Long-Term Debt Long-Term Debt - 4 1/4% Senior Notes due 2023 (Details) - Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp - 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	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