CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 623	$ 1,140
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	213	201
Provision for credit losses	1	2
Deferred income tax benefit	(20)	(89)
Stock-based compensation expense	37	39
Gain on disposition of investment	0	(314)
Other, net	33	1
Changes in operating assets and liabilities:
Accounts receivable	150	265
Accounts payable and accrued expenses	(201)	(199)
Income taxes payable	(4)	85
Other assets and liabilities, net	50	60
Net cash provided by operating activities	882	1,191
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(106)	(231)
Capital expenditures	(139)	(170)
Proceeds from disposition of investment	0	755
Increase in investments and other assets	(6)	(10)
Net cash (used in) provided by investing activities	(251)	344
Cash flows from financing activities:
Repayments of debt	(1)	(1)
Purchases of treasury stock	(573)	(1,910)
Exercise of stock options	68	68
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(27)	(22)
Dividends paid	(152)	(156)
Distributions to noncontrolling interest partners	(36)	(53)
Other financing activities, net	8	(59)
Net cash used in financing activities	(713)	(2,133)
Net change in cash and cash equivalents and restricted cash	(82)	(598)
Cash and cash equivalents and restricted cash, beginning of period	872	1,158
Cash and cash equivalents and restricted cash, end of period	$ 790	$ 560