Stockholders' Equity - Schedule of As-Converted Class B Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Equity [Abstract]
Reduction in equivalent number of class A common stock (in shares)	4
Effective price per share (in dollars per share)	$ 205.06
Deposits under the U.S. retrospective responsibility plan	$ 850	$ 0

Number of shares, on an as-converted basis, that have been repurchased through the Escrow Funding during the period.

No definition available.

Name:	v_Stockasconvertedrepurchasedduringperiodthroughescrowfundingshares
Namespace Prefix:	v_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration