CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 199	$ 253
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	153	156
Provision for doubtful accounts	158	148
Deferred income tax benefit	(5)	(26)
Stock-based compensation expense	27	25
Excess tax benefits from stock-based compensation arrangements	(3)	0
Other, net	(5)	(2)
Changes in operating assets and liabilities:
Accounts receivable	(163)	(191)
Accounts payable and accrued expenses	(49)	(39)
Income taxes payable	17	44
Other assets and liabilities, net	(2)	(4)
Net cash provided by operating activities	327	364
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(6)	(723)
Capital expenditures	(117)	(117)
Increase in investments and other assets	0	(1)
Net cash used in investing activities	(123)	(841)
Cash flows from financing activities:
Proceeds from borrowings	1,829	1,738
Repayments of debt	(1,821)	(1,159)
Purchases of treasury stock	(149)	(57)
Exercise of stock options	55	30
Excess tax benefits from stock-based compensation arrangements	3	0
Dividends paid	(103)	(91)
Distributions to noncontrolling interests	(19)	(14)
Other financing activities, net	(41)	(13)
Net cash (used in) provided by financing activities	(246)	434
Net change in cash and cash equivalents	(42)	(43)
Cash and cash equivalents, beginning of period	192	187
Cash and cash equivalents, end of period	$ 150	$ 144