Income Tax Expense by Fiscal Year (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2014
Current:
U.S. federal	$ 2,250		$ 1,991	$ 2,353
State and local	181		168	237
Non-U.S.	368		300	274
Total current taxes	2,799		2,459	2,864
Deferred:
U.S. federal	(508)		181	(576)
State and local	(63)		1	(31)
Non-U.S.	(207)		26	29
Total deferred taxes	(778)		208	(578)
Income tax provision	$ 2,021	[1]	$ 2,667	$ 2,286

[1] The Company did not include Visa Europe's financial results in the Company's consolidated statements of operations from the acquisition date, June 21, 2016, through June 30, 2016 as the impact was immaterial. The Company's consolidated statement of operations for the year ended September 30, 2016 includes Visa Europe's financial results for the three months ended September 30, 2016. See Note 2—Acquisition of Visa Europe.