Foreign Currency Loss Related to Venezuela Revaluation (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intercompany Foreign Currency Balance [Line Items]
Provision for losses on inventory		$ 54	$ 105	$ 94
Asset write-offs and asset impairments		$ 3	$ 5	60
Venezuela
Intercompany Foreign Currency Balance [Line Items]
Foreign currency loss related to Venezuela revaluation	[1]			89
Venezuela | Foreign Currency Gain (Loss)
Intercompany Foreign Currency Balance [Line Items]
Provision for losses on inventory				4
Asset write-offs and asset impairments				$ 3

[1] For additional information, see Note 7. Foreign Currency Loss Related to Venezuela Revaluation.