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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 $ 1,015 $ 2,080 $ 1,499
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 437 408 361
Provision for credit losses 3 4 19
Deferred income tax provision 1 (57) 85
Stock-based compensation expense 77 79 97
Gain on disposition of joint venture 0 (314) 0
Other, net 66 (54) (78)
Changes in operating assets and liabilities:      
Accounts receivable 246 81 (455)
Accounts payable and accrued expenses (149) 35 452
Income taxes payable (31) (20) 22
Termination of interest rate swap agreements 0 0 40
Other assets and liabilities, net 53 (9) (37)
Net cash provided by operating activities 1,718 2,233 2,005
Cash flows from investing activities:      
Business acquisitions, net of cash acquired (144) (331) (330)
Proceeds from disposition of joint venture 0 755 0
Capital expenditures (404) (403) (418)
Decrease (increase) in investments and other assets, net 5 0 (24)
Net cash (used in) provided by investing activities (543) 21 (772)
Cash flows from financing activities:      
Proceeds from borrowings 0 0 749
Repayments of debt (2) (2) (1,554)
Purchases of treasury stock (1,408) (2,199) (325)
Exercise of stock options 123 129 189
Employee payroll tax withholdings on stock issued under stock-based compensation plans (28) (22) (15)
Dividends paid (305) (309) (297)
Distributions to noncontrolling interest partners (73) (99) (58)
Other financing activities, net (39) (38) 44
Net cash used in financing activities (1,732) (2,540) (1,267)
Net change in cash and cash equivalents and restricted cash (557) (286) (34)
Cash and cash equivalents and restricted cash, beginning of year 872 1,158 1,192
Cash and cash equivalents and restricted cash, end of year $ 315 $ 872 $ 1,158