CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Net income including non-controlling interest	$ 4,980	$ 2,142	$ 3,646
Investment securities, available-for-sale:
Net unrealized gain (loss)	88	4	(1)
Income tax effect	(33)	(1)	0
Reclassification adjustment for net loss (gain) realized in net income including non-controlling interest	1	0	(4)
Income tax effect	0	0	2
Defined benefit pension and other postretirement plans	203	0	(117)
Income tax effect	(77)	0	46
Derivative instruments classified as cash flow hedges:
Net unrealized gain	39	3	18
Income tax effect	(6)	(1)	(9)
Reclassification adjustment for net (gain) loss realized in net income including non-controlling interest	(29)	(14)	62
Income tax effect	6	7	(13)
Foreign currency translation adjustments	0	7	(9)
Other comprehensive income (loss), net of tax	192	5	(25)
Comprehensive income including non-controlling interest	5,172	2,147	3,621
Comprehensive loss attributable to non-controlling interest	0	2	4
Comprehensive income attributable to Visa Inc.	$ 5,172	$ 2,149	$ 3,625