U.S. and Europe Retrospective Responsibility Plans - Additional Information (Details) € in Millions	9 Months Ended
Jun. 30, 2025 EUR (€)
Retrospective Responsibility Plans [Abstract]
VE covered loss, maximum amount of loss to allow adjustment of conversion rate during six-month period	€ 20

VE Covered Loss, Protection from the Plan Relating to Liabilities where the Claim Relates to Inter-regional Multilateral Interchange Fee Rates

No definition available.

Name:	v_VECoveredLossMaximumAmountOfLossToAllowAdjustmentOfConversionRateDuringSixMonthPeriod
Namespace Prefix:	v_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration