Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net income	$ 430	$ 323
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	19	18
Amortization of intangibles	24	24
Provision for losses on accounts receivable	5	3
Deferred income taxes	(1)	(1)
Stock-based compensation	19	14
Other	14	31
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	12	(7)
Prepaid and other current assets	9	(12)
Accounts payable and accrued expenses	(235)	(237)
Unearned revenue	(6)	39
Accrued legal settlements	(1)	(108)
Other current liabilities	(58)	24
Net change in prepaid/accrued income taxes	146	105
Net change in other assets and liabilities	(24)	(31)
Cash provided by operating activities	353	185
Investing Activities:
Capital expenditures	(23)	(16)
Acquisitions, net of cash acquired	(1)	(7)
Proceeds from dispositions	2	0
Changes in short-term investments	0	(1)
Cash used for investing activities	(22)	(24)
Financing Activities:
Additions to short-term debt, net	0	329
Dividends paid to shareholders	(106)	(96)
Dividends and other payments paid to noncontrolling interests	(24)	(33)
Repurchase of treasury shares	(201)	(226)
Exercise of stock options	29	31
Employee withholding tax on share-based payments	(44)	(46)
Cash used for financing activities	(346)	(41)
Effect of exchange rate changes on cash from continuing operations	34	(1)
Net change in cash and cash equivalents	19	119
Cash and cash equivalents at beginning of period	2,392	1,481
Cash and cash equivalents at end of period	$ 2,411	$ 1,600