Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019 ft² room tower showroom facility restaurant	Feb. 28, 2020 ft²	Nov. 30, 2017 ft²
Encore Boston Harbor
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of rooms in hotel | room	671
Number of restaurants | restaurant	16
Encore Boston Harbor | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	210,000
Encore Boston Harbor | Meeting and Convention
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	71,000
Encore Boston Harbor | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	8,000
Wynn Palace | Macau Operations
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of rooms in hotel | room	1,706
Number of restaurants | restaurant	14
Wynn Palace | Macau Operations | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	424,000
Wynn Palace | Macau Operations | Meeting and Convention
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	37,000
Wynn Palace | Macau Operations | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	106,000
Wynn Macau | Macau Operations
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of rooms in hotel | room	1,010
Number of hotel towers | tower	2
Number of restaurants | restaurant	12
Wynn Macau | Macau Operations | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	252,000
Wynn Macau | Macau Operations | Meeting and Convention
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	31,000
Wynn Macau | Macau Operations | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	59,000
Wynn Las Vegas | Las Vegas Operations
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of rooms in hotel | room	4,748
Number of hotel towers | tower	2
Number of restaurants | restaurant	33
Number of theaters | showroom	2
Number of nightclubs | facility	3
Wynn Las Vegas | Las Vegas Operations | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	192,000
Wynn Las Vegas | Las Vegas Operations | Meeting and Convention
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	507,000
Wynn Las Vegas | Las Vegas Operations | Meeting and Convention | Subsequent Event
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage		217,000
Wynn Las Vegas | Las Vegas Operations | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	160,000
Retail Joint Venture | Las Vegas Operations | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage	88,000
Functional area square footage under construction	74,000
Wynn Palace and Wynn Macau
Organization Consolidation And Presentation Of Financial Statements Disclosure
Percentage of ownership	72.00%
Wynn Palace and Wynn Macau | Wynn Asia
Organization Consolidation And Presentation Of Financial Statements Disclosure
Percentage of ownership	72.00%
Wynn Las Vegas
Organization Consolidation And Presentation Of Financial Statements Disclosure
Percentage of ownership	100.00%
Retail Joint Venture
Organization Consolidation And Presentation Of Financial Statements Disclosure
Percentage of ownership	50.10%
Functional area square footage under construction			74,000
Retail Joint Venture | Wynn Las Vegas | Las Vegas Operations
Organization Consolidation And Presentation Of Financial Statements Disclosure
Percentage of ownership	50.10%