Business Combination - Summary of Pro Forma Financial Information (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Net (loss) income	$ (1,864)	$ (114)	$ (57)		$ 45	$ 34	$ (2,035)	$ 79
Restructuring and integration costs	14			$ 31			103	106
Transaction costs	$ 14			5			$ 29	45
Debt extinguishment costs								10
Chicago Bridge & Iron Company N.V. [Member]
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Restructuring and integration costs				24				90
Transaction costs				4				35
Debt extinguishment costs				11				11
Chicago Bridge & Iron Company N.V. [Member] | Elimination of Restructuring, Integration and Transaction Costs [Member]
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Net (loss) income				$ 28				$ 136