B2Gold Corp. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

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

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 http://www.b2gold.com/role/DocumentAndEntityInformation
2 Implied Table Table

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 implied:Table
3 Document and Entity Information [Abstract] Abstract btg:DocumentandEntityInformationAbstract
4 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
5 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
6 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
7 Document Type Concept (Submission Type) For Period dei:DocumentType
8 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
9 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
10 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
11 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
12 Entity Common Stock, Shares Outstanding (in shares) Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
13 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
14 1001000 - Statement - CONSOLIDATED STATMENTS OF OPERATIONS Network

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 http://www.b2gold.com/role/ConsolidatedStatmentsOfOperations
15 Implied Table Table

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 implied:Table
16 Profit or loss [abstract] Abstract ifrs-full:IncomeStatementAbstract
17 Gold revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGold
18 Cost of sales Abstract btg:CostofSalesAbstract
19 Production costs (Note 19) Concept (Monetary) For Period Debit btg:ProductionExpense
20 Depreciation and depletion Concept (Monetary) For Period Debit btg:CostofSalesDepreciationandAmortisationExpense
21 Royalties and production taxes Concept (Monetary) For Period Debit btg:RoyaltyExpenseAndProductionTaxExpense
22 Total cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
23 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
24 General and administrative Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
25 Share-based payments (Note 12) Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
26 Impairment of long-lived assets, net (Note 8) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
27 Gain on sale of Lynn Lake royalty (Note 8) Concept (Monetary) For Period Credit btg:GainsLossesOnDisposalsOfNetSmelterRoyalty
28 Write-down of mineral property interests (Note 8) Concept (Monetary) For Period Debit btg:ImpairmentLossRecognisedInProfitOrLossMineralProperties
29 Provision for non-recoverable input taxes Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
30 Foreign exchange gains (losses) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
31 Other Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
32 Operating income Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
33 Unrealized gain (loss) on fair value of convertible notes (Note 10) Concept (Monetary) For Period Credit btg:GainsLossesRecognisedInProfitOrLossOnConvertibleNotesAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionOrSubsequently
34 Community relations Concept (Monetary) For Period Debit btg:CommunityRelationsExpense
35 Interest and financing expense Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
36 Realized gain (loss) on derivative instruments Concept (Monetary) For Period Credit btg:GainsLossesRecognisedInProfitOrLossOnFinancialLiabilitiesAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionOrSubsequentlyDerivativeFinancialLiability
37 Unrealized (loss) gain on derivative instruments (Note 14) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
38 Write-down of long-term investments Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
39 Other Concept (Monetary) For Period Debit btg:MiscellaneousOtherNonoperatingExpense
40 Income before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
41 Current income tax, withholding and other taxes (Note 16) Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
42 Deferred income tax (expense) recovery (Note 16) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
43 Net income for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
44 Attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
45 Net income (loss), attributable to Shareholders of the Company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
46 Net income (loss), attributable to Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
47 Earnings per share (attributable to shareholders of the Company) Abstract ifrs-full:EarningsPerShareAbstract
48 Basic (in USD per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
49 Diluted (in USD per share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
50 Weighted average number of common shares outstanding (in thousands) Abstract ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
51 Basic (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
52 Diluted (in shares) Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
53 1002000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Network

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 http://www.b2gold.com/role/ConsolidatedStatementsOfComprehensiveIncome
54 Implied Table Table

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55 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
56 Net income for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
57 Other comprehensive income Abstract ifrs-full:OtherComprehensiveIncomeAbstract
58 Impact of change in credit spread on convertible notes (Note 10) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability
59 Unrealized (loss) gain on investments, net of deferred tax expense (Note 7) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
60 Other comprehensive (loss) income for the year Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
61 Total comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
62 Other comprehensive (loss) income attributable to: Abstract btg:OtherComprehensiveIncomeAttributableToAbstract
63 Shareholders of the Company Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToOwnersOfParent
64 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToNoncontrollingInterests
65 Total comprehensive income attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
66 Shareholders of the Company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
67 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
68 1003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Network

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 http://www.b2gold.com/role/ConsolidatedStatementsOfCashFlows
69 Statement Of Cash Flows [Table] Table

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 btg:StatementOfCashFlowsTable
70 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
71 Classes Of Property, Plant And Equipment [Domain] Member btg:ClassesOfPropertyPlantAndEquipmentDomain
72 Mining property Member ifrs-full:MiningPropertyMember
73 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
74 Name Of Property [Domain] Member btg:NameOfPropertyDomain
75 Fekola Member btg:FekolaMineMember
76 Otjikoto Member btg:OtjikotoMineMember
77 Masbate Member btg:MasbateMineMember
78 Libertad Member btg:LibertadMineMember
79 Limon Member btg:LimonMineMember
80 Gramalote Member btg:GramaloteMember
81 Other Member btg:OtherMember
82 Lynn Lake Royalty Member btg:LynnLakeRoyaltyMember
83 Statement Of Cash Flows [Line Items] LineItems btg:StatementOfCashFlowsLineItems
84 Operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
85 Net income for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
86 Mine restoration provisions settled (Note 11) Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
87 Non-cash charges, net (Note 17) Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
88 Changes in non-cash working capital (Note 17) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
89 Proceeds from prepaid sales (Note 13) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
90 Changes in long-term value added tax receivables Concept (Monetary) For Period Debit btg:AdjustmentsForDecreaseIncreaseInReceivablesFromTaxesOtherThanIncomeTaxNoncurrent
91 Cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
92 Financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
93 Repayment of convertible notes (Note 10) Concept (Monetary) For Period Credit btg:RepaymentsOfConvertibleDebt1
94 Revolving credit facility, drawdowns net of transaction costs (Note 10) Concept (Monetary) For Period Debit btg:ProceedsFromLinesOfCredit1
95 Repayment of revolving credit facility (Note 10) Concept (Monetary) For Period Credit btg:RepaymentsOfLinesOfCredit1
96 Equipment loan facilities, drawdowns net of transaction costs (Note 10) Concept (Monetary) For Period Debit btg:ProceedsFromBorrowingsNetOfTransactionCostsClassifiedasFinancingActivities
97 Repayment of equipment loan facilities (Note 10) Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
98 Common shares issued for cash on exercise of stock options (Note 12) Concept (Monetary) For Period Debit ifrs-full:ProceedsFromExerciseOfOptions
99 Interest and commitment fees paid Concept (Monetary) For Period Credit btg:InterestAndCommitmentFeesPaidClassifiedAsFinancingActivities
100 Restricted cash movement Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents
101 Other Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
102 Cash (used) provided by financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
103 Investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
104 Fekola Mine, including sales proceeds net of pre-production costs Concept (Monetary) For Period Credit btg:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivitiesAndProceedsForPreproductionSalesNet
105 Expenditures on mining interests, development and sustaining capital Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
106 Expenditures on mining interests, prefeasibility and exploration and development Concept (Monetary) For Period Credit ifrs-full:PaymentsForExplorationAndEvaluationExpenses
107 Purchase of non-controlling interest Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
108 Cash proceeds from sale of Lynn Lake royalty, net of transaction costs (Note 8) Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities
109 Other Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
110 Cash used by investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
111 (Decrease) increase in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
112 Effect of exchange rate changes on cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
113 Cash and cash equivalents, beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
114 Cash and cash equivalents, end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
115 1004000 - Statement - CONSOLIDATED BALANCE SHEETS Network

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 http://www.b2gold.com/role/ConsolidatedBalanceSheets
116 Implied Table Table

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117 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
118 Assets Abstract ifrs-full:AssetsAbstract
119 Current Abstract ifrs-full:CurrentAssetsAbstract
120 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
121 Accounts receivable, prepaids and other Concept (Monetary) As Of Debit btg:ReceivablesAndOtherCurrentAssets
122 Value-added and other tax receivables Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
123 Inventories (Note 6) Concept (Monetary) As Of Debit ifrs-full:Inventories
124 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
125 Long-term investments (Note 7) Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAvailableforsale
126 Value-added tax receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentValueAddedTaxReceivables
127 Mining interests - owned by subsidiaries Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
128 Investments in joint ventures (accounted for using the equity method) Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
129 Other assets (Note 9) Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
130 Deferred income taxes (Note 16) Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
131 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
132 Liabilities Abstract ifrs-full:LiabilitiesAbstract
133 Current Abstract ifrs-full:CurrentLiabilitiesAbstract
134 Accounts payable and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
135 Current income and other taxes payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
136 Current portion of derivative instruments at fair value (Note 14) Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
137 Current portion of long-term debt (Note 10) Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
138 Current portion of prepaid sales (Note 13) Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
139 Current portion of mine restoration provisions (Note 11) Concept (Monetary) As Of Credit ifrs-full:ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts
140 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
141 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
142 Derivative instruments at fair value (Note 14) Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
143 Long-term debt (Note 10) Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
144 Prepaid sales (Note 13) Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
145 Mine restoration provisions (Note 11) Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
146 Deferred income taxes (Note 16) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
147 Employee benefits obligation Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
148 Other long-term liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
149 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
150 Equity Abstract ifrs-full:EquityAbstract
151 Shareholders’ equity Abstract btg:ShareholdersEquityAbstract
152 Share capital issued: 994,621,917 common shares (Dec 31, 2017 – 980,932,908) Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
153 Contributed surplus Concept (Monetary) As Of Credit ifrs-full:AdditionalPaidinCapital
154 Accumulated other comprehensive loss Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
155 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
156 Equity attributable to owners of parent Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
157 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
158 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
159 Total equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
160 Commitments (Note 21) Concept (Monetary) As Of Credit btg:CommitmentsAndContingencies1
161 1004001 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Network

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 http://www.b2gold.com/role/ConsolidatedBalanceSheetsParenthetical
162 Implied Table Table

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163 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
164 Common shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
165 1005000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Network

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166 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
167 Initially applied IFRSs [axis] Axis ifrs-full:InitiallyAppliedIFRSsAxis
168 Initially applied IFRSs [member] Member ifrs-full:InitiallyAppliedIFRSsMember
169 IFRS 9 Member ifrs-full:InAccordanceWithIFRS9Member
170 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
171 Equity [member] Member ifrs-full:EquityMember
172 Share capital Member ifrs-full:IssuedCapitalMember
173 Contributed surplus Member ifrs-full:AdditionalPaidinCapitalMember
174 Accumulated other comprehensive loss Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
175 Deficit Member ifrs-full:RetainedEarningsMember
176 Non- controlling interests Member ifrs-full:NoncontrollingInterestsMember
177 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
178 Beginning balance number of shares outstanding (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
179 Beginning balance equity Concept (Monetary) As Of Credit ifrs-full:Equity
180 IFRS 9 transition adjustment on January 1, 2018 (Note 3) Concept (Monetary) As Of Credit btg:IncreaseDecreaseThroughAdoptionOfNewAccountingPrinciple
181 Net income for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
182 Impact of change in credit spread on convertible notes (Note 10) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability
183 Unrealized gain (loss) on investments, net of deferred tax expense Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
184 Number of shares issued on exercise of stock options (in shares) Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
185 Shares issued on exercise of stock options (Note 12) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
186 Shares pending issuance on exercise of stock options (in shares) Concept (Decimal) For Period btg:NumberOfSharesPendingDuetoOptionsExercisedInShareBasedPaymentArrangement
187 Shares pending issuance on exercise of stock options Concept (Monetary) For Period Credit btg:PendingIncreaseDecreaseInSharesThroughExerciseOfOptionsEquity
188 Shares issued on vesting of RSUs (in shares) Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
189 Shares issued on vesting of RSUs (Note 12) Concept (Monetary) For Period Credit btg:IncreaseDecreaseThroughVestingOfRestrictedStockUnitsEquity
190 Payments received from non-controlling interest Concept (Monetary) For Period Debit ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
191 Acquisition of non-controlling interest (Note 8) Concept (Monetary) For Period Credit btg:IncreaseDecreaseThroughPurchaseofNoncontrollingInterest
192 Sale of non-controlling interest (Note 8) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
193 Net loan receivable on sale of non-controlling interest (Note 8) Concept (Monetary) For Period Debit btg:IssuanceOfLoanReceivableToNoncontrollingInterest
194 Interest on loan to non-controlling interest Concept (Monetary) For Period Credit btg:InterestIncomeOnLoanReceivableToNoncontrollingInterest
195 Shares issued for mineral property interests (in shares) Concept (Decimal) For Period btg:NumberOfSharesIssuedForMineralInterests
196 Shares issued for mineral property interest Concept (Monetary) For Period Credit btg:StockIssued
197 Shares issued for non-controlling interest (in shares) Concept (Decimal) For Period btg:NumberOfSharesIssuedForPurchaseOfNoncontrollingInterest
198 Shares issued for purchase of non-controlling interest Concept (Monetary) For Period Credit btg:IssueOfEquityPurchaseOfNoncontrollingInterest
199 Share-based payments (Note 12) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
200 Transfer to share capital on exercise of stock options Concept (Monetary) For Period Credit btg:IncreaseDecreaseThroughTransferBetweenShareCapitalAndContributedSurplusEquity
201 Ending balance number of shares outstanding (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
202 Ending balance equity Concept (Monetary) As Of Credit ifrs-full:Equity
203 2101100 - Disclosure - Nature of operations Network

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204 Implied Table Table

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205 Disclosure Of General Information About Financial Statements [Abstract] Abstract btg:DisclosureOfGeneralInformationAboutFinancialStatementsAbstract
206 Nature of operations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
207 2104100 - Disclosure - Basis of preparation Network

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208 Implied Table Table

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209 Disclosure Of Basis Of Preparation Of Financial Statements [Abstract] Abstract btg:DisclosureOfBasisOfPreparationOfFinancialStatementsAbstract
210 Basis of preparation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
211 2107100 - Disclosure - Recent accounting pronouncements Network

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212 Implied Table Table

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213 Disclosure Of Significant Accounting Policies [Abstract] Abstract btg:DisclosureOfSignificantAccountingPoliciesAbstract
214 Recent accounting pronouncements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
215 2110100 - Disclosure - Summary of significant accounting policies Network

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216 Implied Table Table

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217 Disclosure Of Significant Accounting Policies [Abstract] Abstract btg:DisclosureOfSignificantAccountingPoliciesAbstract
218 Summary of significant accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
219 2113100 - Disclosure - Significant accounting judgements and estimates Network

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220 Implied Table Table

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221 Accounting Judgements And Estimates [Abstract] Abstract btg:AccountingJudgementsAndEstimatesAbstract
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223 2116100 - Disclosure - Inventories Network

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224 Implied Table Table

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225 Inventories [Abstract] Abstract btg:InventoriesAbstract
226 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
227 2119100 - Disclosure - Long-term investments Network

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228 Implied Table Table

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229 Available-for-sale financial assets [abstract] Abstract ifrs-full:AvailableforsaleFinancialAssetsAbstract
230 Long-term investments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAvailableforsaleAssetsExplanatory
231 2122100 - Disclosure - Mining interests Network

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232 Implied Table Table

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233 Exploration And Evaluation Of Mineral Resources [Abstract] Abstract btg:ExplorationAndEvaluationOfMineralResourcesAbstract
234 Mining interests Concept (Text Block (HTML)) For Period btg:DisclosureOfMiningInterestsTextBlock
235 2125100 - Disclosure - Other assets Network

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236 Implied Table Table

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237 Other Assets1 [Abstract] Abstract btg:OtherAssets1Abstract
238 Other assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherAssetsExplanatory
239 2128100 - Disclosure - Long-term debt Network

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240 Implied Table Table

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241 Long-Term Debt1 [Abstract] Abstract btg:LongTermDebt1Abstract
242 Long-term debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingCostsExplanatory
243 2131100 - Disclosure - Mine restoration provisions Network

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244 Implied Table Table

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245 Disclosure Of Provisions [Abstract] Abstract btg:DisclosureOfProvisionsAbstract
246 Mine restoration provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
247 2134100 - Disclosure - Share capital Network

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248 Implied Table Table

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250 Share capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
251 2137100 - Disclosure - Prepaid Sales Network

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252 Implied Table Table

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253 Disclosure of deferred income [Abstract] Abstract btg:DisclosureofdeferredincomeAbstract
254 Prepaid Sales Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredIncomeExplanatory
255 2143100 - Disclosure - Derivative financial instruments Network

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256 Implied Table Table

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257 Disclosure of detailed information about financial instruments [abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
258 Derivative financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
259 2146100 - Disclosure - Financial instruments Network

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260 Implied Table Table

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262 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
263 2149100 - Disclosure - Income and other taxes Network

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264 Implied Table Table

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265 Disclosure of income tax [Abstract] Abstract btg:DisclosureofincometaxAbstract
266 Income and other taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
267 2152100 - Disclosure - Supplementary cash flow information Network

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268 Implied Table Table

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558 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
559 Discontinued operations Member ifrs-full:DiscontinuedOperationsMember
560 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
561 Business combinations [member] Member ifrs-full:BusinessCombinationsMember
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563 Central Sun Member btg:CentralSunMember
564 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
565 Name Of Property [Domain] Member btg:NameOfPropertyDomain
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567 Limon Member btg:LimonMineMember
568 Mocoa Member btg:MocoaMember
569 Fekola Member btg:FekolaMineMember
570 Masbate Member btg:MasbateMineMember
571 Lynn Lake Royalty Member btg:LynnLakeRoyaltyMember
572 Calibre Mining Corp. Member btg:CalibreMiningCorp.Member
573 Pampa Paciencia And Cerro Barco Member btg:PampaPacienciaAndCerroBarcoMember
574 Namibia and Mali Member btg:NamibiaAndMaliMember
575 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
576 Classes Of Property, Plant And Equipment [Domain] Member btg:ClassesOfPropertyPlantAndEquipmentDomain
577 Property, plant and equipment Member ifrs-full:PropertyPlantAndEquipmentMember
578 Exploration and evaluation properties (non-depletable) Member ifrs-full:ExplorationAndEvaluationAssetsMember
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580 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
581 Carrying amount [member] Member ifrs-full:CarryingAmountMember
582 Cost Member ifrs-full:GrossCarryingAmountMember
583 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
584 Proportion of ownership interest in associate Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
585 Impairment loss Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
586 Tax effect of impairment in property, plant and equipment Concept (Monetary) For Period Debit btg:TaxEffectOfReversalOfImpairmentInPropertyPlantAndEquipment
587 Impairment loss, net of tax Concept (Monetary) For Period Debit btg:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipmentNetOfTax
588 Reversal of impairment loss Concept (Monetary) For Period ifrs-full:ReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
589 Reversal of impairment loss, net of tax Concept (Monetary) For Period Credit btg:ReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipmentNetOfTax
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591 Number of shares received (in shares) Concept (Decimal) For Period btg:PortionOfConsiderationPaidReceivedConsistingOfEquitySharesShares
592 Proceeds from sale of property, plant and equipment Concept (Monetary) For Period Debit btg:PortionOfConsiderationPaidReceivedConsistingOfEquitySharesValue
593 Net smelter royalty receivable Concept (Percent) For Period btg:PortionOfConsiderationPaidReceivedConsistingOfRoyaltyAgreementPercentage
594 Net smelter royalty recognized as of acquisition date Concept (Monetary) As Of Debit btg:NetSmelterRoyaltyRecognizedAsOfAcquisitionDate
595 Proportion of ownership interests held by non-controlling interests Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
596 Reasonably possible change in price per unit (in usd per unit) Concept (Decimal) For Period btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePricePerUnit
597 Reasonably possible change in risk variable, percent Concept (Percent) For Period btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
598 Reasonably possible change in risk variable impact on property, plant and equipment Concept (Monetary) For Period Debit btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnPropertyPlantAndEquipment
599 Sales proceeds from pre-commercial production period Concept (Monetary) For Period Credit btg:RevenueOffsetAgainstCapitalizedCosts
600 Capitalized to mining interests Concept (Monetary) For Period Credit btg:ExpenseCapitalizedToMiningInterest
601 Interest expense, capitalized to mineral property interests Concept (Monetary) For Period ifrs-full:InterestCostsCapitalised
602 Percentage of ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
603 Priority dividend rate to non-controlling interest Concept (Percent) For Period btg:PriorityDividendRateNonControllingInterest
604 Consideration paid (received) Concept (Monetary) For Period Credit ifrs-full:ConsiderationPaidReceived
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606 Receivables from sale of properties Concept (Monetary) As Of Debit ifrs-full:ReceivablesFromSaleOfProperties
607 Borrowings, adjustment to interest rate basis Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
608 Acquisition of non-controlling interest (Note 8) Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
609 Reclass Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
610 Net smelter royalty Concept (Percent) For Period btg:BusinessCombinationsNetSmelterRoyalty
611 Increase (decrease) in contingent consideration asset (liability) Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInContingentConsiderationAssetLiability
612 Contingent consideration period Concept (xbrli:durationItemType) For Period btg:DisposalGroupContingentConsiderationPeriod
613 Gain on sale of Lynn Lake royalty (Note 8) Concept (Monetary) For Period Credit btg:GainsLossesOnDisposalsOfNetSmelterRoyalty
614 Write-down mineral property interests Concept (Monetary) For Period Debit btg:ImpairmentLossRecognisedInProfitOrLossMineralProperties
615 2422404 - Disclosure - Mining interests - Schedule of Fair Value Calculation Assumptions (Details) Network

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 http://www.b2gold.com/role/MiningInterestsScheduleOfFairValueCalculationAssumptionsDetails
616 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
617 Measurement Input Type [Axis] Axis btg:MeasurementInputTypeAxis
618 Measurement Input Type [Domain] Member btg:MeasurementInputTypeDomain
619 Long-term gold price Member btg:MeasurementInputLongtermGoldPriceMember
620 Silver price Member btg:MeasurementInputTypeSilverPriceMember
621 Copper Price Member btg:MeasurementInputCopperPriceMember
622 Molybdenum Price Member btg:MeasurementInputMolybdenumPriceMember
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624 Name Of Property [Domain] Member btg:NameOfPropertyDomain
625 Libertad Member btg:LibertadMineMember
626 Limon Member btg:LimonMineMember
627 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
628 Fair value inputs price per ounce (in usd per oz) Concept (Decimal) For Period btg:FairValueInputsPricePerOunce
629 Discount rate Concept (Percent) As Of ifrs-full:DiscountRateUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
630 2425402 - Disclosure - Other assets (Details) Network

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 http://www.b2gold.com/role/OtherAssetsDetails
631 Implied Table Table

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*

 implied:Table
632 Other Assets1 [Abstract] Abstract btg:OtherAssets1Abstract
633 Low-grade stockpile Concept (Monetary) As Of Debit ifrs-full:NoncurrentOreStockpiles
634 Debt service reserve account (Note 10) Concept (Monetary) As Of Debit ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
635 Loan receivable, including accrued interest Concept (Monetary) As Of Debit btg:NoncurrentLoanAndInterestReceivable
636 Reclamation deposits Concept (Monetary) As Of Debit btg:ReclamationDeposits
637 Derivative instruments at fair value (Note 14) Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
638 Other Concept (Monetary) As Of Debit btg:MiscellaneousNoncurrentOtherAssets
639 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
640 Current financial assets at fair value Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
641 2428402 - Disclosure - Long-term debt - Schedule of Long Term Debt (Details) Network

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 http://www.b2gold.com/role/LongTermDebtScheduleOfLongTermDebtDetails
642 Disclosure of detailed information about borrowings [table] Table

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*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
643 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
644 Carrying amount [member] Member ifrs-full:CarryingAmountMember
645 Principal Member ifrs-full:GrossCarryingAmountMember
646 Fair value adjustment Member btg:FairValueAdjustmentMember
647 Unamortized Transaction Costs Member btg:UnamortizedTransactionCostsMember
648 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
649 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
650 Convertible senior subordinated notes: Member btg:ConvertibleSeniorSubordinatedNotesMember
651 Revolving credit facility: Member btg:RevolvingCreditFacility1Member
652 Fekola Equipment Loan Facility Member btg:FekolaEquipmentLoanFacilityMember
653 Otjikoto equipment loan facility (net of unamortized transaction costs) Member btg:OtjikotoEquipmentLoanFacilityMember
654 Masbate Equipment Loan Facility Member btg:MasbateEquipmentLoanFacilityMember
655 Finance lease obligations Member btg:FinanceLeaseObligationsMember
656 Nicaraguan equipment loans Member btg:NicaraguanEquipmentLoansMember
657 Equipment loans/finance lease obligations: Member btg:EquipmentLoansAndFinanceLeaseObligationsMember
658 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
659 Principal Concept (Monetary) As Of Credit ifrs-full:Borrowings
660 Current portion of long-term debt Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
661 Long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
662 2428403 - Disclosure - Long-term debt - Convertible senior subordinated notes (Details) Network

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 http://www.b2gold.com/role/LongTermDebtConvertibleSeniorSubordinatedNotesDetails
663 Disclosure of detailed information about borrowings [table] Table

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*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
664 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
665 Currently stated [member] Member ifrs-full:RestatedMember
666 Increase (decrease) due to changes in accounting policy required by IFRSs Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
667 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
668 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
669 Convertible senior subordinated notes Member btg:ConvertibleSeniorSubordinatedNotesMember
670 Initially applied IFRSs [axis] Axis ifrs-full:InitiallyAppliedIFRSsAxis
671 Initially applied IFRSs [member] Member ifrs-full:InitiallyAppliedIFRSsMember
672 IFRS 9 Member ifrs-full:InAccordanceWithIFRS9Member
673 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
674 Carrying amount [member] Member ifrs-full:CarryingAmountMember
675 Principal Member ifrs-full:GrossCarryingAmountMember
676 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
677 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
678 Fixed interest rate Member ifrs-full:FixedInterestRateMember
679 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
680 Name Of Property [Domain] Member btg:NameOfPropertyDomain
681 Fekola Member btg:FekolaMineMember
682 Otjikoto Member btg:OtjikotoMineMember
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684 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
685 Convertible senior subordinated notes Member btg:ConvertibleSeniorSubordinatedNotesMember
686 Range [axis] Axis ifrs-full:RangeAxis
687 Range [Domain] Member btg:RangeDomain
688 Bottom of range Member ifrs-full:BottomOfRangeMember
689 Top of range Member ifrs-full:TopOfRangeMember
690 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
691 Principal Concept (Monetary) As Of Credit ifrs-full:Borrowings
692 Borrowings, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
693 Conversion ratio Concept (Pure) As Of btg:DebtInstrumentConvertibleConversionRatio
694 Conversion price per share (in usd per share) Concept (Share) As Of btg:DebtInstrumentConvertibleConversionRate
695 Threshold trading days Concept (xbrli:durationItemType) For Period btg:DebtInstrumentConvertibleThresholdTradingDays1
696 Threshold consecutive trading days Concept (xbrli:durationItemType) For Period btg:DebtInstrumentConvertibleThresholdConsecutiveTradingDays11
697 Percentage of conversion price Concept (Percent) For Period btg:DebtInstrumentConvertiblePercentageOfConversionPrice
698 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
699 Accumulated other comprehensive loss Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
700 Measurement period Concept (xbrli:durationItemType) For Period btg:DebtInstrumentConvertibleDebtMeasurementPeriod
701 Measurement period consecutive trading days Concept (xbrli:durationItemType) For Period btg:DebtInstrumentConvertibleDebtMeasurementPeriodConsecutiveTradingDays
702 Product of last reported sales price per common share and conversion rate Concept (Percent) For Period btg:DebtInstrumentConvertibleDebtProductOfLastReportedSalesPricePerCommonShareAndConversionRate
703 Unrealized (loss) gain on fair value of convertible notes Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedInProfitOrLossOnFinancialLiabilitiesAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionOrSubsequently
704 Interest expense, capitalized to mineral property interests Concept (Monetary) For Period ifrs-full:InterestCostsCapitalised
705 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
706 2428404 - Disclosure - Long-term debt - Revolving Credit Facilities (Details) Network

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 http://www.b2gold.com/role/LongTermDebtRevolvingCreditFacilitiesDetails
707 Disclosure of detailed information about borrowings [table] Table

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 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
708 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
709 Carrying amount [member] Member ifrs-full:CarryingAmountMember
710 Principal Member ifrs-full:GrossCarryingAmountMember
711 Borrowing Installment [Axis] Axis btg:BorrowingInstallmentAxis
712 Borrowing Installment [Domain] Member btg:BorrowingInstallmentDomain
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714 Tranche 2 Member btg:Tranche2Member
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716 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
717 Name Of Property [Domain] Member btg:NameOfPropertyDomain
718 Fekola Member btg:FekolaMineMember
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720 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
721 Entering into significant commitments or contingent liabilities Member ifrs-full:EnteringIntoSignificantCommitmentsOrContingentLiabilitiesMember
722 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
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725 EURIBOR Member btg:EuropeanInterbankOfferedRateEURIBORMember
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734 Otjikoto Equipment Loan Facility Member btg:OtjikotoEquipmentLoanFacilityMember
735 Masbate Equipment Loan Facility Member btg:MasbateEquipmentLoanFacilityMember
736 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
737 Line of credit facility, maximum borrowing capacity Concept (Monetary) As Of Credit btg:LineOfCreditFacilityMaximumBorrowingCapacity1
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740 Borrowings, adjustment to interest rate basis Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
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745 Undrawn borrowing facilities Concept (Monetary) As Of Credit ifrs-full:UndrawnBorrowingFacilities
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749 Equipment loan facility, drawdowns net of transaction costs (Note 10) Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
750 Equipment loan facilities, drawdowns net of transaction costs (Note 10) Concept (Monetary) For Period Debit btg:ProceedsFromBorrowingsNetOfTransactionCostsClassifiedasFinancingActivities
751 Mandatory reserve deposit payment coverage period Concept (xbrli:durationItemType) For Period btg:MandatoryReserveDepositPaymentCoveragePeriod
752 Debt service reserve account Concept (Monetary) As Of Debit ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
753 Number of quarterly installment payments Concept (Integer) For Period btg:BorrowingsNumberOfQuarterlyInstallmentPayments
754 Commitment fee initial payment period Concept (xbrli:durationItemType) For Period btg:BorrowingsCommitmentFeeInitialPaymentPeriod
755 Additional commitment fee percentage Concept (Percent) As Of btg:BorrowingsAdditionalCommitmentFeePercentage
756 2428405 - Disclosure - Long-term debt - Schedule of Long-Term Debt Maturities (Details) Network

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 http://www.b2gold.com/role/LongTermDebtScheduleOfLongTermDebtMaturitiesDetails
757 Disclosure of detailed information about borrowings [table] Table

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*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
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759 Carrying amount [member] Member ifrs-full:CarryingAmountMember
760 Principal Member ifrs-full:GrossCarryingAmountMember
761 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
762 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
763 Convertible senior subordinated notes Member btg:ConvertibleSeniorSubordinatedNotesMember
764 Revolving credit facility: Member btg:RevolvingCreditFacility1Member
765 Fekola Equipment Loan Facility Member btg:FekolaEquipmentLoanFacilityMember
766 Otjikoto Equipment Loan Facility Member btg:OtjikotoEquipmentLoanFacilityMember
767 Masbate Equipment Loan Facility Member btg:MasbateEquipmentLoanFacilityMember
768 Finance lease obligations Member btg:FinanceLeaseObligationsMember
769 Nicaraguan equipment loans Member btg:NicaraguanEquipmentLoansMember
770 Maturity [axis] Axis ifrs-full:MaturityAxis
771 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
772 2019 Member ifrs-full:NotLaterThanOneYearMember
773 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
774 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
775 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
776 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
777 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
778 Principal Concept (Monetary) As Of Credit ifrs-full:Borrowings
779 Interest Concept (Monetary) As Of Credit btg:EstimatedInterestPayable
780 Principal and interest payable Concept (Monetary) As Of Credit btg:BorrowingsAndInterestPayable
781 2431402 - Disclosure - Mine restoration provisions - Narrative (Details) Network

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 http://www.b2gold.com/role/MineRestorationProvisionsNarrativeDetails
782 Disclosure of fair value measurement of assets [table] Table

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 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
783 Range [axis] Axis ifrs-full:RangeAxis
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785 Bottom of range Member ifrs-full:BottomOfRangeMember
786 Top of range Member ifrs-full:TopOfRangeMember
787 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
788 Discount rate Concept (Percent) For Period ifrs-full:InterestRateSignificantUnobservableInputsLiabilities
789 Inflation rate Concept (Percent) For Period btg:InflationRateSignificantUnobservableInputsLiabilities
790 Current estimate to settle mine restoration provisions Concept (Monetary) For Period ifrs-full:CurrentEstimateOfFutureCashOutflowsToBePaidToFulfilObligationSignificantUnobservableInputsLiabilities
791 2431403 - Disclosure - Mine restoration provisions - Schedule of Mine Restoration Provisions (Details) Network

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 http://www.b2gold.com/role/MineRestorationProvisionsScheduleOfMineRestorationProvisionsDetails
792 Disclosure of other provisions [table] Table

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 ifrs-full:DisclosureOfOtherProvisionsTable
793 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
794 Other provisions [member] Member ifrs-full:OtherProvisionsMember
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796 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
797 Reconciliation of changes in other provisions [abstract] Abstract ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
798 Balance, beginning of year Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
799 Reclamation spending Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
800 Accretion expense Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions
801 Change in obligation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInExistingProvisionsOtherProvisions
802 Balance, end of year Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
803 Current portion of mine restoration provisions Concept (Monetary) As Of Credit ifrs-full:ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts
804 Non-current portion of mine restoration provisions Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
805 2434402 - Disclosure - Share capital - Narrative (Details) Network

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 http://www.b2gold.com/role/ShareCapitalNarrativeDetails
806 Disclosure of classes of share capital [table] Table

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 ifrs-full:DisclosureOfClassesOfShareCapitalTable
807 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
808 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
809 Major ordinary share transactions Member ifrs-full:MajorOrdinaryShareTransactionsMember
810 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
811 Equity [member] Member ifrs-full:EquityMember
812 Share capital Member ifrs-full:IssuedCapitalMember
813 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
814 Share capital Member ifrs-full:ClassesOfShareCapitalMember
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816 Preference shares Member ifrs-full:PreferenceSharesMember
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818 Vesting1 [Domain] Member btg:Vesting1Domain
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820 Vesting 2 years from grant Member btg:Tranche2Member
821 Vesting 3 years from grant Member btg:Tranche3Member
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823 Range [Domain] Member btg:RangeDomain
824 Bottom of range Member ifrs-full:BottomOfRangeMember
825 Top of range Member ifrs-full:TopOfRangeMember
826 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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829 Stock Options Member btg:StockOptionsMember
830 Restricted Share Units Member btg:RestrictedShareUnitsRSUMember
831 Deferred Share Unit Member btg:DeferredShareUnitMember
832 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
833 Number of shares outstanding (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
834 Number of shares held in trust under the Company's Incentive Plan (in shares) Concept (Shares) As Of ifrs-full:SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
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838 Shares issued under At-The-Market offering (in shares) Concept (Decimal) For Period btg:NumberOfSharesIssuedIssueOfEquity
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840 Transaction costs Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
841 Share-based payments expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
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843 Exercise price, share options granted (in Cdn.$per share) Concept (Monetary) For Period ifrs-full:ExercisePriceShareOptionsGranted
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847 Risk free annual interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
848 Expected option life (in years) Concept (Decimal) For Period ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
849 Expected volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
850 Dividend yield rate Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
851 Share-based payments expense, capitalized to mining interests Concept (Monetary) For Period Debit btg:ExpenseFromShareBasedPaymentTransactionsWithEmployeesCapitalizedToMiningInterests
852 Weighted average share price for share options exercised during period at date of exercise (in Cdn.$per share) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise
853 Measurement period Concept (xbrli:durationItemType) For Period btg:ShareCapitalShareBasedCompensationMeasurementPeriod
854 Number of units granted (in shares) Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
855 Award vesting percent Concept (Percent) For Period btg:SharebasedCompensationBySharebasedPaymentAwardOtherEquityInstrumentsPortionVestingPercent
856 2434403 - Disclosure - Share capital - Stock Options Rollforward (Details) Network

*

*

 http://www.b2gold.com/role/ShareCapitalStockOptionsRollforwardDetails
857 Implied Table Table

*

*

 implied:Table
858 Disclosure of share capital, reserves and other equity interest [Abstract] Abstract btg:DisclosureofsharecapitalreservesandotherequityinterestAbstract
859 Number of outstanding options, beginning of year (in shares) Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
860 Number of options granted (in shares) Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
861 Number of options exercised (in shares) Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
862 Number of options forfeited (in shares) Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
863 Number of outstanding options, ending of year (in shares) Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
864 Weighted-average exercise price, beginning of year (in Cdn.$per share) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
865 Weighted average exercise price, options granted (in Cdn.$per share) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
866 Weighted average exercise price, options exercised (in Cdn.$per share) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
867 Weighted average exercise price, options forfeited (in Cdn.$per share) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
868 Weighted-average exercise price, end of year (in Cdn.$per share) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
869 2434404 - Disclosure - Share capital - Stock Option Range of Exercise Prices and Weighted Average Years to Expiration (Details) Network

*

*

 http://www.b2gold.com/role/ShareCapitalStockOptionRangeOfExercisePricesAndWeightedAverageYearsToExpirationDetails
870 Disclosure of number and weighted average remaining contractual life of outstanding share options [table] Table

*

*

 ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsTable
871 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
872 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
873 1.12 – 1.99 Member btg:ExercisePriceRangeTwoMember
874 2.00 – 2.99 Member btg:ExercisePriceRangeThreeMember
875 3.00 – 3.99 Member btg:ExercisePriceRangeFourMember
876 4.00 – 4.99 Member btg:ExercisePriceRangeFiveMember
877 Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] LineItems ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems
878 Number of outstanding options (in shares) Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
879 Weighted- average years to expiry (in years) Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
880 Weighted-average exercise price (in Cdn.$per share) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
881 Number of exercisable options (in shares) Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
882 Weighted-average exercise price (in Cdn.$per share) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
883 2434404 - Disclosure - Share capital - Stock Option Range of Exercise Prices and Weighted Average Years to Expiration (Details) Network

*

*

 http://www.b2gold.com/role/ShareCapitalStockOptionRangeOfExercisePricesAndWeightedAverageYearsToExpirationDetails
884 Disclosure of range of exercise prices of outstanding share options [table] Table

*

*

 ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable
885 Range [axis] Axis ifrs-full:RangeAxis
886 Range [Domain] Member btg:RangeDomain
887 Bottom of range Member ifrs-full:BottomOfRangeMember
888 Top of range Member ifrs-full:TopOfRangeMember
889 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
890 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
891 1.12 – 1.99 Member btg:ExercisePriceRangeTwoMember
892 2.00 – 2.99 Member btg:ExercisePriceRangeThreeMember
893 3.00 – 3.99 Member btg:ExercisePriceRangeFourMember
894 4.00 – 4.99 Member btg:ExercisePriceRangeFiveMember
895 Disclosure of range of exercise prices of outstanding share options [line items] LineItems ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems
896 Exercise price of outstanding options (in Cdn.$per share) Concept (Monetary) As Of ifrs-full:ExercisePriceOfOutstandingShareOptions
897 2434405 - Disclosure - Share capital - Non-Option Equity Instruments Rollforward (Details) Network

*

*

 http://www.b2gold.com/role/ShareCapitalNonOptionEquityInstrumentsRollforwardDetails
898 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
899 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
900 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
901 Restricted Share Units Member btg:RestrictedShareUnitsRSUMember
902 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
903 Number of outstanding units, beginning of year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
904 Number of units granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
905 Number of units vested and converted to common shares Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
906 Number of outstanding units, end of year Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
907 2434406 - Disclosure - Share capital - Earnings Per Share (Details) Network

*

*

 http://www.b2gold.com/role/ShareCapitalEarningsPerShareDetails
908 Implied Table Table

*

*

 implied:Table
909 Disclosure of share capital, reserves and other equity interest [Abstract] Abstract btg:DisclosureofsharecapitalreservesandotherequityinterestAbstract
910 Profit (loss), attributable to owners of parent Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
911 Dilutive impact of gain on fair value of convertible notes Concept (Monetary) For Period Debit btg:AdjustmentToProfitLossForGainOnFairValueOfConvertibleNotes
912 Diluted net income for the year (attributable to shareholders of the Company) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
913 Basic weighted average number of shares outstanding (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
914 Effect of dilutive convertible notes (in shares) Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
915 Effect of dilutive securities, stock options (in shares) Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
916 Effect of dilutive securities, restricted share units (in shares) Concept (Shares) For Period btg:DilutiveEffectOfRestrictedStockUnitsOnNumberOfOrdinaryShares
917 Diluted weighted average number of shares outstanding (in shares) Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
918 Earnings (loss) per share (attributable to Shareholders of the Company), Basic (in USD per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
919 Earnings (loss) per share (attributable to Shareholders of the Company), Diluted (in USD per share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
920 2437401 - Disclosure - Prepaid Sales (Details) Network

*

*

 http://www.b2gold.com/role/PrepaidSalesDetails
921 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

 ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
922 Gold Delivery Commitments And Contracts [Axis] Axis btg:GoldDeliveryCommitmentsAndContractsAxis
923 Gold Delivery Commitments And Contracts [Domain] Member btg:GoldDeliveryCommitmentsAndContractsDomain
924 2016 Gold Delivery Contracts Member btg:A2016GoldDeliveryContractsMember
925 2017 Gold Delivery Contract Member btg:A2017GoldDeliveryContractMember
926 2016 and 2017 Gold Delivery Contracts Member btg:A2016and2017GoldDeliveryContractsMember
927 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
928 Products and services [member] Member ifrs-full:ProductsAndServicesMember
929 Gold and Silver Ores Member sic:Z1040
930 Timing of transfer of goods or services [axis] Axis ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
931 Timing of transfer of goods or services [member] Member ifrs-full:TimingOfTransferOfGoodsOrServicesMember
932 2018 Member btg:Tranche1Member
933 2019 Member btg:Tranche2Member
934 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
935 Proceeds from prepaid sales Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
936 Prepaid sales contract volume Concept (num:massItemType) As Of btg:GoldDeliveryCommitmentsAndContractsRemainingContractualVolume
937 Prepaid sales volume delivered Concept (num:massItemType) For Period btg:GoldDeliveryCommitmentsAndContractsContractualVolumeDelivered
938 Deferred revenue earned Concept (Monetary) For Period Credit btg:GoldDeliveryCommitmentsAndContractsDeferredRevenueEarned
939 Deferred income Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
940 2443402 - Disclosure - Derivative financial instruments - Gold forwards narrative (Details) Network

*

*

 http://www.b2gold.com/role/DerivativeFinancialInstrumentsGoldForwardsNarrativeDetails
941 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
942 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
943 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
944 Forward contracts Member ifrs-full:ForwardContractMember
945 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
946 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
947 Forward contracts Member ifrs-full:ForwardContractMember
948 Hedging Designation [axis] Axis btg:HedgingDesignation1Axis
949 Hedging Designation [Domain] Member btg:HedgingDesignation1Domain
950 Not Designated As Hedging Instrument Member btg:NotDesignatedAsHedgingInstrumentMember
951 Derivative instrument [Axis] Axis btg:DerivativeinstrumentAxis
952 Derivative instrument [Domain] Member btg:DerivativeinstrumentDomain
953 Novated Contracts Under Old RCF Member btg:NovatedContractsUnderOldRCFMember
954 Gold Forward Contracts Otjikoto Mine Member btg:GoldForwardContractsOtjikotoMineMember
955 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
956 Financial liabilities, at fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
957 Unrealized gain (loss) on derivative instruments Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
958 Gold forward contracts (in ounces) Concept (num:massItemType) As Of btg:DerivativeNonmonetaryNotionalAmountMass1
959 Average price per ounce (rand) Concept (Decimal) As Of btg:AverageExercisePriceOfDerivativeInstrument
960 2443403 - Disclosure - Derivative financial instruments - Forward Contracts, Fuel Oil, Gas Oil, Diesel Narrative (Details) Network

*

*

 http://www.b2gold.com/role/DerivativeFinancialInstrumentsForwardContractsFuelOilGasOilDieselNarrativeDetails
961 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
962 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
963 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
964 Entering into significant commitments or contingent liabilities Member ifrs-full:EnteringIntoSignificantCommitmentsOrContingentLiabilitiesMember
965 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
966 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
967 Forward contracts Member ifrs-full:ForwardContractMember
968 Hedging Designation [axis] Axis btg:HedgingDesignation1Axis
969 Hedging Designation [Domain] Member btg:HedgingDesignation1Domain
970 Not Designated As Hedging Instrument Member btg:NotDesignatedAsHedgingInstrumentMember
971 Derivative instrument [Axis] Axis btg:DerivativeinstrumentAxis
972 Derivative instrument [Domain] Member btg:DerivativeinstrumentDomain
973 Forward – fuel oil: Member btg:FuelOilForwardContractMember
974 Forward – gas oil: Member btg:GasOilForwardContractMember
975 Forward – diesel: Member btg:DieselForwardContractMember
976 Fuel derivative contracts Member btg:FuelOilGasOilandDieselForwardContractsMember
977 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
978 Forward fuel contracts Concept (num:volumeItemType) As Of btg:DerivativeNonmonetaryNotionalAmountVolume1
979 Unrealized (loss) gain on derivative instruments (Note 14) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
980 Financial assets, at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
981 Average price per litre (in usd per litre) Concept (Decimal) As Of btg:AverageExercisePriceOfDerivativeInstrument
982 2443404 - Disclosure - Derivative financial instruments - Schedule of Forward Contracts, Fuel Oil, Gas Oil and Diesel (Details) Network

*

*

 http://www.b2gold.com/role/DerivativeFinancialInstrumentsScheduleOfForwardContractsFuelOilGasOilAndDieselDetails
983 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
984 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
985 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
986 Forward contracts Member ifrs-full:ForwardContractMember
987 Maturity [axis] Axis ifrs-full:MaturityAxis
988 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
989 2019 Member btg:NextTwelveMonthsMember
990 2020 Member btg:YearTwoMember
991 Total Member btg:A20172019Member
992 Derivative instrument [Axis] Axis btg:DerivativeinstrumentAxis
993 Derivative instrument [Domain] Member btg:DerivativeinstrumentDomain
994 Forward – fuel oil: Member btg:FuelOilForwardContractMember
995 Forward – gas oil: Member btg:GasOilForwardContractMember
996 Forward – diesel: Member btg:DieselForwardContractMember
997 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
998 Forward fuel contracts Concept (num:volumeItemType) As Of btg:DerivativeNonmonetaryNotionalAmountVolume1
999 Average price per litre (in usd per litre) Concept (Decimal) As Of btg:AverageExercisePriceOfDerivativeInstrument
1000 2443405 - Disclosure - Derivative financial instruments - Interest Rate Swaps (Details) Network

*

*

 http://www.b2gold.com/role/DerivativeFinancialInstrumentsInterestRateSwapsDetails
1001 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1002 Range [axis] Axis ifrs-full:RangeAxis
1003 Range [Domain] Member btg:RangeDomain
1004 Bottom of range Member ifrs-full:BottomOfRangeMember
1005 Top of range Member ifrs-full:TopOfRangeMember
1006 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1007 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1008 Entering into significant commitments or contingent liabilities Member ifrs-full:EnteringIntoSignificantCommitmentsOrContingentLiabilitiesMember
1009 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
1010 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
1011 Swap contract Member ifrs-full:SwapContractMember
1012 Hedging Designation [axis] Axis btg:HedgingDesignation1Axis
1013 Hedging Designation [Domain] Member btg:HedgingDesignation1Domain
1014 Not Designated As Hedging Instrument Member btg:NotDesignatedAsHedgingInstrumentMember
1015 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1016 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1017 Swap contract Member ifrs-full:SwapContractMember
1018 Derivative instrument [Axis] Axis btg:DerivativeinstrumentAxis
1019 Derivative instrument [Domain] Member btg:DerivativeinstrumentDomain
1020 Interest rate swaps Member ifrs-full:InterestRateSwapContractMember
1021 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1022 Notional amount of interest rate swaps Concept (Monetary) As Of invest:DerivativeNotionalAmount
1023 Derivative fixed interest rate Concept (Percent) As Of btg:DerivativeFixedInterestRate1
1024 Financial assets, at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1025 2446402 - Disclosure - Financial instruments - Schedule of Assets and Liabilities measured at Fair Value (Details) Network

*

*

 http://www.b2gold.com/role/FinancialInstrumentsScheduleOfAssetsAndLiabilitiesMeasuredAtFairValueDetails
1026 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Table

*

*

 btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable
1027 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1028 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1029 Fuel derivative contracts (Note 14) Member btg:FuelOilGasOilandDieselForwardContractsMember
1030 Convertible senior subordinated notes (Note 10) Member btg:ConvertibleSeniorSubordinatedNotesMember
1031 Gold forward contracts (Note 14) Member btg:GoldFowardContractsMember
1032 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1033 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1034 Long-term investments (Note 7) Member ifrs-full:EquityInvestmentsMember
1035 Fuel derivative contracts (Note 14) Member btg:FuelOilGasOilandDieselForwardContractsMember
1036 Interest rate swaps (Note 14) Member ifrs-full:InterestRateSwapContractMember
1037 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1038 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1039 Level 1 Member ifrs-full:Level1OfFairValueHierarchyMember
1040 Level 2 Member ifrs-full:Level2OfFairValueHierarchyMember
1041 Level 3 Member ifrs-full:Level3OfFairValueHierarchyMember
1042 Measurement [axis] Axis ifrs-full:MeasurementAxis
1043 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1044 Recurring fair value measurement Member ifrs-full:RecurringFairValueMeasurementMember
1045 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] LineItems btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems
1046 Assets measured at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1047 Liabilities measured at fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1048 2446403 - Disclosure - Financial instruments - Narrative (Details) Network

*

*

 http://www.b2gold.com/role/FinancialInstrumentsNarrativeDetails
1049 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Table

*

*

 btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable
1050 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1051 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1052 Principal Member ifrs-full:GrossCarryingAmountMember
1053 Derivative instrument [Axis] Axis btg:DerivativeinstrumentAxis
1054 Derivative instrument [Domain] Member btg:DerivativeinstrumentDomain
1055 Fuel derivative contracts Member btg:FuelOilGasOilandDieselForwardContractsMember
1056 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
1057 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
1058 Nicaraguan Cordoba Versus United States Dollar Member btg:NicaraguanCordobaVersusUnitedStatesDollarMember
1059 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1060 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1061 Fuel derivative contracts Member btg:FuelOilGasOilandDieselForwardContractsMember
1062 Gold forward contracts (Note 14) Member btg:GoldFowardContractsMember
1063 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1064 Risks [member] Member ifrs-full:TypesOfRisksMember
1065 Currency risk Member ifrs-full:CurrencyRiskMember
1066 Commodity price risk Member ifrs-full:CommodityPriceRiskMember
1067 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1068 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1069 Revolving credit facility: Member btg:RevolvingCreditFacility1Member
1070 Fekola Equipment Loan Facility Member btg:FekolaEquipmentLoanFacilityMember
1071 Masbate Equipment Loan Facility Member btg:MasbateEquipmentLoanFacilityMember
1072 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] LineItems btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems
1073 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1074 Cash flows from (used in) operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
1075 Line of credit facility, maximum borrowing capacity Concept (Monetary) As Of Credit btg:LineOfCreditFacilityMaximumBorrowingCapacity1
1076 Borrowings outstanding Concept (Monetary) As Of Credit ifrs-full:Borrowings
1077 Undrawn borrowing facilities Concept (Monetary) As Of Credit ifrs-full:UndrawnBorrowingFacilities
1078 Change in foreign currency value Concept (Percent) As Of btg:IncreaseDecreaseInForeignCurrencyValue
1079 Risk exposure associated with instruments sharing characteristic Concept (Monetary) As Of ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
1080 Reasonably possible change in risk variable, percent Concept (Percent) For Period btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
1081 Sensitivity analysis for types of market risk, reasonably possible change in risk variable, impact on cash and cash equivalents Concept (Monetary) For Period Debit btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnCashAndCashEquivalents
1082 Sensitivity analysis for types of market risk, reasonably possible change in risk variable, impact on financial liabilities Concept (Monetary) For Period Credit btg:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnFinancialLiabilities
1083 2446404 - Disclosure - Financial instruments - Schedule of Liquidity Risk (Details) Network

*

*

 http://www.b2gold.com/role/FinancialInstrumentsScheduleOfLiquidityRiskDetails
1084 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] Table

*

*

 btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable
1085 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1086 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1087 Accounts Payable, Derivative Liabilities, Borrowings, and Interest on Borrowings Member btg:AccountsPayableDerivativeLiabilitiesBorrowingsAndInterestOnBorrowingsMember
1088 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1089 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1090 Principal Member ifrs-full:GrossCarryingAmountMember
1091 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1092 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1093 Revolving credit facility: Member btg:RevolvingCreditFacility1Member
1094 Fekola Equipment Loan Facility Member btg:FekolaEquipmentLoanFacilityMember
1095 Otjikoto Equipment Loan Facility Member btg:OtjikotoEquipmentLoanFacilityMember
1096 Masbate Equipment Loan Facility Member btg:MasbateEquipmentLoanFacilityMember
1097 Finance lease obligations Member btg:FinanceLeaseObligationsMember
1098 Nicaraguan equipment loans Member btg:NicaraguanEquipmentLoansMember
1099 Maturity [axis] Axis ifrs-full:MaturityAxis
1100 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1101 2019 Member ifrs-full:NotLaterThanOneYearMember
1102 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1103 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1104 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1105 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1106 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] LineItems btg:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems
1107 Accounts payable and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
1108 Derivative liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1109 Principal Concept (Monetary) As Of Credit ifrs-full:Borrowings
1110 Interest (estimated) Concept (Monetary) As Of Credit btg:EstimatedInterestPayable
1111 Debt repayments Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1112 Operating lease commitments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1113 Capital expenditure commitments Concept (Monetary) As Of Credit ifrs-full:CapitalCommitments
1114 Mine restoration provision Concept (Monetary) As Of Credit ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCosts
1115 Employee future benefits Concept (Monetary) As Of Credit ifrs-full:ProvisionsForEmployeeBenefits
1116 Other liabilities Concept (Monetary) As Of Credit ifrs-full:OtherLiabilities
1117 2449402 - Disclosure - Income and other taxes - Schedule of components of income and other taxes (Details) Network

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*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfComponentsOfIncomeAndOtherTaxesDetails
1118 Implied Table Table

*

*

 implied:Table
1119 Disclosure of income tax [Abstract] Abstract btg:DisclosureofincometaxAbstract
1120 Reconciliation of accounting profit multiplied by applicable tax rates [abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
1121 Consolidated income before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1122 Canadian federal and provincial income tax rates Concept (Percent) For Period ifrs-full:ApplicableTaxRate
1123 Income tax expense at statutory rates Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
1124 Effects of different foreign statutory tax rates and tax holidays Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
1125 Non-deductible expenditures Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
1126 Losses for which no tax benefit has been recorded Concept (Monetary) For Period Debit btg:TaxEffectOfLossesForWhichNoTaxBenefitIsRecorded
1127 Benefit of optional tax deductions Concept (Monetary) For Period Credit btg:TaxEffectOfOptionalDeductions
1128 Benefit of optional tax deductions Concept (Monetary) For Period Debit btg:TaxEffectOfTaxHolidayExtension
1129 Withholding tax Concept (Monetary) For Period Debit btg:TaxEffectOfWithholdingTax
1130 Minimum tax Concept (Monetary) For Period Debit btg:TaxEffectOfMinimumTax
1131 Change due to foreign exchange Concept (Monetary) For Period Debit btg:TaxEffectOfForeignExchangeRates
1132 Change in accruals for tax audits Concept (Monetary) For Period Debit btg:TaxEffectOfChangesInAccrualsForTaxAudits
1133 Changes in estimates of deferred tax assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
1134 Non-deductible portion of gains Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
1135 Amounts under provided for in prior years Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
1136 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1137 Current tax expense (income) and adjustments for current tax of prior periods Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
1138 Deferred income tax (expense) recovery (Note 16) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1139 2449403 - Disclosure - Income and other taxes - Narrative (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesNarrativeDetails
1140 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
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1148 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
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1150 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1151 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1152 Capital Losses Member btg:CapitalLossesMember
1153 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1154 Income tax relating to priority dividend Concept (Monetary) For Period Debit btg:IncomeTaxRelatingToPriorityDividend
1155 Priority dividend rate to non-controlling interest Concept (Percent) For Period btg:PriorityDividendRateNonControllingInterest
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1157 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefund
1158 2449404 - Disclosure - Income and other taxes - Schedule of Income and Other Taxes by Geography (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfIncomeAndOtherTaxesByGeographyDetails
1159 Income Tax [Table] Table

*

*

 btg:IncomeTaxTable
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1167 Other Member btg:OtherMember
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1169 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1170 2449405 - Disclosure - Income and other taxes - Schedule of Deferred Income Tax Liabilities and Deferred Tax Expense (Recovery) (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfDeferredIncomeTaxLiabilitiesAndDeferredTaxExpenseRecoveryDetails
1171 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1172 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1173 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1174 Operating loss carry-forwards Member ifrs-full:UnusedTaxLossesMember
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1181 Deferred tax (liabilities)/assets Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1182 Deferred income tax expense/(recovery) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1183 Deferred tax charged to equity Concept (Monetary) For Period ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
1184 2449406 - Disclosure - Income and other taxes - Schedule of Deferred Income Tax Assets and Liabilities (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesDetails
1185 Implied Table Table

*

*

 implied:Table
1186 Disclosure of income tax [Abstract] Abstract btg:DisclosureofincometaxAbstract
1187 Deferred tax asset Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1188 Deferred tax liability Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1189 Total deferred tax liability (asset) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1190 2449407 - Disclosure - Income and other taxes - Schedule of Unrecognized Deferred Tax Assets (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfUnrecognizedDeferredTaxAssetsDetails
1191 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1192 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1193 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1194 Capital and non-capital tax losses Member btg:CapitalAndNonCapitalTaxLossRelatedTemporaryDifferencesMember
1195 Current assets Member btg:CurrentAssetsRelatedTemporaryDifferencesMember
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1198 Mining interests and other Member btg:MiningInterestAndOtherRelatedTemporaryDifferencesMember
1199 Long term debt Member btg:DebtRelatedTemporaryDifferencesMember
1200 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1201 Unrecognized deferred tax assets Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1202 2449408 - Disclosure - Income and other taxes - Reconciliation of Deferred Taxes (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesReconciliationOfDeferredTaxesDetails
1203 Implied Table Table

*

*

 implied:Table
1204 Disclosure of income tax [Abstract] Abstract btg:DisclosureofincometaxAbstract
1205 Beginning balance deferred tax liability (asset) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1206 Deferred tax expense (income) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1207 Amount charged to OCI Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1208 Net change in deferred taxes Concept (Monetary) For Period Debit btg:NetChangeInDeferredTaxes
1209 Ending balance deferred tax liability (asset) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1210 2449409 - Disclosure - Income and other taxes - Schedule of Unrecognized Tax Losses (Details) Network

*

*

 http://www.b2gold.com/role/IncomeAndOtherTaxesScheduleOfUnrecognizedTaxLossesDetails
1211 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1212 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1213 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
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1215 Colombia Member country:CO
1216 Nicaragua Member country:NI
1217 Maturity [axis] Axis ifrs-full:MaturityAxis
1218 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
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1220 2020 Member btg:A2020Member
1221 2027 Member btg:A2027Member
1222 2028 Member btg:A2028Member
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1226 2032 Member btg:A2032Member
1227 2033 Member btg:A2033Member
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1230 2036 Member btg:A2036Member
1231 2037 Member btg:A2037Member
1232 2038 Member btg:A2038Member
1233 No Expiration Member btg:NoExpirationMember
1234 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1235 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1236 2452402 - Disclosure - Supplementary cash flow information - Non-cash (credits) charges (Details) Network

*

*

 http://www.b2gold.com/role/SupplementaryCashFlowInformationNonCashCreditsChargesDetails
1237 Implied Table Table

*

*

 implied:Table
1238 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
1239 Depreciation and depletion Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
1240 Delivery into prepaid sales (Note 13) Concept (Monetary) For Period Credit btg:GoldDeliveryCommitmentsAndContractsDeferredRevenueEarned
1241 Share-based payments (Note 12) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
1242 Impairment of long-lived assets, net (Note 8) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1243 Gain on sale of Lynn Lake royalty (Note 8) Concept (Monetary) For Period Credit btg:GainsLossesOnDisposalsOfNetSmelterRoyalty
1244 Write-down of mineral property interests (Note 8) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossExplorationAndEvaluationAssets
1245 Provision for non-recoverable input taxes Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
1246 Unrealized (gain) loss on fair value of convertible notes (Note 10) Concept (Monetary) For Period Credit btg:GainsLossesRecognisedInProfitOrLossOnConvertibleNotesAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionOrSubsequently
1247 Interest and financing expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1248 Unrealized loss (gain) on derivative instruments (Note 14) Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives
1249 Write-down of long-term investments Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
1250 Deferred income tax expense (recovery) (Note 16) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxExpense
1251 Other Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsToReconcileProfitLoss
1252 Non-cash (credits) charges Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
1253 2452403 - Disclosure - Supplementary cash flow information - Changes in non-cash working capital (Details) Network

*

*

 http://www.b2gold.com/role/SupplementaryCashFlowInformationChangesInNonCashWorkingCapitalDetails
1254 Implied Table Table

*

*

 implied:Table
1255 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
1256 Accounts receivable and prepaids Concept (Monetary) For Period Debit btg:AdjustmentsForDecreaseIncreaseInReceivablesAndOtherCurrentAssets
1257 Value-added and other tax receivables Concept (Monetary) For Period Debit btg:AdjustmentsForDecreaseIncreaseInReceivablesFromTaxesOtherThankIncomeTaxCurrent
1258 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
1259 Accounts payable and accrued liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
1260 Current income and other taxes payable Concept (Monetary) For Period Debit btg:AdjustmentsForIncreaseDecreaseInCurrentTaxLiabilitiesCurrent
1261 Changes in non-cash working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
1262 2452404 - Disclosure - Supplementary cash flow information - Other exploration and development (Details) Network

*

*

 http://www.b2gold.com/role/SupplementaryCashFlowInformationOtherExplorationAndDevelopmentDetails
1263 Statement Of Cash Flows [Table] Table

*

*

 btg:StatementOfCashFlowsTable
1264 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
1265 Name Of Property [Domain] Member btg:NameOfPropertyDomain
1266 Fekola Member btg:FekolaMineMember
1267 Otjikoto Member btg:OtjikotoMineMember
1268 Masbate Member btg:MasbateMineMember
1269 Libertad Member btg:LibertadMineMember
1270 Limon Member btg:LimonMineMember
1271 Toega, Burkina Faso Member btg:ToegaBurkinaFasoMember
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1273 Ondundu Member btg:OndunduNambibiaMember
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1279 Other exploration and development Concept (Monetary) For Period Credit ifrs-full:PaymentsForExplorationAndEvaluationExpenses
1280 2452405 - Disclosure - Supplementary cash flow information - Non-cash investing and financing activities (Details) Network

*

*

 http://www.b2gold.com/role/SupplementaryCashFlowInformationNonCashInvestingAndFinancingActivitiesDetails
1281 Statement Of Cash Flows [Table] Table

*

*

 btg:StatementOfCashFlowsTable
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1285 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
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1288 Kronk Member btg:KronkMember
1289 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1290 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
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1293 Non-controlling interest sold in exchange for loan receivable (Note 8) Concept (Monetary) For Period Debit btg:NoncashTransactionNoncontrollingInterestSoldInExchangeForLoanReceivable
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1300 Restricted cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
1301 2455402 - Disclosure - Compensation of key management (Details) Network

*

*

 http://www.b2gold.com/role/CompensationOfKeyManagementDetails
1302 Implied Table Table

*

*

 implied:Table
1303 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
1304 Salaries and short-term employee benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1305 Share-based payments Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1306 Key management personnel compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1307 2458402 - Disclosure - Production costs by nature (Details) Network

*

*

 http://www.b2gold.com/role/ProductionCostsByNatureDetails
1308 Disclosure Of Expense By Nature [Table] Table

*

*

 btg:DisclosureOfExpenseByNatureTable
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1313 Raw materials and consumables Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
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1316 Electricity Concept (Monetary) For Period Debit ifrs-full:EnergyTransmissionCharges
1317 Equipment rental Concept (Monetary) For Period Debit ifrs-full:RentalExpense
1318 Other Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
1319 Silver credits Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfSilver
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1323 2461402 - Disclosure - Segmented information - Operating segments (Details) Network

*

*

 http://www.b2gold.com/role/SegmentedInformationOperatingSegmentsDetails
1324 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
1325 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
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1337 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
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1343 Write-down mineral property interests Concept (Monetary) For Period Debit btg:ImpairmentLossRecognisedInProfitOrLossMineralProperties
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1348 2461403 - Disclosure - Segmented information - Mining Interest by Country (Details) Network

*

*

 http://www.b2gold.com/role/SegmentedInformationMiningInterestByCountryDetails
1349 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
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1351 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
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1363 2464401 - Disclosure - Commitments - Narrative (Details) Network

*

*

 http://www.b2gold.com/role/CommitmentsNarrativeDetails
1364 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
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1371 Mobile Equipment Member btg:MobileEquipmentMember
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1382 2467402 - Disclosure - Mining Interest Schedule (Details) Network

*

*

 http://www.b2gold.com/role/MiningInterestScheduleDetails
1383 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1384 Name Of Property [Axis] Axis btg:NameOfPropertyAxis
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1413 Property, plant and equipment, beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1414 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1415 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1416 Disposals / write-offs / impairments Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
1417 Reclass Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
1418 Property, plant and equipment, ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1419 Reconciliation Of Changes In Joint Ventures Accounted For Using Equity Method [Roll Forward] Abstract btg:ReconciliationOfChangesInJointVenturesAccountedForUsingEquityMethodRollForward
1420 Investments in joint ventures (accounted for using the equity method) beginning balance Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1421 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsInvestmentProperty
1422 Disposals / write-offs / impairments Concept (Monetary) For Period Credit ifrs-full:DisposalsInvestmentProperty
1423 Investments in joint ventures (accounted for using the equity method) ending balance Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1424 Reconciliation Of Changes In Property, Plant And Equipment And Joint Ventures Accounted For Using Equity Method [Roll Forward] Abstract btg:ReconciliationOfChangesInPropertyPlantAndEquipmentAndJointVenturesAccountedForUsingEquityMethodRollForward
1425 Total property, plant and equipment and joint ventures, beginning balance Concept (Monetary) As Of Debit btg:TotalPropertyPlantAndEquipmentAndJointVenturesAccountedForUsingTheEquityMethod
1426 Additions Concept (Monetary) For Period Debit btg:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipmentAndInvestmentsInJointVenturesAccountedForUsingEquityMethod
1427 Disposals / write-offs / impairments Concept (Monetary) For Period Credit btg:DisposalsPropertyPlantAndEquipmentAndInvestmentsInJointVenturesAccountedForUsingEquityMethod
1428 Total property, plant and equipment and joint ventures, ending balance Concept (Monetary) As Of Debit btg:TotalPropertyPlantAndEquipmentAndJointVenturesAccountedForUsingTheEquityMethod

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