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U.S. and Europe Retrospective Responsibility Plans - Schedule of Changes in Preferred Stock and Right to Recover Covered Losses (Details) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) $ / shares shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2025 USD ($) $ / shares shares | Jun. 30, 2024 USD ($) shares | Mar. 31, 2025 shares | Sep. 30, 2024 USD ($) $ / shares shares | Mar. 31, 2024 shares | Sep. 30, 2023 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of period | $ 38,030 |  | $ 40,485 |  | $ 39,137 |  | $ 38,733 |  |  |  |  |
VE territory covered losses | 2 |  | (21) |  | (22) |  | (81) |  |  |  |  |
Recovery through conversion rate adjustment |  |  | (6) |  | 0 |  | (6) |  |  |  |  |
Balance as of end of period | 38,664 |  | 39,729 |  | 38,664 |  | 39,729 |  |  |  |  |
As-converted Value of Preferred Stock | 2,875 |  |  |  | 2,875 |  |  |  |  | $ 2,234 |  |
Book value of preferred stock | 871 |  |  |  | 871 |  |  |  |  | 1,031 |  |
Book Value of Preferred Stock, Total | 483 |  |  |  | 483 |  |  |  |  | 491 |  |
Less: right to recover for covered losses | (118) |  |  |  | (118) |  |  |  |  | (104) |  |
As-converted Value of Preferred Stock, Total recovery for covered losses available | 2,757 |  |  |  | 2,757 |  |  |  |  | 2,130 |  |
Book Value of Preferred of Stock, Total recovery for covered losses available | $ 365 |  |  |  | $ 365 |  |  |  |  | $ 387 |  |
Preferred stock, shares outstanding (in shares) | shares | 5 |  |  |  | 5 |  |  |  |  | 5 |  |
Share price (in dollars per share) | $ / shares | $ 355.05 |  |  |  | $ 355.05 |  |  |  |  | $ 274.95 |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of period | $ 880 |  | 1,602 |  | $ 1,031 | [1] | 1,698 | [2] |  |  |  |
Recovery through conversion rate adjustment |  |  | (156) |  | (8) |  | (181) |  |  |  |  |
Balance as of end of period | $ 871 | [1] | $ 1,425 | [2] | $ 871 | [1] | $ 1,425 | [2] |  |  |  |
Preferred stock, shares outstanding (in shares) | shares | 5 |  | 5 |  | 5 |  | 5 |  | 5 | 5 | 5 | 5
Right to Recover for Covered Losses |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of period | $ (120) |  | $ (175) |  | $ (104) |  | $ (140) |  |  |  |  |
VE territory covered losses | 2 |  | (21) |  | (22) |  | (81) |  |  |  |  |
Recovery through conversion rate adjustment |  |  | 150 |  | 8 |  | 175 |  |  |  |  |
Balance as of end of period | (118) |  | (46) |  | (118) |  | (46) |  |  |  |  |
Series B preferred stock |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Recovery through conversion rate adjustment |  |  |  |  | 5 |  | 161 |  |  |  |  |
As-converted Value of Preferred Stock | 877 |  |  |  | 877 |  |  |  |  | $ 684 |  |
Book value of preferred stock | $ 99 |  |  |  | $ 99 |  |  |  |  | $ 104 |  |
Preferred stock, shares outstanding (in shares) | shares | 2 |  |  |  | 2 |  |  |  |  | 2 |  |
Preferred stock, conversion rate | 0.9960 |  |  |  | 0.9960 |  |  |  |  | 1.0030 |  |
Series B preferred stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of period |  |  |  |  | $ 104 |  | 441 |  |  |  |  |
VE territory covered losses |  |  |  |  | 0 |  | 0 |  |  |  |  |
Recovery through conversion rate adjustment |  |  |  |  | (5) |  | (161) |  |  |  |  |
Balance as of end of period | $ 99 |  | 280 |  | 99 |  | 280 |  |  |  |  |
Series C preferred stock |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Recovery through conversion rate adjustment |  |  |  |  | 3 |  | 20 |  |  |  |  |
As-converted Value of Preferred Stock | 1,998 |  |  |  | 1,998 |  |  |  |  | $ 1,550 |  |
Book value of preferred stock | $ 384 |  |  |  | $ 384 |  |  |  |  | $ 387 |  |
Preferred stock, shares outstanding (in shares) | shares | 3 |  |  |  | 3 |  |  |  |  | 3 |  |
Preferred stock, conversion rate | 1.7830 |  |  |  | 1.7830 |  |  |  |  | 1.7860 |  |
Series C preferred stock | Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of period |  |  |  |  | $ 387 |  | 801 |  |  |  |  |
VE territory covered losses |  |  |  |  | 0 |  | 0 |  |  |  |  |
Recovery through conversion rate adjustment |  |  |  |  | (3) |  | (20) |  |  |  |  |
Balance as of end of period | $ 384 |  | $ 781 |  | $ 384 |  | $ 781 |  |  |  |  |
[1] | As of June 30, 2025 and September 30, 2024, the book value of series A convertible participating preferred stock (series A preferred stock) was $388 million and $540 million, respectively. See Note 5—U.S. and Europe Retrospective Responsibility Plans for the book value of series B convertible participating preferred stock (series B preferred stock) and series C convertible participating preferred stock (series C preferred stock).
[2] | As of June 30, 2024 and September 30, 2023, the book value of series A preferred stock was $364 million and $456 million, respectively. See Note 5—U.S. and Europe Retrospective Responsibility Plans for the book value of series B and series C preferred stock.

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- Definition Preferred Stock Available to Recover Covered Losses, Value, As-converted, Gross + References No definition available. + Details
Name: | v_PreferredStockAvailableToRecoverCoveredLossesValueAsConvertedGross
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Preferred Stock Available to Recover Covered Losses, Value, Gross + References No definition available. + Details
Name: | v_PreferredStockAvailableToRecoverCoveredLossesValueGross
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Preferred Stock Available to Recover Covered Losses, Value, As-converted, Net + References No definition available. + Details
Name: | v_PreferredStockAvailabletoRecoverCoveredLossesValueAsconvertedNet
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Preferred Stock Available to Recover Covered Losses, Value, Net + References No definition available. + Details
Name: | v_PreferredStockAvailabletoRecoverCoveredLossesValueNet
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Preferred Stock, Conversion Rate + References No definition available. + Details
Name: | v_PreferredStockConversionRate
Namespace Prefix: | v_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount Recovered Through Conversion Rate Adjustment + References No definition available. + Details
Name: | v_RecoveryThroughConversionRateAdjustment
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition VE Covered Loss, Protection from the Plan Relating to Liabilities where the Claim Relates to Inter-regional Multilateral Interchange Fee Rates + References No definition available. + Details
Name: | v_VECoveredLossProtectionfromthePlanRelatingtoLiabilitieswheretheClaimRelatestoInterregionalMultilateralInterchangeFeeRates
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition VE Territory Covered Losses + References No definition available. + Details
Name: | v_VETerritoryCoveredLosses
Namespace Prefix: | v_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=v_RightToRecoverForCoveredLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |