CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 890	$ 641
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	263	247
Provision for credit losses	18	9
Deferred income tax provision	12	15
Stock-based compensation expense	63	44
Other, net	(60)	(44)
Changes in operating assets and liabilities:
Accounts receivable	(355)	(113)
Accounts payable and accrued expenses	514	80
Income taxes payable	95	9
Termination of interest rate swap agreements	40	0
Other assets and liabilities, net	(16)	7
Net cash provided by operating activities	1,464	895
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(329)	(56)
Capital expenditures	(256)	(228)
Increase in investments and other assets	(19)	(27)
Net cash used in investing activities	(604)	(311)
Cash flows from financing activities:
Proceeds from borrowings	749	1,484
Repayments of debt	(1,002)	(1,448)
Purchases of treasury stock	(75)	(153)
Exercise of stock options	144	98
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(13)	(16)
Dividends paid	(222)	(215)
Distributions to noncontrolling interest partners	(34)	(39)
Other financing activities, net	6	4
Net cash used in financing activities	(447)	(285)
Net change in cash and cash equivalents and restricted cash	413	299
Cash and cash equivalents and restricted cash, beginning of period	1,192	135
Cash and cash equivalents and restricted cash, end of period	$ 1,605	$ 434