Joint Venture and Consortium Arrangements - Summary of Aggregate Financial Information (Detail) - CLG and McDermott/CTCI [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Schedule Of Equity Method Investments [Line Items]
Revenues	$ 225
Cost of operations	195
Gross profit	30
Operating income	25
Net income	$ 28	[1]

[1] The results of CLG and McDermott/CTCI for the three months ended March 31, 2018 were prior to the Combination Date and are not presented.