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Long-Term Debt - Additional Information (Detail) - USD ($)		3 Months Ended
	Mar. 04, 2021	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Net proceeds of sale of senior notes		$ 1,257,500,000	$ 0
Repayments of long-term debt		1,260,000,000
Premiums paid over face value		97,900,000
Payment of accrued interest		12,500,000
Cost related to the tender offer		1,100,000
Loss on early retirement of debt		238,539,000	$ 0
6.75% Senior Notes due 2029:
Debt Instrument [Line Items]
Principal		$ 1,250,000,000
Principal amount of senior notes issued	$ 1,250,000,000
Interest rate on debt instrument	6.75%	6.75%
Net proceeds of sale of senior notes	$ 1,240,000,000
7.5% Senior Notes due 2025
Debt Instrument [Line Items]
Principal		$ 244,400,000
Interest rate on debt instrument	7.50%	7.50%
Repayments of long-term debt		$ 375,000,000.0
9.75% Senior Notes due 2026
Debt Instrument [Line Items]
Principal		$ 872,934,000
Interest rate on debt instrument	9.75%	9.75%
Repayments of long-term debt		$ 777,100,000
Bank Credit Facility
Debt Instrument [Line Items]
Principal		550,000,000
Bank credit facility		$ 1,400,000,000
Leverage ratio		400.00%
Current ratio		100.00%
Bank Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee on unused borrowing base		0.375%
Bank Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee on unused borrowing base		0.50%
Bank Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Spread rate for interest rate on credit facility		2.25%
Bank Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Spread rate for interest rate on credit facility		3.25%
Bank Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Spread rate for interest rate on credit facility		1.25%
Bank Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Spread rate for interest rate on credit facility		2.25%

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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