Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities:
Net income	$ 2,029	$ 1,717
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	60	61
Amortization of intangibles	94	92
Provision for losses on accounts receivable	16	17
Deferred income taxes	(14)	33
Stock-based compensation	60	53
Gain on dispositions	(16)	(49)
Pension settlement charges, net of taxes	2	85
Loss on extinguishment of debt	279	0
Other	50	49
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	172	(50)
Prepaid and other current assets	(52)	(59)
Accounts payable and accrued expenses	(97)	(54)
Unearned revenue	(158)	(27)
Other current liabilities	(28)	(82)
Net change in prepaid/accrued income taxes	28	40
Net change in other assets and liabilities	1	(54)
Cash provided by operating activities	2,426	1,772
Investing Activities:
Capital expenditures	(43)	(77)
Acquisitions, net of cash acquired	(189)	(25)
Proceeds from dispositions	9	85
Changes in short-term investments	19	(3)
Cash used for investing activities	(204)	(20)
Financing Activities:
Proceeds from issuance of senior notes, net	1,276	0
Payments on senior notes	(1,394)	0
Dividends paid to shareholders	(484)	(421)
Distributions to noncontrolling interest holders, net	(143)	(100)
Repurchase of treasury shares	(1,164)	(1,144)
Exercise of stock options	14	38
Employee withholding tax on share-based payments and other	(55)	(57)
Cash used for financing activities	(1,950)	(1,684)
Effect of exchange rate changes on cash	10	(7)
Net change in cash, cash equivalents, and restricted cash	282	61
Cash, cash equivalents, and restricted cash at beginning of period	2,886	1,958
Cash, cash equivalents, and restricted cash at end of period	$ 3,168	$ 2,019