Segments - Reconciliation of Segment EBITDA to Consolidated Net Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting [Abstract]
Segment EBITDA	$ 208		$ 217	$ 368	$ 376
Corporate expense and other items, net	(3)		(2)	2	(3)
Depreciation	(41)		(40)	(81)	(82)
Amortization of intangibles	(12)		(21)	(27)	(43)
Restructuring	(3)	(9)	(4)	(12)	(6)
Strategic transaction expenses and other items	1		(4)		(6)
Write-off of deferred financing costs			(2)		(2)
Recognition of unrealized gain on payment-in-kind note receivable			5	2	5
Stock compensation expense	(5)		(4)	(9)	(9)
Interest expense	(29)		(21)	(59)	(42)
Interest income	3		5	6	12
Income from continuing operations before income taxes	119		129	190	200
Income tax expense	33		35	67	62
Equity in earnings of affiliates	6		3	7	7
Income from continuing operations	92		97	130	145
Income (loss) from discontinued operations	(2)		(1)	(3)	1
Net income	$ 90		$ 96	$ 127	$ 146