Commitments and Contingencies - Additional Information (Detail)				12 Months Ended
	Oct. 21, 2019 Plaintiff	Oct. 18, 2019 Plaintiff	Mar. 08, 2016 USD ($)	Dec. 31, 2019 USD ($) Plaintiff
Commitments And Contingencies Disclosure [Line Items]
Loss contingency estimate				$ 171,000,000
Potential environmental liabilities				0
Reduction in Transaction Price [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency estimate				24,000,000
Cost Reimbursable Projects [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency, damages amount			$ 4,500,000,000
Asserted claims against customer			$ 250,000,000
Consolidated Joint Venture Projects [Member]
Commitments And Contingencies Disclosure [Line Items]
Asserted claims against customer				103,000,000
Net of amounts owned to joint venture				78,600,000
Reserve for estimated project losses				55,000,000
Reserve for estimated project losses at joint venture level				$ 85,000,000
Mercury Litigation [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of plaintiffs | Plaintiff		54		54
Number of plaintiffs set for the trials of the claims | Plaintiff	4
Chicago Bridge & Iron Company N.V. Securities Litigation [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual liability amount				$ 0
Gotham Diversified Neutral Master Fund, LP, et al. v. Chicago Bridge & Iron Company N.V. et al., and Appaloosa Investment L.P., et al., v. Chicago Bridge & Iron Company N.V., et al. [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual liability amount				0
Daniel Cohen, et al. v. Chicago Bridge & Iron Company, N.V., et al. [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual liability amount				0
Edwards v. McDermott International, Inc., et al.. [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual liability amount				0
Saudi Arabia Customs Audit [Member]
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual liability amount				0
Loss contingency estimate				$ 64,700,000