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

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Period Type:	instant

- Definition

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

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Debt Instrument, Amount Paid to Execute Indenture

+ References

No definition available.

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- Definition

Debt Instrument Cut Off Date For Specified Redemption Price

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- Definition

Payment Default Classification Period For Interest Payment

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- Definition

Percentage Of Principal Repayment On Event Of Change Of Control

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Long-Term Debt - 4 1/4% Senior Notes due 2023 (Details) - WLV - WLV 4 1/4% Senior Notes, due 2023 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 20, 2018	May 22, 2013
First Mortgage Notes
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount			$ 500
Debt instrument, interest rate			4.25%
Debt Instrument, Maturity Date	May 30, 2023
Debt redemption date	Feb. 28, 2023
Debt redemption price as percentage of principal	100.00%
Percentage of principal repayment on the event of change of control	101.00%
Payment default classification period for interest payment	30 days
Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	4.25%
Amount paid to execute indenture		$ 25
Debt issuance costs		$ 25