0000312069-22-000059.txt : 20220223 0000312069-22-000059.hdr.sgml : 20220223 20220223082751 ACCESSION NUMBER: 0000312069-22-000059 CONFORMED SUBMISSION TYPE: 20-F PUBLIC DOCUMENT COUNT: 292 CONFORMED PERIOD OF REPORT: 20211231 FILED AS OF DATE: 20220223 DATE AS OF CHANGE: 20220223 FILER: COMPANY DATA: COMPANY CONFORMED NAME: BARCLAYS PLC CENTRAL INDEX KEY: 0000312069 STANDARD INDUSTRIAL CLASSIFICATION: COMMERCIAL BANKS, NEC [6029] IRS NUMBER: 000000000 STATE OF INCORPORATION: X0 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 20-F SEC ACT: 1934 Act SEC FILE NUMBER: 001-09246 FILM NUMBER: 22660733 BUSINESS ADDRESS: STREET 1: 1 CHURCHILL PLACE STREET 2: CANARY WHARF CITY: LONDON STATE: X0 ZIP: E14 5HP BUSINESS PHONE: 00442031340952 MAIL ADDRESS: STREET 1: 1 CHURCHILL PLACE STREET 2: CANARY WHARF CITY: LONDON STATE: X0 ZIP: E14 5HP FORMER COMPANY: FORMER CONFORMED NAME: BARCLAYS BANK PLC DATE OF NAME CHANGE: 19850313 FORMER COMPANY: FORMER CONFORMED NAME: BARCLAYS BANK LTD DATE OF NAME CHANGE: 19820607 20-F 1 bcs-20211231.htm 20-F

false2021FY000031206900003120692021-01-012021-12-310000312069dei:BusinessContactMember2021-01-012021-12-310000312069bcs:AmericanDepositorySharesMember2021-01-012021-12-310000312069bcs:A4338FixedToFloatingRateSeniorNotesMember2021-01-012021-12-310000312069bcs:FloatingRateSeniorNotesDue2024Member2021-01-012021-12-310000312069bcs:A4972FixedToFloatingRateSeniorNotesDue2029Member2021-01-012021-12-310000312069bcs:A4610FixedToFloatingRateSeniorNotesDue2023Member2021-01-012021-12-310000312069bcs:SubordinatedFloatingRateNotesDue2023BCS23CMember2021-01-012021-12-310000312069bcs:FourPointThreeSevenFivePercentSubordinatedNotesMember2021-01-012021-12-310000312069bcs:A365FixedRateSeniorNotesDue2025Member2021-01-012021-12-310000312069bcs:A525FixedRateSeniorNotesDue2045Member2021-01-012021-12-310000312069bcs:A4375FixedRateSeniorNotesDue2026Member2021-01-012021-12-310000312069bcs:FivePointTwoZeroPercentSubordinatedNotesMember2021-01-012021-12-310000312069bcs:SubordinatedFloatingRateNotesDue2023Member2021-01-012021-12-310000312069bcs:A3684FixedRateSeniorNotesDue2023Member2021-01-012021-12-310000312069bcs:A4337FixedRateSeniorNotesDue2028Member2021-01-012021-12-310000312069bcs:A4950FixedRateSeniorNotesDue2047Member2021-01-012021-12-310000312069bcs:FourPointThreeEightSixPercentSubordinatedNotesMember2021-01-012021-12-310000312069bcs:A3250FixedRateSeniorNotesDue2033Member2021-01-012021-12-310000312069bcs:A3932FixedToFloatingRateSeniorNotesDue2025Member2021-01-012021-12-310000312069bcs:A5088CallableTierTwoNotesMember2021-01-012021-12-310000312069bcs:A2852FixedToFloatingRateSeniorNotesDue2026Member2021-01-012021-12-310000312069bcs:A2645FixedRateResettingSeniorCallableNotesDue2031Member2021-01-012021-12-310000312069bcs:A3564ResettingSubordinatedCallableNotesMember2021-01-012021-12-310000312069bcs:A1007FixedRateResettingSeniorCallableNotesDue2024Member2021-01-012021-12-310000312069bcs:A2667FixedRateResettingSeniorCallableNotesDue2032Member2021-01-012021-12-310000312069bcs:A3811FixedRateResettingSubordinatedCallableNotesUSD1000mMember2021-01-012021-12-310000312069bcs:A2279FixedRateResettingSeniorCallableNotesDue2027Member2021-01-012021-12-310000312069bcs:A2894FixedRateResettingSeniorCallableNotesDue2032Member2021-01-012021-12-310000312069bcs:A3330FixedRateResettingSeniorCallableNotesDue2042Member2021-01-012021-12-3100003120692021-12-31xbrli:shares0000312069ifrs-full:CreditRiskMemberbcs:CashAndBankBalancesAtCentralBanksMember2021-12-31iso4217:GBP0000312069ifrs-full:TradeReceivablesMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:MortgagesMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:ReverseRepurchaseAgreementsAndOtherSimilarSecuredLendingMemberifrs-full:CreditRiskMember2021-12-310000312069ifrs-full:DebtSecuritiesMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberbcs:TradedLoansMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069ifrs-full:DebtSecuritiesMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:ReverseRepurchaseAgreementsMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMemberbcs:OtherFinancialAssetsMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:DerivativesMemberifrs-full:CreditRiskMember2021-12-310000312069ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberbcs:OnBalanceSheetAssetsMemberifrs-full:CreditRiskMember2021-12-310000312069ifrs-full:CreditRiskMemberifrs-full:OtherAssetsMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CreditRiskMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMemberifrs-full:ItemsOfContingentLiabilitiesMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMemberifrs-full:LoanCommitmentsMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMember2021-12-310000312069ifrs-full:CreditRiskMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansToGovernmentMember2021-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansToGovernmentMember2020-12-310000312069ifrs-full:CreditRiskMemberbcs:CashAndBankBalancesAtCentralBanksMember2020-12-310000312069ifrs-full:TradeReceivablesMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:MortgagesMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtAmortisedCostCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:ReverseRepurchaseAgreementsAndOtherSimilarSecuredLendingMemberifrs-full:CreditRiskMember2020-12-310000312069ifrs-full:DebtSecuritiesMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberbcs:TradedLoansMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069ifrs-full:DebtSecuritiesMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:ReverseRepurchaseAgreementsMemberbcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMemberbcs:OtherFinancialAssetsMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:DerivativesMemberifrs-full:CreditRiskMember2020-12-310000312069ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberifrs-full:CreditRiskMember2020-12-310000312069ifrs-full:CreditRiskMemberifrs-full:OtherAssetsMember2020-12-310000312069bcs:OnBalanceSheetAssetsMemberifrs-full:CreditRiskMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMemberifrs-full:ItemsOfContingentLiabilitiesMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CreditRiskMemberifrs-full:LoanCommitmentsMember2020-12-310000312069ifrs-full:CreditRiskMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069bcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-31xbrli:pure0000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-01-012021-12-310000312069bcs:OtherFinancialAssetsSubjectToImpairmentMember2021-01-012021-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GovernmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:BarclaysGroupWholesaleMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionCategoryMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2021-12-310000312069ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069bcs:LoansAndAdvancesAtAmortisedCostIncludingOffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:UnallocatedAmountsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupRetailMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysUkMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:OperatingSegmentsMemberbcs:BarclaysInternationalMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:UnallocatedAmountsMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:BarclaysGroupWholesaleMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:BarclaysGroupWholesaleMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-01-012020-12-310000312069bcs:OtherFinancialAssetsSubjectToImpairmentMember2020-01-012020-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-3100003120692020-12-3100003120692020-01-012020-12-310000312069bcs:BarclaysGroupWholesaleMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossDesignatedUponInitialRecognitionCategoryMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2020-12-310000312069ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:CurrentMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:NotLaterThanOneMonthMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:LifetimeExpectedCreditLossesMemberbcs:GreaterThanOneMonthPastDueMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMember2020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMember2021-01-012021-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersToStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageThreeMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMember2021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2021-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:DebtSecuritiesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:BarclaysAssetFinanceMemberifrs-full:FinancialAssetsAtAmortisedCostMember2021-01-012021-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:CorporateLoansMember2021-01-012021-12-310000312069ifrs-full:LoansAndReceivablesCategoryMember2021-01-012021-12-310000312069ifrs-full:FinancialGuaranteeContractsMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:MortgagesMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:MortgagesMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMember2020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMember2021-01-012021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2021-01-012021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMember2021-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2021-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageThreeMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2019-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMember2019-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMember2020-01-012020-12-310000312069bcs:TransfersFromStageOneToStageTwoMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageTwoToStageOneMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageTwoToStageOneMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageTwoToStageOneMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersToStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberbcs:TransfersFromStageThreeMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:BarclaysPartnerFinanceMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:CorporateLoansMemberifrs-full:FinancialAssetsAtAmortisedCostMember2020-01-012020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberifrs-full:FinancialAssetsAtAmortisedCostMember2019-01-012019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:OtherFinancialAssetsSubjectToImpairmentMember2019-12-310000312069ifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:OtherAssetsMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:CorporateLoansMember2020-01-012020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMember2020-01-012020-12-310000312069ifrs-full:FinancialGuaranteeContractsMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:MortgagesMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:MortgagesMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:MortgagesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsNotCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:FinancialInstrumentsCreditimpairedMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMember2019-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2019-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMemberifrs-full:TwelvemonthExpectedCreditLossesMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsNotCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMemberifrs-full:LifetimeExpectedCreditLossesMemberifrs-full:CorporateLoansMemberifrs-full:FinancialInstrumentsCreditimpairedMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:AccumulatedImpairmentMember2020-01-012020-12-310000312069ifrs-full:GrossCarryingAmountMemberbcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMember2020-01-012020-12-310000312069bcs:OffBalanceSheetLoanCommitmentsAndFinancialGuaranteeContractsMemberifrs-full:CorporateLoansMemberifrs-full:AccumulatedImpairmentMember2020-01-012020-12-310000312069ifrs-full:MortgagesMember2021-12-310000312069ifrs-full:MortgagesMember2020-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:CorporateLoansMember2021-12-310000312069ifrs-full:CorporateLoansMember2020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069ifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:MortgagesMember2021-12-310000312069ifrs-full:MortgagesMemberbcs:OtherAdjustmentsMember2021-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:OtherAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069ifrs-full:CorporateLoansMemberbcs:EconomicUncertaintyAdjustmentsMember2021-12-310000312069ifrs-full:CorporateLoansMemberbcs:OtherAdjustmentsMember2021-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:OtherAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:MortgagesMember2020-12-310000312069ifrs-full:MortgagesMemberbcs:OtherAdjustmentsMember2020-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:OtherAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:CorporateLoansMemberbcs:EconomicUncertaintyAdjustmentsMember2020-12-310000312069ifrs-full:CorporateLoansMemberbcs:OtherAdjustmentsMember2020-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:OtherAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069ifrs-full:ExpectedCreditLossesCollectivelyAssessedMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069ifrs-full:ExpectedCreditLossesCollectivelyAssessedMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069ifrs-full:ExpectedCreditLossesIndividuallyAssessedMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069ifrs-full:ExpectedCreditLossesIndividuallyAssessedMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberbcs:ExpectedCreditLossesFromNonModelledExposuresMember2021-12-310000312069ifrs-full:LoansAndReceivablesCategoryMemberbcs:ExpectedCreditLossesFromNonModelledExposuresMember2020-12-310000312069bcs:OtherAdjustmentsMemberifrs-full:LoansToGovernmentMember2021-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:LoansToGovernmentMember2021-12-310000312069bcs:OtherAdjustmentsMemberifrs-full:LoansToGovernmentMember2020-12-310000312069bcs:EconomicUncertaintyAdjustmentsMemberifrs-full:LoansToGovernmentMember2020-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMember2021-01-012021-12-31bcs:method0000312069bcs:Covid19RelatedUncertaintyAdjustmentsMember2021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMember2020-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:MajorCustomersMember2021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:MajorCustomersMember2020-12-310000312069bcs:ModelUncertaintyRiskMemberbcs:Covid19RelatedUncertaintyAdjustmentsMember2021-12-310000312069bcs:ModelUncertaintyRiskMemberbcs:Covid19RelatedUncertaintyAdjustmentsMember2020-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:MajorCustomersMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:MajorCustomersMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMemberifrs-full:GuaranteesMember2021-01-012021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMemberifrs-full:LoansAndReceivablesCategoryMember2020-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMembercountry:USbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069bcs:Covid19RelatedUncertaintyAdjustmentsMembercountry:USbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069ifrs-full:CorporateLoansMemberbcs:Covid19RelatedUncertaintyAdjustmentsMember2021-12-310000312069ifrs-full:CorporateLoansMemberbcs:Covid19RelatedUncertaintyAdjustmentsMember2020-12-310000312069country:GBbcs:Covid19RelatedUncertaintyAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2021-12-310000312069country:GBbcs:Covid19RelatedUncertaintyAdjustmentsMemberbcs:CreditCardsUnsecuredAndOtherRetailLendingMember2020-12-310000312069bcs:ModelUncertaintyRiskMemberbcs:Covid19RelatedUncertaintyAdjustmentsMember2021-01-012021-12-310000312069ifrs-full:CreditRiskMember2021-01-012021-12-31bcs:economic_scenario0000312069bcs:DownsideScenarioMemberifrs-full:CreditRiskMember2021-01-012021-12-310000312069bcs:UpsideScenarioMemberifrs-full:CreditRiskMember2021-01-012021-12-31bcs:economicVariable0000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanOneMonthAndNotLaterThanThreeMonthsMember2021-12-310000312069country:GBbcs:DownsideTwoMemberbcs:UnemploymentEconomicCoreVariableMemberifrs-full:NotLaterThanOneYearMember2021-12-310000312069bcs:DownsideTwoMemberbcs:UnemploymentEconomicCoreVariableMemberifrs-full:NotLaterThanOneYearMembercountry:US2021-01-012021-12-310000312069bcs:LaterThanSixMonthsAndNotLaterThanNineMonthsMembercountry:GBbcs:DownsideTwoMemberbcs:UnemploymentEconomicCoreVariableMember2021-12-310000312069bcs:LaterThanSixMonthsAndNotLaterThanNineMonthsMemberbcs:DownsideTwoMemberbcs:UnemploymentEconomicCoreVariableMembercountry:US2021-12-310000312069country:GBifrs-full:NotLaterThanOneYearMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberifrs-full:NotLaterThanOneYearMemberbcs:BaselineMember2021-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember2021-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMember2021-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMember2021-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember2021-12-310000312069country:GBifrs-full:NotLaterThanOneYearMemberbcs:BaselineMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069country:GBifrs-full:NotLaterThanOneYearMemberbcs:BaselineMemberbcs:BankRateMember2021-12-310000312069country:GBbcs:BaselineMemberbcs:BankRateMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember2021-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMemberbcs:BankRateMember2021-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMemberbcs:BankRateMember2021-12-310000312069country:GBbcs:BaselineMemberbcs:BankRateMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember2021-12-310000312069ifrs-full:NotLaterThanOneYearMemberbcs:BaselineMembercountry:USbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069bcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMembercountry:USbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMembercountry:USbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMembercountry:USbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069bcs:BaselineMembercountry:USifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:GrossDomesticProductEconomicVariableMember2021-12-310000312069bcs:UnemploymentEconomicCoreVariableMemberifrs-full:NotLaterThanOneYearMemberbcs:BaselineMembercountry:US2021-12-310000312069bcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMembercountry:US2021-12-310000312069ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMembercountry:US2021-12-310000312069ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMembercountry:US2021-12-310000312069bcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMembercountry:USifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember2021-12-310000312069ifrs-full:NotLaterThanOneYearMemberbcs:BaselineMembercountry:USbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069bcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMembercountry:USbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMembercountry:USbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMembercountry:USbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069bcs:BaselineMembercountry:USifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:HousePriceIndexEconomicCoreVariableMember2021-12-310000312069ifrs-full:NotLaterThanOneYearMemberbcs:BaselineMembercountry:USbcs:FederalFundsRateMember2021-12-310000312069bcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMembercountry:USbcs:FederalFundsRateMember2021-12-310000312069ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMembercountry:USbcs:FederalFundsRateMember2021-12-310000312069ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMembercountry:USbcs:FederalFundsRateMember2021-12-310000312069bcs:BaselineMembercountry:USifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:FederalFundsRateMember2021-12-310000312069country:GBifrs-full:NotLaterThanOneYearMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2020-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMemberbcs:GrossDomesticProductEconomicVariableMember2020-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2020-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:BaselineMemberbcs:GrossDomesticProductEconomicVariableMember2020-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMemberbcs:GrossDomesticProductEconomicVariableMember2020-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberifrs-full:NotLaterThanOneYearMemberbcs:BaselineMember2020-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember2020-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMember2020-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMemberbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMember2020-12-310000312069country:GBbcs:UnemploymentEconomicCoreVariableMemberbcs:BaselineMemberifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember2020-12-310000312069country:GBifrs-full:NotLaterThanOneYearMemberbcs:BaselineMemberbcs:HousePriceIndexEconomicCoreVariableMember2020-12-310000312069country:GBbcs:BaselineMemberifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMemberbcs:HousePriceIndexEconomicCoreVariableMember2020-12-310000312069country:GBifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMemberbcs:BaselineMemberbcs:HousePriceIndexEconomicCoreVariableMember2020-12-310000312069country:GBifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember