Costs Associated with Exit and Restructuring Costs Associated with Exit and Restructuring - Amounts in the Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 10	$ 15	$ 7
Accrued liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	7	10
Other long-term liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 3	$ 5