Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities:
Net income	$ 689	$ 453
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	20	20
Amortization of intangibles	29	32
Provision for losses on accounts receivable	10	7
Deferred income taxes	(6)	28
Stock-based compensation	11	12
Gain on disposition	(7)	0
Pension settlement charge, net of taxes	0	85
Other	29	8
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	76	(87)
Prepaid and other current assets	(52)	(34)
Accounts payable and accrued expenses	(251)	(161)
Unearned revenue	(12)	(3)
Accrued legal settlements	0	(1)
Other current liabilities	49	(59)
Net change in prepaid/accrued income taxes	125	57
Net change in other assets and liabilities	(30)	(64)
Cash provided by operating activities	680	293
Investing Activities:
Capital expenditures	(11)	(20)
Acquisitions, net of cash acquired	(183)	(1)
Changes in short-term investments	11	0
Cash used for investing activities	(183)	(21)
Financing Activities:
Dividends paid to shareholders	(161)	(141)
Distributions to noncontrolling interest holders, net	(51)	(18)
Repurchase of treasury shares	(1,153)	(644)
Exercise of stock options	8	23
Employee withholding tax on share-based payments	(44)	(49)
Cash used for financing activities	(1,401)	(829)
Effect of exchange rate changes on cash	(30)	35
Net change in cash, cash equivalents, and restricted cash	(934)	(522)
Cash, cash equivalents, and restricted cash at beginning of period	2,886	1,958
Cash, cash equivalents, and restricted cash at end of period	$ 1,952	$ 1,436