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Stockholders' Equity and Equity-Based Incentive Plans - Additional Information (Detail)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
May 10, 2018
shares
May 09, 2018
$ / shares
shares
Sep. 30, 2018
USD ($)
$ / shares
Jun. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
Dec. 31, 2017
$ / shares
Accumulated Other Comprehensive Income Loss [Line Items]                
Reverse stock split   three-to-one            
Reverse stock split, conversion ratio   3            
Reverse stock split, common stock par value | $ / shares   $ 1.00 $ 1.00     $ 1.00   $ 1.00
Business combination, number of McDermott's shares entitled for each share of CB&I owned           85.0    
Selling, General and Administrative Costs [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-based compensation expense | $     $ 9   $ 8 $ 24 $ 20  
Chicago Bridge & Iron Company N.V. [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Business combination, number of McDermott's shares entitled for each share of CB&I owned 84.5 84.5            
Chicago Bridge & Iron Company N.V. [Member] | Restructuring Costs [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-based compensation expense | $       $ 26        
Chicago Bridge & Iron Company N.V. [Member] | Restricted Stock Units [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-settled equity-based awards, restricted stock units, unvested   2.1            
Chicago Bridge & Iron Company N.V. [Member] | Restricted Stock Units [Member] | Minimum [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-settled equity-based awards, restricted stock units, vesting period   3 years            
Chicago Bridge & Iron Company N.V. [Member] | Restricted Stock Units [Member] | Maximum [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-settled equity-based awards, restricted stock units, vesting period   4 years            
Chicago Bridge & Iron Company N.V. [Member] | Stock Options [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Stock-settled equity-based awards, stock options, unvested   0.1            
Effect of Reverse Stock Split [Member]                
Accumulated Other Comprehensive Income Loss [Line Items]                
Reverse stock split           three-to-one    
Reverse stock split, conversion ratio   3            
Reverse stock split, common stock par value | $ / shares   $ 1.00