U.S. and Europe Retrospective Responsibility Plans Preferred Stock (Details) - USD ($) $ in Millions		Jun. 30, 2016		Sep. 30, 2015
Class of Stock [Line Items]
As-converted value of preferred stock	[1],[2]	$ 5,834
Book value of preferred stock	[1]	5,717
Right to recover for covered losses		(25)	[1],[2]	$ 0
Total recovery for covered losses available, as converted	[1],[2]	5,809
Total recovery for covered losses available, book value	[1]	5,692
U.K.& I preferred stock
Class of Stock [Line Items]
As-converted value of preferred stock	[1],[2]	2,567
Book value of preferred stock	[1]	2,516
Europe preferred stock
Class of Stock [Line Items]
As-converted value of preferred stock	[1],[2]	3,267
Book value of preferred stock	[1]	$ 3,201

[1] Figures in the table may not recalculate exactly due to rounding. As-converted and book values are based on unrounded numbers.

[2] The as-converted value of preferred stock is calculated as the product of: (a) 2 million and 3 million shares of the U.K.&I and Europe preferred stock outstanding, respectively, as of June 30, 2016; (b) the 13.952 class A common stock conversion rate applicable to both the U.K.&I and Europe preferred stock as of June 30, 2016; and (c) $74.17, Visa's class A common stock closing stock price as of June 30, 2016. Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.