Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities:
Net income	$ 2,527	$ 2,029
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	63	60
Amortization of intangibles	74	94
Provision for losses on accounts receivable	16	16
Deferred income taxes	1	(14)
Stock-based compensation	90	60
Gain on dispositions	(5)	(16)
Loss on extinguishment of debt	0	279
Other	32	52
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	122	172
Prepaid and other current assets	(66)	(52)
Accounts payable and accrued expenses	(85)	(97)
Unearned revenue	(159)	(158)
Other current liabilities	(35)	(28)
Net change in prepaid/accrued income taxes	67	28
Net change in other assets and liabilities	16	1
Cash provided by operating activities	2,658	2,426
Investing Activities:
Capital expenditures	(33)	(43)
Acquisitions, net of cash acquired	(19)	(189)
Proceeds from dispositions	11	9
Changes in short-term investments	(1)	19
Cash used for investing activities	(42)	(204)
Financing Activities:
Proceeds from issuance of senior notes, net	0	1,276
Payments on senior notes	0	(1,394)
Dividends paid to shareholders	(557)	(484)
Distributions to noncontrolling interest holders, net	(171)	(143)
Repurchase of treasury shares	0	(1,164)
Exercise of stock options	10	14
Employee withholding tax on share-based payments	(54)	(55)
Cash used for financing activities	(772)	(1,950)
Effect of exchange rate changes on cash	(59)	10
Net change in cash, cash equivalents, and restricted cash	1,785	282
Cash, cash equivalents, and restricted cash at beginning of period	4,122	2,886
Cash, cash equivalents, and restricted cash at end of period	$ 5,907	$ 3,168