Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 386	$ 448
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and other amortization	550	202
Amortization of acquisition-related intangible assets	1,099	89
Amortization of financing costs, debt discounts and other	24	105
Share-based compensation	202	34
Deferred income taxes	(94)	12
Gain on sale of businesses	(428)	(10)
Loss from investments in unconsolidated affiliates	16	10
Distributions from unconsolidated affiliates	12	0
Settlement of interest rate hedge contracts	0	(183)
Non-cash impairment charge	40	0
Other operating activities	(3)	(3)
Changes in assets and liabilities, net of effects from acquisitions and dispositions:
Trade accounts receivable	278	60
Prepaid expenses and other assets	62	(62)
Contract costs	(158)	(93)
Accounts payable and other liabilities	(54)	(28)
Contract liabilities	(13)	(2)
Net cash provided by operating activities	1,919	579
Cash flows from investing activities:
Capital expenditures, including capitalization of software costs	(488)	(210)
Proceeds from sale of businesses	584	10
Payments for acquisition of businesses, net of cash acquired and including working capital adjustments	(136)	54
Distributions from unconsolidated affiliates	66	7
Purchases of investments	0	(3)
Other investing activities	0	6
Net cash provided by (used in) investing activities	26	(136)
Cash flows from financing activities:
Debt proceeds	5,812	9,894
Debt repayments	(6,219)	(2,018)
Short-term borrowings, net	(1)	0
Payments of debt financing, redemption and other costs	(16)	(164)
Proceeds from issuance of treasury stock	86	56
Purchases of treasury stock, including employee shares withheld for tax obligations	(1,574)	(185)
Distributions paid to noncontrolling interests and redeemable noncontrolling interests	(52)	0
Other financing activities	5	0
Net cash used in financing activities	(1,959)	7,583
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(12)	0
Net change in cash, cash equivalents and restricted cash	(26)	8,026
Cash, cash equivalents and restricted cash, beginning balance	933	415
Cash, cash equivalents and restricted cash, ending balance	$ 907	$ 8,441