CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 253	$ 318
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	156	142
Provision for doubtful accounts	148	139
Deferred income tax benefit	(26)	(11)
Stock-based compensation expense	25	17
Excess tax benefits from stock-based compensation arrangements	0	(3)
Gain on sale of business	0	(22)
Other, net	(2)	(1)
Changes in operating assets and liabilities:
Accounts receivable	(191)	(213)
Accounts payable and accrued expenses	(39)	(68)
Income taxes payable	44	(35)
Other assets and liabilities, net	(4)	(8)
Net cash provided by operating activities	364	255
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(723)	(180)
Proceeds from sale of businesses	0	266
Capital expenditures	(117)	(105)
Increase in investments and other assets	(1)	0
Net cash used in investing activities	(841)	(19)
Cash flows from financing activities:
Proceeds from borrowings	1,738	578
Repayments of debt	(1,159)	(415)
Purchases of treasury stock	(57)	(512)
Exercise of stock options	30	63
Excess tax benefits from stock-based compensation arrangements	0	3
Dividends paid	(91)	(95)
Distributions to noncontrolling interests	(14)	(13)
Other financing activities, net	(13)	(10)
Net cash provided by (used in) financing activities	434	(401)
Net change in cash and cash equivalents	(43)	(165)
Change in cash and cash equivalents included in assets held for sale	0	17
Cash and cash equivalents, beginning of period	187	296
Cash and cash equivalents, end of period	$ 144	$ 148