Business Combination - Summary of Final Purchase Price Allocation (Parenthetical) (Detail) - USD ($) $ in Millions			3 Months Ended	12 Months Ended
		May 10, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Business Acquisition [Line Items]
Proceeds from asset disposals, net				$ 83	$ 69		$ 56
Goodwill				1,286	2,654	[1]
NCSA [Member]
Business Acquisition [Line Items]
Goodwill	[1]				1,041
MENA [Member]
Business Acquisition [Line Items]
Goodwill				50	46	[1]
Technology [Member]
Business Acquisition [Line Items]
Goodwill				1,139	$ 1,146	[1]
Chicago Bridge & Iron Company N.V. [Member]
Business Acquisition [Line Items]
Proceeds from asset disposals, net			$ 52
Business combination, fair value adjustment in unconsolidated affiliates		$ 215
Business combination, fair value adjustment in unconsolidated affiliates amortized investment		146
Accrued provisions for estimated losses on projects		374
Project related intangible assets, net		259
Project related intangible liabilities, net		109
Goodwill	[2]	4,990
Goodwill deductible for tax purposes				$ 1,700
Chicago Bridge & Iron Company N.V. [Member] | NCSA [Member]
Business Acquisition [Line Items]
Goodwill		2,700
Chicago Bridge & Iron Company N.V. [Member] | EARC [Member]
Business Acquisition [Line Items]
Goodwill		461
Chicago Bridge & Iron Company N.V. [Member] | MENA [Member]
Business Acquisition [Line Items]
Goodwill		50
Chicago Bridge & Iron Company N.V. [Member] | APAC [Member]
Business Acquisition [Line Items]
Goodwill		52
Chicago Bridge & Iron Company N.V. [Member] | Technology [Member]
Business Acquisition [Line Items]
Goodwill		$ 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] As of December 31, 2018, we had approximately $2.2 billion of cumulative impairment charges recorded in conjunction with our impairment assessment performed during the fourth quarter of 2018, as previously described in the 2018 Form 10-K.

[2] 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 $5 billion of goodwill recorded in conjunction with the Combination, $2.7 billion, $461 million, $50 million, $52 million and $1.7 billion was allocated to our NCSA, EARC, MENA, APAC and Technology reporting segments, respectively. Approximately $1.7 billion of the opening goodwill balance is deductible for tax purposes. See Note 9, Goodwill and Other Intangible Assets, for our discussion of impairment charges recorded during 2019 and our changes in estimates.