Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Net income	$ 1,666	$ 1,531
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	42	39
Amortization of intangibles	53	61
Provision for losses on accounts receivable	13	14
Deferred income taxes	(47)	3
Stock-based compensation	50	22
Gain on dispositions	(2)	(8)
Pension settlement charges, net of taxes	0	2
Other	22	27
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	153	30
Prepaid and other current assets	(71)	(48)
Accounts payable and accrued expenses	(199)	(192)
Unearned revenue	(76)	(56)
Other current liabilities	(26)	(16)
Net change in prepaid/accrued income taxes	100	247
Net change in other assets and liabilities	13	(39)
Cash provided by operating activities	1,691	1,617
Investing Activities:
Capital expenditures	(25)	(18)
Acquisitions, net of cash acquired	(10)	(185)
Proceeds from dispositions	2	2
Changes in short-term investments	0	15
Cash used for investing activities	(33)	(186)
Financing Activities:
Dividends paid to shareholders	(371)	(323)
Distributions to noncontrolling interest holders, net	(118)	(92)
Repurchase of treasury shares	0	(1,153)
Exercise of stock options	7	12
Employee withholding tax on share-based payments	(44)	(54)
Cash used for financing activities	(526)	(1,610)
Effect of exchange rate changes on cash	(33)	(23)
Net change in cash, cash equivalents, and restricted cash	1,099	(202)
Cash, cash equivalents, and restricted cash at beginning of period	4,122	2,886
Cash, cash equivalents, and restricted cash at end of period	$ 5,221	$ 2,684