Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)			3 Months Ended		12 Months Ended
	May 10, 2018	May 08, 2018 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of new common equity interests			6.00%		6.00%
Selling, general and administrative expenses					$ 284,000,000	$ 282,000,000	$ 204,000,000
Income (loss) from investments in unconsolidated affiliates						(3,000,000)	(2,000,000)
Reverse stock split	three-to-one
Reverse stock split, conversion ratio	3
Gain (loss) on asset disposals			$ 2,000,000	$ 102,000,000	$ (104,000,000)	(3,000,000)	2,000,000
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.
Operating lease right-of-use assets			364,000,000		$ 364,000,000
Lease obligations			145,000,000		145,000,000	8,000,000
Long-term lease obligations			304,000,000		$ 304,000,000	66,000,000
ASU 2016-02 [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Operating lease right-of-use assets								$ 424,000,000
Lease obligations								101,000,000
Long-term lease obligations								$ 342,000,000
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
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
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)
Other Operating Expense [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Gain (loss) on asset disposals						$ (3,000,000)	$ 2,000,000
Interest Expense [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Unrealized losses recognized		$ 67,000,000
Letter of Credit Facility [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Available capacity under credit facility			188,000,000		$ 188,000,000
Letters of credit outstanding			1,252,000,000		1,252,000,000
DIP Credit Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Available capacity under credit facility			2,810,000,000		2,810,000,000
DIP Credit Agreement [Member] | Letter of Credit Facility [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Letters of credit outstanding			743,000,000		743,000,000
DIP Credit Agreement [Member] | Letter of Credit Facility [Member] | Tranche A [Member] | Available at Closing [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Letters of credit outstanding			300,000,000		300,000,000
DIP Credit Agreement [Member] | Letter of Credit Facility [Member] | Tranche B [Member] | Available upon Entry of Final DIP Order [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Letters of credit outstanding			243,000,000		243,000,000
DIP Credit Agreement [Member] | Letter of Credit Facility [Member] | Tranche C [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Letters of credit outstanding			200,000,000		200,000,000
DIP Credit Agreement [Member] | Term Loan Facility [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Available capacity under credit facility			2,067,000,000		2,067,000,000
DIP Credit Agreement [Member] | Term Loan Facility [Member] | Tranche A [Member] | Available at Closing [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Line of credit facility available for capital			550,000,000		550,000,000
DIP Credit Agreement [Member] | Term Loan Facility [Member] | Tranche B [Member] | Available upon Entry of Final DIP Order [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Line of credit facility available for capital			650,000,000		650,000,000
DIP Credit Agreement [Member] | Term Loan Facility [Member] | Tranche C [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Line of credit facility available for capital			823,000,000		823,000,000
DIP Credit Agreement [Member] | Term Loan Facility [Member] | Tranche D [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Line of credit facility available for capital			$ 44,000,000		44,000,000
Share and asset purchase agreement [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Amount paid to acquire bid					$ 2,725,000,000
Break up fee percentage equal to purchase price					3.00%