Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating cash flows:
Net income before non-controlling interests	$ 2,046	$ 1,773	$ 1,670
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization of fixed assets and capitalized software	390	333	311
Amortization of intangible assets	351	314	183
Non cash lease expense	355	315	0
Adjustments and payments related to contingent consideration liability	(22)	27	(4)
Loss on deconsolidation of entity	0	0	11
Charge for early extinguishment of debt	0	32	0
Provision (benefit) for deferred income taxes	40	84	(39)
Loss (gain) on investments	22	(22)	12
Loss (gain) on disposition of assets	24	56	(48)
Share-based compensation expense	290	252	193
Change in fair value of acquisition-related derivative contracts	0	8	441
Changes in assets and liabilities:
Net receivables	(75)	(130)	(78)
Other current assets	(66)	(13)	26
Other assets	86	(1)	(37)
Accounts payable and accrued liabilities	241	120	23
Accrued compensation and employee benefits	207	154	68
Accrued income taxes	60	42	(40)
Contributions to pension and other benefit plans and current year credit	(356)	(369)	(291)
Other liabilities	108	(172)	9
Operating lease liabilities	(351)	(327)	0
Effect of exchange rate changes	32	(115)	18
Net cash provided by operations	3,382	2,361	2,428
Financing cash flows:
Purchase of treasury shares	0	(485)	(675)
Net increase in short term borrowings	1,000	300	0
Proceeds from issuance of debt	737	6,459	591
Repayments of debt	(2,515)	(1,064)	(263)
Payment of bridge loan fees	0	0	(35)
Payments for early extinguishment of debt	0	(585)	0
Purchase of non-controlling interests	(3)	(80)	0
Acquisition-related derivative payments	0	(337)	0
Shares withheld for taxes on vested units – treasury shares	(132)	(89)	(67)
Issuance of common stock from treasury shares	132	158	93
Payments of deferred and contingent consideration for acquisitions	(122)	(65)	(117)
Distributions of non-controlling interests	(34)	(16)	(30)
Dividends paid	(943)	(890)	(807)
Net cash (used for) provided by financing activities	(1,880)	3,306	(1,310)
Investing cash flows:
Capital expenditures	(348)	(421)	(314)
Net sales (purchases) of long-term investments	107	183	4
Purchase of equity investment	0	(91)	0
Proceeds from sales of fixed assets	6	10	3
Dispositions	98	229	110
Acquisitions	(668)	(5,505)	(884)
Other, net	(9)	(76)	(8)
Net cash used for investing activities	(814)	(5,671)	(1,089)
Effect of exchange rate changes on cash and cash equivalents	246	93	(168)
Increase (decrease) in cash and cash equivalents	934	89	(139)
Cash and cash equivalents at beginning of year	1,155	1,066	1,205
Cash and cash equivalents at end of year	$ 2,089	$ 1,155	$ 1,066