Segments - Reconciliation of Segment EBITDA to Consolidated Net Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting [Abstract]
Segment EBITDA	$ 194	$ 198	$ 562	$ 574
Corporate expense and other items, net	4		6	(3)
Depreciation	(41)	(41)	(122)	(123)
Amortization of intangibles	(11)	(22)	(38)	(65)
Restructuring	(2)	(8)	(14)	(14)
Strategic transaction expenses and other items	4		4	(6)
Write-off of deferred financing costs				(2)
Recognition of unrealized gain on payment-in-kind note receivable			2	5
Stock compensation expense	(2)	(5)	(11)	(14)
Interest expense	(30)	(27)	(89)	(69)
Interest income	5	8	11	20
Income from continuing operations before income taxes	121	103	311	303
Income tax expense	29	34	96	96
Equity in earnings of affiliates	2	3	9	10
Income from continuing operations	94	72	224	217
Loss from discontinued operations	(1)	(1)	(4)	0
Net income	$ 93	$ 71	$ 220	$ 217