Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018 ft² tower Facility Restaurant Outlet Room showroom
Wynn Macau
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of hotel | tower	2
Number of rooms in hotel | Room	1,008
Functional Area Square Footage	31,000
Number of restaurants | Restaurant	11
Wynn Macau | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	273,000
Wynn Macau | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	59,000
Wynn Las Vegas
Organization Consolidation And Presentation Of Financial Statements Disclosure
Noncontrolling Interest, Ownership Percentage by Parent	100.00%
Number of hotel | tower	2
Number of rooms in hotel | Room	4,748
Wynn Las Vegas | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	192,000
Wynn Las Vegas | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	160,000
Wynn Las Vegas | Food and Beverage
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of outlets | Outlet	33
Wynn Las Vegas | Meeting and Convention Space
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	290,000
Functional area square footage under construction	430,000
Wynn Las Vegas | Showrooms
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of showrooms | showroom	2
Wynn Las Vegas | Nightclubs and Beachclubs
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of facilities | Facility	3
Wynn Palace
Organization Consolidation And Presentation Of Financial Statements Disclosure
Number of rooms in hotel | Room	1,706
Number of restaurants | Restaurant	13
Wynn Palace | Casino
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	424,000
Wynn Palace | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	106,000
Wynn Palace | Meeting and Convention Space
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	37,000
Retail Joint Venture
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional Area Square Footage	88,000
Ownership Percentage	50.10%
Functional area square footage under construction	74,000