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Income Taxes - Expected Expirations of Federal and State Losses and Credits (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2018
--- | --- | ---
Federal |  |
Expirations of Operating Loss Carryforwards, Components [Abstract] |  |
2025 | $ 16.0 |
2026 | 17.1 |
2027 | 6.1 |
2028 and thereafter | 245.9 |
Indefinite | 801.9 |
Total | 1,087.0 | $ 801.9
State |  |
Expirations of Operating Loss Carryforwards, Components [Abstract] |  |
2025 | 5.2 |
2026 | 7.1 |
2027 | 1.9 |
2028 and thereafter | 333.6 |
Indefinite | 0.7 |
Total | 348.5 |
Foreign Tax Jurisdiction |  |
Expirations of Operating Loss Carryforwards, Components [Abstract] |  |
2025 | 0.0 |
2026 | 0.0 |
2027 | 0.0 |
2028 and thereafter | 1.0 |
Indefinite | 0.0 |
Total | 1.0 |
Research Tax Credit Carryforward | Federal |  |
Expirations of Tax Credit Carryforwards [Abstract] |  |
2025 | 0.0 |
2026 | 0.0 |
2027 | 0.0 |
2028 and thereafter | 46.1 |
Indefinite | 0.0 |
Total | 46.1 |
Research Tax Credit Carryforward | State |  |
Expirations of Tax Credit Carryforwards [Abstract] |  |
2025 | 0.0 |
2026 | 0.0 |
2027 | 0.0 |
2028 and thereafter | 0.0 |
Indefinite | 7.9 |
Total | $ 7.9 |

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