CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014	Mar. 31, 2013
Operating Revenues
Service revenues	$ 1,462		$ 1,369		$ 2,881	$ 2,669
Data processing revenues	1,234		1,150		2,498	2,265
International transaction revenues	871		831		1,762	1,636
Other revenues	183		175		363	354
Client incentives	(587)		(567)		(1,186)	(1,120)
Total operating revenues	3,163		2,958		6,318	5,804
Operating Expenses
Personnel	446		486		916	940
Marketing	245		195		431	388
Network and processing	120		119		252	229
Professional fees	77		91		152	179
Depreciation and amortization	107		98		214	190
General and administrative	120		108		228	214
Litigation provision (Note 12)			1			4
Total operating expenses	1,115		1,098		2,193	2,144
Operating income	2,048		1,860		4,125	3,660
Non-operating income (expense)	13		(3)		19	(2)
Income before income taxes	2,061		1,857		4,144	3,658
Income tax provision	463		587		1,139	1,095
Net income	$ 1,598		$ 1,270		$ 3,005	$ 2,563
Class A common stock
Earnings Per Share
Basic earnings per share (Note 9)	$ 2.53	[1]	$ 1.93	[1]	$ 4.74	$ 3.87
Basic weighted-average shares outstanding (Note 9)	501	[1]	524	[1]	503	528
Diluted earnings per share (Note 9)	$ 2.52	[1]	$ 1.92	[1]	$ 4.72	$ 3.86
Diluted weighted-average shares outstanding (Note 9)	634	[1],[2]	660	[1],[2]	636	665
Class B common stock
Earnings Per Share
Basic earnings per share (Note 9)	$ 1.06	[1]	$ 0.81	[1]	$ 1.99	$ 1.63
Basic weighted-average shares outstanding (Note 9)	245	[1]	245	[1]	245	245
Diluted earnings per share (Note 9)	$ 1.06	[1]	$ 0.81	[1]	$ 1.99	$ 1.62
Diluted weighted-average shares outstanding (Note 9)	245	[1]	245	[1]	245	245
Class C common stock
Earnings Per Share
Basic earnings per share (Note 9)	$ 2.53	[1]	$ 1.93	[1]	$ 4.74	$ 3.87
Basic weighted-average shares outstanding (Note 9)	26	[1]	28	[1]	26	29
Diluted earnings per share (Note 9)	$ 2.52	[1]	$ 1.92	[1]	$ 4.72	$ 3.86
Diluted weighted-average shares outstanding (Note 9)	26	[1]	28	[1]	26	29

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

[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 2 million of common stock equivalents for the three and six months ended March 31, 2014 and 2013, because their effect would be dilutive. The calculation excludes less than 1 million of common stock equivalents for the three and six months ended March 31, 2014 and 2013, because their effect would have been anti-dilutive.