CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Operating Revenues
Service revenues		$ 1,918	$ 1,645
Data processing revenues		1,892	1,479
International transaction revenues		1,489	1,031
Other revenues		203	198
Client incentives		(1,041)	(788)
Net operating revenues		4,461	3,565
Operating Expenses
Personnel		571	499
Marketing		218	194
Network and processing		145	128
Professional fees		80	72
Depreciation and amortization		146	120
General and administrative		186	156
Litigation provision (Note 12)		15	0
Total operating expenses		1,361	1,169
Operating income		3,100	2,396
Non-operating (Expense) Income
Interest expense		(140)	(29)
Other		19	272
Non-operating (expense) income		(121)	243
Income before income taxes		2,979	2,639
Income tax provision (Note 11)		909	698
Net income		$ 2,070	$ 1,941
Class A common stock
Earnings Per Share
Basic earnings per share (Note 9) (in dollars per share)	[1]	$ 0.86	$ 0.80
Basic weighted-average shares outstanding (Note 9) (in shares)		1,860	1,937
Diluted earnings per share (Note 9) (in dollars per share)	[1]	$ 0.86	$ 0.80
Diluted weighted-average shares outstanding (Note 9) (in shares)	[2]	2,421	2,430
Class B common stock
Earnings Per Share
Basic earnings per share (Note 9) (in dollars per share)	[1]	$ 1.41	$ 1.32
Basic weighted-average shares outstanding (Note 9) (in shares)		245	245
Diluted earnings per share (Note 9) (in dollars per share)	[1]	$ 1.41	$ 1.32
Diluted weighted-average shares outstanding (Note 9) (in shares)		245	245
Class C common stock
Earnings Per Share
Basic earnings per share (Note 9) (in dollars per share)	[1]	$ 3.43	$ 3.20
Basic weighted-average shares outstanding (Note 9) (in shares)		17	20
Diluted earnings per share (Note 9) (in dollars per share)	[1]	$ 3.42	$ 3.20
Diluted weighted-average shares outstanding (Note 9) (in shares)		17	20

[1] Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

[2] Weighted-average diluted shares outstanding are calculated on an as-converted basis, and include incremental common stock equivalents, as calculated under the treasury stock method. The computation includes approximately 5 million common stock equivalents for the three months ended December 31, 2016 and 2015 because their effect would be dilutive. The computation excludes 3 million and 1 million of common stock equivalents for the three months ended December 31, 2016 and 2015, respectively, because their effect would have been anti-dilutive.