Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Jun. 30, 2014	Apr. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Interest incurred			$ 74	$ 85	$ 9
Interest capitalized			23	24	9
Depreciation expense			$ 100	93	85
Proceeds from Assets Sale	$ 14	$ 32		25	32
Gain from Assets Sale	11	$ 25		$ 11	$ 13
Property plant and equipment improvement	$ 1