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Long-Term Debt - WLV Senior Notes (Details) - Senior Notes - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	May 11, 2017	Feb. 18, 2015	May 22, 2013
WRF Senior Secured Credit Facilities | Subsidiary Issuer
Debt Instrument [Line Items]
Debt covenant, percentage of total assets	15.00%
WLV
Debt Instrument [Line Items]
Payment default classification period for interest payment	30 days
WLV | WLV 4 1/4% Senior Notes, due 2023
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount					$ 500,000,000.0
Debt instrument, interest rate	4.25%				4.25%
WLV | WLV 5 1/2% Senior Notes, due 2025
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount				$ 1,800,000,000
Debt instrument, interest rate	5.50%			5.50%
Principal amount purchased		$ 20,000,000.0
WLV | WLV 5 1/4% Senior Notes, due 2027
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount			$ 900,000,000.0
Debt instrument, interest rate	5.25%		5.25%

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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