Collateral (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Settlement Guarantee Management [Abstract]
Cash equivalents	$ 866	$ 823
Pledged securities at market value	256	307
Letters of credit	1,191	1,084
Guarantees	1,411	2,022
Total	$ 3,724	$ 4,236

The Company holds cash deposits from certain customers in order to ensure their performance of settlement obligations arising from credit, debit and travelers cheque product clearings. The cash collateral assets are restricted and fully offset by corresponding liabilities and both balances are presented on the consolidated balance sheet.

No definition available.

Name:	v_CashCollateralReceived
Namespace Prefix:	v_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant