenConcessionaireCompaniestoProvidePayTVServices
4112 Period of authorization of new entity assumed set of obligations Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofAuthorizationofNewEntityAssumedSetofObligations
4113 Frequency distribution analysis of spectrum brand (GHz) Concept (Decimal) For Period tef:RegulatoryOperationsFrequencyDistributionAnalysisofSpectrumBrand
4114 Frequency distribution analysis of further spectrum brand (GHz) Concept (Integer) For Period tef:RegulatoryOperationsFrequencyDistributionAnalysisofFurtherSpectrumBrand
4115 Mobile termination rates expiration (EUR per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsMobileTerminationRatesExpirationPerMinute
4116 Provisional decision for mobile termination rates expiration (EUR per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsProvisionalDecisionforMobileTerminationRatesExpirationPerMinute
4117 Fixed termination rates expiration (EUR per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsFixedTerminationRatesExpirationPerMinute
4118 Provisional decision for fixed termination rates expiration (EUR per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsProvisionalDecisionforFixedTerminationRatesExpirationPerMinute
4119 Internet surfing speed (Mbit per second) Concept (Integer) For Period tef:RegulatoryOperationsInternetSurfingSpeed
4120 Maximum internet surfing speed (Mbit per second) Concept (Integer) For Period tef:RegulatoryOperationsMaximumInternetSurfingSpeed
4121 Mobile wholesale termination rate (ppm) Concept (Integer) For Period tef:RegulatoryOperationsMobileWholesaleTerminationsRate
4122 Spectrum license (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofSpectrumLicenses
4123 Percentage of spectrum license indoor coverage Concept (Percent) For Period tef:RegulatoryOperationsPercentageofSpectrumLicenseIndoorCoverage
4124 Regulatory Operations, Amount of Spectrum License in Voice and Text Services Concept (Integer) For Period tef:RegulatoryOperationsAmountofSpectrumLicenseinVoiceandTextServices
4125 Spectrum license in voice and text services (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofSpectrumLicenseinVoiceandTextService
4126 Percentage of spectrum license in voice and text services Concept (Percent) For Period tef:RegulatoryOperationsPercentageofSpectrumLicenseinVoiceandTextServices
4127 Regulatory Operations, Amount of Forthcoming Option of Spectrum Concept (Integer) For Period tef:RegulatoryOperationsAmountofForthcomingOptionofSpectrum
4128 Forthcoming option of spectrum (GHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofForthcomingOptionsofSpectrum
4129 Number of participants in pre-merger notification regime Concept (Integer) For Period tef:RegulatoryOperationsNumberofParticipantsinPreMergerNotificationRegime
4130 Gross revenue, participant pre-merger notification regime Concept (Monetary) For Period Credit tef:RegulatoryOperationsGrossRevenueParticipantPreMergerNotificationRegime
4131 Gross revenue, other participant pre-merger notification regime Concept (Monetary) For Period Credit tef:RegulatoryOperationsGrossRevenueOtherParticipantPreMergerNotificationRegime
4132 Maximum time length for merger review procedure Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsMaximumTimeLengthforMergerReviewProcedure
4133 Extension of maximum time length for merger review procedure Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsExtensionofMaximumTimeLengthforMergerReviewProcedure
4134 Maximum period for radiofrequencies authorizations Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsMaximumPeriodforRadiofrequenciesAuthorizations
4135 Auctioned radiofrequencies licenses (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofAuctionedRadiofrequenciesLicenses
4136 Speed of network infrastructure access for data transmission in copper pairs or coaxial cables (Mbit per second) Concept (Integer) For Period tef:RegulatoryOperationsSpeedofNetworkInfrastructureAccessforDataTransmissioninCopperPairsorCoaxialCables
4137 Speed of wholesale fixed network infrastructure to transport local and long distance transmission (Mbit per second) Concept (Integer) For Period tef:RegulatoryOperationsSpeedofWholesaleFixedNetworkInfrastructuretoTransportLocalandLongDistancesTransmission
4138 Regulatory Operations, Speed of Wholesale Fixed Network Infrastructure to Transport Local and Long Distance Transmission Concept (Integer) For Period tef:RegulatoryOperationsSpeedofWholesaleFixedNetworkInfrastructuretoTransportLocalandLongDistanceTransmission
4139 Percentage of fixed termination fees operators without SMP Concept (Percent) For Period tef:RegulatoryOperationsPercentageofFixedTerminationFeesOperatorsWithoutSMP
4140 Percentage of decreasing bill between SMP and the non-SMP operators Concept (Percent) For Period tef:RegulatoryOperationsPercentageofDecreasingBillBetweenSMPandthenonSMPoperators
4141 Number of VU-M values (in Brazilian reals) applicable to Telefônica Brazil Concept (Percent) For Period tef:RegulatoryOperationsNumberofVUMValuesinBrazilianreisApplicabletoTelefnicaBrazil
4142 Number of license exchange agreement Concept (Integer) For Period tef:RegulatoryOperationsNumberofLicenseExchangeAgreement
4143 Blocks of license exchange agreement (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofBlocksofLicenseExchangesAgreement
4144 Blocks of license exchange agreement concessions (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofBlocksofLicenseExchangeAgreementConcession
4145 Number of license exchange agreement exchanged Concept (Integer) For Period tef:RegulatoryOperationsNumberofLicenseExchangeAgreementExchanged
4146 Blocks of license exchange agreement exchanged (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofBlocksofLicenseExchangeAgreementsExchanged
4147 Blocks of license exchange agreement concessions exchanged (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofBlocksofLicenseExchangeAgreementConcessionExchanged
4148 Cost of conflict resolutions regarding MTR (MXN per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsAmountPerMinuteUsedtoResolveConflictsRegardingMTR
4149 Number of consecutive occasions Concept (Integer) For Period tef:RegulatoryOperationsNumberofConsecutiveOccasions
4150 Period of consecutive occasions Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofConsecutiveOccasions
4151 Percentage of foreign direct investment allowed Concept (Percent) For Period tef:RegulatoryOperationsPercentageofForeignDirectInvestmentAllowed
4152 Period of extensible deadline for blackout analog Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofExtensibleDeadlineforBlackoutAnalog
4153 Population in service area (as a percent) Concept (Percent) For Period tef:RegulatoryOperationsPercentageofTotalPopulationinServiceArea
4154 Number of regional channels Concept (Integer) For Period tef:RegulatoryOperationsNumberofRegionalChannels
4155 Percentage of increase in administrative fines Concept (Percent) For Period tef:RegulatoryOperationsPercentageofIncreaseinAdministrativeFines
4156 Established obligation for TMCH to provide wholesale service (GHz) Concept (Integer) For Period tef:RegulatoryOperationsAmountofEstablishedObligationforTMCHToProvideWholesaleServices
4157 Service concession for transmitting data granted (MHz) Concept (Integer) For Period tef:RegulatoryOperationsServiceConcessionsforTransmittingDataGranted
4158 Frequency of bands awarded (MHz) Concept (Integer) For Period tef:RegulatoryOperationsFrequencyofBandsAward
4159 Block of frequency at national level (MHz) Concept (Integer) For Period tef:RegulatoryOperationsBlocksofFrequencyatNationalLevel
4160 Period of applicable tariffs for services provided Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofApplicableTariffsforServicesProvided
4161 Regulatory operations, license renewal Concept (Integer) For Period tef:RegulatoryOperationsLicenseRenewal
4162 Percentage of reduction of applicable tariffs for services provided Concept (Percent) For Period tef:RegulatoryOperationsPercentageofReductionofApplicableTariffsforServicesProvided
4163 Period of broadcasting service by subscription Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofBroadcastingServicebySubscription
4164 License renewal (MHz) Concept (Integer) For Period tef:RegulatoryOperationsLicensesRenewal
4165 Additional period for license renewal Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsAdditionalPeriodforLicenseRenewal
4166 Proportion of ownership interest in subsidiary (as a percent) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
4167 Proportion of ownership interests held by non-controlling interests Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
4168 Arbitration Tribunal Order to Pay, Amount Concept (Monetary) For Period Debit tef:ArbitrationTribunalOrdertoPayAmount
4169 Aggregate capital increase Concept (Monetary) As Of Credit tef:AggregateCapitalIncrease
4170 Notice Period for Intention to File Claim Concept (xbrli:durationItemType) For Period tef:NoticePeriodforIntentiontoFileClaim
4171 Symmetric termination rate (COP per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsSymmetricTerminationRatePerMinute
4172 Symmetric termination rate (COP) Concept (Monetary) For Period Credit tef:RegulatoryOperationsAmountofSymmetricTerminationRate
4173 Established operators and a symmetric termination rate (COP per minute) Concept (Monetary) For Period Debit tef:RegulatoryOperationsEstablishedOperatorsandaSymmetricTerminationRatePerMinute
4174 Established operators and a symmetric termination rate (COP) Concept (Monetary) For Period Credit tef:RegulatoryOperationsAmountofEstablishedOperatorsandaSymmetricTerminationRate
4175 Period of established operators and a symmetric termination rate Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofEstablishedOperatorsandaSymmetricTerminationRate
4176 Percentage of gross revenues for television services Concept (Percent) For Period tef:RegulatoryOperationsPercentageofGrossRevenuesforTelevisionServices
4177 Value per user (COP) Concept (Monetary) For Period Debit tef:RegulatoryOperationsAmountofColombianPesosPerUser
4178 Period of agreement to be in force Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodofAgreementtobeinForce
4179 Period to provide nationwide fixed telecommunications service Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsPeriodtoProvideNationwideFixedTelecommunicationsService
4180 Fixed telephones to mobile networks (PEN per second) Concept (Monetary) For Period Debit tef:RegulatoryOperationsFixedTelephonestoMobileNetworksPerSecond
4181 New MTRs that apply to Telefónica Del Perú and Claro (USD cents per minute) Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsNewMTRsThatApplytoTelefnicaDelPerandClaro
4182 Net value of reversible assets held Concept (Monetary) As Of Debit tef:NetValueofReversibleAssetsHeld
4183 Percentage of new MTRs that apply to Telefónica Del Perú and Claro Concept (Percent) For Period tef:RegulatoryOperationsPercentageofNewMTRsThatApplytoTelefnicaDelPerandClaro
4184 Frequency ranges owned by Telefonica (GHz) Concept (Decimal) For Period tef:RegulatoryOperationsFrequencyRangeOwnedbyTelefonica
4185 Amount of spectrum license Concept (Integer) For Period tef:RegulatoryOperationsAmountofSpectrumLicense
4186 Amount of established obligation for TMCH to provide wholesale service Concept (Decimal) For Period tef:RegulatoryOperationsAmountofEstablishedObligationforTMCHToProvideWholesaleService
4187 Service concession for transmitting data granted Concept (Integer) For Period tef:RegulatoryOperationsServiceConcessionforTransmittingDataGranted
4188 Frequency of bands awarded Concept (Integer) For Period tef:RegulatoryOperationsFrequencyofBandsAwarded
4189 Block of frequency at national level Concept (Integer) For Period tef:RegulatoryOperationsBlockofFrequencyatNationalLevel
4190 2467403 - Disclosure - Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group - Schedule of Activities Subject to Rate Regulation (Details) Network

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 http://www.telefonica.com/role/AppendixViKeyRegulatoryIssuesAndConcessionsAndLicensesHeldByTelefonicaGroupScheduleOfActivitiesSubjectToRateRegulationDetails
4191 Implied Table Table

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 implied:Table
4192 Disclosure of detailed information about service concession arrangements [abstract] Abstract ifrs-full:DisclosureOfServiceConcessionArrangementsAbstract
4193 Charge per minute Concept (Monetary) For Period Debit tef:RegulatoryOperationsChargePerMinute
4194 % Reduction of charge per minute Concept (Percent) For Period tef:RegulatoryOperationsPercentageofReductionofCharges
4195 Capacity Charge Concept (Monetary) For Period Debit tef:RegulatoryOperationsCapacityofCharge
4196 % Reduction of capacity charge Concept (Percent) For Period tef:RegulatoryOperationsPercentageofReductionofCapacityofCharge
4197 Charge per minute (average) Concept (Monetary) For Period Debit tef:RegulatoryOperationsChargePerMinuteAverage
4198 Capacity Charge (average) Concept (Monetary) For Period Debit tef:RegulatoryOperationsCapacityofChargeAverage
4199 2467404 - Disclosure - Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group - Schedule of Service Concession Arrangements (Details) Network

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 http://www.telefonica.com/role/AppendixViKeyRegulatoryIssuesAndConcessionsAndLicensesHeldByTelefonicaGroupScheduleOfServiceConcessionArrangementsDetails
4200 Disclosure of detailed information about service concession arrangements [table] Table

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 ifrs-full:DisclosureOfServiceConcessionArrangementsTable
4201 Range [axis] Axis ifrs-full:RangeAxis
4202 Ranges [member] Member ifrs-full:RangesMember
4203 Minimum Member ifrs-full:BottomOfRangeMember
4204 Maximum Member ifrs-full:TopOfRangeMember
4205 Maturity [axis] Axis ifrs-full:MaturityAxis
4206 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
4207 Expiring in 2031 Member tef:Expiringin2031Member
4208 Expiring in 2030 Member tef:Expiringin2030Member
4209 Expiring in 2030, Option 2 Member tef:Expiringin2030Option2Member
4210 Expiring in 2020 Member tef:Expiringin2020Member
4211 Expiring in 2020, Option 2 Member tef:Expiringin2020Option2Member
4212 Expiring in 2030, Option 3 Member tef:Expiringin2030Option3Member
4213 Expiring in 2030, Option 4 Member tef:Expiringin2030Option4Member
4214 Expiring in 2030, Option 5 Member tef:Expiringin2030Option5Member
4215 Expiring in 2020, Option 3 Member tef:Expiringin2020Option3Member
4216 Expiring in 2038, Option 2 Member tef:Expiringin2038Option2Member
4217 Indefinite, Option 1 Member tef:IndefiniteOption1Member
4218 Indefinite, Option 2 Member tef:IndefiniteOption2Member
4219 Indefinite, Option 3 Member tef:IndefiniteOption3Member
4220 Indefinite, Option 4 Member tef:IndefiniteOption4Member
4221 Indefinite, Option 5 Member tef:IndefiniteOption5Member
4222 Indefinite, Option 6 Member tef:IndefiniteOption6Member
4223 Indefinite, Option 7 Member tef:IndefiniteOption7Member
4224 Expiring in 2033 Member tef:Expiringin2033Member
4225 Expiring in 2025 Member tef:Expiringin2025Member
4226 Expiring in 2033, Option 2 Member tef:Expiringin2033Option2Member
4227 Expiring in 2033, Option 3 Member tef:Expiringin2033Option3Member
4228 Expiring in 2025, Option 1 Member tef:Expiringin2025Option1Member
4229 Expiring in 2025, Option 2 Member tef:Expiringin2025Option2Member
4230 Expiring in 2020, Option 4 Member tef:Expiringin2020Option4Member
4231 Expiring in 2025, Option 3 Member tef:Expiringin2025Option3Member
4232 Expiring in 2020, Option 5 Member tef:Expiringin2020Option5Member
4233 Expiring in 2025, Option 4 Member tef:Expiringin2025Option4Member
4234 Expiring in 2025, Option 5 Member tef:Expiringin2025Option5Member
4235 Expiring in 2025, Option 6 Member tef:Expiringin2025Option6Member
4236 Expiring in 2021 Member tef:Expiringin2021Member
4237 Expiring in 2027 Member tef:Expiringin2027Member
4238 Expiring in 2029 Member tef:Expiringin2029Member
4239 Expiring in 2020-2028 Member tef:Expiringin20202028Member
4240 Expiring in 2020-2023 Member tef:Expiringin20202023Member
4241 Expiring in 2020-2023, Option 2 Member tef:Expiringin20202023Option2Member
4242 Expiring in 2023, Option 2 Member tef:Expiringin2023Option2Member
4243 Expiring in 2027-2031 Member tef:Expiringin20272031Member
4244 Expiring in 2035 Member tef:Expiringin2035Member
4245 Expiring in 2045 Member tef:Expiringin2045Member
4246 Expiring in 2032-2033 Member tef:Expiringin20322033Member
4247 Expiring in 2043 Member tef:Expiringin2043Member
4248 Expiring in 2038 Member tef:Expiringin2038Member
4249 Expiring in 2037 Member tef:Expiringin2037Member
4250 Expiring in 2024 Member tef:Expiringin2024Member
4251 Expiring in 2023 Member tef:Expiringin2023Member
4252 Expiring in 2024, Option 2 Member tef:Expiringin2024Option1Member
4253 Expiring in 2018-2030 Member tef:Expiringin20182030Member
4254 Expiring in 2018-2030, Option 1 Member tef:Expiringin20182030Option1Member
4255 Expiring in 2018-2025-2030 Member tef:Expiringin201820252030Member
4256 Expiring in 2018-2030, Option 2 Member tef:Expiringin20182030Option2Member
4257 Expiring in 2018-2025-2030, Option 1 Member tef:Expiringin201820252030Option1Member
4258 Expiring in 2018-2030, Option 3 Member tef:Expiringin20182030Option3Member
4259 Expiring in 2018-2030, Option 4 Member tef:Expiringin20182030Option4Member
4260 Expiring in 2018-2025-2030, Option 2 Member tef:Expiringin201820252030Option2Member
4261 Expiring in 2028 Member tef:Expiringin2028Member
4262 Expiring in 2036 Member tef:Expiringin2036Member
4263 Expiring in 2028, Option 2 Member tef:Expiringin2028Option2Member
4264 Expiring in 2028, Option 3 Member tef:Expiringin2028Option3Member
4265 Expiring in 2030, Option 1 Member tef:Expiringin2030Option1Member
4266 Expiring in 2018 Member tef:Expiringin2018Member
4267 Expiring in 2022-2024 Member tef:Expiringin20222024Member
4268 Expiring in 2022 Member tef:Expiringin2022Member
4269 Expiring in 2022, Option 1 Member tef:Expiringin2022Option1Member
4270 Expiring in 2022, Option 2 Member tef:Expiringin2022Option2Member
4271 Expiring in 2026 Member tef:Expiringin2026Member
4272 Expiring in 2026, Option 1 Member tef:Expiringin2026Option1Member
4273 Expiring in 2026, Option 2 Member tef:Expiringin2026Option2Member
4274 Expiring in 2032 Member tef:Expiringin2032Member
4275 Expiring in 2032, Option 1 Member tef:Expiringin2032Option1Member
4276 Expiring in 2034 Member tef:Expiringin2034Member
4277 Expiring in 2023, Option 1 Member tef:Expiringin2023Option1Member
4278 Expiring in 2023, Option 3 Member tef:Expiringin2023Option3Member
4279 Expiring in 2036, Option 1 Member tef:Expiringin2036Option1Member
4280 Expiring in 2036, Option 2 Member tef:Expiringin2036Option2Member
4281 (Phantom) Expiring in 2020-2023, Option 2, Regions 1, 2', 3, 3', 4, 5, 6, 7, & 9 Member tef:Expiringin20202023Option2Regions123345679Member
4282 (Phantom) Expiring in 2020-2023, Option 2, Regions 2 & 8 Member tef:Expiringin20202023Option2Regions28Member
4283 (Phantom) Expiring in 2020-2023, Option 2, Regions 4' & 5' Member tef:Expiringin20202023Option2Regions45Member
4284 (Phantom) Expiring in 2020-2023, Option 2, Region 7' Member tef:Expiringin20202023Option2Region7Member
4285 (Phantom) Expiring in 2020-2023, Option 2, Regions 6', 7'' & 10 Member tef:Expiringin20202023Option2Regions6710Member
4286 (Phantom) Expiring in November 2032 Member tef:ExpiringinNovember2032Member
4287 (Phantom) Expiring in April 2033 Member tef:ExpiringinApril2033Member
4288 (Phantom) Expiring in 2018, Option 1 Member tef:Expiringin2018Option1Member
4289 (Phantom) Expiring in 2018, Option 3 Member tef:Expiringin2018Option3Member
4290 (Phantom) Expiring in 2018, Option 2 Member tef:Expiringin2018Option2Parenthetical1Member
4291 (Phantom) Expiring in 2025, Option 2 Member tef:Expiringin2025Option2ParentheticalMember
4292 (Phantom) Expiring in 2018 Member tef:Expiringin2018Parenthetical1Member
4293 (Phantom) Expiring in 2025 Member tef:Expiringin2025Parenthetical1Member
4294 (Phantom) Expiring in 2030 Member tef:Expiringin2030ParentheticalMember
4295 (Phantom) Expiring in 2018, Option 2 Member tef:Expiringin2018Option2ParentheticalMember
4296 (Phantom) Expiring in 2030, Option 2 Member tef:Expiringin2030Option2ParentheticalMember
4297 (Phantom) Expiring in 2018, Option 1 Member tef:Expiringin2018Option1ParentheticalMember
4298 (Phantom) Expiring in 2025, Option 1 Member tef:Expiringin2025Option1ParentheticalMember
4299 (Phantom) Expiring in 2022 Member tef:Expiringin2022ParentheticalMember
4300 (Phantom) Expiring in 2024 Member tef:Expiringin2024ParentheticalMember
4301 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
4302 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
4303 Spain Member country:ES
4304 United Kingdom Member country:GB
4305 Germany Member country:DE
4306 Brazil Member country:BR
4307 Argentina Member country:AR
4308 Chile Member country:CL
4309 Colombia Member country:CO
4310 Ecuador Member country:EC
4311 Mexico Member country:MX
4312 Peru Member country:PE
4313 Uruguay Member country:UY
4314 Venezuela Member country:VE
4315 Costa Rica Member country:CR
4316 El Salvador Member country:SV
4317 Guatamela Member country:GT
4318 Nicaragua Member country:NI
4319 Panama Member country:PA
4320 Disclosure of detailed information about service concession arrangements [line items] LineItems ifrs-full:DisclosureOfServiceConcessionArrangementsLineItems
4321 Frequency Concept (Decimal) For Period tef:RegulatoryOperationsConcessionsandLicensesFrequency
4322 Bandwidth (MHz) Concept (Decimal) For Period tef:RegulatoryOperationsConcessionsandLicenseBandwidth
4323 License extension term Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsLicenseExtensionTerm
4324 Initial term Concept (xbrli:durationItemType) For Period tef:RegulatoryOperationsInitialTerm
4325 Most common bandwidth (MHz) Concept (Integer) For Period tef:RegulatoryOperationsMostCommonBandwidths
4326 Additional bandwidth (MHz) Concept (Integer) For Period tef:RegulatoryOperationsAdditionalBandwidth
4327 Population in service area (as a percent) Concept (Percent) For Period tef:RegulatoryOperationsPercentageofTotalPopulationinServiceArea
4328 Licenses disabled and migrated (MHz) Concept (Integer) For Period tef:RegulatoryOperationsLicenseDisabledandMigrated
4329 Frequency usable (MHz) Concept (Integer) For Period tef:RegulatoryOperationsFrequenciesUsable
4330 Number of locations Concept (Integer) For Period tef:RegulatoryOperationsNumberofLocations
4331 Number of communication licenses Concept (Integer) For Period tef:RegulatoryOperationsNumberofCommunicationLicenses
4332 Regulatory Operations, Frequency Range Owned by Telefonica Concept (Decimal) For Period tef:RegulatoryOperationsFrequencyRangeOwnedbyTelefonica

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