Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)		3 Months Ended		12 Months Ended
	May 10, 2018	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 08, 2018 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Cost of operations				$ 6,187,000,000	$ 2,449,000,000	$ 2,249,000,000
Selling, general and administrative expenses				282,000,000	204,000,000	183,000,000
Income (loss) from investments in unconsolidated affiliates				$ (3,000,000)	(2,000,000)	(4,000,000)
Reverse stock split	three-to-one
Reverse stock split, conversion ratio	3
Senior secured long-term borrowing							$ 2,260,000,000
Redeemable preferred stock, redemption description				We may redeem the Redeemable Preferred Stock at any time, and the Redeemable Preferred Stock is contingently redeemable at the option of the holders after seven years or upon a change of control.
ASU 2016-16 [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Provision for income tax benefit at statutory income tax rate		$ 111,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Interest rate derivatives							$ 1,940,000,000
Marine Assets [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				25 years
Minimum percentage of equivalent straight-line depreciation for low utilization period				25.00%
Other Capitalized Property Plant And Equipment [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				5 years
Minimum [Member] | Building [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				3 years
Minimum [Member] | Machinery and Equipment [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				3 years
Maximum [Member] | Building [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				46 years
Maximum [Member] | Machinery and Equipment [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Property, plant and equipment economic useful lives				28 years
Post-Combination Bid and Proposal Costs [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Cost of operations				$ 76,000,000
Pre-Combination Bid and Proposal Costs [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Selling, general and administrative expenses			$ 10,000,000		37,000,000	22,000,000
Operating Income [Member] | Oil and Gas and Qingdao McDermott Wuchuan Offshore Engineering Company Ltd [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Income (loss) from investments in unconsolidated affiliates					$ (12,000,000)	$ 200,000