Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities:
Net income	$ 887	$ 735
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	39	40
Amortization of intangibles	49	47
Provision for losses on accounts receivable	13	8
Stock-based compensation	41	34
Other	26	43
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	(49)	(39)
Prepaid and other current assets	(13)	(14)
Accounts payable and accrued expenses	(139)	(171)
Unearned revenue	(17)	38
Accrued legal settlements	(4)	(108)
Other current liabilities	(85)	(21)
Net change in prepaid/accrued income taxes	(45)	92
Net change in other assets and liabilities	(29)	(44)
Cash provided by operating activities	674	640
Investing Activities:
Capital expenditures	(56)	(36)
Acquisitions, net of cash acquired	(70)	(52)
Proceeds from dispositions	2	0
Cash used for investing activities	(124)	(88)
Financing Activities:
Additions to short-term debt, net	0	166
Dividends paid to shareholders	(212)	(191)
Distributions to noncontrolling interest holders	(54)	(57)
Repurchase of treasury shares	(346)	(373)
Exercise of stock options	38	65
Employee withholding tax on share-based payments	(44)	(50)
Cash used for financing activities	(618)	(440)
Effect of exchange rate changes on cash from continuing operations	60	(26)
Net change in cash and cash equivalents	(8)	86
Cash and cash equivalents at beginning of period	2,392	1,481
Cash and cash equivalents at end of period	$ 2,384	$ 1,567