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Long-Term Debt - Summary of Long-Term Debt - Additional Information (Detail) - USD ($)			1 Months Ended	12 Months Ended
	Sep. 20, 2019	Jul. 25, 2018	Feb. 26, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt, gross				$ 13,154,049,000	$ 10,515,272,000
Letter of credit outstanding				16,100,000
Wynn Macau | Wynn Macau Term Loan, due 2022 | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,268,106,000	$ 2,302,540,000
Interest rate during period on debt				2.41%	3.95%
Wynn Macau | Senior Revolving Credit Facility, due 2022 | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross				$ 407,443,000	$ 350,232,000
Interest rate during period on debt				2.44%	3.92%
Availability of credit facility				$ 343,500,000
WRF | WRF Senior Secured Credit Facilities
Debt Instrument [Line Items]
Interest rate during period on debt				1.90%	3.55%
WRF | WRF Revolver, due 2024 | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross				$ 716,000,000	$ 0
Availability of credit facility				117,900,000
Letter of credit outstanding				16,100,000
WRF | WRF Revolver, due 2024 | Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Repayment of outstanding borrowings			$ 716,000,000.0
Wynn/CA Plaza Property Owner, LLC And Wynn/CA Property Owner, LLC (The Borrowers) | Retail Term Loan, due 2025 | Term Loan
Debt Instrument [Line Items]
Long-term debt, gross		$ 615,000,000.0		$ 615,000,000	$ 615,000,000
Interest rate during period on debt				2.70%	3.41%
LIBOR | Wynn Macau | Wynn Macau Credit Facilities [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%
LIBOR | Wynn Macau | Wynn Macau Term Loan, due 2022 | Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Long-term debt, gross				$ 717,300,000
LIBOR | Wynn Macau | Senior Revolving Credit Facility, due 2022 | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Long-term debt, gross				$ 231,700,000
LIBOR | WRF | WRF Senior Secured Credit Facilities
Debt Instrument [Line Items]
Basis spread on variable rate				1.75%
LIBOR | WRF | WRF Revolver, due 2024 | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
LIBOR | Wynn/CA Plaza Property Owner, LLC And Wynn/CA Property Owner, LLC (The Borrowers) | Retail Term Loan, due 2025 | Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		1.70%		1.70%
HIBOR | Wynn Macau | Wynn Macau Credit Facilities [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
HIBOR | Wynn Macau | Wynn Macau Term Loan, due 2022 | Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Long-term debt, gross				$ 550,800,000
HIBOR | Wynn Macau | Senior Revolving Credit Facility, due 2022 | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Long-term debt, gross				$ 175,700,000

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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