Business Combination - Summary of Preliminary Purchase Price Allocation (Parenthetical) (Detail) - USD ($) $ in Millions			3 Months Ended	12 Months Ended
	May 10, 2018		Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Proceeds from asset dispositions				$ 69	$ 56	$ 2
Goodwill				2,654
Chicago Bridge & Iron Company N.V. [Member]
Business Acquisition [Line Items]
Proceeds from asset dispositions			$ 52
Business combination, fair value adjustment in unconsolidated affiliates	$ 217
Business combination, fair value adjustment in unconsolidated affiliates amortized investment	148
Accrued provisions for estimated losses on projects	374
Project related intangible assets, net	259
Project related intangible liabilities, net	109
Goodwill	$ 4,822	[1]		4,800
Goodwill deductible for tax purposes				$ 1,700
Chicago Bridge & Iron Company N.V. [Member] | Minimum [Member]
Business Acquisition [Line Items]
Business combination, fair value adjustment in unconsolidated affiliates related amortization period	2 years
Business combination, Intangible assets amortized liabilities projects progress	2 years
Chicago Bridge & Iron Company N.V. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Business combination, fair value adjustment in unconsolidated affiliates related amortization period	30 years
Business combination, Intangible assets amortized liabilities projects progress	6 years

[1] Goodwill resulted from the acquired established workforce, which does not qualify for separate recognition, as well as expected future cost savings and revenue synergies associated with the combined operations. Of the $4.8 billion of estimated goodwill recorded in conjunction with the Combination, $1.7 billion is deductible for tax purposes. See Note 9, Goodwill and Other Intangible Assets, for our allocation of goodwill by reporting segment and discussion of impairment charges recorded during the fourth quarter of 2018.