Goodwill and Other Intangible Assets - Amortization Expense Related to Amortizable Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Charged to cost of sales	$ 1	$ 2	$ 7
Charged to amortization of intangibles	8	14	42
Total amortization	$ 9	$ 16	$ 49