Collateral (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016
Settlement Guarantee Management [Abstract]
Cash equivalents	$ 1,490	$ 1,295
Pledged securities at market value	167	170
Letters of credit	1,316	1,311
Guarantees	941	1,418
Total	$ 3,914	$ 4,194

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