| r0.c0 | Balance sheet before or after appropriation of results/Current | jenv-bw2-i:BalanceSheetBeforeAfterAppropriationResults | jenv-codes:profitAppropriationItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r0.c1 | Balance sheet before or after appropriation of results/Previous | jenv-bw2-i:BalanceSheetBeforeAfterAppropriationResults | jenv-codes:profitAppropriationItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c0 | Cash in hand/Current | jenv-bw2-i:CashInHand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c1 | Cash in hand/Previous | jenv-bw2-i:CashInHand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c0 | Government securities for central bank refinancing/Current | jenv-bw2-i:GovernmentSecuritiesForCentralBankRefinancing | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c1 | Government securities for central bank refinancing/Previous | jenv-bw2-i:GovernmentSecuritiesForCentralBankRefinancing | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c0 | Receivables from banks payable upon demand/Current | jenv-bw2-i:ReceivablesFromBanksPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c1 | Receivables from banks payable upon demand/Previous | jenv-bw2-i:ReceivablesFromBanksPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c0 | Other receivables from banks/Current | jenv-bw2-i:ReceivablesFromBanksOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c1 | Other receivables from banks/Previous | jenv-bw2-i:ReceivablesFromBanksOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c0 | Receivables from banks/Current | jenv-bw2-i:ReceivablesFromBanks | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c1 | Receivables from banks/Previous | jenv-bw2-i:ReceivablesFromBanks | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c0 | Receivables from banks/Current | kvk-abstr:ReceivablesFromCreditInstitutionsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c1 | Receivables from banks/Previous | kvk-abstr:ReceivablesFromCreditInstitutionsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c0 | Receivables from customers/Current | jenv-bw2-i:ReceivablesFromCustomers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c1 | Receivables from customers/Previous | jenv-bw2-i:ReceivablesFromCustomers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c0 | Bonds and other fixed-income securities from public issuers/Current | jenv-bw2-i:BondsOtherFixedIncomeSecuritiesPublicIssuers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c1 | Bonds and other fixed-income securities from public issuers/Previous | jenv-bw2-i:BondsOtherFixedIncomeSecuritiesPublicIssuers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r9.c0 | Bonds and other fixed-income securities from other issuers/Current | jenv-bw2-i:BondsOtherFixedIncomeSecuritiesOtherIssuers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r9.c1 | Bonds and other fixed-income securities from other issuers/Previous | jenv-bw2-i:BondsOtherFixedIncomeSecuritiesOtherIssuers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r10.c0 | Bonds and other fixed-income securities/Current | jenv-bw2-i:BondsOtherFixedIncomeSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r10.c1 | Bonds and other fixed-income securities/Previous | jenv-bw2-i:BondsOtherFixedIncomeSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r11.c0 | Bonds and other fixed-income securities/Current | kvk-abstr:BondsOtherFixedIncomeSecuritiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r11.c1 | Bonds and other fixed-income securities/Previous | kvk-abstr:BondsOtherFixedIncomeSecuritiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r12.c0 | Shares and other variable-yield securities/Current | jenv-bw2-i:SharesOtherVariableYieldSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r12.c1 | Shares and other variable-yield securities/Previous | jenv-bw2-i:SharesOtherVariableYieldSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r13.c0 | Investments in credit institutions as group companies/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompaniesCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r13.c1 | Investments in credit institutions as group companies/Previous | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompaniesCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r14.c0 | Investments in other group companies/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompaniesOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r14.c1 | Investments in other group companies/Previous | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompaniesOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r15.c0 | Shares, certificates of shares and other types of participating interests in group companies/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r15.c1 | Shares, certificates of shares and other types of participating interests in group companies/Previous | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompanies | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r16.c0 | Shares, certificates of shares and other types of participating interests in group companies/Current | kvk-abstr:InvestmentsInParticipatingInterestsInGroupCompaniesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r16.c1 | Shares, certificates of shares and other types of participating interests in group companies/Previous | kvk-abstr:InvestmentsInParticipatingInterestsInGroupCompaniesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r17.c0 | Other investments in participating interests in credit institutions/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsOtherCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r17.c1 | Other investments in participating interests in credit institutions/Previous | jenv-bw2-i:InvestmentsInParticipatingInterestsOtherCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r18.c0 | Other investments in other participating interests/Current | jenv-bw2-i:InvestmentsInOtherParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r18.c1 | Other investments in other participating interests/Previous | jenv-bw2-i:InvestmentsInOtherParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r19.c0 | Other investments in participating interests/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r19.c1 | Other investments in participating interests/Previous | jenv-bw2-i:InvestmentsInParticipatingInterestsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r20.c0 | Other investments in participating interests/Current | kvk-abstr:InvestmentsInParticipatingInterestsOtherTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r20.c1 | Other investments in participating interests/Previous | kvk-abstr:InvestmentsInParticipatingInterestsOtherTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r21.c0 | Costs relating to the incorporation and issuance of shares/Current | jenv-bw2-i:CostsIncorporationShareIssue | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r21.c1 | Costs relating to the incorporation and issuance of shares/Previous | jenv-bw2-i:CostsIncorporationShareIssue | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r22.c0 | Development costs/Current | jenv-bw2-i:DevelopmentCosts | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r22.c1 | Development costs/Previous | jenv-bw2-i:DevelopmentCosts | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r23.c0 | Costs of acquisition of patents, trademarks and other rights/Current | jenv-bw2-i:PatentsTrademarksOtherRights | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r23.c1 | Costs of acquisition of patents, trademarks and other rights/Previous | jenv-bw2-i:PatentsTrademarksOtherRights | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r24.c0 | Costs of goodwill acquired from third party/Current | jenv-bw2-i:Goodwill | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r24.c1 | Costs of goodwill acquired from third party/Previous | jenv-bw2-i:Goodwill | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r25.c0 | Prepayments of intangible assets/Current | jenv-bw2-i:PrepaymentsIntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r25.c1 | Prepayments of intangible assets/Previous | jenv-bw2-i:PrepaymentsIntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r26.c0 | Intangible assets/Current | jenv-bw2-i:IntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r26.c1 | Intangible assets/Previous | jenv-bw2-i:IntangibleAssets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r27.c0 | Intangible assets/Current | kvk-abstr:IntangibleAssetsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r27.c1 | Intangible assets/Previous | kvk-abstr:IntangibleAssetsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r28.c0 | Land and buildings for own use/Current | jenv-bw2-i:LandAndBuildingsForOwnUse | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r28.c1 | Land and buildings for own use/Previous | jenv-bw2-i:LandAndBuildingsForOwnUse | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r29.c0 | Other property, plant and equipment/Current | jenv-bw2-i:PropertyPlantEquipmentOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r29.c1 | Other property, plant and equipment/Previous | jenv-bw2-i:PropertyPlantEquipmentOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r30.c0 | Property, plant and equipment/Current | jenv-bw2-i:PropertyPlantEquipment | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r30.c1 | Property, plant and equipment/Previous | jenv-bw2-i:PropertyPlantEquipment | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r31.c0 | Property, plant and equipment/Current | kvk-abstr:PropertyPlantEquipmentTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r31.c1 | Property, plant and equipment/Previous | kvk-abstr:PropertyPlantEquipmentTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r32.c0 | Other assets/Current | jenv-bw2-i:AssetsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r32.c1 | Other assets/Previous | jenv-bw2-i:AssetsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r33.c0 | Called-up contributions for issued share capital/Current | jenv-bw2-i:CalledUpShareCapital | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r33.c1 | Called-up contributions for issued share capital/Previous | jenv-bw2-i:CalledUpShareCapital | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r34.c0 | Prepayments and accrued income/Current | jenv-bw2-i:AccruedIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r34.c1 | Prepayments and accrued income/Previous | jenv-bw2-i:AccruedIncome | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r35.c0 | Assets/Current | jenv-bw2-i:Assets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r35.c1 | Assets/Previous | jenv-bw2-i:Assets | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r36.c0 | Assets/Current | kvk-abstr:AssetsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r36.c1 | Assets/Previous | kvk-abstr:AssetsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r37.c0 | Payables to credit institutions payable upon demand/Current | jenv-bw2-i:PayablesCreditInstitutionsPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r37.c1 | Payables to credit institutions payable upon demand/Previous | jenv-bw2-i:PayablesCreditInstitutionsPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r38.c0 | Other payables to credit institutions/Current | jenv-bw2-i:PayablesCreditInstitutionsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r38.c1 | Other payables to credit institutions/Previous | jenv-bw2-i:PayablesCreditInstitutionsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r39.c0 | Payables to banks/Current | jenv-bw2-i:PayablesCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r39.c1 | Payables to banks/Previous | jenv-bw2-i:PayablesCreditInstitutions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r40.c0 | Payables to credit institutions/Current | kvk-abstr:PayablesCreditInstitutionsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r40.c1 | Payables to credit institutions/Previous | kvk-abstr:PayablesCreditInstitutionsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r41.c0 | Payables to customers relating to deposits payable upon demand/Current | jenv-bw2-i:PayablesCustomersDepositsPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r41.c1 | Payables to customers relating to deposits payable upon demand/Previous | jenv-bw2-i:PayablesCustomersDepositsPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r42.c0 | Other payables to customers relating to deposits/Current | jenv-bw2-i:PayablesCustomersDepositsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r42.c1 | Other payables to customers relating to deposits/Previous | jenv-bw2-i:PayablesCustomersDepositsOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r43.c0 | Payables to customers relating to deposits/Current | jenv-bw2-i:PayablesCustomersDeposits | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r43.c1 | Payables to customers relating to deposits/Previous | jenv-bw2-i:PayablesCustomersDeposits | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r44.c0 | Payables to customers relating to deposits/Current | kvk-abstr:PayablesCustomersDepositsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r44.c1 | Payables to customers relating to deposits/Previous | kvk-abstr:PayablesCustomersDepositsTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r45.c0 | Other payables to customers payable upon demand/Current | jenv-bw2-i:PayablesCustomersOtherPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r45.c1 | Other payables to customers payable upon demand/Previous | jenv-bw2-i:PayablesCustomersOtherPayableUponDemand | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r46.c0 | Other types of other payables to customers/Current | jenv-bw2-i:PayablesCustomersOtherOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r46.c1 | Other types of other payables to customers/Previous | jenv-bw2-i:PayablesCustomersOtherOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r47.c0 | Other payables to customers/Current | jenv-bw2-i:PayablesCustomersOtherLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r47.c1 | Other payables to customers/Previous | jenv-bw2-i:PayablesCustomersOtherLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
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| r48.c1 | Other payables to customers/Previous | kvk-abstr:PayablesCustomersOtherLiabilitiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r49.c0 | Payables to customers/Current | jenv-bw2-i:PayablesCustomers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r49.c1 | Payables to customers/Previous | jenv-bw2-i:PayablesCustomers | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r50.c0 | Payables to customers/Current | kvk-abstr:PayablesCustomersTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r50.c1 | Payables to customers/Previous | kvk-abstr:PayablesCustomersTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r51.c0 | Bonds and other fixed-interest debt securities/Current | jenv-bw2-i:BondsOtherFixedInterestDebtSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r51.c1 | Bonds and other fixed-interest debt securities/Previous | jenv-bw2-i:BondsOtherFixedInterestDebtSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r52.c0 | Other debt securities/Current | jenv-bw2-i:DebtSecuritiesOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r52.c1 | Other debt securities/Previous | jenv-bw2-i:DebtSecuritiesOther | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
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| r53.c1 | Debt securities/Previous | jenv-bw2-i:DebtSecurities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
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| r54.c1 | Debt securities/Previous | kvk-abstr:DebtSecuritiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
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| r57.c1 | Provisions/Previous | jenv-bw2-i:Provisions | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
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| r59.c0 | Subordinated liabilities/Current | jenv-bw2-i:SubordinatedLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r59.c1 | Subordinated liabilities/Previous | jenv-bw2-i:SubordinatedLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r60.c0 | Non-controlling interest/Current | jenv-bw2-i:NoncontrollingInterest | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r60.c1 | Non-controlling interest/Previous | jenv-bw2-i:NoncontrollingInterest | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r61.c0 | Equity/Current | jenv-bw2-i:Equity | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r61.c1 | Equity/Previous | jenv-bw2-i:Equity | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r62.c0 | Group equity/Current | jenv-bw2-i:EquityGroup | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r62.c1 | Group equity/Previous | jenv-bw2-i:EquityGroup | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r63.c0 | Group equity/Current | kvk-abstr:EquityGroupTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r63.c1 | Group equity/Previous | kvk-abstr:EquityGroupTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r64.c0 | Equity and liabilities/Current | jenv-bw2-i:EquityAndLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r64.c1 | Equity and liabilities/Previous | jenv-bw2-i:EquityAndLiabilities | nl-types:monetaryNoDecimalsItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r65.c0 | Equity and liabilities/Current | kvk-abstr:EquityAndLiabilitiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r65.c1 | Equity and liabilities/Previous | kvk-abstr:EquityAndLiabilitiesTitle | xbrli:stringItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |