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Income Taxes - Additional Information (Detail) $ / shares in Units, MOP$ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2020 | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) $ / shares | Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2020 MOP (MOP$)
Income Taxes |  |  |  |  |
Tax exemption period |  | 5 years |  |  |
Complementary tax rate | 12.00% | 12.00% |  |  |
Amount of complementary tax exemption |  |  | $ 77,700,000 | $ 96,800,000 |
Amount of complementary tax exemption per share | $ / shares |  |  | $ 0.73 | $ 0.90 |
Annual complementary tax to be paid |  | $ 1,600,000 | $ 1,600,000 | $ 1,600,000 | MOP$ 12.8
Recognized foreign tax credit tax benefit net of valuation allowance |  |  | 32,900,000 | 82,800,000 |
Increase (decrease) in valuation allowance for deferred tax assets |  | (227,300,000) | 115,500,000 |  |
Tax benefits (loss) realized |  | 1,200,000 | 5,700,000 | 2,000,000.0 |
FTC carryforwards expired |  | 530,400,000 |  |  |
Foreign tax credit carryforwards |  | 2,500,000,000 |  |  |
Disallowed interest carryforwards not subject to expiration |  | 604,200,000 |  |  |
Valuation allowance |  | 2,986,684,000 | 2,759,431,000 |  |
U.S. and foreign uncertain tax positions that increase NOL and foreign tax credit carryforward deferred tax assets |  | 107,700,000 | 104,300,000 | 99,500,000 |
Uncertain tax positions, noncurrent |  | 0 | 0 | 0 |
Unrecognized tax benefits that would impact the effective tax rate if recognized |  | 40,200,000 | 36,600,000 | 31,000,000.0 |
Recognized interest and penalties |  | 0 | 0 | 0 |
Decrease in unrecognized tax benefits due to expiration of the statute of limitations |  | 3,695,000 | 4,161,000 | 4,692,000 |
Maximum |  |  |  |  |
Income Taxes |  |  |  |  |
Unrecognized tax benefit increase resulting in tax settlements |  | 1,400,000 |  |  |
Tax Credit Carryforward Expiry In 2021 |  |  |  |  |
Income Taxes |  |  |  |  |
Foreign tax credit carryforwards |  | 540,300,000 |  |  |
Tax Credit Carryforward Expiry In 2023 |  |  |  |  |
Income Taxes |  |  |  |  |
Foreign tax credit carryforwards |  | 756,000,000.0 |  |  |
Tax Credit Carryforward Expiry In 2024 |  |  |  |  |
Income Taxes |  |  |  |  |
Foreign tax credit carryforwards |  | 710,700,000 |  |  |
Tax Credit Carryforward, Expires at 2025 |  |  |  |  |
Income Taxes |  |  |  |  |
Foreign tax credit carryforwards |  | 47,200,000 |  |  |
Tax Credit Carryforward, Expires at 2027 |  |  |  |  |
Income Taxes |  |  |  |  |
Foreign tax credit carryforwards |  | 486,200,000 |  |  |
Wynn Macau |  |  |  |  |
Income Taxes |  |  |  |  |
Decrease in unrecognized tax benefits due to expiration of the statute of limitations |  | $ 3,700,000 | 4,200,000 | 4,700,000 |
U.S. |  |  |  |  |
Income Taxes |  |  |  |  |
Tax credit of "net" foreign source income |  | 21.00% |  |  |
Foreign tax credit carryforwards |  | $ 2,540,400,000 | 3,070,914,000 |  |
Tax loss carryforward |  | 197,200,000 |  |  |
Valuation allowance |  | $ 2,812,808,000 | 2,604,497,000 |  |
Foreign |  |  |  |  |
Income Taxes |  |  |  |  |
Gaming tax |  | 35.00% |  |  |
Tax loss carryforward |  | $ 378,600,000 | 376,800,000 | $ 340,000,000.0 |
Valuation allowance |  | 173,876,000 | $ 154,934,000 |  |
State |  |  |  |  |
Income Taxes |  |  |  |  |
Tax loss carryforward |  | $ 51,600,000 |  |  |

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