Segments - Reconciliation of Segment EBITDA to Consolidated Net Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting [Abstract]
Segment EBITDA	$ 169	$ 194	$ 527	$ 562
Corporate expense and other items, net	(2)	4	(4)	6
Depreciation	(39)	(41)	(117)	(122)
Amortization of intangibles	(4)	(11)	(14)	(38)
Restructuring	(1)	(2)	(13)	(14)
Stock compensation expense	(6)	(2)	(14)	(11)
Strategic transaction expenses and other items	(9)	$ 4	(11)	$ 4
Impairment of long-lived assets	$ (36)		(36)
Gain on derecognition of noncontrolling interest			5
Loss on extinguishment of debt			$ (2)
Recognition of unrealized gain on payment-in-kind note receivable				$ 2
Interest expense	$ (31)	$ (30)	$ (86)	(89)
Interest income	4	5	11	11
Income from continuing operations before income taxes	45	121	246	311
Income tax expense (benefit)	(77)	29	(10)	96
Equity in earnings of affiliates	0	2	3	9
Income from continuing operations	122	94	259	224
Loss from discontinued operations	0	(1)	0	(4)
Net income	$ 122	$ 93	$ 259	$ 220