Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Project related intangible assets, Gross Carrying Amount	$ 259
Project related intangible assets, Accumulated Amortization	(122)
Project related intangible assets, Net Carrying Amount	$ 137
Project related intangible assets, Accumulated Amortization	4 years
Project related intangible liabilities, Gross Carrying Amount	$ (109)
Project related intangible liabilities, Accumulated Amortization	43
Project related intangible liabilities, Net Carrying Amount	$ (66)
Project related intangible liabilities, Weighted Average Life	2 years
Total, Gross Carrying Amount	$ 150	[1]
Total, Accumulated Amortization	(79)	[1]
Total, Net Carrying Amount	$ 71	[1]

[1] All project-related intangible assets at December 31, 2018 resulted from the Combination. Amortization expense, included in the Project intangibles and inventory related amortization line in our Consolidated Statements of Operations, was $79 million for the year ended December 31, 2018 and is anticipated to be $33 million, $23 million, $5 million, $8 million and $7 million in 2019, 2020, 2021, 2022 and 2023, respectively.