ENEL GENERACION CHILE S.A. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 100000 - Document - Document and Entity Information Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DocumentDocumentAndEntityInformation
2 Implied Table Table

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3 Document And Entity Information [Abstract] Abstract eocc:DocumentAndEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
14 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
17 100010 - Statement - Consolidated Statements of Financial Position Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfFinancialPosition
18 Implied Table Table

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19 Statement Of Financial Position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
20 ASSETS Abstract ifrs-full:AssetsAbstract
21 CURRENT ASSETS Abstract ifrs-full:CurrentAssetsAbstract
22 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
23 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
24 Other current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
25 Trade and other current receivables, net Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
26 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
27 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
28 Current taxes receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
29 Non-current assets and disposal groups held for sale or distribution to owners Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
30 TOTAL CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
31 NON-CURRENT ASSETS Abstract ifrs-full:NoncurrentAssetsAbstract
32 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
33 Other non-current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
34 Trade and other non-current receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
35 Investments accounted for using the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
36 Intangible assets other than goodwill, net Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
37 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
38 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
39 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
40 TOTAL NON-CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
41 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
42 LIABILITIES AND EQUITY Abstract ifrs-full:EquityAndLiabilitiesAbstract
43 CURRENT LIABILITIES Abstract ifrs-full:CurrentLiabilitiesAbstract
44 Other current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
45 Trade and other current payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
46 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
47 Current provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
48 Current tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
49 Other current non-financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentNonfinancialLiabilities
50 TOTAL CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
51 NON-CURRENT LIABILITIES Abstract ifrs-full:NoncurrentLiabilitiesAbstract
52 Other non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
53 Other non-current payables Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
54 Non-current accounts payables to related parties Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToRelatedParties
55 Non-current provisions, other than for employee benefits Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
56 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
57 Non-current provisions for employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
58 TOTAL NON-CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
59 TOTAL LIABILITIES Concept (Monetary) As Of Credit ifrs-full:Liabilities
60 EQUITY Abstract ifrs-full:EquityAbstract
61 Issued capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
62 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
63 Share premium Concept (Monetary) As Of Credit ifrs-full:SharePremium
64 Other reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
65 Equity attributable to Shareholders of the Parent Company Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
66 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
67 TOTAL EQUITY Concept (Monetary) As Of Credit ifrs-full:Equity
68 TOTAL LIABILITIES AND EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
69 100020 - Statement - Consolidated Statements of Comprehensive Income, by Nature Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeByNature
70 Implied Table Table

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71 Income Statement [Abstract] Abstract ifrs-full:IncomeStatementAbstract
72 Profit (loss) Abstract ifrs-full:ProfitLossAbstract
73 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
74 Other operating income Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
75 Revenues and Other Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
76 Raw materials and consumables used Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
77 Contribution Margin from continuing operations Concept (Monetary) For Period Credit ifrs-full:GrossProfit
78 Other work performed by the entity and capitalized Concept (Monetary) For Period Credit ifrs-full:OtherWorkPerformedByEntityAndCapitalised
79 Employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
80 Depreciation and amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
81 Impairment loss recognized in the period’s profit or loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
82 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
83 Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
84 Other gains, net Concept (Monetary) For Period Credit ifrs-full:OtherGainsLosses
85 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
86 Financial costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
87 Share of profit (loss) of associates and joint ventures accounted for using the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
88 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
89 Gains from indexed assets and liabilities, net Concept (Monetary) For Period Credit eocc:ProfitLossFromIndexedAssetsAndLiabilities
90 Income from continuing operations before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
91 Income tax expense, continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
92 NET INCOME FROM CONTINUING OPERATIONS Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
93 Discontinued operations Abstract eocc:DiscontinuedOperationsAbstract
94 Profit after tax for the year from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
95 NET PROFIT FOR THE YEAR Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
96 Net profit for the year attributable to Abstract ifrs-full:ProfitLossAttributableToAbstract
97 Shareholders of the parent company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
98 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
99 Basic earnings per share Abstract ifrs-full:BasicEarningsPerShareAbstract
100 Basic earnings per share from continuing operations Concept (Share) For Period ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
101 Basic earnings per share from discontinued operation Concept (Share) For Period ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
102 Total Basic earnings per share Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
103 Weighted average number of shares of common stock Concept (Shares) For Period ifrs-full:WeightedAverageShares
104 Diluted earnings per share Abstract ifrs-full:DilutedEarningsPerShareAbstract
105 Diluted earnings per share from continuing operations Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShareFromContinuingOperations
106 Diluted earnings per share from discontinued operation Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShareFromDiscontinuedOperations
107 Total Diluted earnings per share Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
108 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
109 Components of other comprehensive income (loss) that will not be reclassified subsequently to profit or loss, before income taxes Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract
110 Remeasurement losses from defined benefit plans Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
111 Other comprehensive loss that will not be reclassified subsequently to profit or loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTax
112 Components of other comprehensive income (loss) that will be reclassified subsequently to profit or loss, before income taxes Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract
113 Foreign currency translation losses, net Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
114 Gains (losses) from available-for-sale financial assets, net Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
115 Net gains (losses) from cash flow hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
116 Reclassification adjustments on cash flow hedges Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax
117 Share of other comprehensive income from investments accounted for using the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax
118 Other comprehensive loss that will be reclassified subsequently to profit or loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTax
119 Total other comprehensive income (loss), before income taxes Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTax
120 Income taxes related to components of other comprehensive income (loss) that will not be reclassified subsequently to profit or loss Abstract ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossAbstract
121 Income tax related to defined benefit plans Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
122 Income tax related to components of other comprehensive income (loss) that will not be reclassified subsequently to profit or loss Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss
123 Income taxes related to components of other comprehensive income (loss) that will be reclassified subsequently to profit or loss, before income taxes Abstract ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossAbstract
124 Income tax related to cash flow hedge Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
125 Income tax related to available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
126 Income taxes related to components of comprehensive income (losses) that will be reclassified subsequently to profit or loss Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss
127 Total Other Comprehensive Income (Loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
128 TOTAL COMPREHENSIVE INCOME Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
129 Comprehensive income (loss) attributable to Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
130 Shareholders of the parent company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
131 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
132 100040 - Statement - Consolidated Statements of Changes in Equity Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfChangesInEquity
133 Statement Of Changes In Equity [Table] Table

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ifrs-full:StatementOfChangesInEquityTable
134 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
135 Equity [member] Member ifrs-full:EquityMember
136 Issued Capital [Member] Member ifrs-full:IssuedCapitalMember
137 Share Premium [Member] Member ifrs-full:SharePremiumMember
138 Reserve for Exchange Differences in Foreign Currency Translation [Member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
139 Reserve for Cash Flow Hedges [Member] Member ifrs-full:ReserveOfCashFlowHedgesMember
140 Reserve for Gains and Losses for Defined Benefit Plans [Member] Member ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember
141 Reserve for Gains and Losses on Remeasuring Available-for-Sale Financial Assets [Member] Member ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
142 Other Miscellaneous Reserves [Member] Member ifrs-full:MiscellaneousOtherReservesMember
143 Other Reserves Related to Assets Held for Sale and Disposal Groups [Member] Member ifrs-full:AmountRecognisedInOtherComprehensiveIncomeAndAccumulatedInEquityRelatingToNoncurrentAssetsOrDisposalGroupsHeldForSaleMember
144 Total Reserves Other than Retained Earnings [Member] Member ifrs-full:OtherReservesMember
145 Retained Earnings [Member] Member ifrs-full:RetainedEarningsMember
146 Equity Attributable to Shareholders of the Parent Company [Member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
147 Non- controlling Interests [Member] Member ifrs-full:NoncontrollingInterestsMember
148 Statement Of Changes In Equity [Line Items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
149 Equity beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
150 Changes in equity Abstract ifrs-full:ChangesInEquityAbstract
151 Comprehensive income Abstract ifrs-full:ComprehensiveIncomeAbstract
152 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
153 Other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
154 TOTAL COMPREHENSIVE INCOME Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
155 Dividends Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
156 Increase (decrease) from distribution to owners Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherDistributionsToOwners
157 Increase (decrease) from other changes Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
158 Total changes in equity Concept (Monetary) For Period Credit ifrs-full:ChangesInEquity
159 Equity Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
160 100050 - Statement - Consolidated Statements of Cash Flow, Direct Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfCashFlowDirect
161 Implied Table Table

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162 Statement Of Cash Flows [Abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
163 Types of collection from operating activities Abstract ifrs-full:ClassesOfCashReceiptsFromOperatingActivitiesAbstract
164 Collections from the sale of goods and services Concept (Monetary) For Period Debit ifrs-full:ReceiptsFromSalesOfGoodsAndRenderingOfServices
165 Collections from royalties, payments, commissions, and other income from ordinary activities Concept (Monetary) For Period Debit ifrs-full:ReceiptsFromRoyaltiesFeesCommissionsAndOtherRevenue
166 Collections from premiums and services, annual payments, and other benefits from policies held Concept (Monetary) For Period Debit ifrs-full:ReceiptsFromPremiumsAndClaimsAnnuitiesAndOtherPolicyBenefits
167 Other collections from operating activities Concept (Monetary) For Period Debit ifrs-full:OtherCashReceiptsFromOperatingActivities
168 Types of payment in cash from operating activities Abstract ifrs-full:ClassesOfCashPaymentsAbstract
169 Payments to suppliers for goods and services Concept (Monetary) For Period Credit ifrs-full:PaymentsToSuppliersForGoodsAndServices
170 Payments to and on behalf of employees Concept (Monetary) For Period Credit ifrs-full:PaymentsToAndOnBehalfOfEmployees
171 Payments on premiums and services, annual payments, and other obligations from policies held Concept (Monetary) For Period Credit ifrs-full:PaymentsForPremiumsAndClaimsAnnuitiesAndOtherPolicyBenefits
172 Payments to tax and other payments for operating activities Concept (Monetary) For Period Credit eocc:PaymentsToTaxAndOtherCashPaymentsFromOperatingActivities
173 Cash generated from operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
174 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
175 Other outflows of cash Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities
176 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
177 Cash flows from investment activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
178 Cash collections from the loss of control of subsidiaries or other businesses Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
179 Other collections from the sale of equity or debt instruments belonging to other entities Concept (Monetary) For Period Debit ifrs-full:OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities
180 Other payments to acquire stakes in joint ventures Concept (Monetary) For Period Credit ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
181 Loans to related parties Concept (Monetary) For Period Credit ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
182 Proceeds from the sale of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
183 Purchases of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
184 Purchases of intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
185 Payments from future, forward, option and swap contracts Concept (Monetary) For Period Credit ifrs-full:CashPaymentsForFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
186 Collections from future, forward, option and swap contracts Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
187 Collections of loans to related parties Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties
188 Dividends received Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedClassifiedAsInvestingActivities
189 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsInvestingActivities
190 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
191 Cash flows from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
192 Total proceeds from loans Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
193 Proceeds from long-term loans Concept (Monetary) For Period Debit ifrs-full:ProceedsFromNoncurrentBorrowings
194 Proceeds from short-term loans Concept (Monetary) For Period Debit ifrs-full:ProceedsFromCurrentBorrowings
195 Loans from related parties Concept (Monetary) For Period Debit eocc:ProceedsFromRelatedParties
196 Payments on borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
197 Payments on financial lease liabilities Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
198 Repayments of loans from related parties Concept (Monetary) For Period Credit eocc:PaymentsToRelatedParties
199 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
200 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
201 Other outflows of cash Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
202 Net cash used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
203 Net (decrease) increase in cash and cash equivalents before the effect of exchange rate changes Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
204 Effect of exchange rate changes on cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
205 Net (decrease) increase in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
206 Cash and cash equivalents at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
207 Cash and cash equivalents at the end of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
208 100060 - Disclosure - The Group's Activities and Financial Statements Network

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209 Implied Table Table

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210 Disclosure Of Notes And Other Explanatory Information [Abstract] Abstract eocc:DisclosureOfNotesAndOtherExplanatoryInformationAbstract
211 The Group's Activities and Financial Statements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
212 100070 - Disclosure - Basis of Presentation of the Consolidated Financial Statements Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBasisOfPresentationOfConsolidatedFinancialStatements
213 Implied Table Table

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214 Statement Of Compliance And Basis Of Presentation [Abstract] Abstract eocc:StatementOfComplianceAndBasisOfPresentationAbstract
215 Basis of Presentation of the Consolidated Financial Statements Concept (Text Block (HTML)) For Period eocc:DisclosureOfBasisOfPresentationOfTheConsolidatedFinancialStatementsExplanatory
216 100080 - Disclosure - Accounting Policies Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPolicies
217 Implied Table Table

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218 Disclosure Of Changes In Accounting Estimates [Abstract] Abstract ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
219 Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
220 100090 - Disclosure - Sector Regulation and Electricity System Operations Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSectorRegulationAndElectricitySystemOperations
221 Implied Table Table

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222 Disclosure Of Information About Amounts Recognised In Relation To Regulatory Deferral Account Balances [Abstract] Abstract ifrs-full:DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesAbstract
223 Sector Regulation and Electricity System Operations Concept (Text Block (HTML)) For Period eocc:DisclosureOfSectorRegulationsAndElectricitySystemOperationsExplanatory
224 100100 - Disclosure - Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners Network

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225 Implied Table Table

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226 Noncurrent Assets Or Disposal Groups Classified As Held For Sale Or As Held For Distribution To Owners [Abstract] Abstract ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwnersAbstract
227 Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
228 100110 - Disclosure - Cash and Cash Equivalents Network

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229 Implied Table Table

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230 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
231 Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
232 100120 - Disclosure - Other Financial Assets Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialAssets
233 Implied Table Table

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234 Disclosure Of Other Financial Assets [Abstract] Abstract eocc:DisclosureOfOtherFinancialAssetsAbstract
235 Other Financial Assets Concept (Text Block (HTML)) For Period eocc:DisclosureOfOtherFinancialAssetsExplanatory
236 100130 - Disclosure - Trade and Other Receivables Network

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237 Implied Table Table

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238 Disclosure Of Trade And Other Receivables [Abstract] Abstract eocc:DisclosureOfTradeAndOtherReceivablesAbstract
239 Trade and Other Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
240 100140 - Disclosure - Balances and Transactions With Related Parties Network

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241 Implied Table Table

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242 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
243 Balances and Transactions With Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
244 100150 - Disclosure - Inventories Network

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245 Implied Table Table

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246 Classes Of Inventories [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
247 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
248 100160 - Disclosure - Current Tax Receivables and Payables Network

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252 100170 - Disclosure - Investments Accounted for Using the Equity Method Network

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253 Implied Table Table

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255 Investments Accounted for Using the Equity Method Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
256 100180 - Disclosure - Intangible Assets Other than Goodwill, Net Network

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257 Implied Table Table

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259 Intangible Assets Other than Goodwill, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
260 100190 - Disclosure - Goodwill Network

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261 Implied Table Table

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262 Disclosure Of Goodwill [Abstract] Abstract eocc:DisclosureOfGoodwillAbstract
263 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGoodwillExplanatory
264 100200 - Disclosure - Property, Plant and Equipment, Net Network

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267 Property, Plant and Equipment, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
268 100210 - Disclosure - Deferred Taxes Network

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269 Implied Table Table

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270 Major Components Of Tax Expense Income [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
271 Deferred Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredIncomeExplanatory
272 100220 - Disclosure - Other Financial Liabilities Network

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273 Implied Table Table

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274 Disclosure Of Financial Liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
275 Other Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
276 100230 - Disclosure - Risk Management Policy Network

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277 Implied Table Table

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278 Disclosure Of Risk Management [Abstract] Abstract eocc:DisclosureOfRiskManagementAbstract
279 Risk Management Policy Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
280 100240 - Disclosure - Financial Instruments Network

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281 Implied Table Table

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282 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
283 Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
284 100250 - Disclosure - Trade and Other Payables Network

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286 Trade And Other Payables [Abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
287 Trade and Other Payables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
288 100260 - Disclosure - Provisions Network

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291 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
292 100270 - Disclosure - Employee Benefit Obligations Network

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295 Employee Benefit Obligations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
296 100280 - Disclosure - Total Equity Network

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297 Implied Table Table

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298 Equity [Abstract] Abstract ifrs-full:EquityAbstract
299 Total Equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
300 100290 - Disclosure - Revenue and Other Income Network

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303 Revenue and Other Income Concept (Text Block (HTML)) For Period eocc:DisclosureOfRevenueAndOtherOperatingIncomeExplanatory
304 100300 - Disclosure - Raw Materials and Consumables Used Network

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305 Implied Table Table

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306 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
307 Raw Materials and Consumables Used Concept (Text Block (HTML)) For Period eocc:DisclosureOfRawMaterialsAndConsumablesUsedExplanatory
308 100310 - Disclosure - Employee Benefits Expense Network

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310 Classes Of Employee Benefits Expense [Abstract] Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
311 Employee Benefits Expense Concept (Text Block (HTML)) For Period eocc:DisclosureOfEmployeeBenefitsExpenseExplanatory
312 100320 - Disclosure - Depreciation, Amortization and Impairment Losses Network

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313 Implied Table Table

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315 Depreciation, Amortization and Impairment Losses Concept (Text Block (HTML)) For Period eocc:DisclosureOfDepreciationAndAmortisationExpenseAndImpairmentLossesAndReversalOfImpairmentLossesExplanatory
316 100330 - Disclosure - Other Expenses by Nature Network

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318 Disclosure Of Expenses By Nature [Abstract] Abstract eocc:DisclosureOfExpensesByNatureAbstract
319 Other Expenses by Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory
320 100340 - Disclosure - Other Gains (Losses) Network

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321 Implied Table Table

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322 Other Gains And Losses [Abstract] Abstract eocc:OtherGainsAndLossesAbstract
323 Other Gains, Net Concept (Text Block (HTML)) For Period eocc:DisclosureOfCompositionOfOtherGainsLossesExplanatory
324 100350 - Disclosure - Financial Results Network

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325 Implied Table Table

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326 Financial Results [Abstract] Abstract eocc:FinancialResultsAbstract
327 Financial Results Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinancialResultsExplanatory
328 100360 - Disclosure - Income Taxes Network

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330 Income Taxes [Abstract] Abstract eocc:IncomeTaxesAbstract
331 Income Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
332 100370 - Disclosure - Supplemental Disaggregated Financial Information Network

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335 Supplemental Disaggregated Financial Information Concept (Text Block (HTML)) For Period eocc:DisclosureOfSupplementalDisaggregatedFinancialInformationExplanatory
336 100380 - Disclosure - Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments Network

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339 Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments Concept (Text Block (HTML)) For Period eocc:DisclosureOfThirdPartyGuaranteesOtherContingentAssetsAndLiabilitiesAndOtherCommitmentsExplanatory
340 100390 - Disclosure - Personnel Figures Network

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342 Number And Average Number Of Employees [Abstract] Abstract ifrs-full:NumberAndAverageNumberOfEmployeesAbstract
343 Personnel Figures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
344 100400 - Disclosure - Sanctions Network

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346 Sanctions [Abstract] Abstract eocc:SanctionsAbstract
347 Sanctions Concept (Text Block (HTML)) For Period eocc:DisclosureOfSanctionsExplanatory
348 100410 - Disclosure - Environment Network

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350 Environmental Matters [Abstract] Abstract eocc:EnvironmentalMattersAbstract
351 Environment Concept (Text Block (HTML)) For Period eocc:DisclosureOfEnvironmentalRelatedExpensesExplanatory
352 100420 - Disclosure - Financial Information on Subsidiaries, Summarized Network

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355 Financial Information on Subsidiaries, Summarized Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinancialInformationOfConsolidatedSubsidiariesExplanatory
356 100430 - Disclosure - Subsequent Events Network

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359 Subsequent Events Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
360 100440 - Disclosure - Appendix 1 Group Companies Network

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362 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
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364 100450 - Disclosure - Appendix 2 Changes in the Scope of Consolidation Network

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366 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
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368 100460 - Disclosure - Appendix 3 Associates and Joint Ventures Network

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370 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
371 Appendix 3 Associates and Joint Ventures Concept (Text Block (HTML)) For Period eocc:DisclosureOfAssociatesAndJointVenturesExplanatory
372 100470 - Disclosure - Appendix 4 Additional Information on Financial Debt Network

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376 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
377 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
378 Other Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
379 100480 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency Network

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382 Appendix 5 Detail of Assets and Liabilities in Foreign Currency Concept (Text Block (HTML)) For Period eocc:DisclosureOfAssetsAndLiabilitiesDenominatedInForeignCurrenciesExplanatory
383 100490 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 Network

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387 100500 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers Network

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391 100510 - Disclosure - Accounting Policies (Policies) Network

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395 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
396 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory
397 Intangible assets other than goodwill Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
398 Impairment of non-financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
399 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
400 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
401 Fair value measurement Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory
402 Investments accounted for using the equity method Concept (Text Block (HTML)) For Period eocc:DescriptionOfAccountingPolicyForInvestmentsAccountedForUsingTheEquityMethodExplanatory
403 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
404 Non-current assets and disposal groups and liabilities associated held for sale or distribution to owners and discontinued operations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory
405 Treasury shares Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTreasurySharesExplanatory
406 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
407 Translation of foreign currency balances Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
408 Current/non-current classification Concept (Text Block (HTML)) For Period eocc:DescriptionOfAccountingPolicyForCurrentAndNoncurrentClassificationExplanatory
409 Income taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
410 Revenue and expense recognition Concept (Text Block (HTML)) For Period eocc:DescriptionOfAccountingPolicyForRevenueAndExpenseRecognitionExplanatory
411 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
412 Dividends Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory
413 Statement of cash flows Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForCashFlowsExplanatory
414 100520 - Disclosure - Accounting Policies (Tables) Network

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417 Summary of Estimated Useful Lives of Property, Plant and Equipment Concept (Text Block (HTML)) For Period eocc:DisclosureOfPropertyPlantAndEquipmentEstimatedUsefulLifeExplanatory
418 100530 - Disclosure - Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners (Tables) Network

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421 Summary of Investment in Hidroelectricas de Aysen S.A. Classified as Non-current Assets Held For Distribution To the Owners Concept (Text Block (HTML)) For Period eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsClassifiedAsHeldForSaleExplanatory
422 Summary of Additional Financial Information About Hidroaysen Concept (Text Block (HTML)) For Period eocc:DisclosureOfAdditionalFinancialInformationExplanatory
423 Summary of Assets and Liabilities Classified as Held for Distribution to Owners which Relate to the Groups Operations Concept (Text/String) For Period eocc:DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForDistributionToOwnersExplanatory
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425 Summary of Accumulated Other Comprehensive Loss Amounts in Equity Reserves Concept (Text Block (HTML)) For Period eocc:SummaryOfOtherComprehensiveIncomeAmountsAccumulatedInEquityReservesExplanatory
426 Summary of Net Cash Flows from Operating Investing and Financing Activities Concept (Text/String) For Period eocc:DisclosureOfNetCashFlowsFromDiscontinuedOperationsExplanatory
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430 Summary of Cash and Cash Equivalents Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatory
431 Summary of Cash and Cash Equivalents by Currency Concept (Text Block (HTML)) For Period eocc:DisclosureOfCashAndCashEquivalentsByCurrencyExplanatory
432 Summary of Proceeds Received from Sale of Ownership Interest in Associate Concept (Text Block (HTML)) For Period eocc:DisclosureOfNetCashAndCashEquivalentsUsedInAcquisitionExplanatory
433 Summary of Reconciliation of Liabilities Arising From Financing Activities Concept (Text Block (HTML)) For Period eocc:DisclosureOfReconciliationOfCashAndCashEquivalentsExplanatory
434 100550 - Disclosure - Other Financial Assets (Tables) Network

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438 100560 - Disclosure - Trade and Other Receivables (Tables) Network

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442 Schedule of Unimpaired Past Due Trade Receivables Concept (Text Block (HTML)) For Period ifrs-full:AnalysisOfAgeOfFinancialAssetsThatArePastDueButNotImpaired
443 Summary of Reconciliation of Changes in the Allowance for Impairment of Trade Receivables Concept (Text Block (HTML)) For Period eocc:DisclosureOfReconciliationOfChangesInAllowanceForImpairmentOfTradeReceivablesExplanatory
444 100570 - Disclosure - Balances and Transactions With Related Parties (Tables) Network

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448 Summary of Significant Transactions and Effect on Income or Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
449 Summary of Compensation Paid to Members of the Board of Directors Concept (Text Block (HTML)) For Period eocc:DisclosureOfRemunerationCostsOfIndividualMembersOfBoardOfManagementExplanatory
450 Summary of Key Management Personnel Concept (Text Block (HTML)) For Period eocc:DisclosureOfCompensationOfKeyManagementPersonnelExplanatory
451 Summary of Compensation Received by Key Management Personnel Concept (Text Block (HTML)) For Period eocc:DisclosureOfKeyManagementPersonnelCompensationExplanatory
452 100580 - Disclosure - Inventories (Tables) Network

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456 100590 - Disclosure - Current Tax Receivables and Payables (Tables) Network

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460 100600 - Disclosure - Investments Accounted for Using the Equity Method (Tables) Network

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463 Schedule of Changes in Investments Accounted for with Equity Method Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantJudgementsAndAssumptionsMadeInRelationToInterestsInOtherEntitiesExplanatory
464 Summary of Financial Information from Financial Statements of Investments in Associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory
465 Schedule of Additional Financial Information on Investments in Joint Ventures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfJointVenturesExplanatory
466 100610 - Disclosure - Intangible Assets Other than Goodwill, Net (Tables) Network

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469 Summary of Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
470 Summary of Reconciliations of the Carrying Amounts of Intangible Assets Concept (Text Block (HTML)) For Period eocc:DisclosureOfReconciliationOfChangesInIntangibleAssetsExcludingGoodwilExplanatory
471 100620 - Disclosure - Goodwill (Tables) Network

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474 Summary of Goodwill by the Cash-Generating Unit or Group of Cash-Generating Units Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
475 100630 - Disclosure - Property, Plant and Equipment, Net (Tables) Network

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478 Summary of Property Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
479 Summary of Changes in Property Plant and Equipment, Net Concept (Text Block (HTML)) For Period eocc:DisclosureOfChangesInPropertyPlantAndEquipmentExplanatory
480 Schedule of Future Lease Payments Finance Leases Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory
481 Schedule of Total Future Lease Payments Concept (Text Block (HTML)) For Period eocc:DisclosureOfFutureMinimumLeasePaymentsUnderFinanceLeasesExplanatory
482 100640 - Disclosure - Deferred Taxes (Tables) Network

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483 Implied Table Table

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484 Major Components Of Tax Expense Income [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
485 Summary of Deferred Income Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
486 Effects of Deferred Tax on Components of Other Comprehensive Income Concept (Text Block (HTML)) For Period eocc:DisclosureOfEffectOfDeferredTaxOnComponentsOfOtherComprehensiveIncomeExplanatory
487 Summary of Reconciliation of Deferred Tax Movements Between Balance Sheet and Comprehensive Income Concept (Text Block (HTML)) For Period eocc:DisclosureOfReconciliationOfChangesInDeferredTaxMovementsBetweenBalanceSheetAndComprehensiveIncomeExplanatory
488 100650 - Disclosure - Other Financial Liabilities (Tables) Network

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489 Implied Table Table

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490 Disclosure Of Financial Liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
491 Schedule of Balances of Other Financial Liabilities Concept (Text Block (HTML)) For Period eocc:DisclosureOfOtherFinancialLiabilitiesExplanatory
492 Schedule of Interest-bearing Borrowings Concept (Text Block (HTML)) For Period eocc:DisclosureOfInterestBearingBorrowingsExplanatory
493 Summary of Bank Loans by Currency and Maturity Concept (Text Block (HTML)) For Period eocc:DisclosureOfBankLoansByCurrencyAndContractualMaturityExplanatory
494 Summary of Identification of Bank Borrowings by Company Concept (Text Block (HTML)) For Period eocc:DisclosureOfIdentificationOfBankLoansByCompanyExplanatory
495 Summary of Unsecured Liabilities by Currency and Maturity Concept (Text Block (HTML)) For Period eocc:DisclosureOfUnsecuredLiabilitiesByCurrencyAndMaturityExplanatory
496 Summary of Secured and Unsecured Liabilities by Company Concept (Text Block (HTML)) For Period eocc:DisclosureOfSecuredAndUnsecuredLiabilitiesExplanatory
497 Summary of Detail of Finance Lease Obligations Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinanceLeaseObligationsExplanatory
498 Summary of Changes in Reserve for Cash Flow Hedges Concept (Text Block (HTML)) For Period eocc:DisclosureOfReserveOfCashFlowHedgesExplanatory
499 100660 - Disclosure - Risk Management Policy (Tables) Network

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500 Implied Table Table

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502 Schedule of Financial Debt Structure Detailed by Interest Rates Net of Hedging Derivative Instruments Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinancialDebtAndRelatedFinancialInstrumentsExplanatory
503 100670 - Disclosure - Financial Instruments (Tables) Network

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504 Implied Table Table

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506 Summary of Financial Assets Classified by Type and Category Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
507 Summary of Financial Liabilities Classified by Type and Category Concept (Text Block (HTML)) For Period eocc:DisclosureInDetailOfFinancialLiabilitiesClassifiedByTypeAndCategoryExplanatory
508 Summary of Financial Derivative Transactions Qualifying as Hedge Instruments Resulted in Recognition of Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutHedgesExplanatory
509 Summary of Hedge Derivative Instruments and Their Corresponding Hedged Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfHedgeAccountingExplanatory
510 Summary of Financial Derivative Transactions Recorded at Fair Value Through Profit or Loss Resulted in the Recognition of Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutCreditExposuresDesignatedAsMeasuredAtFairValueThroughProfitOrLossExplanatory
511 Summary of Fair Value of Hedging and Non-hedging Derivatives Entered Into by the Group as Well as the Remaining Contractual Maturities Concept (Text Block (HTML)) For Period eocc:DisclosureOfFairValueOfHedgingAndNonhedgingDerivativesAndRemainingContractualMaturitiesExplanatory
512 Schedule of Financial Assets and Liabilities Measured at Fair Value Concept (Text Block (HTML)) For Period eocc:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesExplanatory
513 100680 - Disclosure - Trade and Other Payables (Tables) Network

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514 Implied Table Table

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516 Summary of Breakdown of Trade and Other Payables Concept (Text Block (HTML)) For Period eocc:DisclosureOfBreakdownOfTradeAndOtherPayablesExplanatory
517 Summary of Trade and Other Payables Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationAboutTradeAndOtherPayablesExplanatory
518 100690 - Disclosure - Provisions (Tables) Network

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519 Implied Table Table

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521 Summary of Breakdown of Provisions Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationAboutBreakdownOfProvisionsExplanatory
522 Summary of Changes in Provisions Concept (Text Block (HTML)) For Period eocc:DisclosureOfChangesInProvisionsExplanatory
523 100700 - Disclosure - Employee Benefit Obligations (Tables) Network

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524 Implied Table Table

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526 Summary of Post- employment Obligations Associated with Defined Benefits Plan Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
527 Summary of Changes in Post-employment Defined Benefit Obligations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
528 Summary of Defined Benefit Plans Expense Recognized in Statements of Comprehensive Income Concept (Text Block (HTML)) For Period eocc:DisclosureOfNetDefinedBenefitRecognizedInConsolidatedStatementOfComprehensiveIncomeExplanatory
529 Summary of Assumptions Used in Actuarial Calculation of Defined Benefits Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
530 Summary of Expected Flow for Benefits for Next Five Years Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutMaturityProfileOfDefinedBenefitObligationExplanatory
531 100710 - Disclosure - Total Equity (Tables) Network

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532 Disclosure Of Shareholders Equity [Table] Table

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535 Other Miscellaneous Reserves [Member] Member ifrs-full:MiscellaneousOtherReservesMember
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537 Summary of Dividends Paid Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDividendsExplanatory
538 Schedule of Currency Translation Adjustments Concept (Text Block (HTML)) For Period eocc:DisclosureOfForeignCurrencyTranslationExplanatory
539 Schedule of Other Reserves Within Equity Concept (Text Block (HTML)) For Period eocc:DisclosureOfOtherReservesExplanatory
540 Summary of Non-controlling Interests Concept (Text Block (HTML)) For Period eocc:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesExplanatory
541 100720 - Disclosure - Revenue and Other Income (Tables) Network

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542 Implied Table Table

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544 Summary of Revenues and Other Income Concept (Text Block (HTML)) For Period eocc:DisclosureOfInformationAboutRevenueAndOtherOperatingIncomeExplanatory
545 100730 - Disclosure - Raw Materials and Consumables Used (Tables) Network

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546 Implied Table Table

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547 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
548 Schedule of Raw Materials and Consumables Used Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationAboutRawMaterialsAndConsumablesUsedExplanatory
549 100740 - Disclosure - Employee Benefits Expense (Tables) Network

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550 Implied Table Table

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551 Classes Of Employee Benefits Expense [Abstract] Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
552 Summary of Employee Expenses Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationOnEmployeeBenefitsExpenseExplanatory
553 100750 - Disclosure - Depreciation, Amortization and Impairment Losses (Tables) Network

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554 Implied Table Table

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556 Summary of Depreciation, Amortization and Impairment losses Concept (Text Block (HTML)) For Period eocc:DisclosureOfDepreciationAmortizationAndImpairmentLossesExplanatory
557 100760 - Disclosure - Other Expenses by Nature (Tables) Network

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558 Implied Table Table

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559 Disclosure Of Expenses By Nature [Abstract] Abstract eocc:DisclosureOfExpensesByNatureAbstract
560 Summary Of Other Operating Expense Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationAboutOtherOperatingExpenseExplanatory
561 100770 - Disclosure - Other Gains, Net (Tables) Network

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562 Implied Table Table

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563 Other Gains And Losses [Abstract] Abstract eocc:OtherGainsAndLossesAbstract
564 Summary of Other Gains, Net Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationOtherGainsAndLossesExplanatory
565 100780 - Disclosure - Financial Results (Tables) Network

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566 Implied Table Table

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567 Financial Results [Abstract] Abstract eocc:FinancialResultsAbstract
568 Summary of Financial Income and Costs Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinanceIncomeAndFinanceCostsExplanatory
569 Summary of Effects on Exchange Differences and Application of Indexed Assets and Liabilities Concept (Text Block (HTML)) For Period eocc:DisclosureOfEffectOfForeignExchangeDifferenceOnIndexedAssetsAndLiabilitiesExplanatory
570 100790 - Disclosure - Income Taxes (Tables) Network

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571 Implied Table Table

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572 Income Taxes [Abstract] Abstract eocc:IncomeTaxesAbstract
573 Components of Income Tax Expense/(Benefit) Concept (Text Block (HTML)) For Period eocc:DisclosureOfComponentsOfIncomeTaxExplanatory
574 Reconciliation of Computed Income Tax Expense Concept (Text Block (HTML)) For Period eocc:DisclosureOfReconciliationOfTaxExpenseExplanatory
575 100800 - Disclosure - Supplemental Disaggregated Financial Information (Tables) Network

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576 Implied Table Table

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577 Disclosure Of Supplemental Disaggregated Financial Information [Abstract] Abstract eocc:DisclosureOfSupplementalDisaggregatedFinancialInformationAbstract
578 Summary of Supplemental Disaggregated Financial Information on Geographic Basis Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
579 100810 - Disclosure - Personnel Figures (Tables) Network

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580 Implied Table Table

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581 Number And Average Number Of Employees [Abstract] Abstract ifrs-full:NumberAndAverageNumberOfEmployeesAbstract
582 Summary of Number of Employees Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutEmployeesExplanatory
583 100820 - Disclosure - Environment (Tables) Network

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584 Implied Table Table

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585 Environmental Matters [Abstract] Abstract eocc:EnvironmentalMattersAbstract
586 Summary of Environmental Expenses Concept (Text Block (HTML)) For Period eocc:DisclosureOfEnvironmentalExpensesExplanatory
587 100830 - Disclosure - Financial Information on Subsidiaries, Summarized (Tables) Network

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588 Implied Table Table

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590 Summary of Financial Information on Subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
591 100840 - Disclosure - Appendix 1 Group Companies (Tables) Network

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592 Implied Table Table

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594 Schedule of Percentage of Control in Each Subsidiary Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailedInformationOfPercentageOfControlInSubsidiariesExplanatory
595 100850 - Disclosure - Appendix 2 Changes in the Scope of Consolidation (Tables) Network

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596 Implied Table Table

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597 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
598 Summary of Companies Eliminated From the Scope of Consolidation Concept (Text Block (HTML)) For Period eocc:DisclosureOfEntitiesExcludedFromConsolidationExplanatory
599 100860 - Disclosure - Appendix 3 Associates and Joint Ventures (Tables) Network

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600 Implied Table Table

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601 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
602 Summary of Investments Accounted for Using the Equity Method Concept (Text Block (HTML)) For Period eocc:DescriptionOfInvestmentInAssociatesAndJointVenturesExplanatory
603 100870 - Disclosure - Appendix 4 Additional Information on Financial Debt (Tables) Network

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604 Disclosure Of Financial Liabilities [Table] Table

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609 Summary of Bank Loans by Currency and Maturity Concept (Text Block (HTML)) For Period eocc:DisclosureOfBankLoansByCurrencyAndContractualMaturityExplanatory
610 Summary of Identification of Bank Borrowings by Company Concept (Text Block (HTML)) For Period eocc:DisclosureOfIdentificationOfBankBorrowingsByCompanyExplanatory
611 Summary of Unsecured Liabilities by Currency and Maturity Concept (Text Block (HTML)) For Period eocc:DisclosureOfUnsecuredLiabilitiesByCurrencyAndMaturityExplanatory
612 Summary of Secured and Unsecured Liabilities by Company Concept (Text Block (HTML)) For Period eocc:DisclosureOfSecuredAndUnsecuredLiabilitiesExplanatory
613 Summary of Detail of Finance Lease Obligations Concept (Text Block (HTML)) For Period eocc:DisclosureOfFinanceLeaseObligationsExplanatory
614 100880 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency (Tables) Network

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615 Implied Table Table

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617 Summary of Assets and Liabilities Denominated in Foreign Currencies Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailInformationAboutAssetsAndLiabilitiesDenominatedInForeignCurrenciesExplanatory
618 100890 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 (Tables) Network

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620 Disclosure Of Assets And Liabilities By Currency [Abstract] Abstract eocc:DisclosureOfAssetsAndLiabilitiesByCurrencyAbstract
621 Summary of Aging of Trade and Other Receivables Concept (Text Block (HTML)) For Period eocc:DisclosureOfAgeingOfTradeAndOtherReceivablesExplanatory
622 Summary of Trade and Other Receivables by Type of Portfolio Concept (Text Block (HTML)) For Period eocc:DisclosureOfTradeAndOtherReceivablesByTypeOfPortfolioExplanatory
623 Summary of Provisions and Write-offs Portfolio Concept (Text Block (HTML)) For Period eocc:DisclosureOfProvisionsAndWriteoffsPortfolioExplanatory
624 Summary of Number and Value of Operations Concept (Text Block (HTML)) For Period eocc:DisclosureOfNumberAndValueOfOperationsExplanatory
625 Trade Receivables by Aging Concept (Text Block (HTML)) For Period eocc:DisclosureOfGrossTradeReceivablesAgingAnalysisExplanatory
626 Trade Receivables by Type of Portfolio Concept (Text Block (HTML)) For Period eocc:DisclosureOfGrossTradeReceivablesPortfolioAnalysisExplanatory
627 Summary of Estimated Sales and Purchases of Energy and Capacity Concept (Text Block (HTML)) For Period eocc:DisclosureOfEstimatedSalesAndPurchasesOfEnergyAndCapacityExplanatory
628 100900 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers (Tables) Network

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629 Implied Table Table

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630 Details Of Due Dates Of Payments To Suppliers [Abstract] Abstract eocc:DetailsOfDueDatesOfPaymentsToSuppliersAbstract
631 Summary of Details of Due Dates of Payments to Suppliers Concept (Text Block (HTML)) For Period eocc:DisclosureOfDetailsOfDueDatesOfPaymentsToSuppliersExplanatory
632 100910 - Disclosure - The Group's Activities and Financial Statements - Additional Information (Detail) Network

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633 Disclosure Of Notes And Other Explanatory Information [Table] Table

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639 Number of employees Concept (Decimal) As Of ifrs-full:NumberOfEmployees
640 Average number of employees Concept (Decimal) For Period ifrs-full:AverageNumberOfEmployees
641 Disclosure - The Group's Activities and Financial Statements - Additional Information (Detail) [Line Items] LineItems eocc:DisclosureTheGroupSActivitiesAndFinancialStatementsAdditionalInformationDetailLineItems
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644 Share subscription condition Concept (Text/String) For Period eocc:ShareSubscriptionCondition
645 Aggregate ownership interest percentage Concept (Pure) For Period eocc:AggregateOwnershipInterestPercentage
646 Disclosure Of Notes And Other Explanatory Information [Line Items] LineItems eocc:DisclosureOfNotesAndOtherExplanatoryInformationLineItems
647 Proportion of ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
648 100920 - Disclosure - Basis of Presentation of the Consolidated Financial Statements (New Accounting Pronouncements) - Additional Information (Detail) Network

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649 Description Of Expected Impact Of Initial Application Of New Standards Or Interpretations [Table] Table

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655 IFRS 9 [Member] Member eocc:IFRSNineMember
656 IFRS 15 [Member] Member eocc:IFRSFifteenMember
657 IFRS 16 [Member] Member eocc:IFRSSixteenMember
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661 Amendments to IAS 40 [Member] Member eocc:AmendmentToIASFortyMember
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675 100930 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Additional Information (Detail) Network

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676 Statement Of Compliance And Basis Of Presentation [Table] Table

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682 Assets [member] Member ifrs-full:ClassesOfAssetsMember
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686 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
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688 Current quantitative requirement for hedge effectiveness test Concept (Percent) For Period eocc:CashFlowsOfHedgingInstrumentEffectiveRate
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690 Percentage of ownership interest in joint venture Concept (Text/String) For Period eocc:DescriptionOfOwnershipInterestInJointVenture
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693 100940 - Disclosure - Accounting Policies - Summary of Estimated Useful Lives of Property, Plant and Equipment (Detail) Network

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703 IT Equipment [Member] Member eocc:InformationTechnologyEquipmentMember
704 Fixtures and Fittings [Member] Member ifrs-full:FixturesAndFittingsMember
705 Motor Vehicles [Member] Member ifrs-full:MotorVehiclesMember
706 Civil Engineering Works at Hydroelectric Plants [Member] Member eocc:CivilEngineeringWorksAtHydroelectricPlantsMember
707 Electromechanical Equipment at Hydroelectric Plants [Member] Member eocc:ElectromechanicalEquipmentAtHydroelectricPlantsMember
708 Fuel Oil /Coal - Fired Power Plants [Member] Member eocc:FuelOilOrCoalFiredPowerPlantsMember
709 Combined Cycle Power Plants [Member] Member eocc:CombinedCyclePowerPlantsMember
710 Renewable Energy Power Plants [Member] Member eocc:RenewableEnergyPowerPlantsMember
711 Pipelines [Member] Member eocc:Pipelines1Member
712 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
713 Property, plant and equipment estimated useful lives Concept (xbrli:durationItemType) For Period eocc:EstimatedUsefulLivesOfPropertyPlantAndEquipment
714 100950 - Disclosure - Accounting Policies - Additional Information (Detail) Network

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715 Accounting Policies [Table] Table

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716 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
717 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
718 Computer Software [Member] Member ifrs-full:ComputerSoftwareMember
719 Range [axis] Axis ifrs-full:RangeAxis
720 Ranges [member] Member ifrs-full:RangesMember
721 Weighted average [Member] Member ifrs-full:WeightedAverageMember
722 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
723 Top of Range [Member] Member ifrs-full:TopOfRangeMember
724 Accounting policies [line items] LineItems eocc:AccountingPoliciesLineItems
725 Intangible assets, estimated useful life Concept (xbrli:durationItemType) For Period eocc:IntangibleAssetsEstimatedUsefulLife
726 Cash flow projection period Concept (Text/String) For Period ifrs-full:DescriptionOfPeriodsWhenCashFlowsExpectedToOccur
727 Future cash flows projections growth rate Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
728 Pre-tax discount rates Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
729 Current quantitative requirement for hedge effectiveness test Concept (Percent) For Period eocc:CashFlowsOfHedgingInstrumentEffectiveRate
730 Net income for each period absorbed, percentage Concept (Percent) For Period eocc:NetIncomeForEachPeriodAbsorbedPercentage
731 100960 - Disclosure - Sector Regulation and Electricity System Operations - Additional Information (Detail) Network

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732 Sector Regulations And Electricity System Operations [Table] Table

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eocc:SectorRegulationsAndElectricitySystemOperationsTable
733 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
734 Products and services [member] Member ifrs-full:ProductsAndServicesMember
735 Sistema Interconectado Central Member eocc:SistemaInterconectadoCentralMember
736 Sistema Interconectado del Norte Grande Member eocc:SistemaInterconectadoDelNorteGrandeMember
737 Supply Bidding No. 2015/02 Member eocc:SupplyBiddingNumberTwoThousandFifteenZeroTwoMember
738 Supply Bidding No. 2015/01 Member eocc:SupplyBiddingNumberTwoThousandFifteenZeroOneMember
739 Supply Bidding No. 2017/01 Member eocc:SupplyBiddingNumberTwoThousandSeventeenZeroOneMember
740 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
741 Customers [member] Member ifrs-full:MajorCustomersMember
742 Regulated Customers [Member] Member eocc:RegulatedCustomersMember
743 Range [axis] Axis ifrs-full:RangeAxis
744 Ranges [member] Member ifrs-full:RangesMember
745 Top of Range [Member] Member ifrs-full:TopOfRangeMember
746 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
747 Segments [axis] Axis ifrs-full:SegmentsAxis
748 Segments [member] Member ifrs-full:SegmentsMember
749 Generation Segment Member eocc:GenerationSegmentMember
750 Transmission Segment Member eocc:TransmissionSegmentMember
751 Distribution Segment Member eocc:DistributionSegmentMember
752 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
753 Consolidated [member] Member ifrs-full:ConsolidatedMember
754 Thermal Emission Tax [Member] Member eocc:ThermalEmissionTaxMember
755 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
756 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
757 Supply Contracts Member eocc:SupplyContractsMember
758 Sector Regulations And Electricity System Operations [Line Items] LineItems eocc:SectorRegulationsAndElectricitySystemOperationsLineItems
759 Number of electrical sectors Concept (Integer) As Of eocc:NumberOfElectricalSectors
760 Length of electrical grid Concept (num:lengthItemType) For Period eocc:LengthOfElectricalGrid
761 Maximum connected capacity of electrical supply Concept (num:powerItemType) For Period eocc:MaximumConnectedCapacityOfElectricalSupply
762 Connected capacity option range of electrical supply Concept (num:powerItemType) For Period eocc:ConnectedCapacityOptionRangeOfElectricalSupply
763 Minimum connected capacity for freely negotiate price of electrical supply Concept (num:powerItemType) For Period eocc:MinimumConnectedCapacityForFreelyNegotiatePriceOfElectricalSupply
764 Connected capacity for fixed price of electrical supply Concept (num:powerItemType) For Period eocc:ConnectedCapacityForFixedPriceOfElectricalSupply
765 Contract term for fixed price of electrical supply Concept (xbrli:durationItemType) For Period eocc:ContractAgreementTerm
766 Percentage of renewable energy requirement Concept (Percent) For Period eocc:RenewableEnergyPercentageOnEnergySold
767 Percentage of increase in energy requirement Concept (Percent) For Period eocc:IncreaseRateOfEnergyRequirementForNonconventionalRenewableEnergy
768 Target for renewable energy requirement Concept (Percent) For Period eocc:RenewableEnergyPercentageOnEnergySoldTarget
769 Target for power generated by non-conventional renewable energy Concept (Percent) For Period eocc:TargetsForNonconventionalRenewableEnergyRate
770 Period over which tariff setting process is carried out Concept (xbrli:durationItemType) For Period eocc:PeriodOverWhichTariffSettingProcessIsCarriedOut
771 Minimum discount rate fixed by authority for tariff setting Concept (Percent) As Of ifrs-full:DiscountRateUsedToReflectTimeValueOfMoneyRegulatoryDeferralAccountBalances
772 Description of expansion plan for transmission facilities Concept (Text/String) For Period ifrs-full:DescriptionOfCrossreferenceToDisclosuresAboutActivitiesSubjectToRateRegulation
773 Connected capacity to end customers Concept (Decimal) For Period eocc:ConnectedCapacityForEndCustomers
774 Description of price regulation process Concept (Text/String) For Period ifrs-full:DescriptionOfNatureAndExtentOfRateregulatedActivity
775 Description of nature of price regulation process Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRegulatoryRatesettingProcess
776 Annual investment costs rate Concept (Percent) For Period eocc:AnnualInvestmentCostsRate
777 Value added distribution ratio Concept (Percent) For Period eocc:ValueAddedDistributionRatio
778 Profitability margin range Concept (Percent) For Period eocc:ProfitMarginRange
779 Percentage of aggregate profitability industry range Concept (Percent) For Period eocc:AggregateProfitabilityRangeOfIndustryPercentage
780 Raw materials and consumables used Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
781 Blocks of energy awarded in bid Concept (Integer) For Period eocc:NumberOfEnergyBlocksAwarded
782 Energy blocks awarded unit Concept (num:energyItemType) For Period eocc:EnergyBlocksAwardedUnit
783 Percentage of energy utilization Concept (Percent) For Period eocc:PercentageOfEnergyUtilization
784 Weighted average price of energy per MWh Concept (Decimal) For Period eocc:WeightedAveragePriceOfEnergyPerUnit
785 Number of companies awarded with energy blocks Concept (Integer) For Period eocc:NumberOfCompaniesAwardedWithEnergyBlocks
786 Energy awarded unit per year Concept (num:energyItemType) For Period eocc:EnergyAwardedUnitPerYear
787 100970 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Additional Information (Detail) Network

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788 Disclosure Of Noncurrent Assets And Disposal Groups And Liabilities Associated Held For Sale Or Distribution To Owners [Table] Table

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eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsAndLiabilitiesAssociatedHeldForSaleOrDistributionToOwnersTable
789 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
790 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
791 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
792 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
793 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
794 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
795 Peru [Member] Member country:PE
796 Disclosure Of Noncurrent Assets And Disposal Groups And Liabilities Associated Held For Sale Or Distribution To Owners [Line Items] LineItems eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsAndLiabilitiesAssociatedHeldForSaleOrDistributionToOwnersLineItems
797 Ownership Concept (Percent) For Period eocc:ProportionOfOwnershipInterest
798 Impairment loss Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossInvestmentProperty
799 Percentage of ownership interest disposed Concept (Percent) For Period eocc:ProportionOfOwnershipInterestDisposed
800 Amount of sale of subsidiary Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
801 Investments accounted for using the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
802 Amounts received for the sale of subsidiaries Concept (Monetary) For Period Credit ifrs-full:ConsiderationPaidReceived
803 Gains on sale of investment Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfInvestments
804 Obligation to pay taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
805 100980 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Investment Classified as Non-current Assets Held For Distribution (Detail) Network

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806 Disclosure Of Noncurrent Assets And Disposal Groups Classified As Held For Sale [Table] Table

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eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsClassifiedAsHeldForSaleTable
807 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
808 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
809 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
810 Disclosure Of Noncurrent Assets And Disposal Groups Classified As Held For Sale [Line Items] LineItems eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsClassifiedAsHeldForSaleLineItems
811 Equity of Centrales Hidroeléctricas de Aysén S.A. Concept (Monetary) As Of Credit ifrs-full:Equity
812 Ownership Concept (Percent) For Period eocc:ProportionOfOwnershipInterest
813 Investments accounted for using the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
814 100990 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Additional Financial Information About Hidroaysen (Detail) Network

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815 Disclosure Of Noncurrent Assets And Disposal Groups Classified As Held For Sale [Table] Table

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eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsClassifiedAsHeldForSaleTable
816 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
817 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
818 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
819 Disclosure Of Noncurrent Assets And Disposal Groups Classified As Held For Sale [Line Items] LineItems eocc:DisclosureOfNoncurrentAssetsAndDisposalGroupsClassifiedAsHeldForSaleLineItems
820 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
821 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
822 Total Non Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
823 Land Concept (Monetary) As Of Debit ifrs-full:Land
824 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
825 Other fixed operating expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByFunction
826 Intererest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
827 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
828 101000 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners- Summary of Assets and Liabilities Classified as Held for Distribution to Owners (Detail) Network

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829 Disclosure Of Assets And Liabilities Classified As Held For Distribution To Owners [Table] Table

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eocc:DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForDistributionToOwnersTable
830 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
831 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
832 Classification As Held For Distribution To Owners [Member] Member eocc:ClassificationAsHeldForDistributionToOwnersMember
833 Disclosure Of Assets And Liabilities Classified As Held For Distribution To Owners [Line Items] LineItems eocc:DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForDistributionToOwnersLineItems
834 ASSETS Abstract ifrs-full:AssetsAbstract
835 CURRENT ASSETS Abstract ifrs-full:CurrentAssetsAbstract
836 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
837 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
838 Other current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
839 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
840 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
841 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
842 Current income tax receivables Concept (Monetary) As Of Debit eocc:CurrentIncomeTaxReceivables
843 TOTAL CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
844 NON-CURRENT ASSETS Abstract ifrs-full:NoncurrentAssetsAbstract
845 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
846 Other non-current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
847 Trade and other non-current receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
848 Investments accounted for using the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
849 Intangible assets other than goodwill, net Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
850 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
851 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
852 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
853 TOTAL NON-CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
854 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
855 LIABILITIES Abstract ifrs-full:LiabilitiesAbstract
856 CURRENT LIABILITIES Abstract ifrs-full:CurrentLiabilitiesAbstract
857 Other current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
858 Trade and other current payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
859 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
860 Current provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
861 Current tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
862 Other current non-financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentNonfinancialLiabilities
863 TOTAL CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
864 NON-CURRENT LIABILITIES Abstract ifrs-full:NoncurrentLiabilitiesAbstract
865 Other non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
866 Other non-current payables Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
867 Non-current provisions, other than for employee benefits Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
868 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
869 Non-current provisions for employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
870 Other non-current non-financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentNonfinancialLiabilities
871 TOTAL NON-CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
872 TOTAL LIABILITIES Concept (Monetary) As Of Credit ifrs-full:Liabilities
873 101010 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Schedule of Breakdown by Nature of Income from Discontinued Operations Net of Taxes (Detail) Network

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874 Disclosure Of Discontinued Operations [Table] Table

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eocc:DisclosureOfDiscontinuedOperationsTable
875 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
876 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
877 Discontinued Operations [Member] Member ifrs-full:DiscontinuedOperationsMember
878 Disclosure Of Discontinued Operations [Line Items] LineItems eocc:DisclosureOfDiscontinuedOperationsLineItems
879 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
880 Other operating income Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
881 Revenues and Other Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
882 Raw materials and consumables used Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
883 Contribution Margin from continuing operations Concept (Monetary) For Period Credit ifrs-full:GrossProfit
884 Other work performed by the entity and capitalized Concept (Monetary) For Period Credit ifrs-full:OtherWorkPerformedByEntityAndCapitalised
885 Employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
886 Depreciation and amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
887 Impairment losses Concept (Monetary) For Period ifrs-full:WritedownsReversalsOfPropertyPlantAndEquipment
888 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
889 Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
890 Other gains, net Concept (Monetary) For Period Credit ifrs-full:OtherGainsLosses
891 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
892 Financial costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
893 Share of profit (loss) of associates and joint ventures accounted for using the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
894 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
895 Income from continuing operations before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
896 Income tax expense Concept (Monetary) For Period Debit ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
897 NET PROFIT for the year from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
898 Income from discontinued operations Attributable to Abstract ifrs-full:ProfitLossAttributableToAbstract
899 Shareholders of the parent company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
900 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
901 Components of other comprehensive income (loss) that will not be reclassified subsequently to profit or loss, before income taxes Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract
902 Losses from defined benefit plans, net Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
903 Components of other comprehensive income (loss) that will be reclassified subsequently to profit or loss, before income taxes Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract
904 Foreign currency translation losses, net Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
905 Gains (losses) from available-for-sale financial assets, net Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
906 Net losses from cash flow hedges and reclassification adjustments on cash flow hedges, net of tax Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
907 Share of other comprehensive income from investments accounted for using the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax
908 Other comprehensive loss that will be reclassified subsequently to profit or loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTax
909 Comprehensive income (loss) attributable to Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
910 Shareholders of the parent company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
911 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
912 TOTAL COMPREHENSIVE INCOME Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
913 101030 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Accumulated Other Comprehensive Loss Amounts in Equity Reserves (Detail) Network

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914 Disclosure of Reserves within Equity [Table] Table

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ifrs-full:DisclosureOfReservesWithinEquityTable
915 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
916 Equity [member] Member ifrs-full:EquityMember
917 Other Reserves Related to Assets Held for Sale and Disposal Groups [Member] Member ifrs-full:AmountRecognisedInOtherComprehensiveIncomeAndAccumulatedInEquityRelatingToNoncurrentAssetsOrDisposalGroupsHeldForSaleMember
918 Disclosure of Reserves within Equity [Line Items] LineItems ifrs-full:DisclosureOfReservesWithinEquityLineItems
919 Exchange differences in foreign currency translation Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
920 Cash flow hedges Concept (Monetary) As Of Credit ifrs-full:ReserveOfCashFlowHedges
921 Gains and losses on remeasuring available-for-sale financial assets Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
922 Other miscellaneous reserves Concept (Monetary) As Of Credit eocc:OtherMiscellaneousReserves
923 Total Concept (Monetary) As Of Credit ifrs-full:OtherReserves
924 101040 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Net Cash Flows from Operating Investing and Financing Activities (Detail) Network

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925 Disclosure Of Discontinued Operations [Table] Table

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eocc:DisclosureOfDiscontinuedOperationsTable
926 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
927 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
928 Discontinued Operations [Member] Member ifrs-full:DiscontinuedOperationsMember
929 Disclosure Of Discontinued Operations [Line Items] LineItems eocc:DisclosureOfDiscontinuedOperationsLineItems
930 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
931 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
932 Net cash provided by (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
933 Net (decrease) increase in cash and cash equivalents before the effect of exchange rate changes Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
934 Effect of exchange rate changes on cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
935 Net (decrease) increase in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
936 Cash and cash equivalents at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
937 Cash and cash equivalents at the end of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
938 101050 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Network

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939 Implied Table Table

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940 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
941 Cash balances Concept (Monetary) As Of Debit ifrs-full:CashOnHand
942 Bank balances Concept (Monetary) As Of Debit ifrs-full:BalancesWithBanks
943 Time deposits Concept (Monetary) As Of Debit eocc:CashTimeDeposits
944 Other fixed-income instruments Concept (Monetary) As Of Debit eocc:OtherFixedIncomeInstruments
945 Total Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
946 101060 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents by Currency (Detail) Network

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947 Disclosure Of Cash And Cash Equivalents [Table] Table

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948 Currencies Axis eocc:CurrenciesAxis
949 Currency Member Member eocc:CurrencyMember
950 Chilean Peso [Member] Member currency:CLP
951 Argentine Peso [Member] Member currency:ARS
952 U.S. Dollar [Member] Member currency:USD
953 Disclosure Of Cash And Cash Equivalents [Line Items] LineItems eocc:DisclosureOfCashAndCashEquivalentsLineItems
954 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
955 101070 - Disclosure - Cash and Cash Equivalents - Summary of Proceeds Received from Sale of Ownership Interest in Associate (Detail) Network

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956 Disclosure Of Cash And Cash Equivalents [Table] Table

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957 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
958 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
959 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
960 Disclosure Of Cash And Cash Equivalents [Line Items] LineItems eocc:DisclosureOfCashAndCashEquivalentsLineItems
961 Amounts received for the sale of Electrogas S.A. Concept (Monetary) For Period Credit ifrs-full:ConsiderationPaidReceived
962 Loss of significant influence in Associate Concept (Monetary) For Period Debit ifrs-full:OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities
963 101080 - Disclosure - Cash and Cash Equivalents - Summary of Reconciliation of Liabilities Arising From Financing Activities (Detail) Network

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964 Disclosure Of Cash And Cash Equivalents [Table] Table

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965 Classes of liabilities [axis] Axis ifrs-full:ClassesOfLiabilitiesAxis
966 Liabilities [member] Member ifrs-full:LiabilitiesMember
967 Bank Loans [Member] Member eocc:BankLoansMember
968 Unsecured Obligations [Member] Member eocc:UnsecuredObligationsMember
969 Finance Leases [Member] Member eocc:FinancialLeasesMember
970 Financial Derivatives for Hedging [Member] Member eocc:FinancialDerivativesForHedgingMember
971 Loans to Related Parties [Member] Member eocc:LoansToRelatedPartiesMember
972 Other obligations [Member] Member eocc:OtherObligationsMember
973 Disclosure Of Cash And Cash Equivalents [Line Items] LineItems eocc:DisclosureOfCashAndCashEquivalentsLineItems
974 Balance as of 01-01-2017 Concept (Monetary) As Of Credit eocc:LiabilitiesArisingFromFinancingActivities
975 Financing Cash Flows Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
976 Financing Cash Flows Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughFinancingUsedInCashFlowsLiabilitiesArisingFromFinancingActivities
977 Financing Cash Flows Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughInterestPaidCashFlowsLiabilitiesArisingFromFinancingActivities
978 Financing Cash Flows Concept (Monetary) For Period Credit eocc:IncreaseDecreaseInLiabilitiesArisingFromFinancingActivities
979 Non-Cash Changes Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities
980 Non-Cash Changes Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
981 Non-Cash Changes Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughFinancialCostsLiabilitiesArisingFromFinancingActivities
982 Non-Cash Changes Concept (Monetary) For Period Credit eocc:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
983 Balance as of 12-31-2017 Concept (Monetary) As Of Credit eocc:LiabilitiesArisingFromFinancingActivities
984 101090 - Disclosure - Other Financial Assets - Summary of Other Financial Assets (Detail) Network

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985 Disclosure Of Other Financial Assets [Table] Table

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eocc:DisclosureOfOtherFinancialAssetsTable
986 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
987 Assets [member] Member ifrs-full:ClassesOfAssetsMember
988 Quoted Equity Securities [Member] Member eocc:QuotedEquitySecuritiesMember
989 Non Quoted Equity Securities [Member] Member eocc:NonQuotedEquitySecuritiesMember
990 Disclosure Of Other Financial Assets [Line Items] LineItems eocc:DisclosureOfOtherFinancialAssetsLineItems
991 Available-for-sale financial investments, current Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAvailableforsale
992 Hedging derivatives, current Concept (Monetary) As Of Debit eocc:HedgingDerivativesCurrent
993 Non- hedging derivatives, current Concept (Monetary) As Of Debit eocc:NonHedgingDerivativesCurrent
994 Financial assets held to maturity, current Concept (Monetary) As Of Debit eocc:FinancialAssetsHeldToMaturityCurrent
995 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
996 Available-for-sale financial investments, non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAvailableforsale
997 Hedging derivatives, non-current Concept (Monetary) As Of Debit eocc:HedgingDerivativesNoncurrent
998 Non- hedging derivatives, non-current Concept (Monetary) As Of Debit eocc:NonHedgingDerivativesNoncurrent
999 Financial assets held to maturity, non-current Concept (Monetary) As Of Debit eocc:FinancialAssetsHeldToMaturityNoncurrent
1000 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
1001 101100 - Disclosure - Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) Network

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1002 Disclosure Of Trade And Other Receivables [Table] Table

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eocc:DisclosureOfTradeAndOtherReceivablesTable
1003 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1004 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1005 Gross Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
1006 Disclosure Of Trade And Other Receivables [Line Items] LineItems eocc:DisclosureOfTradeAndOtherReceivablesLineItems
1007 Trade and other receivables, Current Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
1008 Trade receivables, Current Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1009 Other receivables, Current Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
1010 Trade and other receivables, Non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
1011 Trade receivables, Non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
1012 Other receivables, Non-current Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
1013 101110 - Disclosure - Trade and Other Receivables - Additional Information (Detail) Network

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1014 Disclosure Of Trade And Other Receivables [Table] Table

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eocc:DisclosureOfTradeAndOtherReceivablesTable
1015 Range [axis] Axis ifrs-full:RangeAxis
1016 Ranges [member] Member ifrs-full:RangesMember
1017 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
1018 Top of Range [Member] Member ifrs-full:TopOfRangeMember
1019 Disclosure Of Trade And Other Receivables [Line Items] LineItems eocc:DisclosureOfTradeAndOtherReceivablesLineItems
1020 Description of how management determines concentrations Concept (Text/String) For Period ifrs-full:DescriptionOfHowManagementDeterminesConcentrations
1021 Number of customers with sales representing 10% or more of revenues Concept (Integer) For Period eocc:NumberOfCustomersWithSalesRepresentingTenPercentageOrMoreOfRevenues
1022 Percentage of entity's revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
1023 101120 - Disclosure - Trade and Other Receivables - Schedule of Unimpaired Past Due Trade Receivables (Detail) Network

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1024 Disclosure Of Financial Assets That Are Either Past Due Or Impaired [Table] Table

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ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable
1025 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1026 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1027 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
1028 Maturity [axis] Axis ifrs-full:MaturityAxis
1029 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1030 Less Than Three Months [Member] Member ifrs-full:NotLaterThanThreeMonthsMember
1031 Between Three and Six Months [Member] Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanSixMonthsMember
1032 Between Six and Twelve Months [Member] Member ifrs-full:LaterThanSixMonthsAndNotLaterThanOneYearMember
1033 Disclosure of financial assets that are past due but not impaired [Line Items] LineItems eocc:DisclosureOfFinancialAssetsThatArePastDueButNotImpairedLineItems
1034 Trade Receivables Past Due but not Impaired Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1035 101130 - Disclosure - Trade and Other Receivables - Summary of Reconciliation of Changes in the Allowance for Impairment of Trade Receivables (Detail) Network

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1036 Disclosure Of Financial Assets [Table] Table

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1037 Impairment of financial assets [axis] Axis ifrs-full:ImpairmentOfFinancialAssetsAxis
1038 Entity's total for impairment of financial assets [member] Member ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1039 Trade Receivables Past Due and Impaired [Member] Member eocc:FinancialAssetsPastDueAndImpairedMember
1040 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1041 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1042 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
1043 Disclosure of financial assets [Line Items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1044 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1045 Amounts written off Concept (Monetary) For Period Debit eocc:WrittenOffAllowanceAccountForCreditLossesOfFinancialAssets
1046 Foreign currency translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1047 Increases (decreases) for the year Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInAllowanceAccountForCreditLossesOfFinancialAssets
1048 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1049 101140 - Disclosure - Balances and Transactions with Related Parties - Summary of Receivables from and Accounts Payable to Related Parties (Detail) Network

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1050 Disclosure Of Transactions Between Related Parties [Table] Table

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ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1051 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1052 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1053 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
1054 Accounts Payable [Member] Member eocc:AccountsPayablesMember
1055 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1056 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1057 Enel Distribucin Chile S.A. [Member] Member eocc:EnelDistribucinChileSAMember
1058 Enel Generacin Piura S.A. [Member] Member eocc:EnelGeneracinPiuraSAMember
1059 Empresa Electrica de Colina Ltda.[Member] Member eocc:EmpresaElectricaDeColinaLtdaMember
1060 Enel Americas S.A. [Member] Member eocc:EnelAmericasSAMember
1061 Generalima S.A. [Member] Member eocc:GeneralimaSAMember
1062 Enel Chile S A. [Member] Member eocc:EnelChileSAMember
1063 GNL Chile S.A. [Member] Member eocc:GNLChileSAMember
1064 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
1065 Servicios Informáticos e Inmobiliarios Ltda. [Member] Member eocc:ServiciosInformaticosEInmobiliariosLtdaMember
1066 Luz Andes Ltda. [Member] Member eocc:LuzAndesLtdaMember
1067 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
1068 Empresa Electrica Panguipulli S .A. [Member] Member eocc:EmpresaElectricaPanguipulliSAMember
1069 Empresa Electrica Puyehue S.A. [Member] Member eocc:EmpresaElectricaPuyehueSAMember
1070 Enel Brasil S A [Member] Member eocc:EnelBrasilSAMember
1071 PH Chucas S,A. [Member] Member eocc:PHChucasSAMember
1072 Endesa Generacion [Member] Member eocc:EndesaGeneracionMember
1073 Endesa Energia S.A. [Member] Member eocc:EndesaEnergiaSAMember
1074 Parque Eolico Talinay Oriente S.A. [Member] Member eocc:ParqueEolicoTalinayOrienteSAMember
1075 Endesa Espana S.A. [Member] Member eocc:EndesaEspanaSAMember
1076 Parque Eolico Tal Tal S.A. [Member] Member eocc:ParqueEolicoTalTalSAMember
1077 Parque Eolico Valle De Los Vientos S.A. [Member] Member eocc:AlmeydaSolarSPAMember
1078 Compania Energetica Veracruz S.A.C. [Member] Member eocc:CompaniaEnergeticaVeracruzSACMember
1079 Enel Italia Servizi SRL [Member] Member eocc:EnelItaliaServiziSRLMember
1080 Enel S.p.A [Member] Member eocc:EnelSPAMember
1081 Enel Trade S.p.A [Member] Member eocc:EnelTradeSPAMember
1082 Parque Eolico Valle De Los Vientos S A Member eocc:ParqueEolicoValleDeLosVientosSAMember
1083 Emgesa S.A. [Member] Member eocc:EmgesaSAMember
1084 Enel Generacin Peru S.A. [Member] Member eocc:EnelGeneracinPeruSAMember
1085 Enel Green Power del Sur S p A [Member] Member eocc:EnelGreenPowerDelSurSpAMember
1086 Enel Green Power Chile Ltda. [Member] Member eocc:EnelGreenPowerChileLtdaMember
1087 Enel Green Power Colombia SAS [Member] Member eocc:EnelGreenPowerColombiaSASMember
1088 Chinango S.A.C. [Member] Member eocc:ChinangoSACMember
1089 Enel Green Power Brasil [Member] Member eocc:EnelGreenPowerBrasilMember
1090 Enel Green Power Mexico [Member] Member eocc:EnelGreenPowerMexicoMember
1091 Enel Green Power Peru [Member] Member eocc:EnelGreenPowerPeruMember
1092 Enel Green Power Italia [Member] Member eocc:EnelGreenPowerItaliaMember
1093 Geotermica del Norte [Member] Member eocc:GeotermicaDelNorteMember
1094 Comercializadora de Energia del Mercosur S.A. [Member] Member eocc:ComercializadoraDeEnergiaDelMercosurSAMember
1095 Endesa Generacion S.A. [Member] Member eocc:EndesaGeneracionSAMember
1096 Endesa Generacion [Member] Member eocc:EnelIberoamericaSRLMember
1097 Enel Iberoamerica SRL [Member] Member eocc:EnelProduzioneSPAMember
1098 Transmisora Electrica De Quillota Ltda [Member] Member eocc:TransmisoraElectricaDeQuillotaLtdaMember
1099 Enel Ingegneria & Ricerca S.p.A [Member] Member eocc:EnelIngegneriaAndRicercaSPAMember
1100 Empresa De Transmision Chena S A Member eocc:EmpresaDeTransmisionChenaSAMember
1101 Enel Trading Argentina S.R.L. [Member] Member eocc:EnelTradingArgentinaSRLMember
1102 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
1103 Products and services [member] Member ifrs-full:ProductsAndServicesMember
1104 Energy Sales [Member] Member eocc:EnergySalesMember
1105 Tolls [Member] Member eocc:TollsMember
1106 Dividends [Member] Member eocc:DividendsMember
1107 Other Services [Member] Member eocc:OtherServicesMember
1108 Anticipated Gas Purchase [Member] Member eocc:AnticipatedGasPurchaseMember
1109 Loans [Member] Member eocc:LoanMember
1110 Commodity Derivatives [Member] Member eocc:CommodityDerivativesMember
1111 Gas Sale Member eocc:GasSaleMember
1112 Mercantile Current Account [Member] Member eocc:MercantileCurrentAccountMember
1113 Gas Purchase [Member] Member eocc:GasPurchaseMember
1114 Energy Purchase [Member] Member eocc:EnergyPurchaseMember
1115 Carbon Purchase Member eocc:CarbonPurchaseMember
1116 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1117 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1118 Chile [Member] Member country:CL
1119 Peru [Member] Member country:PE
1120 Brazil [Member] Member country:BR
1121 Costa Rica [Member] Member country:CR
1122 Spain [Member] Member country:ES
1123 Italy [Member] Member country:IT
1124 Colombia [Member] Member country:CO
1125 MEXICO Member country:MX
1126 Argentina [Member] Member country:AR
1127 Currencies Axis eocc:CurrenciesAxis
1128 Currency Member Member eocc:CurrencyMember
1129 Chilean Peso [Member] Member currency:CLP
1130 U.S. Dollar [Member] Member currency:USD
1131 Unidad de Fomento (funds code) Member currency:CLF
1132 Argentine Peso [Member] Member currency:ARS
1133 Chilean Peso [Member] Member currency:COP
1134 Euro [Member] Member currency:EUR
1135 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1136 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
1137 Company Concept (Text/String) For Period eocc:NameOfRelatedParties
1138 Description of the transaction Concept (Text/String) For Period ifrs-full:DescriptionOfTransactionsWithRelatedParty
1139 Term of the transaction Concept (Text/String) For Period ifrs-full:ExplanationOfTermsAndConditionsOfOutstandingBalancesForRelatedPartyTransaction
1140 Relationship Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
1141 Currency Concept (Text/String) For Period ifrs-full:DescriptionOfFunctionalCurrency
1142 Country Concept (Text/String) For Period eocc:CountryOfOperation
1143 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
1144 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1145 Non-current accounts payables to related parties Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToRelatedParties
1146 101150 - Disclosure - Balances and Transactions with Related Parties - Summary of Significant Transactions and Effect on Income or Expenses (Detail) Network

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1147 Disclosure Of Transactions Between Related Parties [Table] Table

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ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1148 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1149 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1150 Enel Distribucin Chile S.A. [Member] Member eocc:EnelDistribucinChileSAMember
1151 Empresa Electrica de Colina Ltda.[Member] Member eocc:EmpresaElectricaDeColinaLtdaMember
1152 Enel Americas S.A. [Member] Member eocc:EnelAmericasSAMember
1153 Enel Chile S A. [Member] Member eocc:EnelChileSAMember
1154 Empresa Distribuidora Sur S.A. [Member] Member eocc:EmpresaDistribuidoraSurSAMember
1155 Luz Andes Ltda. [Member] Member eocc:LuzAndesLtdaMember
1156 Compañía Distribuidora y Comercializadora de Energía S.A. [Member] Member eocc:CompaniaDistribuidoraYComercializadoraDeEnergiaSAMember
1157 Comercializadora de Energia del Mercosur S.A. [Member] Member eocc:ComercializadoraDeEnergiaDelMercosurSAMember
1158 Empresa de Distribución Eléctrica de Lima Norte S.A.A. [Member] Member eocc:EmpresaDeDistribucionElectricaDeLimaNorteSAAMember
1159 Endesa Latinoamericana S.A. [Member] Member eocc:EndesaLatinoamericanaSAMember
1160 Enel Brasil S A [Member] Member eocc:EnelBrasilSAMember
1161 Endesa Generacion S.A. [Member] Member eocc:EndesaGeneracionSAMember
1162 Enel Generacion Piura S.A. [Member] Member eocc:EnelGeneracionPiuraSAMember
1163 Enel Peru S A C Member eocc:EnelPeruSACMember
1164 Generalima S.A. [Member] Member eocc:GeneralimaSAMember
1165 Empresa de Energía de Cundinamarca S.A. [Member] Member eocc:EmpresaDeEnergiaDeCundinamarcaSAMember
1166 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
1167 Compañía de Transmisión del Mercosur S.A. [Member] Member eocc:CompaniaDeTransmisionDelMercosurSAMember
1168 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
1169 GNL Chile S.A. [Member] Member eocc:GNLChileSAMember
1170 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
1171 Products and services [member] Member ifrs-full:ProductsAndServicesMember
1172 Energy Sales [Member] Member eocc:EnergySalesMember
1173 Tolls [Member] Member eocc:TollsMember
1174 Services Provided [Member] Member eocc:ServicesProvidedMember
1175 Electricity Tolls [Member] Member eocc:ElectricityTollsMember
1176 Loans [Member] Member eocc:LoanMember
1177 Services Received Member eocc:ServicesReceivedMember
1178 Energy Purchase [Member] Member eocc:EnergyPurchaseMember
1179 Fuel Consumption [Member] Member eocc:FuelConsumptionMember
1180 Commodity Derivatives [Member] Member eocc:CommodityDerivativesMember
1181 Gas Tolls [Member] Member eocc:GasConsumptionMember
1182 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1183 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1184 Chile [Member] Member country:CL
1185 Argentina [Member] Member country:AR
1186 Colombia [Member] Member country:CO
1187 Peru [Member] Member country:PE
1188 Spain [Member] Member country:ES
1189 Brazil [Member] Member country:BR
1190 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1191 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
1192 Company Concept (Text/String) For Period eocc:NameOfRelatedParties
1193 Relationship Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
1194 Description of the transaction Concept (Text/String) For Period ifrs-full:DescriptionOfTransactionsWithRelatedParty
1195 Country Concept (Text/String) For Period eocc:CountryOfOperation
1196 Significant transactions and effects on income/expenses Concept (Monetary) For Period Credit eocc:SignificantEffectOfTransactionsOnIncomeOrExpenses
1197 101160 - Disclosure - Balances and Transactions with Related Parties - Additional Information (Detail) Network

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1198 Disclosure Of Transactions Between Related Parties [Table] Table

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ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1199 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1200 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1201 Company Board [Member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1202 Chairman [Member] Member eocc:ChairmanMember
1203 Directors Committee [Member] Member eocc:DirectorsCommitteeMember
1204 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
1205 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
1206 Monthly Fee [Member] Member eocc:MonthlyFeeMember
1207 Per Diem For Each Meeting [Member] Member eocc:PerDiemForEachMeetingMember
1208 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1209 Number of members in Board of Directors Concept (Integer) For Period eocc:NumberOfBoardOfDirectors
1210 Term of service for each director Concept (xbrli:durationItemType) For Period eocc:TermOfServiceForEachDirector
1211 Amounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
1212 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
1213 Compensation for directors Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1214 Description of the transaction Concept (Text/String) For Period ifrs-full:DescriptionOfTransactionsWithRelatedParty
1215 Guarantees granted Concept (Monetary) For Period ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
1216 101170 - Disclosure - Balances and Transactions with Related Parties - Summary of Compensation Paid to Members of the Board of Directors (Detail) Network

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1217 Disclosure Of Transactions Between Related Parties [Table] Table

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1218 Separate management entities [axis] Axis ifrs-full:SeparateManagementEntitiesAxis
1219 Separate management entities [member] Member ifrs-full:SeparateManagementEntitiesMember
1220 Giuseppe Conti [Member] Member eocc:GiuseppeContiMember
1221 Francesco Giorgianni [Member] Member eocc:FrancescoGiorgianniMember
1222 Francesco Buresti [Member] Member eocc:FrancescoBurestiMember
1223 Enrique Cibié Bluth [Member] Member eocc:EnriqueCibieBluthMember
1224 Jorge Atton Palma [Member] Member eocc:JorgeAttonPalmaMember
1225 Julio Pellegrini Vial [Member] Member eocc:JulioPellegriniVialMember
1226 Mauro Di Carlo [Member] Member eocc:MauroDiCarloMember
1227 Umberto Magrini [Member] Member eocc:UmbertoMagriniMember
1228 Fabrizio Barderi [Member] Member eocc:FabrizioBarderiMember
1229 Luca Noviello [Member] Member eocc:LucaNovielloMember
1230 Enrico Viale Member eocc:EnricoVialeMember
1231 Ignacio Mateo Montoya Member eocc:IgnacioMateoMontoyaMember
1232 Felipe Lamarca Claro Member eocc:FelipeLamarcaClaroMember
1233 Isabel Marshall Lagarrigue Member eocc:IsabelMarshallLagarrigueMember
1234 Vittorio Vagliasindi Member eocc:VittorioVagliasindiMember
1235 Francesca Gostinelli Member eocc:FrancescaGostinelliMember
1236 Susana Carey Claro Member eocc:SusanaCareyClaroMember
1237 Alfredo Arahuetes Garcia Member eocc:AlfredoArahuetesGarciaMember
1238 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1239 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1240 Enel Generacion Board [Member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1241 Subsidiaries [Member] Member ifrs-full:SubsidiariesMember
1242 Directors Committee [Member] Member eocc:DirectorsCommitteeMember
1243 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1244 Name Concept (Text/String) For Period eocc:NameOfRelatedParties
1245 Position Concept (Text/String) For Period ifrs-full:ExplanationOfRelationshipsBetweenParentsAndEntity
1246 Period in position Concept (Text/String) For Period eocc:RelatedPartyTransactionPeriodInPosition
1247 Total compensation paid to members Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1248 101180 - Disclosure - Balances and Transactions with Related Parties - Summary of Key Management Personnel (Detail) Network

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*

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1249 Disclosure Of Transactions Between Related Parties [Table] Table

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*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1250 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1251 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1252 Company Board [Member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1253 Separate management entities [axis] Axis ifrs-full:SeparateManagementEntitiesAxis
1254 Separate management entities [member] Member ifrs-full:SeparateManagementEntitiesMember
1255 Valter Moro [Member] Member eocc:ValterMoroMember
1256 Juan Alejandro Candia Narvaez [Member] Member eocc:JuanAlejandroCandiaNarvaezMember
1257 Raúl Arteaga Errazuriz [Member] Member eocc:RaulArteagaErrazurizMember
1258 Luis Alberto Vergara Adamides [Member] Member eocc:LuisAlbertoVergaraAdamidesMember
1259 Luis Ignacio Quiñones Sotomayor [Member] Member eocc:LuisIgnacioQuinonesSotomayorMember
1260 Humberto Espejo Paluz [Member] Member eocc:HumbertoEspejoPaluzMember
1261 Claudio Helfmann Soto [Member] Member eocc:ClaudioHelfmannSotoMember
1262 Bernardo Canales Fuenzalida [Member] Member eocc:BernardoCanalesFuenzalidaMember
1263 Michele Siciliano [Member] Member eocc:MicheleSicilianoMember
1264 Claudio Ordenes Tirado [Member] Member eocc:ClaudioOrdenesTiradoMember
1265 Carlo Carvallo Artigas [Member] Member eocc:CarloCarvalloArtigasMember
1266 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1267 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
1268 Name Concept (Text/String) For Period eocc:NameOfRelatedParties
1269 Position Concept (Text/String) For Period ifrs-full:ExplanationOfRelationshipsBetweenParentsAndEntity
1270 101190 - Disclosure - Balances and Transactions with Related Parties - Summary of Compensation Received by Key Management Personnel (Detail) Network

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*

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1271 Implied Table Table

*

*

implied:Table
1272 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1273 Cash compensation Concept (Monetary) For Period Debit eocc:KeyManagementPersonnelCompensationCashCompensation
1274 Short-term benefits for employees Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1275 Other long-term benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationOtherLongtermBenefits
1276 TOTAL Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1277 101200 - Disclosure - Inventories - Summary of Classes of Inventories (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesSummaryOfClassesOfInventoriesDetail
1278 Implied Table Table

*

*

implied:Table
1279 Classes Of Inventories [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
1280 Supplies for Production Concept (Monetary) As Of Debit ifrs-full:ProductionSupplies
1281 Gas Concept (Monetary) As Of Debit ifrs-full:CurrentNaturalGas
1282 Oil Concept (Monetary) As Of Debit ifrs-full:CurrentCrudeOil
1283 Coal Concept (Monetary) As Of Debit eocc:CurrentCoal
1284 Supplies for projects and spare parts Concept (Monetary) As Of Debit ifrs-full:SpareParts
1285 Total Concept (Monetary) As Of Debit ifrs-full:Inventories
1286 101210 - Disclosure - Inventories - Summary of Classes of Inventories (Parenthetical) (Detail) Network

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1287 Implied Table Table

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*

implied:Table
1288 Classes Of Inventories [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
1289 Inventories pledged as collateral to hedge any liability Concept (Monetary) As Of Debit ifrs-full:InventoriesPledgedAsSecurityForLiabilities
1290 101220 - Disclosure - Inventories - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesAdditionalInformationDetail
1291 Disclosure Of Inventories [Table] Table

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*

eocc:DisclosureOfInventoriesTable
1292 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1293 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1294 Spare Parts and Materials [Member] Member ifrs-full:NoncurrentAssetsHeldForSaleMember
1295 Disclosure Of Inventories [Line Items] LineItems eocc:DisclosureOfInventoriesLineItems
1296 Raw materials and consumables recognized as fuel expenses Concept (Monetary) For Period Debit ifrs-full:FuelExpense
1297 Other non-current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
1298 Inventories written down due to obsolescence Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
1299 101230 - Disclosure - Current Tax Receivable and Payables - Summary of Current Tax Receivable and Payable (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCurrentTaxReceivableAndPayablesSummaryOfCurrentTaxReceivableAndPayableDetail
1300 Implied Table Table

*

*

implied:Table
1301 Disclosure Of Current Tax Assets And Liabilities [Abstract] Abstract eocc:DisclosureOfCurrentTaxAssetsAndLiabilitiesAbstract
1302 Monthly provisional tax payments Concept (Monetary) As Of Debit eocc:MonthlyProvisionalTaxPayments
1303 Tax credit for absorbed profits Concept (Monetary) As Of Debit eocc:TaxCreditForAbsorbedProfits
1304 Minimum presumed income Concept (Monetary) As Of Debit eocc:MinimumPresumedIncome
1305 Other Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
1306 Total Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
1307 Income tax Concept (Monetary) As Of Credit eocc:CurrentIncomeTaxLiabilitiesCurrent
1308 Current tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
1309 101240 - Disclosure - Investments Accounted for Using the Equity Method - Schedule of Changes in Investments Accounted for with Equity Method (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodScheduleOfChangesInInvestmentsAccountedForWithEquityMethodDetail
1310 Disclosure Of Investments Accounted For Using Equity Method [Table] Table

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*

eocc:DisclosureOfInvestmentsAccountedForUsingEquityMethodTable
1311 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1312 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1313 GNL Chile S.A. [Member] Member eocc:GNLChileSAMember
1314 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
1315 Transmisora Electrica De Quillota Ltda [Member] Member eocc:TransmisoraElectricaDeQuillotaLtdaMember
1316 Enel Argentina (formerly named Endesa Argentina S.A.) [Member] Member eocc:EnelArgentinaSAMember
1317 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
1318 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
1319 Southern Cone Power Argentina S.A. [Member] Member eocc:SouthernConePowerArgentinaSAMember
1320 Disclosure Of Investments Accounted For Using Equity Method [Line Items] LineItems eocc:DisclosureOfInvestmentsAccountedForUsingEquityMethodLineItems
1321 Changes in Investments in Associates Concept (Text/String) For Period eocc:NameOfAssociatesAndJointVentures
1322 Relationship Concept (Text/String) For Period eocc:DescriptionOfNatureOfEntityRelationshipWithAssociateAndJointVenture
1323 Country Concept (Text/String) For Period eocc:CountryOfOperation
1324 Currency Concept (Text/String) For Period ifrs-full:DescriptionOfFunctionalCurrency
1325 Ownership Interest % Concept (Percent) For Period eocc:ProportionOfOwnershipInterestInAssociateAndJointVenture
1326 Investments accounted for using Equity Method, Beginning balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1327 Additions Concept (Monetary) For Period Debit eocc:InvestmentAccountedForUsingEquityMethodsAdditions
1328 Share of Profit (Loss) Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1329 Dividends Declared Concept (Monetary) For Period Credit eocc:DividendsDeclared
1330 Foreign Currency Translation Concept (Monetary) For Period Debit eocc:ForeignCurrencyTranslationAdjustment
1331 Other Comprehensive Income Concept (Monetary) For Period Credit ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1332 Other Increase (Decrease) Concept (Monetary) For Period Debit eocc:InvestmentAccountedForUsingEquityMethodsIncreaseDecrease
1333 Investments accounted for using Equity Method, Before Adjustment Concept (Monetary) For Period Debit eocc:InvestmentAccountedForUsingEquityMethodsBeforeAdjustment
1334 Transferred to assets held for distribution to owners Concept (Monetary) For Period Debit eocc:TransferredToAssetsHeldForDistributionToOwners
1335 Investments accounted for using Equity Method, Ending balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1336 101250 - Disclosure - Investments Accounted For Using the Equity Method - Additional Information (Detail) Network

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1337 Disclosure Of Significant Investments In Associates And Joint Ventures [Table] Table

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*

eocc:DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesTable
1338 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1339 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1340 Joint Ventures [Member] Member ifrs-full:JointVenturesMember
1341 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1342 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1343 Associates [Member] Member ifrs-full:AssociatesMember
1344 Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items] LineItems eocc:DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesLineItems
1345 Ownership interest transferred Concept (Percent) For Period eocc:AcquisitionPercentageOfSubsidiaries
1346 Consideration transferred Concept (Monetary) As Of Credit eocc:FairValueAtDisposalDate
1347 Commitments and contingencies Concept (Monetary) As Of Credit eocc:CommitmentsAndContingencies1
1348 101260 - Disclosure - Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Investments in Associates (Detail) Network

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1349 Disclosure Of Significant Investments In Associates [Table] Table

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*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1350 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1351 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1352 GNL Chile S.A. [Member] Member eocc:GNLChileSAMember
1353 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
1354 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
1355 Disclosure Of Significant Investments In Associates [Line Items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1356 Ownership Interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1357 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1358 Total Non Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1359 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1360 Non-current Liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1361 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
1362 Expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
1363 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1364 Other Comprehensive Income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
1365 Comprehensive Income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
1366 101270 - Disclosure - Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Main Joint Ventures (Detail) Network

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1367 Disclosure Of Joint Ventures [Table] Table

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ifrs-full:DisclosureOfJointVenturesTable
1368 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1369 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1370 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
1371 Transmisora Electrica De Quillota Ltda [Member] Member eocc:TransmisoraElectricaDeQuillotaLtdaMember
1372 Disclosure Of Joint Ventures [Line Items] LineItems ifrs-full:DisclosureOfJointVenturesLineItems
1373 Investments in Joint Ventures Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
1374 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1375 Total Non Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1376 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1377 Non-current Liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1378 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1379 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
1380 Depreciation and amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
1381 Other fixed operating expenses Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
1382 Interest income Concept (Monetary) For Period Credit ifrs-full:InvestmentIncome
1383 Obligation to pay taxes Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1384 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1385 Comprehensive Income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
1386 101280 - Disclosure - Intangible Assets Other Than Goodwill - Summary of Intangible Assets (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillSummaryOfIntangibleAssetsDetail
1387 Disclosure Of Intangible Assets [Table] Table

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*

ifrs-full:DisclosureOfIntangibleAssetsTable
1388 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1389 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1390 Easements and Water Rights [Member] Member eocc:EasementsAndWaterRightsMember
1391 Computer Software [Member] Member ifrs-full:ComputerSoftwareMember
1392 Other Identifiable Intangible Assets [Member] Member ifrs-full:OtherIntangibleAssetsMember
1393 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1394 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1395 Gross Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
1396 Accumulated Amoritzation and Impairment [Member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1397 Disclosure of detailed information about intangible assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1398 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1399 Intangible Assets, Amortization and Impairment Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1400 101290 - Disclosure - Intangible Assets Other Than Goodwill - Summary of Reconciliations of the Carrying Amounts of Intangible Assets (Detail) Network

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1401 Disclosure Of Reconciliation Of Changes In Intangible Assets And Goodwill [Table] Table

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*

ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1402 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1403 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1404 Easements and Water Rights [Member] Member eocc:EasementsAndWaterRightsMember
1405 Computer Software [Member] Member ifrs-full:ComputerSoftwareMember
1406 Other Identifiable Intangible Assets [Member] Member ifrs-full:OtherIntangibleAssetsMember
1407 Development Costs [Member] Member ifrs-full:IntangibleAssetsUnderDevelopmentMember
1408 Patents Registered Trademarks and Other Rights [Member] Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
1409 Disclosure Of Reconciliation Of Changes In Intangible Assets And Goodwill [Line Items] LineItems ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1410 Beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1411 Increases other than those from business combinations Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1412 Increase (decrease) from net foreign exchange differences, net Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
1413 Intangible Assets, Amortization and Impairment Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1414 Increases (decreases) from transfers and other changes Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsOtherThanGoodwill
1415 Increases (decreases) from transfers Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill
1416 Increases (decreases) from other changes Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherChangesIntangibleAssetsOtherThanGoodwill
1417 Disposals and withdrawals from service Concept (Monetary) For Period Credit ifrs-full:DisposalsAndRetirementsIntangibleAssetsOtherThanGoodwill
1418 Withdrawals from service Concept (Monetary) For Period Credit ifrs-full:RetirementsIntangibleAssetsOtherThanGoodwill
1419 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
1420 Classified as held for distribution to owners Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryIntangibleAssetsOtherThanGoodwill
1421 Total changes in identifiable intangible assets Concept (Monetary) For Period Debit ifrs-full:ChangesInIntangibleAssetsOtherThanGoodwill
1422 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1423 101300 - Disclosure - Goodwill - Summary of Goodwill by the Cash-Generating Unit or Group of Cash-Generating Units (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwillSummaryOfGoodwillByCashGeneratingUnitOrGroupOfCashGeneratingUnitsDetail
1424 Disclosure Of Information For Individual Asset Or Cashgenerating Unit With Significant Amount Of Goodwill Or Intangible Assets With Indefinite Useful Lives [Table] Table

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*

ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable
1425 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1426 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1427 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
1428 Inversiones GasAtacama Holding Ltda. [Member] Member eocc:InversionesGasAtacamaHoldingLtdaMember
1429 Compania Electrica Tarapaca S.A. [Member] Member eocc:CompaniaElectricaTarapacaSAMember
1430 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1431 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1432 Enel Generacion Chile [Member] Member eocc:GeneracionChileMember
1433 Disclosure Of Information For Individual Asset Or Cashgenerating Unit With Significant Amount Of Goodwill Or Intangible Assets With Indefinite Useful Lives [Line Items] LineItems ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
1434 Opening balance Concept (Monetary) As Of Debit ifrs-full:Goodwill
1435 Transfer on mergers Concept (Monetary) For Period Debit eocc:IncreaseDecreaseThroughTransferOnMergersGoodwill
1436 Foreign Currency Exchange Differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1437 Transferred to assets held for distribution to owners Concept (Monetary) For Period Credit eocc:DecreaseThroughTransfersToAssetsHeldForDistributionToOwnersGoodwill
1438 Closing balance Concept (Monetary) As Of Debit ifrs-full:Goodwill
1439 101310 - Disclosure - Goodwill - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwillAdditionalInformationDetail
1440 Disclosure Of Goodwill [Table] Table

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*

eocc:DisclosureOfGoodwillTable
1441 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
1442 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
1443 Empresa Electrica Pangue S.A. [Member] Member eocc:EmpresaElectricaPangueMember
1444 Inversiones Lo Venecia Ltda [Member] Member eocc:InversionesLoVeneciaLtdaMember
1445 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
1446 Disclosure Of Information About Goodwill [Line Items] LineItems eocc:DisclosureOfInformationAboutGoodwillLineItems
1447 Percentage of acquisition through put option Concept (Percent) For Period eocc:PercentageOfAcquisitionThroughPutOption
1448 Ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1449 101320 - Disclosure - Property, Plant and Equipment, Net - Summary of Property Plant and Equipment (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfPropertyPlantAndEquipmentDetail
1450 Disclosure Of Property Plant And Equipment [Table] Table

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ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1451 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1452 Property, Plant and Equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
1453 Construction in Progress [Member] Member ifrs-full:ConstructionInProgressMember
1454 Land [Member] Member ifrs-full:LandMember
1455 Buildings [Member] Member ifrs-full:BuildingsMember
1456 Plant and Equipment [Member] Member eocc:PlantAndEquipmentMember
1457 Fixtures and Fittings [Member] Member ifrs-full:FixturesAndFittingsMember
1458 Finance Leases [Member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
1459 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1460 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1461 Gross Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
1462 Accumulated Amoritzation and Impairment [Member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1463 Disclosure of Detailed Information About Property, Plant and Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1464 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1465 101330 - Disclosure - Property, Plant and Equipment, Net - Summary of Changes in Property Plant and Equipment, Net (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfChangesInPropertyPlantAndEquipmentNetDetail
1466 Disclosure Of Property Plant And Equipment [Table] Table

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*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1467 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1468 Property, Plant and Equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
1469 Construction in Progress [Member] Member ifrs-full:ConstructionInProgressMember
1470 Land [Member] Member ifrs-full:LandMember
1471 Buildings, Net [Member] Member ifrs-full:BuildingsMember
1472 Plant and Equipment, Net [Member] Member eocc:PlantAndEquipmentMember
1473 Fixtures and Fittings, Net [Member] Member ifrs-full:FixturesAndFittingsMember
1474 Other Property, Plant and Equipment Under Financial Lease, Net [Member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
1475 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1476 Beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1477 Changes: Abstract ifrs-full:ChangesInPropertyPlantAndEquipmentAbstract
1478 Increases other than those from business combinations Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1479 Increase (decrease) from net foreign exchange differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1480 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1481 (Impairment)/Reversal of impairment losses recognized in profit or loss Concept (Monetary) For Period Debit eocc:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1482 Increases (decreases) from transfers and other changes Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
1483 Increases (decreases) from transfers from construction in process Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment
1484 Increases (decreases) from transfers Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
1485 Disposals and withdrawals from service Concept (Monetary) For Period Credit ifrs-full:DisposalsAndRetirementsPropertyPlantAndEquipment
1486 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
1487 Write-offs Concept (Monetary) For Period Credit ifrs-full:RetirementsPropertyPlantAndEquipment
1488 Other increases/decreases Concept (Monetary) For Period Debit eocc:OtherIncreaseDecreaseInPropertyPlantAndEquipment
1489 Total changes Concept (Monetary) For Period Debit ifrs-full:ChangesInPropertyPlantAndEquipment
1490 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1491 101340 - Disclosure - Property, Plant and Equipment, Net - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetAdditionalInformationDetail
1492 Disclosure Of Property Plant And Equipment [Table] Table

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*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1493 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1494 Property, Plant and Equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
1495 Central Hidroelectrica Los Condores Plant [Member] Member eocc:CentralHidroelectricaLosCondoresPlantMember
1496 Plant and Equipment related to Punta Alcalde Project [Member] Member eocc:PlantAndEquipmentRelatedToPuntaAlcaldeProjectMember
1497 Range [axis] Axis ifrs-full:RangeAxis
1498 Ranges [member] Member ifrs-full:RangesMember
1499 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
1500 Top of Range [Member] Member ifrs-full:TopOfRangeMember
1501 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
1502 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
1503 Continuing Operations [Member] Member ifrs-full:ContinuingOperationsMember
1504 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1505 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1506 Compania Electrica Tarapaca S.A. [Member] Member eocc:CompaniaElectricaTarapacaSAMember
1507 Neltume Project [Member] Member eocc:NeltumeProjectMember
1508 Choshuenco Projects [Member] Member eocc:ChoshuencoProjectsMember
1509 Investment Issuer Axis invest:InvestmentIssuerAxis
1510 Investment Issuer Member invest:InvestmentIssuerDomain
1511 Tames 2 and Totoralillo Projects [Member] Member eocc:TamesTwoAndTotoralilloProjectsMember
1512 Disclosure of Detailed Information About Property, Plant and Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1513 Installed energy capacity Concept (num:powerItemType) For Period eocc:InstalledEnergyCapacity
1514 Increases other than those from business combinations Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1515 Capitalized borrowing costs Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
1516 Weighted average capitalization rate Concept (Percent) For Period ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1517 Capitalized personnel expenses Concept (Monetary) For Period Debit eocc:CapitalizedPersonnelExpenses
1518 Capitalized financial leases Concept (Monetary) For Period Debit eocc:CapitalizedFinancialLeases
1519 Lease agreement period Concept (xbrli:durationItemType) For Period eocc:FinanceLeasePeriod
1520 Annual interest rate Concept (Percent) As Of eocc:PercentageOfLeaseBearingInterestRate
1521 Operating lease contracts for material assets Concept (Monetary) For Period Credit eocc:AdjustmentsConsumptionOfMaterialsAndRetirementOfPropertyPlantAndEquipmentAndIntangibleAssets
1522 Contractual commitments for acquisition of property, plant and equipment Concept (Monetary) As Of Credit ifrs-full:ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment
1523 Property, plant and equipment, pledged as security Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
1524 Insurance Policies Amount For All Risks Concept (Monetary) As Of Debit eocc:InsurancePoliciesAmountForAllRisks
1525 Civil Liability Insurance Amount Concept (Monetary) As Of Debit eocc:CivilLiabilityInsuranceAmount
1526 Allowance For Impairment Losses Concept (Monetary) As Of Debit eocc:AllowanceForImpairmentLosses
1527 Impairment loss recognized Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
1528 Impairment Test Period Concept (xbrli:durationItemType) For Period eocc:ImpairmentTestPeriod
1529 Impairment loss recognized Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
1530 Environmental impact assessment modification period Concept (xbrli:durationItemType) For Period eocc:EnvironmentalImpactAssessmentModificationPeriod
1531 Decrease in net book value of assets Concept (Monetary) For Period Debit eocc:IncreaseDecreaseInNetBookValueOfAssets
1532 Impairment loss recognized Concept (Monetary) For Period Debit eocc:WriteOffOfPropertyPlantAndEquipment
1533 Impairment loss recognized Concept (Monetary) For Period Debit eocc:WriteOffOfIntangibleAssetsOtherThanGoodwill
1534 Percentage of impairment related cost Concept (Percent) As Of eocc:ImpairmentChargePercentage
1535 Number of thermal project Concept (Integer) For Period eocc:NumberOfThermalProject
1536 Account payable from penalties Concept (Monetary) As Of Credit eocc:AccountPayableFromPenalties
1537 101350 - Disclosure - Property, Plant and Equipment, Net - Schedule of Future Lease Payments Finance Leases (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetScheduleOfFutureLeasePaymentsFinanceLeasesDetail
1538 Disclosure Of Future Minimum Lease Payments [Table] Table

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*

eocc:DisclosureOfFutureMinimumLeasePaymentsTable
1539 Maturity [axis] Axis ifrs-full:MaturityAxis
1540 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1541 Less than one year [Member] Member ifrs-full:NotLaterThanOneYearMember
1542 From One to Five Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1543 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
1544 Disclosure Of Future Minimum Lease Payments [Line Items] LineItems eocc:DisclosureOfFutureMinimumLeasePaymentsLineItems
1545 Gross Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
1546 Unearned Interest Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
1547 Present Value Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1548 101360 - Disclosure - Property, Plant and Equipment, Net - Schedule of Total Future Lease Payments (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetScheduleOfTotalFutureLeasePaymentsDetail
1549 Disclosure Of Future Minimum Lease Payments [Table] Table

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*

eocc:DisclosureOfFutureMinimumLeasePaymentsTable
1550 Maturity [axis] Axis ifrs-full:MaturityAxis
1551 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1552 Less than one year [Member] Member ifrs-full:NotLaterThanOneYearMember
1553 From One to Five Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1554 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
1555 Disclosure Of Future Minimum Lease Payments [Line Items] LineItems eocc:DisclosureOfFutureMinimumLeasePaymentsLineItems
1556 Future lease payments Concept (Monetary) As Of Credit eocc:FutureMinimumLeasePayments
1557 101370 - Disclosure - Deferred Taxes - Summary of Deferred Income Tax Assets and Liabilities (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesSummaryOfDeferredIncomeTaxAssetsAndLiabilitiesDetail
1558 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Table] Table

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*

ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1559 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1560 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1561 Depreciation Member eocc:TaxRelatingToDepreciationMember
1562 Amortization Member eocc:TaxRelatingToAmortizationMember
1563 Accumulations (or accruals) Member eocc:TaxRelatingToAccumulationsMember
1564 Provisions Member eocc:TaxRelatingToProvisionsMember
1565 Foreign currency contracts Member eocc:TaxRelatingToForeignCurrencyContractsMember
1566 Post-employement benefits obligations Member eocc:TaxRelatingToPostEmploymentBenefitObligationsMember
1567 Revaluations of financial instruments Member eocc:TaxRelatingToRevaluationsOfFinancialInstrumentsMember
1568 Tax loss Member eocc:TaxLossCarryforwardMember
1569 Assets classified as held to distribute to owners Member eocc:TaxRelatingToAssetsClassifiedAsHeldToDistributeToOwnersMember
1570 Other Member eocc:OtherTaxesMember
1571 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1572 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1573 Deferred Tax Asset Member eocc:DeferredTaxAssetMember
1574 Classes of liabilities [axis] Axis ifrs-full:ClassesOfLiabilitiesAxis
1575 Liabilities [member] Member ifrs-full:LiabilitiesMember
1576 Deferred Tax Liabilities Member eocc:DeferredTaxLiabilitiesMember
1577 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1578 Beginning balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1579 Increase (decrease) in profit or loss Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1580 Increase (decrease) in other comprehensive income Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1581 Increase (decrease) in equity Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInDeferredTaxLiabilityAsset
1582 Foreign currency translation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
1583 Classified as assets held for sale Concept (Monetary) For Period Debit eocc:IncreaseDecreaseClassifiedAsAssetsHeldForSale
1584 Other increases (decreases) Concept (Monetary) For Period Credit eocc:OtherIncreaseDecreaseInDeferredTaxLiabilityAsset
1585 Ending balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1586 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1587 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1588 Offsetting of deferred tax assets/(liabilities) Concept (Monetary) As Of Credit eocc:OffsettingOfDeferredTaxLiabilityAsset
1589 Deferred tax assets/(liabilities) after offsetting Concept (Monetary) As Of Credit eocc:DeferredTaxLiabilityAssetAfterOffsetting
1590 101380 - Disclosure - Deferred Taxes - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesAdditionalInformationDetail
1591 Disclosure Of Income Taxes [Table] Table

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*

eocc:DisclosureOfIncomeTaxesTable
1592 Maturity [axis] Axis ifrs-full:MaturityAxis
1593 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1594 2017 [Member] Member eocc:TwoThousandSeventeenMember
1595 2018 [Member] Member eocc:TwoThousandEighteenMember
1596 Disclosure of income taxes [line items] LineItems eocc:DisclosureOfIncomeTaxesLineItems
1597 Unrecognized deferred tax assets tax loss carryforwards Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1598 Temporary differences associated with investments in subsidiaries and joint ventures Concept (Monetary) As Of ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
1599 Deferred tax asset not recognized for deductible temporary differences Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1600 Applicable tax rate under integrated system Concept (Percent) For Period eocc:ApplicableTaxRateUnderAttributedIncomeSystem
1601 Applicable tax rate under integrated system Concept (Percent) For Period eocc:ApplicableTaxRateUnderPartiallyIntegratedSystem
1602 101390 - Disclosure - Deferred Taxes - Effects of Deferred Tax on Components of Other Comprehensive Income (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesEffectsOfDeferredTaxOnComponentsOfOtherComprehensiveIncomeDetail
1603 Disclosure Of Income Taxes [Table] Table

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*

eocc:DisclosureOfIncomeTaxesTable
1604 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1605 Past due status [member] Member ifrs-full:PastDueStatusMember
1606 Amount Before Income Tax [Member] Member eocc:AmountBeforeIncomeTaxMember
1607 Income Tax Expense (Benefit) [Member] Member eocc:IncomeTaxExpenseBenefitMember
1608 Amount After Income Tax [Member] Member eocc:AmountAfterIncomeTaxMember
1609 Disclosure of income taxes [line items] LineItems eocc:DisclosureOfIncomeTaxesLineItems
1610 Available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
1611 Cash flow hedge Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
1612 Foreign currency translation Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome
1613 Investments accounted for using the equity method Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome
1614 Actuarial income on defined-benefit pension plans Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
1615 Increase (decrease) in other comprehensive income Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1616 101400 - Disclosure - Deferred Taxes - Summary of Reconciliation of Deferred Tax Movements Between Balance Sheet and Comprehensive Income (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesSummaryOfReconciliationOfDeferredTaxMovementsBetweenBalanceSheetAndComprehensiveIncomeDetail
1617 Implied Table Table

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*

implied:Table
1618 Income Tax Relating To Components Of Other Comprehensive Income [Abstract] Abstract ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeAbstract
1619 Increase (decrease) of the deferred taxes related to continuing operations Concept (Monetary) For Period Debit eocc:IncomeTaxReconciliationOfDeferredTaxOfBalanceSheetAndComprehensiveIncomeFromContinuingOperations
1620 Deferred taxes on hedge movements (revenue and derivatives hedge) Concept (Monetary) For Period Debit eocc:IncomeTaxReconciliationOfDeferredTaxOfBalanceSheetAndComprehensiveIncomeOnHedgeMovements
1621 Increase (decrease) of the deferred taxes related to discontinuing operations Concept (Monetary) For Period Debit eocc:IncomeTaxReconciliationOfDeferredTaxOfBalanceSheetAndComprehensiveIncomeFromDiscontinuingOperations
1622 Total Concept (Monetary) For Period Debit eocc:IncomeTaxRelatingToComponentsOfBalanceSheetAndComprehensiveIncome
1623 101410 - Disclosure - Other Financial Liabilities - Schedule of Balances of Other Financial Liabilities (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesScheduleOfBalancesOfOtherFinancialLiabilitiesDetail
1624 Disclosure Of Financial Liabilities [Table] Table

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ifrs-full:DisclosureOfFinancialLiabilitiesTable
1625 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1626 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1627 Interest-Bearing Borrowings [Member] Member eocc:InterestBearingBorrowingsMember
1628 Hedging Derivatives [Member] Member eocc:HedgingDerivativesMember
1629 Non-Hedging Derivatives [Member] Member eocc:NonHedgingDerivativesMember
1630 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1631 Other financial liabilities, Current Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
1632 Other financial liabilities, Non-current Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
1633 101420 - Disclosure - Other Financial Liabilities - Schedule of Interest-bearing Borrowings (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesScheduleOfInterestBearingBorrowingsDetail
1634 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1635 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1636 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1637 Bank Loans [Member] Member eocc:BankLoansMember
1638 Unsecured Liabilities [Member] Member eocc:UnsecuredObligationsMember
1639 Financial Leases [Member] Member eocc:FinancialLeasesMember
1640 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1641 Current Concept (Monetary) As Of Credit eocc:CurrentInterestBearingBorrowings
1642 Non-current Concept (Monetary) As Of Credit eocc:NoncurrentInterestBearingBorrowings
1643 101430 - Disclosure - Other Financial Liabilities - Summary of Bank Loans by Currency Maturity (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfBankLoansByCurrencyMaturityDetail
1644 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1645 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1646 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1647 Chile [Member] Member country:CL
1648 Maturity [axis] Axis ifrs-full:MaturityAxis
1649 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1650 One to three months [Member] Member ifrs-full:LaterThanOneMonthAndNotLaterThanThreeMonthsMember
1651 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1652 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
1653 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
1654 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
1655 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredBankLoansReceivedCurrent
1656 101440 - Disclosure - Other Financial Liabilities - Summary of Identification of Bank Borrowings by Company (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfIdentificationOfBankBorrowingsByCompanyDetail
1657 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1658 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1659 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1660 Banco De Credito E Inversiones [Member] Member eocc:BancoDeCreditoEInversionesMember
1661 Banco Santander [Member] Member eocc:BancoSantanderMember
1662 Maturity [axis] Axis ifrs-full:MaturityAxis
1663 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1664 Less than 90 Days [Member] Member eocc:NotLaterThanNinetyDaysMember
1665 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1666 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1667 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
1668 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1669 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1670 Chile [Member] Member country:CL
1671 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1672 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
1673 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
1674 Amortization Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1675 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredBankLoansReceivedCurrent
1676 101450 - Disclosure - Other Financial Liabilities - Summary of Unsecured Liabilities by Currency and Maturity (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfUnsecuredLiabilitiesByCurrencyAndMaturityDetail
1677 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1678 Maturity [axis] Axis ifrs-full:MaturityAxis
1679 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1680 One to Three Months [Member] Member eocc:BetweenOneAndThreeMonthMember
1681 Three to Twelve Months [Member] Member eocc:ThreeToTwelveMonthsMember
1682 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1683 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1684 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1685 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1686 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
1687 Currencies Axis eocc:CurrenciesAxis
1688 Currency Member Member eocc:CurrencyMember
1689 U.S. Dollar [Member] Member currency:USD
1690 Unidad de Fomento (funds code) Member currency:CLF
1691 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1692 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1693 Chile [Member] Member country:CL
1694 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1695 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
1696 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
1697 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
1698 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredCurrentLiabilities
1699 Non-current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredNonCurrentLiabilities
1700 101460 - Disclosure - Other Financial Liabilities - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesAdditionalInformationDetail
1701 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1702 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1703 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1704 Level 2 [Member] Member ifrs-full:Level2OfFairValueHierarchyMember
1705 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1706 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1707 Cash Flow Hedge [Member] Member ifrs-full:CashFlowHedgesMember
1708 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1709 Secured liabilities Concept (Monetary) As Of Credit eocc:SecuredLiabilities
1710 Fair value of current and non-current unsecured liabilities Concept (Monetary) As Of Credit eocc:FinancialLiabilitiesUnsecuredAtFairValue
1711 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1712 Undrawn line of credits Concept (Monetary) As Of Credit eocc:UndrawnLineOfCredits
1713 101470 - Disclosure - Other Financial Liabilities - Summary of Secured and Unsecured Liabilities by Company (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfSecuredAndUnsecuredLiabilitiesByCompanyDetail
1714 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1715 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1716 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1717 BNY Mellon S-1 [Member] Member eocc:BNYMellonS1Member
1718 BNY Mellon S-2 [Member] Member eocc:BNYMellonS2Member
1719 BNY Mellon S-3 [Member] Member eocc:BNYMellonS3Member
1720 BNY Mellon 24296 [Member] Member eocc:BnyMellonUnica24296Member
1721 Banco Santander 317-H [Member] Member eocc:BancoSantander317HMember
1722 Banco Santander 522-M [Member] Member eocc:BancoSantander522MMember
1723 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1724 Past due status [member] Member ifrs-full:PastDueStatusMember
1725 Less than 90 Days [Member] Member eocc:NotLaterThanNinetyDaysMember
1726 More than 90 Days [Member] Member eocc:MoreThanNinetyDaysMember
1727 Currencies Axis eocc:CurrenciesAxis
1728 Currency Member Member eocc:CurrencyMember
1729 U.S. Dollar [Member] Member currency:USD
1730 Unidades de Fomento [Member] Member currency:CLF
1731 Maturity [axis] Axis ifrs-full:MaturityAxis
1732 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1733 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1734 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1735 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1736 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1737 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
1738 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1739 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1740 Chile [Member] Member country:CL
1741 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1742 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1743 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
1744 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1745 Taxpayer ID Number Concept (Text/String) For Period eocc:TaxpayerIdentificationNumberOne
1746 Taxpayer ID Number Concept (Text/String) For Period eocc:TaxpayerIdentificationNumberForCompany
1747 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
1748 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
1749 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
1750 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredCurrentLiabilities
1751 Non-current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredNonCurrentLiabilities
1752 101480 - Disclosure - Other Financial Liabilities - Summary of Detail of Finance Lease Obligations (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfDetailOfFinanceLeaseObligationsDetail
1753 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1754 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1755 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1756 Nominal Interest Rate 6.50% [Member] Member eocc:SixPointFiveZeroNominalInterestRateMember
1757 Legal Entity Axis dei:LegalEntityAxis
1758 Entity Member dei:EntityDomain
1759 Enel Generacion Chile S.A. [Member] Member eocc:EnelGeneracionChileSAMember
1760 Maturity [axis] Axis ifrs-full:MaturityAxis
1761 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1762 Less than three months [Member] Member ifrs-full:NotLaterThanThreeMonthsMember
1763 More than three months [Member] Member ifrs-full:LaterThanThreeMonthsMember
1764 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1765 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1766 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1767 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1768 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
1769 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1770 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1771 Chile [Member] Member country:CL
1772 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1773 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1774 Transelec S.A [Member] Member eocc:TranselecSAMember
1775 Currencies Axis eocc:CurrenciesAxis
1776 Currency Member Member eocc:CurrencyMember
1777 U.S. Dollar [Member] Member currency:USD
1778 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1779 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
1780 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
1781 Current finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
1782 Non current finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
1783 101490 - Disclosure - Other Financial Liabilities - Summary of Changes in Reserve for Cash Flow Hedges (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfChangesInReserveForCashFlowHedgesDetail
1784 Disclosure Of Other Financial Liabilities [Table] Table

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*

eocc:DisclosureOfOtherFinancialLiabilitiesTable
1785 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1786 Equity [member] Member ifrs-full:EquityMember
1787 Reserve for Cash Flow Hedges [Member] Member ifrs-full:ReserveOfCashFlowHedgesMember
1788 Disclosure Of Other Financial Liabilities [Line Items] LineItems eocc:DisclosureOfOtherFinancialLiabilitiesLineItems
1789 Balance in hedging reserves (hedging income) at beginning of year Concept (Monetary) As Of Credit ifrs-full:ReserveOfCashFlowHedges
1790 Foreign currency exchange differences recorded in net equity Concept (Monetary) For Period Credit eocc:ForeignCurrencyExchangeDifferencesRecordedInEquityNet
1791 Recognition of foreign currency exchange differences in profit (loss) Concept (Monetary) For Period Credit eocc:RecognitionOfForeignCurrencyExchangeDifferencesInProfitLoss
1792 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
1793 Classified as assets held for distribution to owners Concept (Monetary) For Period Credit eocc:ClassifiedAsAssetsHeldForDistributionToOwners
1794 Balance in hedging reserves (hedging income) at year end Concept (Monetary) As Of Credit ifrs-full:ReserveOfCashFlowHedges
1795 101500 - Disclosure - Risk Management Policy - Schedule of Financial Debt Structure Detailed by Interest Rates Net of Hedging Derivative Instruments (Detail) Network

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1796 Disclosure Of Risk Management Strategy Related To Hedge Accounting [Table] Table

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ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable
1797 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1798 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1799 Fixed Interest Rate [Member] Member ifrs-full:FixedInterestRateMember
1800 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1801 Risks [member] Member ifrs-full:TypesOfRisksMember
1802 Interest Rate Risk [Member] Member ifrs-full:InterestRateRiskMember
1803 Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items] LineItems ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems
1804 Fixed interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1805 101510 - Disclosure - Risk Management Policy - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicyAdditionalInformationDetail
1806 Disclosure Of Financial Instruments And Financial Risk Management [Table] Table

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*

eocc:DisclosureOfFinancialInstrumentsAndFinancialRiskManagementTable
1807 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1808 Risks [member] Member ifrs-full:TypesOfRisksMember
1809 Commodity Price Risk [Member] Member ifrs-full:CommodityPriceRiskMember
1810 Liquidity Risk [Member] Member ifrs-full:LiquidityRiskMember
1811 Market Value Risk [Member] Member eocc:MarketValueRiskMember
1812 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1813 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1814 Swap Hedges [Member] Member eocc:SwapHedgesMember
1815 Hedged items [axis] Axis ifrs-full:HedgedItemsAxis
1816 Hedged items [member] Member ifrs-full:HedgedItemsMember
1817 Brent Oil [Member] Member eocc:BrentOilMember
1818 Henry Hub Gas [Member] Member eocc:HenryHubGasMember
1819 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1820 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1821 Lines of Credit [Member] Member eocc:LinesOfCreditMember
1822 Disclosure Of Financial Risk Management [Line Items] LineItems eocc:DisclosureOfFinancialRiskManagementLineItems
1823 Future barrels on Brent Concept (Decimal) For Period eocc:FutureBarrelsOnBrent
1824 Quantity of gas Concept (Decimal) For Period eocc:QuantityOfGas
1825 Cash and cash equivalent Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1826 Available lines of long-term credit Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1827 VaR at confidence level, percentage Concept (Percent) For Period eocc:PercentageOfValueAtRiskConfidenceLevel
1828 Period for risk analysis Concept (xbrli:durationItemType) For Period eocc:PeriodForDeterminingRiskAnalysis
1829 Percentage of potential variations in fair value Concept (Percent) For Period eocc:PercentageOfFairValueVariationsValueAtRisk
1830 VaR amount Concept (Monetary) As Of ifrs-full:ValueAtRisk
1831 101520 - Disclosure - Financial Instruments - Summary of Financial Assets Classified by Type and Category (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialAssetsClassifiedByTypeAndCategoryDetail
1832 Disclosure Of Financial Assets [Table] Table

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*

ifrs-full:DisclosureOfFinancialAssetsTable
1833 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1834 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1835 Financial Assets Held for Trading [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember
1836 Held-to-maturity Investments [Member] Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1837 Loans and Receivables [Member] Member ifrs-full:LoansAndReceivablesCategoryMember
1838 Available-for-sale Financial Assets [Member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1839 Derivatives Designated as Hedges [Member] Member eocc:DerivativesDesignatedAsHedgesMember
1840 Disclosure of financial assets [Line Items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1841 Non- hedging derivatives, current Concept (Monetary) As Of Debit eocc:NonHedgingDerivativesCurrent
1842 Hedging derivatives, current Concept (Monetary) As Of Debit eocc:HedgingDerivativesCurrent
1843 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
1844 Total current Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1845 Equity instruments Concept (Monetary) As Of Debit eocc:NoncurrentEquityFinancialAssets
1846 Hedging derivatives, non-current Concept (Monetary) As Of Debit eocc:HedgingDerivativesNoncurrent
1847 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
1848 Total non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1849 Total Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1850 101530 - Disclosure - Financial Instruments - Summary of Financial Liabilities Classified by Type and Category (Detail) Network

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1851 Disclosure Of Financial Liabilities [Table] Table

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ifrs-full:DisclosureOfFinancialLiabilitiesTable
1852 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1853 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
1854 Financial Liabilities Held for Trading [Member] Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossThatMeetDefinitionOfHeldForTradingCategoryMember
1855 Loans and Payables [Member] Member eocc:LoansAndPayablesCategoryMember
1856 Derivatives Designated as Hedges [Member] Member eocc:DerivativesDesignatedAsHedgesMember
1857 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1858 Interest-bearing loans Concept (Monetary) As Of Credit eocc:InterestBearingLoansAndBorrowingsCurrent
1859 Derivative instruments Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
1860 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
1861 Total current Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
1862 Interest-bearing loans Concept (Monetary) As Of Credit eocc:InterestBearingLoansAndBorrowingsNoncurrent
1863 Derivative instruments Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
1864 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
1865 Total non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
1866 Total Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1867 101540 - Disclosure - Financial Instruments - Summary of Financial Derivative Transactions Qualifying as Hedge Instruments Resulted in Recognition of Assets and Liabilities (Detail) Network

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1868 Disclosure Of Hedge Accounting [Table] Table

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ifrs-full:DisclosureOfHedgeAccountingTable
1869 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1870 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1871 Exchange rate hedge [Member] Member ifrs-full:CurrencySwapContractMember
1872 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1873 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1874 Cash Flow Hedge [Member] Member ifrs-full:CashFlowHedgesMember
1875 Disclosure Of Hedge Accounting [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1876 Assets Current Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1877 Assets Non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
1878 Liabilities Current Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
1879 Liabilities Non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
1880 101550 - Disclosure - Financial Instruments - Summary of Hedge Derivative Instruments and Their Corresponding Hedged Instruments (Detail) Network

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1881 Disclosure Of Hedge Accounting [Table] Table

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ifrs-full:DisclosureOfHedgeAccountingTable
1882 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1883 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1884 Exchange rate hedge [Member] Member ifrs-full:CurrencySwapContractMember
1885 Forward [Member] Member ifrs-full:ForwardContractMember
1886 Disclosure Of Hedge Accounting [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1887 Type of hedging instrument Concept (Text/String) For Period ifrs-full:DescriptionOfTypeOfHedge
1888 Description of hedging instrument Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRisksBeingHedged
1889 Description of hedged item Concept (Text/String) For Period ifrs-full:DescriptionOfFinancialInstrumentsDesignatedAsHedgingInstrument
1890 Fair value of hedged item Concept (Monetary) As Of ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
1891 Type of risks hedged Concept (Text/String) For Period eocc:DescriptionOfTypeOfRisksHedged
1892 101560 - Disclosure - Financial Instruments - Additional Information (Detail) Network

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1893 Implied Table Table

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1894 Disclosure Of Financial Liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
1895 Gains or losses recognized Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
1896 101570 - Disclosure - Financial Instruments - Summary of Financial Derivative Transactions Recorded at Fair Value Through Profit or Loss Resulted in the Recognition of Assets and Liabilities (Detail) Network

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1897 Disclosure Of Hedge Accounting [Table] Table

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ifrs-full:DisclosureOfHedgeAccountingTable
1898 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1899 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
1900 Non-hedging derivative instrument [Member] Member eocc:NonhedgingDerivativeInstrumentMember
1901 Disclosure Of Hedge Accounting [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1902 Assets Current Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1903 Assets Non-current Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
1904 Liabilities Current Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
1905 Liabilities Non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
1906 101580 - Disclosure - Financial Instruments - Summary of Fair Value of Hedging and Non-hedging Derivatives Entered Into by the Group as Well as the Remaining Contractual Maturities (Detail) Network

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1907 Disclosure Of Hedge Accounting [Table] Table

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ifrs-full:DisclosureOfHedgeAccountingTable
1908 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1909 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1910 Exchange rate hedge [Member] Member ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember
1911 Cash Flow Hedge [Member] Member ifrs-full:CashFlowHedgesMember
1912 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1913 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
1914 Derivatives not designated for hedge accounting [Member] Member eocc:DerivativesNotDesignatedAsHedgesMember
1915 Maturity [axis] Axis ifrs-full:MaturityAxis
1916 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1917 Less than one year [Member] Member ifrs-full:NotLaterThanOneYearMember
1918 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1919 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1920 Disclosure Of Hedge Accounting [Line Items] LineItems ifrs-full:DisclosureOfHedgeAccountingLineItems
1921 Fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1922 Notional Amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1923 101590 - Disclosure - Financial instruments- Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) Network

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1924 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Table

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eocc:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable
1925 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1926 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1927 Level 1 [Member] Member ifrs-full:Level1OfFairValueHierarchyMember
1928 Level 2 [Member] Member ifrs-full:Level2OfFairValueHierarchyMember
1929 Level 3 [Member] Member ifrs-full:Level3OfFairValueHierarchyMember
1930 Hedging instruments [axis] Axis ifrs-full:HedgingInstrumentsAxis
1931 Hedging instruments [member] Member ifrs-full:HedgingInstrumentsMember
1932 Derivatives Designated as Hedges [Member] Member eocc:DerivativesDesignatedAsHedgesMember
1933 Derivatives not designated for hedge accounting [Member] Member eocc:DerivativesNotDesignatedAsHedgesMember
1934 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1935 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1936 Financial Derivatives Asset [Member] Member eocc:FinancialDerivativesAssetMember
1937 Commodity Derivatives Assets [Member] Member eocc:CommodityDerivativesAssetsMember
1938 Available for Sale Financial Assets [Member] Member eocc:AvailableForSaleFinancialAssetsMember
1939 Financial assets at fair value, class [member] Member ifrs-full:FinancialAssetsAtFairValueMember
1940 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1941 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1942 Non-cash flow hedge [Member] Member eocc:NonCashFlowHedgesMember
1943 Cash Flow Hedge [Member] Member ifrs-full:CashFlowHedgesMember
1944 Classes of liabilities [axis] Axis ifrs-full:ClassesOfLiabilitiesAxis
1945 Liabilities [member] Member ifrs-full:LiabilitiesMember
1946 Financial Derivatives Liability [Member] Member eocc:FinancialDerivativesLiabilityMember
1947 Commodity derivatives Liabilities [Member] Member eocc:CommodityDerivativesLiabilitiesMember
1948 Measurement [axis] Axis ifrs-full:MeasurementAxis
1949 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1950 At Fair Value [Member] Member ifrs-full:AtFairValueMember
1951 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] LineItems eocc:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems
1952 Trade Receivables Past Due but not Impaired Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1953 Financial Liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1954 101600 - Disclosure - Trade and Other Payables - Summary of Breakdown of Trade and Other Payables (Detail) Network

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1955 Implied Table Table

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1956 Trade And Other Payables [Abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
1957 Current, Trade payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1958 Current, Other payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
1959 Current, Total trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
1960 Non-current, Trade payables Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToTradeSuppliers
1961 Other non-current payables Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
1962 Non-current, Total trade and other payables Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
1963 101610 - Disclosure - Trade and Other Payables - Summary of Trade and Other Payables (Detail) Network

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1964 Trade And Other Payables [Table] Table

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eocc:TradeAndOtherPayablesTable
1965 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1966 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1967 Energy Suppliers [Member] Member eocc:PayableForEnergySuppliersMember
1968 Fuel and Gas Suppliers [Member] Member eocc:PayableForFuelAndGasSuppliersMember
1969 Payables to Tax Authorities Other Than Corporate Income Tax [Member] Member eocc:PayablesToTaxAuthoritiesOtherThanCorporateIncomeTaxMember
1970 Payables for Goods and Services [Member] Member eocc:PayablesForGoodsAndServicesMember
1971 VAT Debit Tax (VAT/ICMS) [Member] Member eocc:VatPayableMember
1972 Dividends Payable to Non-controlling Interests [Member] Member eocc:DividendsPayableToNoncontrollingInterestsMember
1973 Mitsubishi Contract (LTSA) [Member] Member eocc:MitsubishiContractMember
1974 Accounts Payable to Staff [Member] Member eocc:AccountsPayableToStaffMember
1975 Other Payables [Member] Member eocc:OtherPayablesMember
1976 Trade And Other Payables [Line Items] LineItems eocc:TradeAndOtherPayablesLineItems
1977 Trade and other current payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
1978 Trade and other payables, Non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
1979 101620 - Disclosure - Provisions - Summary of Breakdown of Provisions (Detail) Network

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1980 Implied Table Table

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1981 Disclosure Of Other Provisions [Abstract] Abstract ifrs-full:DisclosureOfOtherProvisionsAbstract
1982 Provision for legal proceedings Concept (Monetary) As Of Credit ifrs-full:LongtermLegalProceedingsProvision
1983 Decommissioning or restoration Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
1984 Other provisions Concept (Monetary) As Of Credit ifrs-full:LongtermMiscellaneousOtherProvisions
1985 Total Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
1986 Provision for legal proceedings Concept (Monetary) As Of Credit ifrs-full:ShorttermLegalProceedingsProvision
1987 Decommissioning or restoration Concept (Monetary) As Of Credit ifrs-full:ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts
1988 Other provisions Concept (Monetary) As Of Credit ifrs-full:ShorttermMiscellaneousOtherProvisions
1989 Total Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
1990 101630 - Disclosure - Provisions - Summary of Changes in Provisions (Detail) Network

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1991 Disclosure Of Other Provisions [Table] Table

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ifrs-full:DisclosureOfOtherProvisionsTable
1992 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
1993 Other provisions [member] Member ifrs-full:OtherProvisionsMember
1994 Legal Proceedings [Member] Member ifrs-full:LegalProceedingsProvisionMember
1995 Decommissioning or Restoration [Member] Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
1996 Other Provisions [Member] Member ifrs-full:MiscellaneousOtherProvisionsMember
1997 Disclosure Of Other Provisions [Line Items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
1998 Beginning balance Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
1999 Changes in Provisions Abstract ifrs-full:ChangesInOtherProvisionsAbstract
2000 Increase (decrease) in existing provisions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInExistingProvisionsOtherProvisions
2001 Provisions used Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
2002 Reversal of Not Used Provision Concept (Monetary) For Period Debit ifrs-full:UnusedProvisionReversedOtherProvisions
2003 Increase for adjustment to value of money over time Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions
2004 Foreign currency translation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
2005 Total changes in provisions Concept (Monetary) For Period Credit ifrs-full:ChangesInOtherProvisions
2006 Ending balance Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2007 101640 - Disclosure - Employee Benefit Obligations - Summary of Post Employment Obligations Associated with Defined Benefits Plan (Detail) Network

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2008 Implied Table Table

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2009 Disclosure Of Defined Benefit Plans [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2010 Post-employment obligations Concept (Monetary) As Of Credit ifrs-full:DefinedBenefitObligationAtPresentValue
2011 Total Concept (Monetary) As Of Credit ifrs-full:ProvisionsForEmployeeBenefits
2012 Non-current provisions for employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
2013 101650 - Disclosure - Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Detail) Network

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2014 Implied Table Table

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2015 Disclosure Of Net Defined Benefit Liability Asset [Abstract] Abstract ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
2016 Beginning balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2017 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2018 Net interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2019 Actuarial (gains) losses from changes in financial assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
2020 Actuarial (gains) losses from changes in seniority adjustments Concept (Monetary) For Period Credit eocc:ActuarialGainsLossesArisingFromChangesInExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
2021 Foreign currency translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
2022 Contributions paid by the Company Concept (Monetary) For Period Debit eocc:BenefitsPaidNetDefinedBenefitLiabilityAsset
2023 Defined benefit plan obligations from the past service costs Concept (Monetary) For Period Credit ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
2024 Transfer of personnel Concept (Monetary) For Period Credit eocc:TransferOfEmployeesNetDefinedBenefitLiabilityAsset
2025 Classified as liabilities associated with assets held for distribution to owners Concept (Monetary) For Period Credit eocc:ClassifiedAsLiabilitiesAssociatedWithAssetsHeldForDistributionToOwnersNetDefinedBenefitLiabilityAsset
2026 Other changes Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2027 Ending balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2028 Transfer to held for sale Concept (Monetary) For Period Credit eocc:TransferToHeldForSaleNetDefinedBenefitLiabilityAsset
2029 101660 - Disclosure - Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Parenthetical) (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfChangesInPostEmploymentDefinedBenefitObligationsParentheticalDetail
2030 Implied Table Table

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implied:Table
2031 Disclosure Of Net Defined Benefit Liability Asset [Abstract] Abstract ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
2032 Current service cost related to continuing operations Concept (Monetary) For Period Credit eocc:CurrentServiceCostRelatedToContinuingOperationsNetDefinedBenefitLiabilityAsset
2033 Net interest cost related to continuing operations Concept (Monetary) For Period Credit eocc:NetInterestCostRelatedToContinuingOperationsNetDefinedBenefitLiabilityAsset
2034 Actuarial losses related to continuing operations Concept (Monetary) For Period Credit eocc:ActuarialGainsLossesRelatedToContinuingOperationsNetDefinedBenefitLiabilityAsset
2035 101670 - Disclosure - Employee Benefit Obligations - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsAdditionalInformationDetail
2036 Implied Table Table

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*

implied:Table
2037 Disclosure Of Defined Benefit Plans [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2038 Employer contribution to defined benefit plan fund Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
2039 Percentage of sensitizations post-employment benefits to variations Concept (Percent) As Of eocc:PercentageOfSensitisationsOnPostEmploymentBenefits
2040 Discount rate assumes a decrease Concept (Monetary) For Period Debit eocc:DiscountRateAssumesDecrease
2041 Discount rate assumes a increase Concept (Monetary) For Period Credit eocc:DiscountRateAssumesIncreaseDecrease
2042 Defined benefit plans will increase Concept (Monetary) For Period Debit eocc:BenefitPlansIncrease
2043 Weighted average term Concept (xbrli:durationItemType) For Period eocc:WeightedAverageTermOfDebtMaturities
2044 101680 - Disclosure - Employee Benefit Obligations - Summary of Defined Benefit Plans Expense Recognized in Statements of Comprehensive Income (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfDefinedBenefitPlansExpenseRecognizedInStatementsOfComprehensiveIncomeDetail
2045 Disclosure Of Net Defined Benefit Recognized In Consolidated Statement Of Comprehensive Income [Table] Table

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eocc:DisclosureOfNetDefinedBenefitRecognizedInConsolidatedStatementOfComprehensiveIncomeTable
2046 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2047 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2048 Other Comprehensive Income [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
2049 Disclosure Of Net Defined Benefit Recognized In Consolidated Statement Of Comprehensive Income [Line Items] LineItems eocc:DisclosureOfNetDefinedBenefitRecognizedInConsolidatedStatementOfComprehensiveIncomeLineItems
2050 Current service cost for defined benefits plan Concept (Monetary) For Period Debit eocc:CurrentServiceCostForDefinedBenefitsPlan
2051 Interest cost for defined benefits plan Concept (Monetary) For Period Debit eocc:InterestCostForDefinedBenefitsPlan
2052 Past service costs Concept (Monetary) For Period Debit eocc:PastServiceCosts
2053 Expenses recognized in the Statement of Income Concept (Monetary) For Period Debit eocc:ExpensesRecognizedInDefinedBenefitsPlan
2054 Losses from remeasurement of defined benefit plans Concept (Monetary) For Period Credit eocc:GainsLossesFromRemeasurementOfDefinedBenefitPlans
2055 Total expense recognized in Comprehensive Income Statement Concept (Monetary) For Period Credit eocc:EmployeeBenefitsExpenseAmountOfSettlementGainLossRecognized
2056 101690 - Disclosure - Employee Benefit Obligations - Summary of Assumptions Used in Actuarial Calculation of Defined Benefits (Detail) Network

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2057 Implied Table Table

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implied:Table
2058 Disclosure For Actuarial Assumptions [Abstract] Abstract eocc:DisclosureForActuarialAssumptionsAbstract
2059 Discount rates used Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2060 Expected rate of salary increases Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2061 Mortality tables Concept (Text/String) For Period eocc:ActuarialAssumptionMortalityTables
2062 Expected rotation rate Concept (Percent) As Of eocc:ActuarialAssumptionExpectedRotationRate
2063 101700 - Disclosure - Employee Benefit Obligations - Summary of Expected Flow for Benefits for Next Five Years (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfExpectedFlowForBenefitsForNextFiveYearsDetail
2064 Disclosure Of Defined Benefit Plans [Table] Table

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ifrs-full:DisclosureOfDefinedBenefitPlansTable
2065 Maturity [axis] Axis ifrs-full:MaturityAxis
2066 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2067 Less than one year [Member] Member ifrs-full:NotLaterThanOneYearMember
2068 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2069 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2070 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2071 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2072 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
2073 Disclosure Of Defined Benefit Plans [Line Items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2074 Estimate of contributions expected to be paid to plan Concept (Monetary) For Period Credit ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
2075 101710 - Disclosure - Total Equity - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquityAdditionalInformationDetail
2076 Disclosure Of Shareholders Equity [Table] Table

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eocc:DisclosureOfShareholdersEquityTable
2077 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
2078 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
2079 Final Dividends [Member] Member eocc:FinalDividendsMember
2080 Maturity [axis] Axis ifrs-full:MaturityAxis
2081 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2082 Dividend Policy for 2016 [Member] Member eocc:TwoThousandSixteenMember
2083 Dividend policy for 2017 [Member] Member eocc:TwoThousandSeventeenMember
2084 Disclosure Of Shareholders Equity [Line Items] LineItems eocc:DisclosureOfShareholdersEquityLineItems
2085 Issued capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
2086 Number of shares outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
2087 Share premium Concept (Monetary) As Of Credit ifrs-full:SharePremium
2088 Dividend Per Share Concept (Share) As Of eocc:DividendPerShare
2089 Dividend policy description Concept (Text/String) For Period eocc:DividendDescription
2090 101720 - Disclosure - Total Equity - Schedule of Dividends Paid (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquityScheduleOfDividendsPaidDetail
2091 Disclosure Of Dividends [Table] Table

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eocc:DisclosureOfDividendsTable
2092 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
2093 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
2094 Interim Dividends [Member] Member eocc:InterimDividendsMember
2095 Final Dividends [Member] Member eocc:FinalDividendsMember
2096 Maturity [axis] Axis ifrs-full:MaturityAxis
2097 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2098 2011 [Member] Member eocc:TwoThousandElevenMember
2099 2012 [Member] Member eocc:TwoThousandTwelveMember
2100 2013 [Member] Member eocc:TwoThousandThirteenMember
2101 2014 [Member] Member eocc:TwoThousandFourteenMember
2102 2015 [Member] Member eocc:TwoThousandFifteenMember
2103 2016 [Member] Member eocc:TwoThousandSixteenMember
2104 2017 [Member] Member eocc:TwoThousandSeventeenMember
2105 2018 [Member] Member eocc:TwoThousandEighteenMember
2106 Disclosure Of Dividends [Line Items] LineItems eocc:DisclosureOfDividendsLineItems
2107 Number Concept (Integer) For Period eocc:DividendsPaidBySerialOrderNumber
2108 Type of Dividends Concept (Text/String) For Period eocc:DividendTypeDescription
2109 Payment date Concept (Date) For Period eocc:DividendPayableDate
2110 Chilean Pesos per Share Concept (Share) As Of eocc:DividendPerShare
2111 Effecting the year Concept (Year) For Period eocc:DividendsPaidEffectiveYear
2112 101730 - Disclosure - Total Equity - Summary of Foreign Currency Translation Adjustments (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfForeignCurrencyTranslationAdjustmentsDetail
2113 Disclosure Of Foreign Currency Translation Reserves [Table] Table

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eocc:DisclosureOfForeignCurrencyTranslationReservesTable
2114 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2115 Equity [member] Member ifrs-full:EquityMember
2116 Reserve for Exchange Differences in Foreign Currency Translation [Member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
2117 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2118 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2119 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
2120 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
2121 Others [Member] Member eocc:OthersMember
2122 Disclosure Of Foreign Currency Translation Reserves [Line Items] LineItems eocc:DisclosureOfForeignCurrencyTranslationReservesLineItems
2123 Total Concept (Monetary) As Of Credit ifrs-full:Equity
2124 101740 - Disclosure - Total Equity - Summary of Other Reserves Within Equity (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfOtherReservesWithinEquityDetail
2125 Disclosure Of Other Reserves [Table] Table

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eocc:DisclosureOfOtherReservesTable
2126 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2127 Equity [member] Member ifrs-full:EquityMember
2128 Reserve for Exchange Differences in Foreign Currency Translation [Member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
2129 Reserve for Cash Flow Hedges [Member] Member ifrs-full:ReserveOfCashFlowHedgesMember
2130 Reserve for Gains and Losses on Remeasuring Available-for-Sale Financial Assets [Member] Member ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
2131 Other Reserves Related to Assets Held for Sale and Disposal Groups [Member] Member ifrs-full:AmountRecognisedInOtherComprehensiveIncomeAndAccumulatedInEquityRelatingToNoncurrentAssetsOrDisposalGroupsHeldForSaleMember
2132 Other Miscellaneous Reserves [Member] Member ifrs-full:MiscellaneousOtherReservesMember
2133 Other Reserves within Equity Related to Non-current Assets and Disposal Groups and Liabilities Associated Held for Sale or Distribution to Owners [Member] Member eocc:OtherReservesWithinEquityRelatedToNonCurrentAssetsAndDisposalGroupsAndLiabilitiesAssociatedHeldForSaleOrDistributionToOwnersMember
2134 Disclosure Of Other Reserves [Line Items] LineItems eocc:DisclosureOfOtherReservesLineItems
2135 Other reserves, Beginning balance Concept (Monetary) As Of Credit ifrs-full:OtherReserves
2136 Other reserves, Changes Concept (Monetary) For Period Credit eocc:ChangesInOtherReservesNetOfTaxes
2137 Other reserves, Ending balance Concept (Monetary) As Of Credit ifrs-full:OtherReserves
2138 101750 - Disclosure - Total Equity - Summary of Other Miscellaneous Reserves and Their Effects (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfOtherMiscellaneousReservesAndTheirEffectsDetail
2139 Disclosure Of Other Reserves [Table] Table

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eocc:DisclosureOfOtherReservesTable
2140 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2141 Equity [member] Member ifrs-full:EquityMember
2142 Reserve for Corporate Reorganization ("Spin-Off") [Member] Member eocc:ReserveForCorporateReorganizationMember
2143 Reserve for Transition to IFRS [Member] Member eocc:ReserveForTransitionToIFRSMember
2144 Reserve for Subsidiaries Transactions [Member] Member eocc:ReserveForSubsidiariesTransactionsMember
2145 Other Miscellaneous Reserves [Member] Member ifrs-full:MiscellaneousOtherReservesMember
2146 Disclosure Of Other Reserves [Line Items] LineItems eocc:DisclosureOfOtherReservesLineItems
2147 Other miscellaneous reserves Concept (Monetary) As Of Credit eocc:OtherMiscellaneousReserves
2148 101760 - Disclosure - Total Equity - Summary of Non-controlling Interests (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfNonControllingInterestsDetail
2149 Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [Table] Table

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eocc:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
2150 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2151 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2152 Empresa Electrica Pehuenche S.A. [Member] Member eocc:EmpresaElectricaPehuencheSAMember
2153 Compania Electrica Tarapaca S.A. [Member] Member eocc:CompaniaElectricaTarapacaSAMember
2154 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
2155 Empresa Generadora De Energia Electrica S.A. [Member] Member eocc:EmpresaGeneradoraDeEnergiaElectricaSAMember
2156 Generandes Peru S.A. [Member] Member eocc:GenerandesPeruSAMember
2157 Enel Generacion Peru S.A. [Member] Member eocc:EnelGeneracionPeruSAMember
2158 Chinango S.A.C. [Member] Member eocc:ChinangoSACMember
2159 Enel Generacion Costanera S.A. [Member] Member eocc:EnelGeneracionCostaneraSAMember
2160 Enel Generacion el Chocon S.A. [Member] Member eocc:EnelGeneracionElChoconSAMember
2161 Others [Member] Member eocc:OthersMember
2162 Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [Line Items] LineItems eocc:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesLineItems
2163 Percentage of non-controlling interests Concept (Percent) As Of eocc:PercentageOfNoncontrollingInterests
2164 Non-controlling Interests, Equity Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
2165 Non-controlling Interests, Profit (Loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
2166 101770 - Disclosure - Revenue and Other Income - Summary of Revenues and Other Income (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRevenueAndOtherIncomeSummaryOfRevenuesAndOtherIncomeDetail
2167 Disclosure Of Revenue And Other Operating Income [Table] Table

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eocc:DisclosureOfRevenueAndOtherOperatingIncomeTable
2168 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2169 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2170 Sales of Products and Services [Member] Member eocc:OtherProductsAndServicesMember
2171 Tolls and Transmission [Member] Member eocc:TollsAndTransmissionMember
2172 Other Services [Member] Member eocc:OtherServicesMember
2173 Types of rate-regulated activities [axis] Axis ifrs-full:TypesOfRateregulatedActivitiesAxis
2174 Rate-regulated activities [member] Member ifrs-full:RateregulatedActivitiesMember
2175 Energy Sales [Member] Member eocc:EnergySalesMember
2176 Generation [Member] Member eocc:GenerationMember
2177 Natural Gas Sales [Member] Member ifrs-full:GasDistributionMember
2178 Other Services Provided [Member] Member eocc:RevenueFromOtherServicesMember
2179 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
2180 Customers [member] Member ifrs-full:MajorCustomersMember
2181 Regulated Customers [Member] Member eocc:RegulatedCustomersMember
2182 Non-regulated Customers [Member] Member eocc:UnregulatedCustomersMember
2183 Spot Market Sales [Member] Member eocc:SpotMarketSalesMember
2184 Disclosure Of Revenue And Other Operating Income [Line Items] LineItems eocc:DisclosureOfRevenueAndOtherOperatingIncomeLineItems
2185 Revenue from sale of electricity Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfElectricity
2186 Revenue from sale of goods Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoods
2187 Revenue from rendering of services Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServices
2188 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
2189 Commodity derivatives Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
2190 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
2191 Other operating income Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
2192 101780 - Disclosure - Raw Materials and Consumables Used - Schedule of Raw Materials and Consumables Used (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRawMaterialsAndConsumablesUsedScheduleOfRawMaterialsAndConsumablesUsedDetail
2193 Implied Table Table

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implied:Table
2194 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2195 Energy purchases Concept (Monetary) For Period Debit ifrs-full:EnergyExpense
2196 Fuel consumption Concept (Monetary) For Period Debit ifrs-full:FuelExpense
2197 Transportation costs Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
2198 Other raw materials and consumables Concept (Monetary) For Period Debit eocc:OtherRawMaterialsAndConsumablesUsed
2199 Total raw materials and consumables Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
2200 101790 - Disclosure - Employee Benefits Expense - Summary of Employee Expenses (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitsExpenseSummaryOfEmployeeExpensesDetail
2201 Implied Table Table

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implied:Table
2202 Classes Of Employee Benefits Expense [Abstract] Abstract ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
2203 Wages and salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
2204 Post-employment benefit obligations expense Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
2205 Social security and other contributions Concept (Monetary) For Period Debit eocc:SocialSecurityAndOtherContributions
2206 Other staff expenses Concept (Monetary) For Period Debit ifrs-full:OtherEmployeeExpense
2207 Total employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
2208 101800 - Disclosure - Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Detail) Network

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2209 Implied Table Table

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implied:Table
2210 Disclosure Of Depreciation Amortization And Impairment [Abstract] Abstract eocc:DisclosureOfDepreciationAmortizationAndImpairmentAbstract
2211 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
2212 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
2213 Subtotal Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
2214 Impairment loss recognized in the period’s profit or loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
2215 Total depreciation, amortization and impairment losses Concept (Monetary) For Period Debit ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
2216 101810 - Disclosure - Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Parenthetical) (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLossesSummaryOfDepreciationAmortizationAndImpairmentLossesParentheticalDetail
2217 Disclosure Of Depreciation Amortization And Impairment [Table] Table

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eocc:DisclosureOfDepreciationAmortizationAndImpairmentTable
2218 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2219 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
2220 Continuing Operations [Member] Member ifrs-full:ContinuingOperationsMember
2221 Disclosure Of Depreciation Amortization And Impairment [Line Items] LineItems eocc:DisclosureOfDepreciationAmortizationAndImpairmentLineItems
2222 (Impairment)/Reversal of impairment Concept (Monetary) For Period Debit eocc:ImpairmentLossReversalOfImpairmentLossOtherThanBadDebtExpensesAndPropertyPlantAndEquipmentRecognisedInProfitOrLoss
2223 (Charge)/Reversal of bad debt expense for financial assets Concept (Monetary) For Period Debit eocc:ImpairmentLossReversalOfImpairmentLossOfBadDebtExpenseForFinancialAssets
2224 (Impairment)/Reversal of impairment losses recognized in profit or loss Concept (Monetary) For Period Debit eocc:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
2225 Total Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
2226 101820 - Disclosure - Other Expenses - Summary of Other Operating Expenses (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesSummaryOfOtherOperatingExpensesDetail
2227 Implied Table Table

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implied:Table
2228 Disclosure Of Cost And Expenses By Nature [Abstract] Abstract eocc:DisclosureOfCostAndExpensesByNatureAbstract
2229 Professional, outsourced and other services Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
2230 Other supplies and services Concept (Monetary) For Period Debit eocc:OtherSuppliesAndServices
2231 Insurance premiums Concept (Monetary) For Period Debit ifrs-full:InsuranceExpense
2232 Taxes and charges Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
2233 Repairs and maintenance Concept (Monetary) For Period Debit ifrs-full:RepairsAndMaintenanceExpense
2234 Marketing, public relations and advertising Concept (Monetary) For Period Debit ifrs-full:SalesAndMarketingExpense
2235 Leases and rental costs Concept (Monetary) For Period Debit ifrs-full:RentalExpense
2236 Environmental expenses Concept (Monetary) For Period Debit eocc:EnvironmentalRelatedExpenses
2237 Huechún and Chillán projects written-off Concept (Monetary) For Period Debit eocc:HuechunAndChillanProjectsWrittenOff
2238 Current projects written-off Concept (Monetary) For Period Debit eocc:CurrentProjectsWrittenOff
2239 Other supplies Concept (Monetary) For Period Debit eocc:OtherSupplies
2240 Travel expenses Concept (Monetary) For Period Debit ifrs-full:TravelExpense
2241 Indemnities and fines Concept (Monetary) For Period Debit eocc:IndemnitiesAndFines
2242 Total other expenses by nature Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
2243 101830 - Disclosure - Other Expenses - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesAdditionalInformationDetail
2244 Implied Table Table

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*

implied:Table
2245 Disclosure Of Cost And Expenses By Nature [Abstract] Abstract eocc:DisclosureOfCostAndExpensesByNatureAbstract
2246 Research activities expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
2247 101840 - Disclosure - Other Gains, Net - Summary of Other Gains, Net (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherGainsNetSummaryOfOtherGainsNetDetail
2248 Disclosure Of Other Gain And Loss [Table] Table

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eocc:DisclosureOfOtherGainAndLossTable
2249 Legal Entity Axis dei:LegalEntityAxis
2250 Entity Member dei:EntityDomain
2251 Sociedad Concesionaria Tunel El Melon S.A. Member eocc:SociedadConcesionariaTunelElMelonSAMember
2252 GNL Quintero [Member] Member eocc:GNLQuinteroSAMember
2253 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2254 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2255 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
2256 Disclosure Of Other Gain And Loss [Line Items] LineItems eocc:DisclosureOfOtherGainAndLossLineItems
2257 Gain on disposal of Electrogas,Sociedad Concesionaria Tunel El Melon S.A. and GNL Quintero Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfInvestments
2258 Gain on sale of land Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
2259 Other Concept (Monetary) For Period Credit eocc:OtherInvestmentsGainsLosses
2260 Total other gains, net Concept (Monetary) For Period Credit ifrs-full:OtherGainsLosses
2261 101850 - Disclosure - Financial Results - Summary of Financial Income and Costs (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResultsSummaryOfFinancialIncomeAndCostsDetail
2262 Implied Table Table

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implied:Table
2263 Financial Results [Abstract] Abstract eocc:FinancialResultsAbstract
2264 Cash and cash equivalents Concept (Monetary) For Period Credit eocc:IncomeProvidedByCashAndCashEquivalents
2265 Other financial income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
2266 Total financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
2267 Financial costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
2268 Bank loans Concept (Monetary) For Period Debit eocc:BankTermLoans
2269 Secured and unsecured obligations Concept (Monetary) For Period Credit eocc:SecuredAndUnsecuredObligations
2270 Valuation of financial derivatives Concept (Monetary) For Period Debit eocc:ValuationOfFinancialDerivatives
2271 Post-employment benefit obligations Concept (Monetary) For Period Debit eocc:InterestCostForDefinedBenefitsPlan
2272 Capitalized borrowing costs Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
2273 Formalization of debts and other associated expenses Concept (Monetary) For Period Debit eocc:FormalizationOfDebtsAndOtherAssociatedExpenses
2274 Other Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
2275 Gains from indexed assets and liabilities, net Concept (Monetary) For Period Credit eocc:ProfitLossFromIndexedAssetsAndLiabilities
2276 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
2277 Positive Concept (Monetary) For Period Debit eocc:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLossPositive
2278 Negative Concept (Monetary) For Period Credit eocc:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLossNegative
2279 Total financial costs Concept (Monetary) For Period Debit eocc:FinanceCostsGross
2280 Total financial results Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
2281 101860 - Disclosure - Financial Results - Summary of Effects on Exchange Differences and Application of Indexed Assets and Liabilities (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResultsSummaryOfEffectsOnExchangeDifferencesAndApplicationOfIndexedAssetsAndLiabilitiesDetail
2282 Disclosure Of Financial Results [Table] Table

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*

eocc:DisclosureOfFinancialResultsTable
2283 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
2284 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
2285 Other Financial Assets (Derivative Instruments) [Member] Member eocc:OtherFinancialAssetMember
2286 Other Non-financial Assets [Member] Member eocc:OtherNonFinancialAssetMember
2287 Trade and Other Accounts Receivable [Member] Member eocc:TradeAndOtherAccountsReceivableMember
2288 Current Tax Receivables and Liabilities [Member] Member eocc:CurrentTaxReceivablesAndLiabilitiesMember
2289 Other Financial Liabilities (Financial Debt and Derivative Instruments) [Member] Member eocc:OtherFinancialLiabilityMember
2290 Other Provisions [Member] Member eocc:OtherProvisionMember
2291 Cash and Cash Equivalents [Member] Member eocc:CashAndCashEquivalentMember
2292 Trade and Other Accounts Payable [Member] Member eocc:TradeAndOtherAccountsPayableMember
2293 Disclosure Of Financial Results [Line Items] LineItems eocc:DisclosureOfFinancialResultsLineItems
2294 Gains from indexed assets and liabilities, net Concept (Monetary) For Period Credit eocc:GainsLossFromIndexedAssetsAndLiabilitiesNet
2295 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
2296 101870 - Disclosure - Income Taxes - Components of Income Tax Expense/(Benefit) (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetail
2297 Implied Table Table

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*

implied:Table
2298 Current Tax Expense Income And Adjustments For Current Tax Of Prior Periods [Abstract] Abstract ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
2299 Current income tax Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
2300 Adjustments to current tax from the previous period Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
2301 Expense for current income tax due to changes in tax rates or the introduction of new taxes Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeRelatingToChangesInAccountingPoliciesAndErrorsIncludedInProfitOrLoss
2302 Current tax income/(expense) related to hedge accounting Concept (Monetary) For Period Debit eocc:CurrentTaxExpenseIncomeRelatedToHedgeAccounting
2303 Current tax expense, net Concept (Monetary) For Period Debit eocc:CurrentTaxExpenseIncomeNet
2304 Expense from deferred taxes for origination and reversal of temporary differences Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
2305 Expense for deferred income tax due to changes in tax rates or the introduction of new taxes Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
2306 Total deferred tax benefit Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
2307 Income tax expense, continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2308 101880 - Disclosure - Income Taxes - Reconciliation of Computed Income Tax Expense (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfComputedIncomeTaxExpenseDetail
2309 Implied Table Table

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*

implied:Table
2310 Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates [Abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
2311 Total tax income (expense) using statutory rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
2312 Tax effect of rates applied in other countries Concept (Percent) For Period ifrs-full:TaxRateEffectOfForeignTaxRates
2313 Tax effect of non-taxable operations Concept (Percent) For Period eocc:TaxEffectOfNonTaxableOperationsPercentage
2314 Tax effect of non-tax-deductible expenses Concept (Percent) For Period ifrs-full:TaxRateEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
2315 Tax effect of adjustments to deferred taxes in previous periods Concept (Percent) For Period eocc:TaxRateEffectOfAdjustmentsForDeferredTaxOfPriorPeriods
2316 Price level restatement for tax purposes (equity investments) Concept (Percent) For Period eocc:TaxRateEffectOfPriceLevelRestatement
2317 Total adjustments to tax expense using statutory rates Concept (Percent) For Period eocc:AdjustmentsToApplicableTaxRateNet
2318 Actual income tax expense Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
2319 ACCOUNTING PROFIT BEFORE INCOME TAX Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
2320 Total tax income (expense) using statutory rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
2321 Tax effect of rates applied in other countries Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
2322 Tax effect of non-taxable operations Concept (Monetary) For Period Credit eocc:TaxEffectOfNonTaxableOperations
2323 Tax effect of non-tax-deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
2324 Tax effect of adjustments to deferred taxes in previous periods Concept (Monetary) For Period Debit eocc:TaxEffectOfAdjustmentsForDeferredTaxOfPriorPeriods
2325 Price level restatement for tax purposes (equity investments) Concept (Monetary) For Period Debit eocc:TaxEffectFromChangePriceLevelRestatement
2326 Total adjustments to tax expense using statutory rates Concept (Monetary) For Period Debit eocc:TaxEffectAdjustmentToTaxExpenseApplicableTaxRateNet
2327 Income tax expense, continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2328 101890 - Disclosure - Supplemental Disaggregated Financial Information - Summary of Supplemental Disaggregated Financial Information on Geographic Basis (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSupplementalDisaggregatedFinancialInformationSummaryOfSupplementalDisaggregatedFinancialInformationOnGeographicBasisDetail
2329 Disclosure Of Geographical Areas [Table] Table

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*

ifrs-full:DisclosureOfGeographicalAreasTable
2330 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2331 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2332 Chile [Member] Member country:CL
2333 Argentina [Member] Member country:AR
2334 Colombia [Member] Member country:CO
2335 Peru [Member] Member country:PE
2336 Consolidation Items Axis us-gaap:ConsolidationItemsAxis
2337 Consolidation Items Member us-gaap:ConsolidationItemsDomain
2338 Reportable Geographical Components [Member] Member us-gaap:ReportableGeographicalComponentsMember
2339 Geography Eliminations [Member] Member us-gaap:GeographyEliminationsMember
2340 Disclosure Of Geographical Areas [Line Items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
2341 Revenues and Other Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
2342 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
2343 Energy sales Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfElectricity
2344 Other sales Concept (Monetary) For Period Credit eocc:RevenueFromOtherSales
2345 Other services rendered Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServices
2346 Other operating income Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
2347 Total raw materials and consumables Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
2348 Energy purchases Concept (Monetary) For Period Debit ifrs-full:EnergyExpense
2349 Fuel consumption Concept (Monetary) For Period Debit ifrs-full:FuelExpense
2350 Transportation expenses Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
2351 Other miscellaneous supplies and services Concept (Monetary) For Period Debit eocc:OtherRawMaterialsAndConsumablesUsed
2352 Contribution Margin from continuing operations Concept (Monetary) For Period Credit ifrs-full:GrossProfit
2353 Other work performed by the entity and capitalized Concept (Monetary) For Period Credit ifrs-full:OtherWorkPerformedByEntityAndCapitalised
2354 Employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
2355 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
2356 GROSS OPERATING INCOME Concept (Monetary) For Period Credit eocc:GrossOperatingIncome
2357 Depreciation and amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
2358 Impairment losses (reversals of impairment losses) recognized in profit or loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
2359 Operating Income from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
2360 FINANCIAL RESULT Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
2361 Total financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
2362 Income from deposits and other financial instruments Concept (Monetary) For Period Credit eocc:IncomeFromDepositsAndOtherFinancialInstruments
2363 Other financial income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
2364 Financial costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
2365 Bank borrowings Concept (Monetary) For Period Debit eocc:BankTermLoans
2366 Secured and unsecured obligations Concept (Monetary) For Period Credit eocc:SecuredAndUnsecuredObligations
2367 Other Concept (Monetary) For Period Debit eocc:OtherMiscellaneousFinanceCost
2368 Gains (losses) from indexed assets and liabilities Concept (Monetary) For Period Credit eocc:ProfitLossFromIndexedAssetsAndLiabilities
2369 Foreign currency exchange differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
2370 Positive Concept (Monetary) For Period Debit eocc:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLossPositive
2371 Negative Concept (Monetary) For Period Credit eocc:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLossNegative
2372 Share of profit (loss) of associates and joint ventures accounted for using the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2373 Total other gains, net Concept (Monetary) For Period Credit ifrs-full:OtherGainsLosses
2374 Gain (loss) from other investments Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfInvestments
2375 Gain (loss) from the sale of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
2376 INCOME BEFORE TAX Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
2377 Income tax expense, continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2378 NET INCOME FROM CONTINUING OPERATIONS Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
2379 Profit after tax for the year from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
2380 NET PROFIT FOR THE YEAR Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
2381 Shareholders of the parent company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
2382 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
2383 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
2384 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
2385 Net cash provided by (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
2386 101900 - Disclosure - Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments - Additional Information (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureThirdPartyGuaranteesOtherContingentAssetsAndLiabilitiesAndOtherCommitmentsAdditionalInformationDetail
2387 Disclosure Of Other Provisions [Table] Table

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*

ifrs-full:DisclosureOfOtherProvisionsTable
2388 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2389 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2390 Energy Purchase Commitments [Member] Member eocc:EnergyPurchaseCommitmentsMember
2391 Yankee Bonds [Member] Member eocc:YankeeBondsMember
2392 Local Bonds [Member] Member eocc:LocalBondsMember
2393 Series H [Member] Member eocc:SeriesHMember
2394 Series M [Member] Member eocc:SeriesMMember
2395 Continuing involvement in derecognised financial assets by type of instrument [axis] Axis ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis
2396 Types of instrument [member] Member ifrs-full:TypesOfInstrumentMember
2397 Indirect Guarantees [Member] Member eocc:IndirectGuaranteesMember
2398 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2399 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2400 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
2401 Individual assets or cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
2402 Entity's total for individual assets or cash-generating units [member] Member ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
2403 Celta Gas SMA [Member] Member eocc:CeltaGasSMAMember
2404 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2405 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2406 Domestic Credit Line [Member] Member eocc:DomesticCreditLineMember
2407 International Credit Line February Two Thousand Sixteen [Member] Member eocc:InternationalCreditLineFebruaryTwoThousandSixteenMember
2408 International Credit Line February Two Thousand Twenty [Member] Member eocc:InternationalCreditLineFebruaryTwoThousandTwentyMember
2409 Range [axis] Axis ifrs-full:RangeAxis
2410 Ranges [member] Member ifrs-full:RangesMember
2411 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
2412 Top of Range [Member] Member ifrs-full:TopOfRangeMember
2413 Disclosure Of Other Provisions [Line Items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2414 Property, plant and equipment was pledged as security for liabilities Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
2415 Future energy purchase commitments Concept (Monetary) As Of Credit ifrs-full:ContractualCapitalCommitments
2416 Guarantee outstanding Concept (Monetary) As Of Credit ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
2417 Number of lawsuits filed Concept (Decimal) For Period eocc:NumberOfLawsuitsFiled
2418 Provision recognized on litigation, percentage Concept (Percent) For Period eocc:ProvisionRecognizedOnLitigationPercentage
2419 Fine of illegality claim against the superintendency of electricity and fuels Concept (Decimal) For Period eocc:FineOfIllegalityClaimAgainstSuperintendenceOfElectricityAndFuels
2420 Percentage of provision from fine Concept (Percent) For Period eocc:PercentageOfProvisionFromFine
2421 Debt obligations Concept (Monetary) As Of Credit eocc:LongtermDebtObligations
2422 Amount overdue of debt Concept (Monetary) As Of Credit eocc:DebtOverdueAmount
2423 Percentage of debt repayment acceleration Concept (Percent) As Of eocc:CrossDefaultDebtAccelerationPercentage
2424 Amortization Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2425 Cross default limit Concept (Monetary) As Of Credit eocc:CrossDefaultAmount
2426 Percentage of bondholders, demands debt acceleration Concept (Percent) For Period eocc:PercentageOfBondholdersDemandsDebtAcceleration
2427 Cross default threshold amount Concept (Monetary) As Of Credit eocc:CrossDefaultThresholdAmount
2428 Bonds outstanding Concept (Monetary) As Of Credit eocc:OutstandingBalanceOnBonds
2429 Description of debt to capitalization ratio Concept (Text/String) For Period eocc:DebtToCapitalizationRatioDescription
2430 Financial debt to capitalization ratio, maximum Concept (Percent) For Period eocc:MaximumFinancialDebtToCapitalizationRatio
2431 Debt to capitalization ratio Concept (Percent) As Of eocc:DebtRatio
2432 Consolidated equity Concept (Monetary) As Of Credit ifrs-full:Equity
2433 Minimum equity requirement Concept (Monetary) As Of Credit eocc:MinimumEquityRequirement
2434 Financial expense coverage ratio Concept (Percent) For Period eocc:FinancialExpenseCoverageRatio
2435 Net asset position Concept (Monetary) As Of Debit eocc:NetAssetsLiabilitiesPosition
2436 Description of debt to equity ratio Concept (Text/String) For Period eocc:DebtToEquityRatioDescription
2437 Financial debt to net equity ratio, maximum Concept (Percent) For Period eocc:MaximumDebtToEquityRatio
2438 Debt to equity ratio Concept (Percent) For Period eocc:DebtToEquityRatio
2439 Debt/EBITDA ratio, description Concept (Text/String) For Period eocc:DescriptionOfDebtEBITDARatio
2440 Debt/EBITDA ratio, maximum Concept (Percent) For Period eocc:DebtEBITDARatioMaximum
2441 Debt/EBITDA ratio Concept (Percent) For Period eocc:DebtEBITDARatio
2442 Financial assets pledged as collateral for liabilities Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
2443 101910 - Disclosure - Personnel Figures - Summary of Number of Employees (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePersonnelFiguresSummaryOfNumberOfEmployeesDetail
2444 Disclosure Of Average Number Of Employees [Table] Table

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*

eocc:DisclosureOfAverageNumberOfEmployeesTable
2445 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2446 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2447 Chile [Member] Member country:CL
2448 Argentina [Member] Member country:AR
2449 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2450 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2451 Managers And Main Executives [Member] Member eocc:ManagersAndMainExecutivesMember
2452 Professionals and Technicians [Member] Member eocc:ProfessionalsAndTechniciansMember
2453 Workers And Others [Member] Member eocc:WorkersAndOthersMember
2454 Disclosure Of Average Number Of Employees [Line Items] LineItems eocc:DisclosureOfAverageNumberOfEmployeesLineItems
2455 Number of employees Concept (Decimal) As Of ifrs-full:NumberOfEmployees
2456 Average number of employees Concept (Decimal) For Period ifrs-full:AverageNumberOfEmployees
2457 101920 - Disclosure - Sanctions - Additional Information (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSanctionsAdditionalInformationDetail
2458 Disclosure Of Contingent Liabilities [Table] Table

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*

ifrs-full:DisclosureOfContingentLiabilitiesTable
2459 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2460 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2461 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
2462 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2463 Counterparties [member] Member ifrs-full:CounterpartiesMember
2464 Biobío’s Secretary of Health Ministry [Member] Member eocc:BiobiosSecretaryOfHealthMinistryMember
2465 Antofagasta’s Health Secretary [Member] Member eocc:AntofagastaSHealthSecretaryMember
2466 Coquimbo’s Secretary of Health Ministry [Member] Member eocc:CoquimbosSecretaryOfHealthMinistryMember
2467 Superintendency of Electricity and Fuels [Member] Member eocc:SuperintendencyOfElectricityAndFuelsMember
2468 Tarapaca’s Secretary of Health Ministry [Member] Member eocc:TarapacasSecretaryOfHealthMinistryMember
2469 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2470 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2471 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
2472 Disclosure Of Contingent Liabilities [Line Items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
2473 Legal claim amount Concept (Monetary) As Of Credit ifrs-full:LegalProceedingsProvision
2474 Legal claim amount paid Concept (Monetary) For Period Credit eocc:LegalProceedingsFineAmountPaid
2475 Number of fines Concept (Integer) For Period eocc:NumberOfFines
2476 101930 - Disclosure - Environment - Summary of Environmental Expenses (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEnvironmentSummaryOfEnvironmentalExpensesDetail
2477 Environmental Expenses [Table] Table

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*

eocc:EnvironmentalExpensesTable
2478 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2479 Counterparties [member] Member ifrs-full:CounterpartiesMember
2480 Gas Atacama Chile [Member] Member eocc:GasAtacamaChileMember
2481 Pehuenche [Member] Member eocc:PehuencheMember
2482 Eolica Canela [Member] Member eocc:EolicaCanelaMember
2483 Compania Electrica de Tarapaca S.A. [Member] Member eocc:CompaniaElectricaDeTarapacaSAMember
2484 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2485 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2486 Normalization CEMS [Member] Member eocc:NormalizationCEMSMember
2487 Environmental Monitoring [Member] Member eocc:EnvironmentalMonitoringMember
2488 Hydro Power Plants Environmental Costs [Member] Member eocc:HydroPowerPlantsEnvironmentalCostsMember
2489 Environmental Expenditures In Power Plants [Member] Member eocc:EnvironmentalExpendituresInPowerPlantsMember
2490 Environmental Costs In Thermal Plants [Member] Member eocc:EnvironmentalCostsInThermalPlantsMember
2491 Improving Reforested Sectors [Member] Member eocc:ImprovingReforestedSectorsMember
2492 Environmental Costs In Combined Cycle Plants [Member] Member eocc:EnvironmentalCostsInCombinedCyclePlantsMember
2493 Environmental Costs In Hydroelectric Plants [Member] Member eocc:EnvironmentalCostsInHydroelectricPlantsMember
2494 Ralco Hydroelectric Plant [Member] Member eocc:RalcoHydroelectricPlantMember
2495 Tal Tal Thermal Plant [Member] Member eocc:TalTalThermalPlantMember
2496 Studies, Monitoring And Waste Disposal [Member] Member eocc:StudiesMonitoringAndWasteDisposalMember
2497 Studies Monitoring And Laboratory Analysis [Member] Member eocc:StudiesMonitoringAndLaboratoryAnalysisMember
2498 Coal-fired Power Stations Centrales a Carbon [Member] Member eocc:CoalFiredPowerStationsCentralesACarbonMember
2499 ZLD Plant Studies [Member] Member eocc:ZLDPlantStudiesMember
2500 CT Bocamina [Member] Member eocc:CTBocaminaMember
2501 Central Environmental Costs [Member] Member eocc:CentralEnvironmentalCostsMember
2502 Cems C.T. Quintero Project [Member] Member eocc:CemsCTQuinteroProjectMember
2503 Cems C.T. SanIsidro II Project [Member] Member eocc:CemsCTSanIsidroIIProjectMember
2504 Cems C.T. Tal Tal Project [Member] Member eocc:CemsCTTalTalProjectMember
2505 Regularizations C.H. [Member] Member eocc:RegularizationsCHMember
2506 Regularizations C.H. Ralco [Member] Member eocc:RegularizationsCHRalcoMember
2507 Waste [Member] Member eocc:WasteMember
2508 Afforestation (RCA) Water Eyes [Member] Member eocc:AfforestationRCAWaterEyesMember
2509 Waste Treatment [Member] Member eocc:WasteTreatmentMember
2510 Central Environmental Expenses [Member] Member eocc:CentralEnvironmentalExpensesMember
2511 Abatement Nox [Member] Member eocc:AbatementNoxMember
2512 Investments In Central Hydroelectric Plants [Member] Member eocc:InvestmentsInCentralHydroelectricPlantsMember
2513 Environmental Expenses [Line Items] LineItems eocc:EnvironmentalExpensesLineItems
2514 Project Name Concept (Text/String) For Period eocc:ProjectName
2515 Project Description Concept (Text/String) For Period eocc:ProjectDescription
2516 Project Status [Terminated, In Process] Concept (Text/String) For Period eocc:ProjectStatus
2517 Total Disbursements Concept (Monetary) For Period Debit eocc:DisbursementsAmount
2518 Amounts Capitalized Concept (Monetary) For Period Debit eocc:CapitalizedCost
2519 Expenses Concept (Monetary) For Period Debit eocc:EnvironmentalExpenses
2520 Total Disbursements Concept (Monetary) For Period Debit eocc:Disbursement
2521 Total disbursements previous period Concept (Monetary) For Period Debit eocc:DisbursementsPreviousPeriod
2522 101940 - Disclosure - Financial Information on Subsidiaries, Summarized - Summary of Financial Information on Subsidiaries (Detail) Network

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*

http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInformationOnSubsidiariesSummarizedSummaryOfFinancialInformationOnSubsidiariesDetail
2523 Disclosure Of Significant Investments In Subsidiaries [Table] Table

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*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
2524 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2525 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2526 Empresa Electrica Pehuenche S.A. [Member] Member eocc:EmpresaElectricaPehuencheSAMember
2527 Inversiones GasAtacama Holding Ltda. [Member] Member eocc:InversionesGasAtacamaHoldingLtdaMember
2528 Compania Electrica Tarapaca S.A. [Member] Member eocc:CompaniaElectricaTarapacaSAMember
2529 Enel Argentina (formerly named Endesa Argentina S.A.) [Member] Member eocc:EnelArgentinaSAMember
2530 Enel Generacion Costanera S.A. [Member] Member eocc:EnelGeneracionCostaneraSAMember
2531 Hidroinvest S.A. [Member] Member eocc:HidroinvestSAMember
2532 Enel Generacion el Chocon S.A. [Member] Member eocc:EnelGeneracionElChoconSAMember
2533 Southern Cone Power Argentina S.A. [Member] Member eocc:SouthernConePowerArgentinaSAMember
2534 Empresa Generadora De Energia Electrica S.A. [Member] Member eocc:EmpresaGeneradoraDeEnergiaElectricaSAMember
2535 Generandes Peru S.A. [Member] Member eocc:GenerandesPeruSAMember
2536 Enel Generacin Peru S.A. [Member] Member eocc:EnelGeneracinPeruSAMember
2537 Chinango S.A.C. [Member] Member eocc:ChinangoSACMember
2538 Generandes Peru [Member] Member eocc:GenerandesPeruMember
2539 Enel Argentina S A Group Member eocc:EnelArgentinaSAGroupMember
2540 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
2541 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
2542 Continuing Operations [Member] Member ifrs-full:ContinuingOperationsMember
2543 Discontinued Operations [Member] Member ifrs-full:DiscontinuedOperationsMember
2544 Disclosure Of Significant Investments In Subsidiaries [Line Items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
2545 Financial Statements Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfFinancialStatements
2546 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
2547 Total Non Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
2548 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
2549 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
2550 Non-current Liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
2551 Equity of Centrales Hidroeléctricas de Aysén S.A. Concept (Monetary) As Of Credit ifrs-full:Equity
2552 TOTAL LIABILITIES AND EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
2553 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
2554 Costs Concept (Monetary) For Period Debit eocc:Costs
2555 Net Profit for the Year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
2556 Other Comprehensive Income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
2557 TOTAL COMPREHENSIVE INCOME Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
2558 101950 - Disclosure - Subsequent Events - Additional Information (Detail) Network

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2559 Disclosure Of Nonadjusting Events After Reporting Period [Table] Table

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*

ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2560 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2561 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
2562 Announcing of Abandonment of Neltume and Choshuenco Hydroelectric Project [Member] Member eocc:AnnouncingOfAbandonmentOfNeltumeAndChoshuencoHydroelectricProjectMember
2563 Reorganization Process [Member] Member ifrs-full:AnnouncingOrCommencingImplementationOfMajorRestructuringMember
2564 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2565 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2566 Enel Chile S A. [Member] Member eocc:EnelChileSAMember
2567 Disclosure Of Nonadjusting Events After Reporting Period [Line Items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2568 Loss due to abandonment of project Concept (Monetary) For Period Debit eocc:LossContingencyLossDueToAbandonmentOfProject
2569 Number of shares issued upon acquisition Concept (Shares) For Period eocc:NumberOfSharesIssuedOnAcquisitionOffer
2570 Percentage of shares issued Concept (Percent) For Period eocc:PercentageOfSharesIssuedOnAcquisitionOffer
2571 Number of shares acquired Concept (Shares) For Period eocc:NumberOfIssuedSharesAcquired
2572 Percentage of acquired shares equivalent to subscribed and paid shares Concept (Percent) For Period eocc:PercentageOfAcquiredSharesEquivalentToSubscribedAndPaidShares
2573 Total number of issued shares acquired Concept (Shares) For Period eocc:AggregateNumberOfIssuedSharesAcquired
2574 Percentage of total acquired shares equivalent to subscribed and paid shares Concept (Percent) For Period eocc:AggregatePercentageOfAcquiredSharesEquivalentToSubscribedAndPaidShares
2575 101960 - Disclosure - Appendix 1 Group Companies - Schedule of Percentage of Control in Each Subsidiary (Detail) Network

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2576 Disclosure Of Significant Investments In Subsidiaries [Table] Table

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*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
2577 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2578 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2579 Central Eolica Canela S.A. [Member] Member eocc:CentralEolicaCanelaSAMember
2580 Empresa Electrica Pehuenche S.A. [Member] Member eocc:EmpresaElectricaPehuencheSAMember
2581 GasAtacama Chile S.A. [Member] Member eocc:GasAtacamaChileSAMember
2582 Gasoducto Atacama Argentina S.A. [Member] Member eocc:GasoductoAtacamaArgentinaSAMember
2583 Disclosure Of Significant Investments In Subsidiaries [Line Items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
2584 Taxpayer ID No. (RUT) Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
2585 Company Concept (Text/String) For Period ifrs-full:NameOfSubsidiary
2586 Functional Currency Concept (Text/String) For Period ifrs-full:DescriptionOfFunctionalCurrency
2587 Percentage of direct control Concept (Percent) For Period eocc:ProportionOfDirectOwnershipInterestInSubsidiary
2588 Percentage of indirect control Concept (Percent) For Period eocc:ProportionOfIndirectOwnershipInterestInSubsidiary
2589 Percentage of control Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
2590 Relationship Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
2591 Country Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
2592 Activity Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
2593 101970 - Disclosure - Appendix 2 Changes in the Scope of Consolidation - Summary of Companies Eliminated From the Scope of Consolidation (Detail) Network

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2594 Disclosure Of Subsidiaries Excluded From Consolidation [Table] Table

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*

eocc:DisclosureOfSubsidiariesExcludedFromConsolidationTable
2595 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2596 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2597 Central Eolica Canela S.A. [Member] Member eocc:CentralEolicaCanelaSAMember
2598 Gasoducto TalTal S.A. [Member] Member eocc:GasoductoTalTalSAMember
2599 GNL Norte S.A. [Member] Member eocc:GNLNorteSAMember
2600 Progas S.A. [Member] Member eocc:ProgasSAMember
2601 Compania Electrica Tarapaca S.A. [Member] Member eocc:CompaniaElectricaTarapacaSAMember
2602 Inversiones GasAtacama Holding Ltda. [Member] Member eocc:InversionesGasAtacamaHoldingLtdaMember
2603 GasAtacama S.A. [Member] Member eocc:GasAtacamaSAMember
2604 Southern Cone Power Argentina S.A. [Member] Member eocc:SouthernConePowerArgentinaSAMember
2605 Emgesa Panama S.A. [Member] Member eocc:EmgesaPanamaSAMember
2606 Sociedad Portuaria Central Cartagena S.A. [Member] Member eocc:SociedadPortuariaCentralCartagenaSAMember
2607 Enel Generacion el Chocon S.A. [Member] Member eocc:EnelGeneracionElChoconSAMember
2608 Hidroinvest S.A. [Member] Member eocc:HidroinvestSAMember
2609 Enel Generacion Costanera S.A. [Member] Member eocc:EnelGeneracionCostaneraSAMember
2610 Ingendesa do Brasil Ltda. [Member] Member eocc:IngendesaDoBrasilLtdaMember
2611 Enel Generacion Peru S.A. [Member] Member eocc:EnelGeneracionPeruSAMember
2612 Chinango S.A.C. [Member] Member eocc:ChinangoSACMember
2613 Generandes Peru [Member] Member eocc:GenerandesPeruMember
2614 Distrilec Inversora S.A. [Member] Member eocc:DistrilecInversoraSAMember
2615 Enel Trading Argentina S.R.L. [Member] Member eocc:EnelTradingArgentinaSRLMember
2616 Enel Argentina S.A. [Member] Member eocc:EnelArgentinaSAMember
2617 Central Térmica Manuel Belgrano [Member] Member eocc:CentralTermicaManuelBelgranoMember
2618 Central Térmica San Martin [Member] Member eocc:CentralTermicaSanMartinMember
2619 Central Vuelta Obligada S.A. [Member] Member eocc:CentralVueltaObligadaSAMember
2620 Enel Brasil S A [Member] Member eocc:EnelBrasilSAMember
2621 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
2622 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
2623 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
2624 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2625 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2626 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
2627 Emgesa S.A. E.S.P. [Member] Member eocc:EmgesaSAESPMember
2628 Disclosure Of Subsidiaries Excluded From Consolidation [Line Items] LineItems eocc:DisclosureOfSubsidiariesExcludedFromConsolidationLineItems
2629 Percentage of direct ownership Concept (Percent) For Period eocc:ProportionOfDirectOwnershipInterestInUnconsolidatedEntity
2630 Percentage of indirect ownership Concept (Percent) For Period eocc:ProportionOfIndirectOwnershipInterestInUnconsolidatedEntity
2631 Total Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
2632 Consolidation Method Concept (Text/String) For Period eocc:DisclosureOfConsolidationMethod
2633 101980 - Disclosure - Appendix 3 Associates and Joint Ventures - Summary of Investments Accounted for Using the Equity Method (Detail) Network

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2634 Disclosure Of Significant Investments In Associates And Joint Ventures [Table] Table

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eocc:DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesTable
2635 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2636 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2637 Centrales Hidroelectricas de Aysen S.A. [Member] Member eocc:CentralesHidroelectricasDeAysenSAMember
2638 Transmisora Electrica De Quillota Ltda [Member] Member eocc:TransmisoraElectricaDeQuillotaLtdaMember
2639 Electrogas S.A. [Member] Member eocc:ElectrogasSAMember
2640 GNL Chile S.A. [Member] Member eocc:GNLChileSAMember
2641 GNL Quintero S.A. [Member] Member eocc:GNLQuinteroSAMember
2642 Southern Cone Power Argentina S.A. [Member] Member eocc:SouthernConePowerArgentinaSAMember
2643 Enel Argentina S.A. [Member] Member eocc:EnelArgentinaSAMember
2644 Transmisora Electrica de Quillota Ltda. [Member] Member eocc:TransmisoraElectricaDeQuillotaLtdaOneMember
2645 Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items] LineItems eocc:DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesLineItems
2646 Activity Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysRelationshipWithJointVenture
2647 Activity Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysRelationshipWithAssociate
2648 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
2649 Company Concept (Text/String) For Period eocc:NameOfAssociatesAndJointVentures
2650 Currency Concept (Text/String) For Period ifrs-full:DescriptionOfFunctionalCurrency
2651 Percentage of direct ownership interest Concept (Percent) For Period eocc:ProportionOfDirectOwnershipInterestInAssociatesAndJointVentures
2652 Percentage of indirect ownership interest Concept (Percent) For Period eocc:ProportionOfIndirectOwnershipInterestInAssociatesAndJointVentures
2653 Total Concept (Percent) For Period eocc:ProportionOfOwnershipInterestInAssociatesAndJointVentures
2654 Relationship Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
2655 Country Concept (Text/String) For Period eocc:CountryOfIncorporationOrResidenceOfAssociateAndJointVentures
2656 101990 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Bank Borrowings by Currency and Maturity (Detail) Network

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2657 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
2658 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2659 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2660 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
2661 Maturity [axis] Axis ifrs-full:MaturityAxis
2662 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2663 One to three months [Member] Member ifrs-full:LaterThanOneMonthAndNotLaterThanThreeMonthsMember
2664 Three to twelve months [Member] Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanOneYearMember
2665 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2666 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2667 Chile [Member] Member country:CL
2668 Currencies Axis eocc:CurrenciesAxis
2669 Currency Member Member eocc:CurrencyMember
2670 Chilean Peso [Member] Member currency:CLP
2671 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2672 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
2673 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
2674 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
2675 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredBankLoansReceivedCurrent
2676 102000 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Identification of Bank Borrowings by Company (Detail) Network

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2677 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
2678 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2679 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2680 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
2681 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2682 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2683 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
2684 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2685 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2686 Chile [Member] Member country:CL
2687 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2688 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2689 Banco De Credito E Inversiones [Member] Member eocc:BancoDeCreditoEInversionesMember
2690 Banco Santander [Member] Member eocc:BancoSantanderMember
2691 Maturity [axis] Axis ifrs-full:MaturityAxis
2692 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2693 Less than 90 Days [Member] Member eocc:NotLaterThanNinetyDaysMember
2694 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2695 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumber
2696 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
2697 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
2698 Amortization Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2699 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredBankLoansReceivedCurrent
2700 102010 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Secured and Unsecured Liabilities by Currency and Maturity (Detail) Network

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2701 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
2702 Maturity [axis] Axis ifrs-full:MaturityAxis
2703 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2704 One to Three Months [Member] Member eocc:BetweenOneAndThreeMonthMember
2705 Three to Twelve Months [Member] Member eocc:ThreeToTwelveMonthsMember
2706 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2707 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2708 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2709 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2710 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
2711 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2712 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2713 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
2714 Currencies Axis eocc:CurrenciesAxis
2715 Currency Member Member eocc:CurrencyMember
2716 U.S. Dollar [Member] Member currency:USD
2717 Unidad de Fomento (funds code) Member currency:CLF
2718 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2719 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2720 Chile [Member] Member country:CL
2721 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2722 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
2723 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
2724 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
2725 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredCurrentLiabilities
2726 Non-current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredNonCurrentLiabilities
2727 102020 - Disclosure - Appendix 4 Additional Information on Financial Debt - Secured and Unsecured Liabilities by Company (Detail) Network

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2728 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
2729 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2730 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2731 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
2732 Currencies Axis eocc:CurrenciesAxis
2733 Currency Member Member eocc:CurrencyMember
2734 U.S. Dollar [Member] Member currency:USD
2735 Unidad de Fomento (funds code) Member currency:CLF
2736 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2737 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2738 US [Member] Member country:US
2739 Chile [Member] Member country:CL
2740 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2741 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2742 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
2743 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2744 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2745 BNY Mellon S-1 [Member] Member eocc:BNYMellonS1Member
2746 BNY Mellon S-2 [Member] Member eocc:BNYMellonS2Member
2747 BNY Mellon S-3 [Member] Member eocc:BNYMellonS3Member
2748 BNY Mellon 24296 [Member] Member eocc:BnyMellonUnica24296Member
2749 Banco Santander 317-H [Member] Member eocc:BancoSantander317HMember
2750 Banco Santander 522-M [Member] Member eocc:BancoSantander522MMember
2751 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2752 Past due status [member] Member ifrs-full:PastDueStatusMember
2753 Less Than Three Months [Member] Member ifrs-full:NotLaterThanThreeMonthsMember
2754 More than 90 Days [Member] Member ifrs-full:LaterThanThreeMonthsMember
2755 Maturity [axis] Axis ifrs-full:MaturityAxis
2756 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2757 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2758 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2759 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2760 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2761 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
2762 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2763 Taxpayer ID Number Concept (Text/String) For Period eocc:TaxpayerIdentificationNumberForCompany
2764 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
2765 Secured/ Unsecured Concept (Text/String) For Period eocc:DescriptionOfLoan
2766 Current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredCurrentLiabilities
2767 Non-current, Maturity Concept (Monetary) As Of Credit eocc:UnsecuredNonCurrentLiabilities
2768 Effective Interest Rate Concept (Percent) For Period eocc:EffectiveBorrowingInterestRate
2769 102030 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Financial Lease Obligation by Company (Detail) Network

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2770 Disclosure Of Financial Liabilities [Table] Table

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*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
2771 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2772 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2773 Undiscounted Cash Flow [Member] Member eocc:UndiscountedCashFlowMember
2774 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2775 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2776 Enel Generacion Chile S.A. [Member] Member ifrs-full:ParentMember
2777 Currencies Axis eocc:CurrenciesAxis
2778 Currency Member Member eocc:CurrencyMember
2779 U.S. Dollar [Member] Member currency:USD
2780 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2781 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2782 Chile [Member] Member country:CL
2783 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2784 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2785 Transelec S.A [Member] Member eocc:TranselecSAMember
2786 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2787 Past due status [member] Member ifrs-full:PastDueStatusMember
2788 Less Than Three Months [Member] Member ifrs-full:NotLaterThanThreeMonthsMember
2789 More than 90 Days [Member] Member ifrs-full:LaterThanThreeMonthsMember
2790 Maturity [axis] Axis ifrs-full:MaturityAxis
2791 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2792 One to Two Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2793 Two to Three Years [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2794 Three to Four Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2795 Four to Five Years [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2796 Over five years [Member] Member ifrs-full:LaterThanFiveYearsMember
2797 Disclosure of Financial Lease Obligations [Line Items] LineItems eocc:DisclosureOfFinancialLeaseObligationsLineItems
2798 Taxpayer ID No. Concept (Text/String) For Period eocc:TaxpayerIdentificationNumberTwo
2799 Nominal Interest Rate Concept (Percent) For Period eocc:NominalInterestRate
2800 Financial liabilities current Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
2801 Financial liabilities non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
2802 102040 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency - Summary of Assets and Liabilities in Foreign Currency (Detail) Network

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2803 Disclosure Of Assets And Liabilities By Currency [Table] Table

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eocc:DisclosureOfAssetsAndLiabilitiesByCurrencyTable
2804 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2805 Consolidated [member] Member ifrs-full:ConsolidatedMember
2806 Details of Assets and Liabilities in Foreign Currency [Member] Member eocc:DetailsOfAssetsAndLiabilitiesInForeignCurrencyMember
2807 Currencies Axis eocc:CurrenciesAxis
2808 Currency Member Member eocc:CurrencyMember
2809 Foreign Currency USD [Member] Member eocc:ForeignCurrencyUsdMember
2810 Foreign Currency Argentine peso [Member] Member eocc:ForeignCurrencyArgentinePesoMember
2811 Foreign Currency Euros [Member] Member eocc:ForeignCurrencyEuroMember
2812 Foreign Currency Colombian Peso Member eocc:ForeignCurrencyColombianPesoMember
2813 Maturity [axis] Axis ifrs-full:MaturityAxis
2814 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2815 Up to 90 days [Member] Member eocc:UpToNinetyDaysMember
2816 91 days to 1 year [Member] Member eocc:NinetyOneDaysToOneYearMember
2817 One to five years [Member] Member eocc:OneToFiveYearsMember
2818 More than five years [Member] Member eocc:MoreThanFiveYearsMember
2819 Disclosure Of Assets And Liabilities By Currency [Line Items] LineItems eocc:DisclosureOfAssetsAndLiabilitiesByCurrencyLineItems
2820 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
2821 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
2822 Other current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
2823 Trade and other current receivables, net Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
2824 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
2825 Current taxes receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
2826 TOTAL CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
2827 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
2828 Other non-current non-financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
2829 Trade and other non-current receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
2830 Investments accounted for using the equity method Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
2831 Intangible assets other than goodwill, net Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
2832 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
2833 TOTAL NON-CURRENT ASSETS Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
2834 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
2835 Currency Concept (Text/String) For Period ifrs-full:DescriptionOfFunctionalCurrency
2836 Other current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
2837 Trade and other current payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
2838 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
2839 Current provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
2840 Current tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
2841 TOTAL CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
2842 Other non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
2843 Trade and other payables, Non-current Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayables
2844 Non-current accounts payables to related parties Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToRelatedParties
2845 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2846 TOTAL NON-CURRENT LIABILITIES Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
2847 TOTAL LIABILITIES Concept (Monetary) As Of Credit ifrs-full:Liabilities
2848 102050 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Aging of Trade and Other Receivables (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfAgingOfTradeAndOtherReceivablesDetail
2849 Trade And Other Receivables [Table] Table

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eocc:TradeAndOtherReceivablesTable
2850 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2851 Past due status [member] Member ifrs-full:PastDueStatusMember
2852 On demand [Member] Member ifrs-full:CurrentMember
2853 1-30 days [Member] Member eocc:OneToThirtyDaysMember
2854 31-60 days [Member] Member eocc:ThirtyOneToSixtyDaysMember
2855 61 - 90 days [Member] Member eocc:SixtyOneToNinetyDaysMember
2856 91 - 120 days [Member] Member eocc:NinetyOneToOneHundredAndTwentyDaysMember
2857 121-150 days [Member] Member eocc:OneHundredTwentyOneToOneHundredFiftyDaysMember
2858 151-180 days [Member] Member eocc:OneHundredFiftyOneToOneHundredEightyDaysMember
2859 181-210 days [Member] Member eocc:OneHundredEightyOneToTwoHundredTenDaysMember
2860 211-250 days [Member] Member eocc:TwoHundredElevenToTwoHundredFiftyDaysMember
2861 More than 251 days [Member] Member eocc:MoreThanTwoHundredFiftyOneDaysMember
2862 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2863 Carrying amount [member] Member ifrs-full:CarryingAmountMember
2864 Gross Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
2865 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2866 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2867 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
2868 Trade And Other Receivables [Line Items] LineItems eocc:TradeAndOtherReceivablesLineItems
2869 Trade receivables, gross Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
2870 Allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2871 Other receivables, gross Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
2872 Total Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
2873 Trade receivables, gross Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
2874 Other receivables, gross Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
2875 Trade and other non-current receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
2876 102060 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade and Other Receivables by Type of Portfolio (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfTradeAndOtherReceivablesByTypeOfPortfolioDetail
2877 Trade And Other Receivables [Table] Table

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eocc:TradeAndOtherReceivablesTable
2878 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2879 Past due status [member] Member ifrs-full:PastDueStatusMember
2880 On demand and Non-current [Member] Member eocc:NonCurrentMember
2881 1-30 days [Member] Member eocc:OneToThirtyDaysMember
2882 31-60 days [Member] Member eocc:ThirtyOneToSixtyDaysMember
2883 61 - 90 days [Member] Member eocc:SixtyOneToNinetyDaysMember
2884 91 - 120 days [Member] Member eocc:NinetyOneToOneHundredAndTwentyDaysMember
2885 121-150 days [Member] Member eocc:OneHundredTwentyOneToOneHundredFiftyDaysMember
2886 151-180 days [Member] Member eocc:OneHundredFiftyOneToOneHundredEightyDaysMember
2887 181-210 days [Member] Member eocc:OneHundredEightyOneToTwoHundredTenDaysMember
2888 211-250 days [Member] Member eocc:TwoHundredElevenToTwoHundredFiftyDaysMember
2889 More than 251 days [Member] Member eocc:MoreThanTwoHundredFiftyOneDaysMember
2890 Classes of acquired receivables [axis] Axis ifrs-full:ClassesOfAcquiredReceivablesAxis
2891 Classes of acquired receivables [member] Member ifrs-full:ClassesOfAcquiredReceivablesMember
2892 Non-renegotiated Portfolio [Member] Member eocc:NonRenegotiatedPortfolioMember
2893 Renegotiated Portfolio [Member] Member eocc:RenegotiatedPortfolioMember
2894 Trade And Other Receivables [Line Items] LineItems eocc:TradeAndOtherReceivablesLineItems
2895 Number of Customers Concept (Integer) For Period eocc:NumberOfCustomers
2896 Gross Amount Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
2897 102070 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Provisions and Write-offs Portfolio (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfProvisionsAndWriteOffsPortfolioDetail
2898 Provisions And Writeoffs For Portfolio [Table] Table

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eocc:ProvisionsAndWriteoffsForPortfolioTable
2899 Classes of acquired receivables [axis] Axis ifrs-full:ClassesOfAcquiredReceivablesAxis
2900 Classes of acquired receivables [member] Member ifrs-full:ClassesOfAcquiredReceivablesMember
2901 Non-renegotiated Portfolio [Member] Member eocc:NonRenegotiatedPortfolioMember
2902 Renegotiated Portfolio [Member] Member eocc:RenegotiatedPortfolioMember
2903 Provisions And Writeoffs For Portfolio [Line Items] LineItems eocc:ProvisionsAndWriteoffsForPortfolioLineItems
2904 Provisions and Write-offs Concept (Monetary) For Period Debit eocc:ProvisionsAndWriteoffs
2905 102080 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Number and Value of Operations (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfNumberAndValueOfOperationsDetail
2906 Implied Table Table

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implied:Table
2907 Impairment Provisions And Recoveries [Abstract] Abstract eocc:ImpairmentProvisionsAndRecoveriesAbstract
2908 Number of operations Concept (Integer) For Period eocc:NumberOfOperationsOfImpairmentProvisionsAndRecoveries
2909 Value of operations, in ThCh$ Concept (Monetary) For Period Debit eocc:ImpairmentProvisionsAndRecoveriesAmount
2910 102090 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade Receivables by Aging (Detail) Network

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http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfTradeReceivablesByAgingDetail
2911 Trade And Other Receivables [Table] Table

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eocc:TradeAndOtherReceivablesTable
2912 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2913 Consolidated [member] Member ifrs-full:ConsolidatedMember
2914 Portfolio Stratification Member eocc:PortfolioStratificationMember
2915 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2916 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2917 Trade receivables, generation and transmission [Member] Member eocc:TradeReceivablesGenerationAndTransmissionMember
2918 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2919 Past due status [member] Member ifrs-full:PastDueStatusMember
2920 On demand [Member] Member ifrs-full:CurrentMember
2921 1-30 days [Member] Member eocc:OneToThirtyDaysMember
2922 31-60 days [Member] Member eocc:ThirtyOneToSixtyDaysMember
2923 61-90 days [Member] Member eocc:SixtyOneDaysToNinetyDaysMember
2924 91 - 120 days [Member] Member eocc:NinetyOneToOneHundredAndTwentyDaysMember
2925 121-150 days [Member] Member eocc:OneHundredTwentyOneToOneHundredFiftyDaysMember
2926 151-180 days [Member] Member eocc:OneHundredFiftyOneToOneHundredEightyDaysMember
2927 181-210 days [Member] Member eocc:OneHundredEightyOneToTwoHundredTenDaysMember
2928 211-250 days [Member] Member eocc:TwoHundredElevenToTwoHundredFiftyDaysMember
2929 More than 251 days [Member] Member eocc:MoreThanTwoHundredFiftyOneDaysMember
2930 More than 365 days [Member] Member eocc:MoreThanThreeHundredSixtyFiveDaysMember
2931 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2932 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2933 Unbilled services [Member] Member eocc:UnbilledServicesMember
2934 Services billed [Member] Member eocc:BilledServicesMember
2935 Types of customers [axis] Axis ifrs-full:TypesOfCustomersAxis
2936 Types of customers [member] Member ifrs-full:TypesOfCustomersMember
2937 Large customers [Member] Member eocc:LargeCustomersMember
2938 Others [Member] Member eocc:OtherCustomersMember
2939 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2940 Carrying amount [member] Member ifrs-full:CarryingAmountMember
2941 Gross Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
2942 Trade And Other Receivables [Line Items] LineItems eocc:TradeAndOtherReceivablesLineItems
2943 Trade receivables, gross Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
2944 Allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2945 Trade receivables, gross Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
2946 102100 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Type of Portfolio (Detail) Network

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2947 Trade And Other Receivables [Table] Table

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eocc:TradeAndOtherReceivablesTable
2948 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2949 Consolidated [member] Member ifrs-full:ConsolidatedMember
2950 By type of portfolio [Member] Member eocc:PortfolioByTypeMember
2951 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2952 Past due status [member] Member ifrs-full:PastDueStatusMember
2953 On demand [Member] Member ifrs-full:CurrentMember
2954 1-30 days [Member] Member eocc:OneToThirtyDaysMember
2955 31-60 days [Member] Member eocc:ThirtyOneToSixtyDaysMember
2956 61-90 days [Member] Member eocc:SixtyOneDaysToNinetyDaysMember
2957 91 - 120 days [Member] Member eocc:NinetyOneToOneHundredAndTwentyDaysMember
2958 121-150 days [Member] Member eocc:OneHundredTwentyOneToOneHundredFiftyDaysMember
2959 151-180 days [Member] Member eocc:OneHundredFiftyOneToOneHundredEightyDaysMember
2960 181-210 days [Member] Member eocc:OneHundredEightyOneToTwoHundredTenDaysMember
2961 211-250 days [Member] Member eocc:TwoHundredElevenToTwoHundredFiftyDaysMember
2962 More than 251 days [Member] Member eocc:MoreThanTwoHundredFiftyOneDaysMember
2963 More than 365 days [Member] Member eocc:MoreThanThreeHundredSixtyFiveDaysMember
2964 Types of customers [axis] Axis ifrs-full:TypesOfCustomersAxis
2965 Types of customers [member] Member ifrs-full:TypesOfCustomersMember
2966 Large customers [Member] Member eocc:LargeCustomersMember
2967 Others [Member] Member eocc:OtherCustomersMember
2968 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2969 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2970 Generation and Transmission [Member] Member eocc:GenerationAndTransmissionMember
2971 Trade And Other Receivables [Line Items] LineItems eocc:TradeAndOtherReceivablesLineItems
2972 Trade receivables, gross Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
2973 Trade and other non-current receivables, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivables
2974 102110 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Balance Sheet (Detail) Network

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2975 Disclosure Of Estimated Sales And Purchases Of Energy And Capacity [Table] Table

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eocc:DisclosureOfEstimatedSalesAndPurchasesOfEnergyAndCapacityTable
2976 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2977 Consolidated [member] Member ifrs-full:ConsolidatedMember
2978 Estimated Sales and Purchases of Energy and Capacity [Member] Member eocc:EstimatedSalesAndPurchasesOfEnergyAndCapacityMember
2979 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2980 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2981 Energy and Tolls [Member] Member eocc:EnergyAndCapacityMember
2982 Tolls [Member] Member eocc:TollsMember
2983 Disclosure Of Estimated Sales And Purchases Of Energy And Capacity [Line Items] LineItems eocc:DisclosureOfEstimatedSalesAndPurchasesOfEnergyAndCapacityLineItems
2984 Current accounts receivable from related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
2985 Trade and other current receivables, net Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
2986 Total Estimated Assets Concept (Monetary) As Of Debit eocc:EstimatedAssets
2987 Current accounts payable to related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
2988 Trade and other current payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
2989 Total Estimated Liabilities Concept (Monetary) As Of Credit eocc:EstimatedLiabilities
2990 102120 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Income Statement (Detail) Network

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2991 Disclosure Of Estimated Sales And Purchases Of Energy And Capacity [Table] Table

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eocc:DisclosureOfEstimatedSalesAndPurchasesOfEnergyAndCapacityTable
2992 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2993 Consolidated [member] Member ifrs-full:ConsolidatedMember
2994 Estimated Sales and Purchases of Energy and Capacity [Member] Member eocc:EstimatedSalesAndPurchasesOfEnergyAndCapacityMember
2995 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2996 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2997 Energy and Tolls [Member] Member eocc:EnergyAndCapacityMember
2998 Tolls [Member] Member eocc:TollsMember
2999 Disclosure Of Estimated Sales And Purchases Of Energy And Capacity [Line Items] LineItems eocc:DisclosureOfEstimatedSalesAndPurchasesOfEnergyAndCapacityLineItems
3000 Energy Sales Concept (Monetary) For Period Credit eocc:EnergySales
3001 Energy Purchases Concept (Monetary) For Period Debit eocc:EnergyPurchases
3002 102130 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers - Summary of Details of Due Dates of Payments to Suppliers (Detail) Network

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3003 Details Of Due Dates Of Payments To Suppliers [Table] Table

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eocc:DetailsOfDueDatesOfPaymentsToSuppliersTable
3004 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
3005 Consolidated [member] Member ifrs-full:ConsolidatedMember
3006 Details Of Due Dates Of Payments To Suppliers Member eocc:DetailsOfDueDatesOfPaymentsToSuppliersMember
3007 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
3008 Past due status [member] Member ifrs-full:PastDueStatusMember
3009 Up To Thirty Days Member eocc:UpToThirtyDaysMember
3010 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
3011 Products and services [member] Member ifrs-full:ProductsAndServicesMember
3012 Goods Member eocc:GoodsMember
3013 Services Member eocc:ServicesMember
3014 Other Member eocc:OtherMember
3015 Details Of Due Dates Of Payments To Suppliers [Line Items] LineItems eocc:DetailsOfDueDatesOfPaymentsToSuppliersLineItems
3016 Current, Trade payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers

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