CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 1,035	$ 482
Adjustments:
Provision for transaction losses	62	52
Depreciation and amortization	163	167
Stock-based compensation	101	88
Deferred income taxes	(565)	(28)
Changes in assets and liabilities, and other, net of acquisition effects	(214)	(120)
Net cash provided by operating activities	582	641
Cash flows from investing activities:
Purchases of property and equipment	(135)	(158)
Purchases of investments	(2,750)	(2,935)
Maturities and sales of investments	2,770	2,030
Other	0	(12)
Net cash used in investing activities	(115)	(1,075)
Cash flows from financing activities:
Proceeds from issuance of common stock	11	7
Repurchases of common stock	(410)	(1,001)
Excess tax benefits from stock-based compensation	0	1
Tax withholdings related to net share settlements of restricted stock units and awards	(29)	(8)
Proceeds from issuance of long-term debt, net	0	2,216
Other	10	7
Net cash provided by (used in) financing activities	(418)	1,222
Effect of exchange rate changes on cash and cash equivalents	114	66
Net increase (decrease) in cash and cash equivalents	163	854
Cash and cash equivalents at beginning of period	1,816	1,832
Cash and cash equivalents at end of period	1,979	2,686
Supplemental cash flow disclosures:
Cash paid for interest	109	73
Cash paid for income taxes	$ 45	$ 31