CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 1,062	$ 917
Loss from discontinued operations, net of income taxes	0	2
Adjustments:
Provision for transaction losses	125	116
Depreciation and amortization	331	334
Stock-based compensation	238	201
Deferred income taxes	(123)	(62)
Changes in assets and liabilities, and other, net of acquisition effects	(352)	(103)
Net cash provided by continuing operating activities	1,281	1,405
Net cash used in discontinued operating activities	0	(1)
Net cash provided by operating activities	1,281	1,404
Cash flows from investing activities:
Purchases of property and equipment	(317)	(305)
Purchases of investments	(7,603)	(5,128)
Maturities and sales of investments	5,815	3,519
Other	(21)	(59)
Net cash used in continuing investing activities	(2,126)	(1,973)
Net cash used in discontinued investing activities	0	0
Net cash used in investing activities	(2,126)	(1,973)
Cash flows from financing activities:
Proceeds from issuance of common stock	62	52
Repurchases of common stock	(917)	(1,501)
Excess tax benefits from stock-based compensation	0	4
Tax withholdings related to net share settlements of restricted stock units and awards	(130)	(77)
Proceeds from issuance of long-term debt, net	2,484	2,216
Other	15	(9)
Net cash provided by continuing financing activities	1,514	685
Net cash used in discontinued financing activities	0	0
Net cash provided by financing activities	1,514	685
Effect of exchange rate changes on cash and cash equivalents	151	53
Net increase (decrease) in cash and cash equivalents	820	169
Cash and cash equivalents at beginning of period	1,816	1,832
Cash and cash equivalents at end of period	2,636	2,001
Less: Cash and cash equivalents of discontinued operations	0	0
Cash and cash equivalents of continuing operations at end of period	2,636	2,001
Supplemental cash flow disclosures:
Cash paid for interest	131	91
Cash paid for income taxes	$ 163	$ 84