Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Project related intangible assets, Weighted Average Useful Life		3 years
Project related intangible assets, Gross Carrying Amount		$ 166	$ 166
Project related intangible assets, Accumulated Amortization		(139)	(133)
Project related intangible assets, Net Carrying Amount		$ 27	33
Project related intangible liabilities, Weighted Average Useful Life		2 years
Project related intangible liabilities, Gross Carrying Amount		$ (109)	(109)
Project related intangible liabilities, Accumulated Amortization		101	99
Project related intangible liabilities, Net Carrying Amount		(8)	(10)
Total, Gross Carrying Amount	[1]	57	57
Total, Accumulated Amortization	[1]	(38)	(34)
Total, Net Carrying Amount	[1]	$ 19	$ 23

[1] Amortization expense is anticipated to be $10 million, $4 million, $3 million and $2 million for the remainder of 2020, 2021, 2022 and 2023, respectively.