Goodwill and Other Intangible Assets - Amortization Expense Related to Amortizable Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Charged to cost of sales	$ 0	$ 0	$ 0	$ 1
Charged to amortization of intangibles	2	4	4	9
Total amortization	$ 2	$ 4	$ 4	$ 10