Goodwill and Other Intangible Assets - Amortization Expense Related to Amortizable Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Charged to cost of sales	$ 1	$ 0	$ 1	$ 1
Charged to amortization of intangibles	2	4	6	13
Total amortization	$ 3	$ 4	$ 7	$ 14