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v3.24.0.1

Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2018
Increase (decrease) in deferred tax asset valuation allowance | $ (11.7) | $ (7.7) |  |  |  |
Operating Loss Carryforwards |  |  |  |  |  | $ 568.0
Operating Loss Carryforwards, No Expiration | 131.4 |  | $ 131.4 |  |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount |  |  | 31.7 | $ 0.6 | $ 71.3 |
Provision (benefit) for income taxes |  |  | (0.1) | (15.6) | 39.1 |
Liability for Uncertain Tax Positions, Noncurrent | 2.9 |  | 2.9 | 1.9 | $ 1.0 |
Income Tax Examination, Penalties and Interest Expense Reduction |  |  | (0.2) | (0.1) |  |
Unrecognized Tax Benefits, Income Tax Penalties Expense Reduction |  |  | (1.0) | (0.9) |  |
Income Tax Examination, Penalties and Interest Accrued | 0.3 |  | $ 0.3 | $ 0.1 |  |
Federal Statutory Income Tax Rate, Percent |  |  | 21.00% | 21.00% | 21.00% |
Deferred Tax Assets, Valuation Allowance | 382.4 |  | $ 382.4 | $ 414.1 |  |
Domestic Tax Authority [Member] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount |  |  | $ 19.4 |  |  |
State and Local Jurisdiction [Member] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent |  |  | 15.00% | 2.00% | 1.00% |
Operating Loss Carryforwards, Valuation Allowance | $ 488.4 |  | $ 488.4 |  |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount |  |  | $ 12.3 | $ 12.1 | $ 40.7 |

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