Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Rental and lease expense incurred	$ 86	$ 98	$ 113
Standard product warranty description	obligate us to repair, replace or credit the purchase price of a covered product back to the buyer.