Costs Associated with Exit and Restructuring Activities - Liabilities Related to Exit and Restructuring Activities Included in the Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Apr. 01, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Total liabilities related to exit and restructuring activities	$ 7	$ 8	$ 11	$ 10
Accrued liabilities
Restructuring Cost and Reserve [Line Items]
Total liabilities related to exit and restructuring activities	6	6
Other long-term liabilities
Restructuring Cost and Reserve [Line Items]
Total liabilities related to exit and restructuring activities	$ 1	$ 2