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Income Taxes (Additional Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Oct. 21, 2024
Tax Credit Carryforward [Line Items] |  |  |  |  |
Income tax examination estimate of assessed amount before interest and penalties |  |  |  |  | $ 96.8
CNK [Member] |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Income tax expense (benefit) | $ 42.7 | $ (21.4) | $ 71.3 | $ (29.8) |
Effective income tax rate |  |  | (37.60%) |  |
Deferred tax benefit | 70.5 |  | $ 116.3 |  |
Remaining valuation allowance | 134.3 |  | 134.3 |  |
CUSA [Member] |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Income tax expense (benefit) | 39.7 | $ (17.4) | $ 67.6 | $ (24.2) |
Effective income tax rate |  |  | (33.70%) |  |
Deferred tax benefit | 66.7 |  | $ 112.4 |  |
Remaining valuation allowance | $ 87.4 |  | $ 87.4 |  |

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