Long-Term Debt - 2029 Notes (Details) - WRF 5 1/8% Senior Notes, due 2029 - Senior Notes - WRF	Sep. 20, 2019
Debt Instrument [Line Items]
Debt redemption price as percentage of principal	100.00%
Percentage of principal repayment on the event of change of control	101.00%
Event of default, option to accelerate amounts due, minimum percentage of aggregate principal amount of debt held	25.00%

Debt Instrument, Debt Default, Option to Accelerate Amounts Due, Minimum Percentage of Aggregate Principal Amount of Debt Held

No definition available.

Name:	wynn_DebtInstrumentDebtDefaultOptionToAccelerateAmountsDueMinimumPercentageOfAggregatePrincipalAmountOfDebtHeld
Namespace Prefix:	wynn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant