Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Detail) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Project related intangible assets, Accumulated Amortization		4 years
Project related intangible assets, Gross Carrying Amount		$ 259	$ 259
Project related intangible assets, Accumulated Amortization		(165)	(122)
Project related intangible assets, Net Carrying Amount		$ 94	137
Project related intangible liabilities, Weighted Average Life		2 years
Project related intangible liabilities, Gross Carrying Amount		$ (109)	(109)
Project related intangible liabilities, Accumulated Amortization		71	43
Project related intangible liabilities, Net Carrying Amount		(38)	(66)
Total, Gross Carrying Amount	[1]	150	150
Total, Accumulated Amortization	[1]	(94)	(79)
Total, Net Carrying Amount	[1]	$ 56	$ 71

[1] The decrease in project-related intangible assets during the six months ended June 30, 2019 primarily related to amortization expense of $16 million and the impact of foreign currency translation.