CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 176	$ 189
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	84	74
Provision for doubtful accounts	4	3
Deferred income tax provision	3	24
Stock-based compensation expense	17	19
Other, net	(18)	(1)
Changes in operating assets and liabilities:
Accounts receivable	(71)	(97)
Accounts payable and accrued expenses	32	(68)
Income taxes payable	43	5
Other assets and liabilities, net	5	32
Net cash provided by operating activities	275	180
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(56)	(130)
Capital expenditures	(47)	(73)
Increase in investments and other assets	(7)	(1)
Net cash used in investing activities	(110)	(204)
Cash flows from financing activities:
Proceeds from borrowings	1,139	935
Repayments of debt	(802)	(832)
Purchases of treasury stock	(53)	(50)
Exercise of stock options	20	34
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(15)	(20)
Dividends paid	(72)	(61)
Distributions to noncontrolling interest partners	(12)	(15)
Contributions from noncontrolling interest partners	0	2
Other financing activities, net	(41)	18
Net cash provided by financing activities	164	11
Net change in cash and cash equivalents and restricted cash	329	(13)
Cash and cash equivalents and restricted cash, beginning of period	135	137
Cash and cash equivalents and restricted cash, end of period	464	124
Cash and cash equivalents	135
Cash and cash equivalents and restricted cash, end of period	$ 135	$ 137