Long-Term Debt Long-Term Debt - WML Finance Revolving Credit Facility (Details) - Wynn Macau, Limited - WML Finance Credit Facility $ in Millions, $ in Millions	Dec. 31, 2018 USD ($)	Dec. 31, 2018 HKD ($)
Line of Credit Facility [Line Items]
Debt instrument, interest rate	1.50%	1.50%
Margin owed for cash collateral	0.40%	0.40%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Availability of credit facility	$ 495.2	$ 3,870