CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 908	$ 1,015	$ 2,080
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	439	437	408
Provision for credit losses	1	3	4
Deferred income tax provision	(49)	1	(57)
Stock-based compensation expense	77	77	79
Gain on disposition of joint venture	0	0	(314)
Other, net	41	66	(54)
Changes in operating assets and liabilities:
Accounts receivable	(15)	246	81
Accounts payable and accrued expenses	(55)	(149)	35
Income taxes payable	(2)	(31)	(20)
Other assets and liabilities, net	(73)	53	(9)
Net cash provided by operating activities	1,272	1,718	2,233
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(611)	(144)	(331)
Proceeds from disposition of joint venture	0	0	755
Capital expenditures	(408)	(404)	(403)
(Increase) decrease in investments and other assets, net	(42)	5	0
Net cash (used in) provided by investing activities	(1,061)	(543)	21
Cash flows from financing activities:
Proceeds from borrowings	2,592	0	0
Repayments of debt	(1,844)	(2)	(2)
Purchases of treasury stock	(275)	(1,408)	(2,199)
Exercise of stock options	72	123	129
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(28)	(28)	(22)
Dividends paid	(314)	(305)	(309)
Distributions to noncontrolling interest partners	(57)	(73)	(99)
Other financing activities, net	14	(39)	(38)
Net cash provided by (used in) financing activities	160	(1,732)	(2,540)
Net change in cash and cash equivalents and restricted cash	371	(557)	(286)
Cash and cash equivalents and restricted cash, beginning of year	315	872	1,158
Cash and cash equivalents and restricted cash, end of year	$ 686	$ 315	$ 872