CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parentheticals) - $ / shares	3 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared and paid, quarterly, per Class A share (in dollars per share)	$ 0.30	$ 0.25

Cash dividends declared and paid, quarterly, per as-converted share

No definition available.

Name:	v_Cashdividendsdeclaredandpaidquarterlyperasconvertedshare
Namespace Prefix:	v_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration