Segments - Reconciliation of Segment EBITDA to Consolidated Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting [Abstract]
Segment EBITDA	$ 182	$ 208	$ 358	$ 368
Corporate expense and other items, net	(2)	(3)	(2)	2
Depreciation	(39)	(41)	(78)	(81)
Amortization of intangibles	(4)	(12)	(10)	(27)
Restructuring	(11)	(3)	(12)	(12)
Stock compensation expense	(5)	(5)	(8)	$ (9)
Strategic transaction expenses and other items	$ (1)	$ 1	(2)
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	$ (27)	$ (29)	$ (55)	(59)
Interest income	4	3	7	6
Income from continuing operations before income taxes	97	119	201	190
Income tax expense	36	33	67	67
Equity in earnings of affiliates	2	6	3	7
Income from continuing operations	63	92	137	130
Loss from discontinued operations	0	(2)	0	(3)
Net income	$ 63	$ 90	$ 137	$ 127