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Organization - Additional Information (Detail) $ in Thousands			1 Months Ended	12 Months Ended
	Feb. 11, 2021 USD ($)	Apr. 03, 2018 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2020 USD ($) ft² restaurant room tower showroom facility	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Oct. 24, 2020	Nov. 30, 2017 ft²
Organization Consolidation And Presentation Of Financial Statements Disclosure
Cash and cash equivalents | $				$ 3,482,032	$ 2,351,904
Amount raised in equity offering | $				$ 0	$ 0	$ 915,240
Equity Offering
Organization Consolidation And Presentation Of Financial Statements Disclosure
Amount raised in equity offering | $		$ 915,200
Subsequent Event | Equity Offering
Organization Consolidation And Presentation Of Financial Statements Disclosure
Amount raised in equity offering | $	$ 842,400		$ 842,500
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				208,000
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				107,000
Wynn Macau | Wynn Macau Revolver, due 2022 | Revolving Credit Facility
Organization Consolidation And Presentation Of Financial Statements Disclosure
Availability of credit facility | $				$ 343,500
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				31
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				194,000
Wynn Las Vegas | Las Vegas Operations | Meeting and Convention
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage				513,000
Wynn Las Vegas | Las Vegas Operations | Retail
Organization Consolidation And Presentation Of Financial Statements Disclosure
Functional area square footage				152,000
WRF | WRF Revolver, due 2024 | Revolving Credit Facility
Organization Consolidation And Presentation Of Financial Statements Disclosure
Availability of credit facility | $				$ 117,900
Wynn Palace and Wynn Macau
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%
Wynn Interactive
Organization Consolidation And Presentation Of Financial Statements Disclosure
Economic interest held following merger				72.00%			100.00%

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