Business Combination - Summary of Pro Forma Financial Information (Parenthetical) (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Restructuring and integration costs	$ 28,000,000	[1]	$ 31,000,000	[1]	$ 63,000,000	[1]	$ 12,000,000	[1]	$ 134,000,000	$ 0	$ 11,000,000
Transaction costs	$ 3,000,000	[2]	$ 5,000,000	[2]	$ 37,000,000	[2]	$ 3,000,000	[2]	48,000,000	9,000,000
Debt extinguishment costs									10,000,000
Chicago Bridge & Iron Company N.V. [Member]
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Restructuring and integration costs									112,000,000
Transaction costs									37,000,000
Debt extinguishment costs									$ 11,000,000
Restructuring costs										$ 81,000,000	$ 7,000,000

[1] Restructuring and integration costs primarily relate to costs to achieve our CPI. See Note 12, Restructuring and Integration Costs, for further discussion.

[2] Transaction costs relate to professional service fees (including audit, legal and advisory services) associated with the Combination. See Note 3, Business Combination, for further discussion.