CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 324	$ 199
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	123	153
Provision for doubtful accounts	167	158
Deferred income tax benefit	(4)	(5)
Stock-based compensation expense	36	27
Gain on disposition of business	(118)	0
Other, net	9	(5)
Changes in operating assets and liabilities:
Accounts receivable	(249)	(163)
Accounts payable and accrued expenses	23	(42)
Income taxes payable	141	17
Other assets and liabilities, net	12	(2)
Net cash provided by operating activities	464	337
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(135)	(6)
Proceeds from sale of businesses	275	0
Capital expenditures	(104)	(117)
Increase in investments and other assets	(9)	0
Net cash provided by (used in) investing activities	27	(123)
Cash flows from financing activities:
Proceeds from borrowings	1,869	1,829
Repayments of debt	(1,720)	(1,821)
Purchases of treasury stock	(390)	(149)
Exercise of stock options	38	55
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(9)	(6)
Dividends paid	(111)	(103)
Distributions to noncontrolling interests	(19)	(19)
Other financing activities, net	1	(42)
Net cash used in financing activities	(341)	(256)
Net change in cash and cash equivalents	150	(42)
Cash and cash equivalents, beginning of period	133	192
Cash and cash equivalents, end of period	$ 283	$ 150