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Long-Term Debt - Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Debt Disclosure [Abstract] |  |
Fair value of debt instrument excluding the Redemption Note | $ 11,490 | $ 11,230
Long-term debt excluding the Redemption Note | $ 11,830 | $ 12,160

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- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt Instrument, Fair Value, Excluding The Redemption Note + References No definition available. + Details
Name: | wynn_DebtInstrumentFairValueExcludingTheRedemptionNote
Namespace Prefix: | wynn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Long Term Debt Excluding Redemption Note + References No definition available. + Details
Name: | wynn_LongTermDebtExcludingRedemptionNote
Namespace Prefix: | wynn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant