Business Segments - Equity In Net Income of Investees Accounted For By Equity Method (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Equity in income	$ 0	$ 0	$ 0
Operating Segments
Segment Reporting Information [Line Items]
Equity in income	(16)	(28)	(31)
Operating Segments | North America
Segment Reporting Information [Line Items]
Equity in income	(3)	(5)	(8)
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Equity in income	(1)	0	0
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Equity in income	(12)	(23)	(23)
Guarantor Subsidiaries
Segment Reporting Information [Line Items]
Equity in income	$ (19)	$ (28)	$ (5)