Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 662	$ 673
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and other amortization	833	386
Amortization of acquisition-related intangible assets	1,603	476
Amortization of financing costs, debt discounts and other	36	116
Net foreign currency gain on financing activities	0	(50)
Share-based compensation	286	121
Deferred income taxes	(125)	26
Gain on sale of businesses	(464)	(10)
Income from investments in unconsolidated affiliates	(3)	(12)
Distributions from unconsolidated affiliates	12	6
Settlement of interest rate hedge contracts	0	(183)
Non-cash impairment charge	44	0
Other operating activities	(4)	(3)
Changes in assets and liabilities, net of effects from acquisitions and dispositions:
Trade accounts receivable	460	151
Prepaid expenses and other assets	(150)	(41)
Contract costs	(229)	(141)
Accounts payable and other liabilities	34	117
Contract liabilities	(34)	(15)
Net cash provided by operating activities	2,961	1,617
Cash flows from investing activities:
Capital expenditures, including capitalized software and other intangibles	(689)	(431)
Proceeds from sale of businesses	578	39
Payments for acquisition of businesses, net of cash acquired and including working capital adjustments	(137)	(16,004)
Distributions from unconsolidated affiliates	94	85
Purchases of investments	0	(4)
Other investing activities	0	6
Net cash used in investing activities	(154)	(16,309)
Cash flows from financing activities:
Debt proceeds	8,125	18,855
Debt repayments	(9,307)	(3,051)
Short-term borrowings, net	(28)	0
Payments of debt financing, redemption and other costs	(16)	(247)
Proceeds from issuance of treasury stock	108	116
Purchases of treasury stock, including employee shares withheld for tax obligations	(1,612)	(271)
Distributions paid to noncontrolling interests and redeemable noncontrolling interests	(61)	(46)
Other financing activities	6	(5)
Net cash (used in) provided by financing activities	(2,785)	15,351
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(4)	(4)
Net change in cash, cash equivalents and restricted cash	18	655
Cash, cash equivalents and restricted cash, beginning balance	933	415
Cash, cash equivalents and restricted cash, ending balance	$ 951	$ 1,070