Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 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		$ 257	$ 259
Project related intangible assets, Accumulated Amortization		(143)	(122)
Project related intangible assets, Net Carrying Amount		$ 114	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		57	43
Project related intangible liabilities, Net Carrying Amount		(52)	(66)
Total, Gross Carrying Amount	[1]	148	150
Total, Accumulated Amortization	[1]	(86)	(79)
Total, Net Carrying Amount	[1]	$ 62	$ 71

[1] The decrease in project-related intangible assets during the three months ended March 31, 2019 primarily related to amortization expense of $8 million and the impact of foreign currency translation.