Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ (3)	$ (6)	$ (11)	[1]	$ (20)
Asset impairments	0	(1)	(1)		(1)
Commercial disputes	0	3	0		2
Other (charges) gains, net	$ (3)	$ (4)	(12)		$ (19)
Pension Plan [Member]
Restructuring Cost and Reserve [Line Items]
One time termination benefits included in Benefit Obligation			$ (3)

[1] Includes $3 million of special termination benefits included in Benefit obligations in the unaudited consolidated balance sheets.