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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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