CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 373	$ 490
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106	101
Provision for credit losses	0	2
Deferred income tax benefit	(43)	(17)
Stock-based compensation expense	18	18
Other, net	4	(2)
Changes in operating assets and liabilities:
Accounts receivable	72	138
Accounts payable and accrued expenses	(165)	(164)
Income taxes payable	95	163
Other assets and liabilities, net	20	2
Net cash provided by operating activities	480	731
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(105)	0
Capital expenditures	(63)	(86)
Increase in investments and other assets	(1)	(7)
Net cash used in investing activities	(169)	(93)
Cash flows from financing activities:
Repayments of debt	(1)	(1)
Purchases of treasury stock	(373)	(410)
Exercise of stock options	10	17
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(27)	(21)
Dividends paid	(74)	(75)
Distributions to noncontrolling interest partners	(20)	(29)
Other financing activities, net	14	(47)
Net cash used in financing activities	(471)	(566)
Net change in cash and cash equivalents and restricted cash	(160)	72
Cash and cash equivalents and restricted cash, beginning of period	872	1,158
Cash and cash equivalents and restricted cash, end of period	$ 712	$ 1,230