Debt - Additional Information (Detail)							3 Months Ended	9 Months Ended
	Nov. 01, 2019 USD ($)	Oct. 21, 2019 USD ($) Subsidiary	May 24, 2019 USD ($)	Oct. 30, 2018 USD ($)	May 10, 2018 USD ($)	Apr. 18, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	May 08, 2018 USD ($)
Debt Instrument [Line Items]
Senior secured long-term borrowing										$ 2,260,000,000
Letter of credit facility fee percentage								0.50%
Letter of credit outstanding fronting fee percentage							0.25%	0.25%
Debt instrument covenant minimum liquidity							$ 200,000,000	$ 200,000,000
Future maturities 2019							6,000,000	6,000,000
Future maturities 2020							$ 23,000,000	23,000,000
Amount received under credit facility								2,451,000,000
JRM Mexico [Member]
Debt Instrument [Line Items]
Receivables sold								65,000,000
Factoring costs trade receivables								$ 2,000,000
Percentage of receivables sold withheld and received								10.00%
Cash received from receivables, net of fees and amounts withheld								$ 57,000,000
Fiscal Quarters Ending December 31, 2019 through June 30, 2020 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								0.70%
Fiscal Quarters Ending September 30, 2020 and December 31, 2020 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								1.10%
Fiscal Quarters Ending March 31, 2021 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								1.20%
Maximum permitted leverage ratio							5.30%	5.30%
Fiscal Quarters Ending June 30, 2021 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								1.40%
Maximum permitted leverage ratio							4.80%	4.80%
Fiscal Quarters Ending September 30, 2021 and December 31, 2021 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								1.30%
Fiscal Quarter Ending after December 31, 2021 [Member]
Debt Instrument [Line Items]
Minimum fixed charge coverage ratio								1.50%
Maximum permitted leverage ratio							3.25%	3.25%
Fiscal Quarter Ending December 31, 2019 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							11.70%	11.70%
Fiscal Quarter Ending March 31, 2020 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							11.60%	11.60%
Fiscal Quarter Ending June 30, 2020 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							10.30%	10.30%
Fiscal Quarter Ending September 30, 2020 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							6.50%	6.50%
Fiscal Quarter Ending December 31, 2020 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							6.00%	6.00%
Fiscal Quarters Ending September 30, 2021 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							4.70%	4.70%
Fiscal Quarters Ending December 31, 2021 [Member]
Debt Instrument [Line Items]
Maximum permitted leverage ratio							4.80%	4.80%
Subsequent Event [Member]
Debt Instrument [Line Items]
Aggregate percentage of equity will receive by lenders upon funding		15.00%
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Debt Instrument [Line Items]
Interest rate derivatives										1,940,000,000
Financial Letters of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							4.25%	4.25%
Performance Stand By Letters Of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							2.125%	2.125%
Morgan Stanley Senior Funding Inc
Debt Instrument [Line Items]
Senior secured long-term borrowing			$ 50,000,000
Maximum [Member] | JRM Mexico [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								2.00%
Maximum [Member] | Interbank Equilibrium Interest Rate [Member] | Mexico [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								1.70%
Maximum [Member] | Financial Letters of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							4.25%	4.25%
Maximum [Member] | Performance Stand By Letters Of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							2.125%	2.125%
Minimum [Member] | JRM Mexico [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								1.40%
Minimum [Member] | Interbank Equilibrium Interest Rate [Member] | Mexico [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								1.40%
Minimum [Member] | Financial Letters of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							3.75%	3.75%
Minimum [Member] | Performance Stand By Letters Of Credit [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage							1.875%	1.875%
Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing							$ 1,440,000,000	$ 1,440,000,000
Available capacity under credit facility							5,000,000	$ 5,000,000
Facility expire month and year								2023-05
Letters of credit outstanding							1,435,000,000	$ 1,435,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing							1,000,000,000.0	1,000,000,000.0
Available capacity under credit facility							5,000,000	$ 5,000,000
Facility expire month and year								2023-05
Borrowing outstanding							801,000,000	$ 801,000,000
Maximum borrowing outstanding								801,000,000
Letters of credit outstanding							194,000,000	$ 194,000,000
Revolving Credit Facility [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								4.25%
Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								3.25%
Revolving Credit Facility [Member] | Maximum [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								4.25%
Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								3.25%
Revolving Credit Facility [Member] | Minimum [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								3.75%
Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin								2.75%
Financial Letters of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding							49,000,000	$ 49,000,000
Structured Equipment Financing [Member]
Debt Instrument [Line Items]
Available capacity under credit facility							$ 37,000,000	$ 37,000,000
Debt instrument maturity month and year								2020-01
Amount received under credit facility								$ 32,000,000
Term Facility [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Debt Instrument [Line Items]
Interest rate derivatives										$ 1,940,000,000
Term Facility [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin							5.00%
Term Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin							4.00%
Term Facility [Member] | Floor Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin							1.00%
Term Facility [Member]
Debt Instrument [Line Items]
Term facility, borrowings outstanding Amount							$ 2,200,000,000	2,200,000,000	$ 2,243,000,000
Second-lien Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount redeemed								$ 500,000,000
Debt instrument interest rate								8.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate						10.625%
Issue of second-lien seven-year senior secured notes						$ 1,300,000,000
Debt instrument maturity month and year						2024-05
Redemption price percentage						100.00%
Senior Notes [Member] | One or More Qualified Equity Offerings [Member]
Debt Instrument [Line Items]
Redemption price percentage						110.625%
Senior Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	10.625%
Minimum percentage of outstanding aggregate principal amount to be refinanced		95.00%
Scheduled interest payment due	$ 69,000,000
Minimum percentage of aggregate principle amount called up for immediate repayment upon default of scheduled interest payment	25.00%
Senior Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Redemption price percentage						35.00%
Credit Agreement [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing					$ 4,700,000,000
Credit Agreement [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage		5.00%
Credit Agreement [Member] | Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing					$ 1,440,000,000
Excess cash flow					75.00%
Credit Agreement [Member] | Term Facility Letters of Credit [Member]
Debt Instrument [Line Items]
Letter of credit facility fee percentage					3.00%
Credit Agreement [Member] | Term Facility Letters of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing							$ 320,000,000	$ 320,000,000
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing					$ 1,000,000,000.0
Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Financial Letters of Credit [Member]
Debt Instrument [Line Items]
Available credit facility for issuance					200,000,000
Credit Agreement [Member] | Term Facility [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing					$ 2,260,000,000
Term facility maturity period					7 years
Weighted average interest rate							7.70%	7.70%
Debt instrument periodic payment							$ 5,650,000
Credit Agreement [Member] | Term Facility [Member] | Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument issued							300,000,000	$ 300,000,000
Available capacity under credit facility							10,000,000	10,000,000
Credit Agreement [Member] | Term Facility [Member] | Financial Letters of Credit
Debt Instrument [Line Items]
Debt instrument issued							$ 45,000,000	45,000,000
Credit Agreement [Member] | Senior Secured Credit Facility [Member] | Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Deposited cash collateral account to secure reimbursement obligations					$ 319,300,000
Credit Agreement [Member] | Senior Secured Credit Facility [Member] | Term Facility Letters of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Senior secured long-term borrowing					$ 310,000,000.0
Debt Instrument Variable Rate Administrative Agent's Prime Rate [Member] | Term Facility [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin							1.00%
Debt Instrument Variable Rate Administrative Agent's Prime Rate [Member] | Term Facility [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Base rate and applicable margin							0.50%
Superpriority Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument maximum cost adjustments amount							$ 260,000,000
Superpriority Credit Agreement [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Available capacity under credit facility		$ 1,700,000,000
Number of subsidiaries | Subsidiary		3
Line of credit facility, expiration date		Oct. 21, 2021
Percentage of delivered approved budget less than projected amount		15.00%
Percentage of delivered approved budget exceeds projected amount		15.00%
Percentage of delivered approved budget exceeds projected amount for first week		20.00%
Percentage of delivered approved budget exceeds projected amount for three-week period		15.00%
Debt instrument covenant one liquidity		$ 100,000,000
Debt instrument covenant three minimum liquidity		75,000,000
Superpriority Credit Agreement [Member] | Tranche A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		650,000,000
Superpriority Credit Agreement [Member] | Tranche B [Member] | Subsequent Event [Member] | Available to Borrowers between November 30, 2019 and December 31, 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		350,000,000
Superpriority Credit Agreement [Member] | Tranche C [Member] | Subsequent Event [Member] | Available to Borrowers between December 30, 2019 and March 31, 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		150,000,000
Superpriority Credit Agreement [Member] | Tranche D [Member] | Subsequent Event [Member] | Available to Borrowers between January 31, 2020 and March 31, 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		550,000,000
Superpriority Credit Agreement [Member] | Maximum [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument covenant minimum liquidity		$ 75,000,000
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Letter of credit facility fee percentage		1.50%
Excess cash flow		75.00%
Available capacity under credit facility		$ 400,000,000
Letter of credit outstanding fronting fee percentage		0.50%
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Subsequent Event [Member] | First Six Months After the Closing but Prior to End of First 18 Months [Member]
Debt Instrument [Line Items]
Percentage of principal amount of term loan to be repaid		3.00%
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Eurodollar Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Base rate and applicable margin		10.00%
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Base Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Base rate and applicable margin		9.00%
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Tranche A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		$ 100,000,000
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Tranche B [Member] | Subsequent Event [Member] | Available to Borrowers between November 30, 2019 and December 31, 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		100,000,000
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Tranche D [Member] | Subsequent Event [Member] | Available to Borrowers between January 31, 2020 and March 31, 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		$ 200,000,000
Superpriority Credit Agreement [Member] | New LC Facility [Member] | Maximum [Member] | Subsequent Event [Member] | First Six Months After Closing [Member]
Debt Instrument [Line Items]
Percentage of principal amount of term loan to be repaid		3.00%
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Available capacity under credit facility		$ 1,300,000,000
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Eurodollar Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Base rate and applicable margin		10.00%
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Base Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Base rate and applicable margin		9.00%
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Tranche A [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		$ 550,000,000
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Tranche B [Member] | Subsequent Event [Member] | Available to Borrowers between November 30, 2019 and December 31, 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		250,000,000
Superpriority Credit Agreement [Member] | New Term Facility [Member] | Tranche D [Member] | Subsequent Event [Member] | Available to Borrowers between January 31, 2020 and March 31, 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility available for capital		$ 350,000,000
10.625% Senior Notes [Member]
Debt Instrument [Line Items]
Term facility, borrowings outstanding Amount									1,300,000,000
10.625% Senior Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Minimum percentage of outstanding aggregate principal amount to be refinanced		95.00%
Letter of Credit Agreement [Member] | Letter of Credit Facility [Member]
Debt Instrument [Line Items]
Available credit facility for issuance							10,000,000	10,000,000
Debt instrument issued							220,000,000	220,000,000
Available capacity under credit facility				$ 230,000,000
Facility expire month and year				2021-12
Letter of Credit Agreement Amendment [Member] | Letter of Credit Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Letter of credit participation fee percentage		5.00%
North Ocean Construction Financing [Member]
Debt Instrument [Line Items]
Term facility, borrowings outstanding Amount									$ 16,000,000
North Ocean Construction Financing [Member] | Secured Debt [Member] | North Ocean 105 [Member]
Debt Instrument [Line Items]
Term facility, borrowings outstanding Amount							12,000,000	12,000,000
Future maturities 2019							4,000,000	4,000,000
Future maturities 2020							$ 8,000,000	$ 8,000,000