CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 482	$ 626
Income from discontinued operations, net of income taxes	0	(177)
Adjustments:
Provision for transaction losses	52	69
Depreciation and amortization	167	160
Stock-based compensation	88	93
Changes in assets and liabilities, and other, net of acquisition effects	(148)	(270)
Net cash provided by continuing operating activities	641	501
Net cash provided by discontinued operating activities	0	650
Net cash provided by operating activities	641	1,151
Cash flows from investing activities:
Purchases of property and equipment	(158)	(96)
Purchases of investments	(2,935)	(2,420)
Maturities and sales of investments	2,030	2,019
Other	(12)	(1)
Net cash used in continuing investing activities	(1,075)	(498)
Net cash used in discontinued investing activities	0	(226)
Net cash used in investing activities	(1,075)	(724)
Cash flows from financing activities:
Proceeds from issuance of common stock	7	38
Repurchases of common stock	(1,001)	(1,000)
Excess tax benefits from stock-based compensation	1	20
Tax withholdings related to net share settlements of restricted stock units and awards	(8)	(51)
Proceeds from issuance of long-term debt, net	2,216	0
Other	7	0
Net cash provided by (used in) continuing financing activities	1,222	(993)
Net cash provided by discontinued financing activities	0	8
Net cash provided by (used) in financing activities	1,222	(985)
Effect of exchange rate changes on cash and cash equivalents	66	(297)
Net increase (decrease) in cash and cash equivalents	854	(855)
Cash and cash equivalents at beginning of period	1,832	6,328
Cash and cash equivalents at end of period	2,686	5,473
Less: Cash and cash equivalents of discontinued operations	0	2,367
Cash and cash equivalents of continuing operations at end of period	2,686	3,106
Supplemental cash flow disclosures:
Cash paid for interest	73	74
Cash paid for income taxes	$ 31	$ 101