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Long-Term Debt - Additional Information (Detail)			6 Months Ended
	Jun. 19, 2020 USD ($)	Apr. 14, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Apr. 10, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Payment of related fees and expenses			$ 13,196,000	$ 10,488,000
Fair value, excluding the redemption note			12,030,000,000.00			$ 10,800,000,000
Long-term debt excluding the Redemption Note			$ 12,890,000,000			$ 10,520,000,000
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 750,000,000.0
Stated interest rate	5.50%		5.50%
Payment default classification period for interest payment	30 days
Event of default, failure to pay unfavorable judgements, maximum allowable amount	$ 50,000,000
Payment of related fees and expenses	7,100,000
Debt issuance costs	$ 7,100,000
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Redemption Period One
Debt Instrument [Line Items]
Redemption percentage, redeemable from cash proceeds from equity offerings	35.00%
Debt redemption price as percentage of principal, redeemable from cash proceeds from equity offerings	105.50%
Debt redemption price as percentage of principal	100.00%
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Redemption Period Two | Maximum
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	104.125%
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Redemption Period Two | Minimum
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	100.00%
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Change of Control
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	101.00%
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Change in or Amendment to Tax Laws or Tax Positions
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	100.00%
WML | WML 5 1/2% Senior Notes, due 2026 | Senior Notes | Material Adverse Effect
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	100.00%
Minimum number of consecutive days	10 days
WRF | WRF Credit Facilities | Credit Agreement | During Financial Covenant Relief Period
Debt Instrument [Line Items]
Minimum liquidity required to be maintained at all times during Financial Covenant Relief Period					$ 300,000,000.0
WRF | WRF Credit Facilities | Credit Agreement | First Fiscal Quarter of the Financial Covenant Increase Period
Debt Instrument [Line Items]
Maximum consolidated first lien net leverage ratio					4.50
WRF | WRF Credit Facilities | Credit Agreement | Second Fiscal Quarter of the Financial Covenant Increase Period
Debt Instrument [Line Items]
Maximum consolidated first lien net leverage ratio					4.25
WRF | WRF Credit Facilities | Credit Agreement | Third Fiscal Quarter of the Financial Covenant Increase Period
Debt Instrument [Line Items]
Maximum consolidated first lien net leverage ratio					4.00
WRF | WRF Credit Facilities | Credit Agreement | Each Subsequent Fiscal Quarter Thereafter of the Financial Covenant Increase Period
Debt Instrument [Line Items]
Maximum consolidated first lien net leverage ratio					3.75
WRF | WRF 5 1/8% Senior Notes, due 2029 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate			5.125%
WRF | WRF 7 3/4% Senior Notes, due 2025 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 600,000,000.0
Stated interest rate		7.75%	7.75%
Payment of related fees and expenses		$ 5,600,000
Debt issuance costs		$ 5,200,000
Event of default, option to accelerate amounts due, minimum percentage of aggregate principal amount of debt held		25.00%
WRF | WRF 7 3/4% Senior Notes, due 2025 | Senior Notes | Redemption Period One
Debt Instrument [Line Items]
Redemption percentage, redeemable from cash proceeds from equity offerings		35.00%
Debt redemption price as percentage of principal, redeemable from cash proceeds from equity offerings		107.75%
Debt redemption price as percentage of principal		100.00%
WRF | WRF 7 3/4% Senior Notes, due 2025 | Senior Notes | Redemption Period Two
Debt Instrument [Line Items]
Debt redemption price as percentage of principal		101.00%

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