Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Detail) - USD ($) $ in Millions		9 Months Ended
		Sep. 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		$ 245	$ 259
Project related intangible assets, Accumulated Amortization		(177)	(122)
Project related intangible assets, Net Carrying Amount		$ 68	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		85	43
Project related intangible liabilities, Net Carrying Amount		(24)	(66)
Total, Gross Carrying Amount	[1]	136	150
Total, Accumulated Amortization	[1]	(92)	(79)
Total, Net Carrying Amount	[1]	$ 44	$ 71

[1] The decrease in project-related intangible assets during the nine months ended September 30, 2019 primarily related to amortization expense of $27 million, impairment of $3 million and the impact of foreign currency translation. Amortization expense is anticipated to be $7 million, $22 million, $5 million, $8 million and $2 million for the remainder of 2019, 2020, 2021, 2022 and 2023, respectively.