Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ (3)	$ (10)	$ (8)	[1]	$ (14)
Asset impairments	(1)	0	(1)		0
Commercial disputes	0	0	0		(1)
Other (charges) gains, net	$ (4)	$ (10)	(9)		$ (15)
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.