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Settlement Guarantee Management - Additional Information (Details) $ in Billions | 6 Months Ended
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Mar. 31, 2024 USD ($)
Settlement Guarantee Management [Abstract] |
Maximum settlement exposure | $ 133.7
Average daily settlement exposure | 82.3
Total collateral | $ 7.2

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- Definition Average Daily Settlement Exposure + References No definition available. + Details
Name: | v_AverageDailySettlementExposure
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Maximum Settlement Exposure + References No definition available. + Details
Name: | v_MaximumSettlementExposure
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Disclosure - Settlement Guarantee Management [Abstract] + References No definition available. + Details
Name: | v_SettlementGuaranteeManagementAbstract
Namespace Prefix: | v_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total of cash deposits and non-cash collateral assets including cash equivalents, pledged securities at market value, letters of credit, guarantees and beneficial rights to trust assets. + References No definition available. + Details
Name: | v_TotalCollateral
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant