Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 2,582	$ 1,403	$ 975
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and other amortization	1,320	1,158	1,077
Amortization of acquisition-related intangible assets	1,849	2,038	2,133
Amortization of financing costs and debt discounts	43	52	47
Share-based compensation	323	239	369
Deferred income taxes	(558)	(262)	71
Net gain on sale of businesses and other assets	(54)	0	(464)
Income from investments in unconsolidated affiliates	(220)	(100)	0
Distributions from unconsolidated affiliates	73	34	42
Non-cash impairment charges	14	15	124
Other operating activities	(10)	(48)	(16)
Changes in assets and liabilities, net of effects from acquisitions and dispositions:
Trade accounts receivable	(770)	(358)	320
Prepaid expenses and other assets	(253)	(248)	(167)
Contract costs	(290)	(269)	(289)
Accounts payable and other liabilities	511	303	(146)
Contract liabilities	58	77	71
Net cash provided by operating activities	4,618	4,034	4,147
Cash flows from investing activities:
Capital expenditures, including capitalized software and other intangibles	(1,479)	(1,160)	(900)
Net proceeds from sale of businesses and other assets	246	0	579
Payments for acquisitions of businesses, net of cash acquired	(988)	(848)	(139)
Distributions from unconsolidated affiliates	138	115	109
Purchases of investments	(52)	(256)	(1)
Proceeds from sale of investments	23	519	11
Net cash used in investing activities	(2,112)	(1,630)	(341)
Cash flows from financing activities:
Debt proceeds	1,624	6,435	8,897
Debt repayments, including debt financing costs	(3,325)	(7,881)	(10,934)
Net proceeds from (repayments of) commercial paper and short-term borrowings	1,837	1,741	(6)
Proceeds from issuance of treasury stock	149	140	133
Purchases of treasury stock, including employee shares withheld for tax obligations	(2,677)	(2,786)	(1,826)
Settlement activity, net	(78)	711	405
Distributions paid to noncontrolling interests and redeemable noncontrolling interests	(42)	(62)	(104)
Payments of acquisition-related contingent consideration	(2)	(37)	(18)
Other financing activities	36	(2)	22
Net cash used in financing activities	(2,478)	(1,741)	(3,431)
Effect of exchange rate changes on cash and cash equivalents	(41)	(27)	16
Net change in cash and cash equivalents	(13)	636	391
Cash and cash equivalents, beginning balance	3,205	2,569	2,178
Cash and cash equivalents, ending balance	$ 3,192	$ 3,205	$ 2,569