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Income Taxes Expected Expirations of Federal and State Losses and Credits (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Federal |
Expirations of Operating Loss Carryforwards, Components [Abstract] |
2021 | $ 2.3
2022 | 6.1
2023 | 5.3
2024 | 14.5
2025 and thereafter | 267.7
Indefinite | 270.3
Total | 566.2
State |
Expirations of Operating Loss Carryforwards, Components [Abstract] |
2021 | 0.3
2022 | 0.4
2023 | 1.2
2024 | 9.1
2025 and thereafter | 132.9
Indefinite | 0.0
Total | 143.9
Research Tax Credit Carryforward | Federal |
Expirations of Tax Credit Carryforwards [Abstract] |
2021 | 0.0
2022 | 0.0
2023 | 0.0
2024 | 0.0
2025 and thereafter | 19.8
Indefinite | 0.0
Total | 19.8
Research Tax Credit Carryforward | State |
Expirations of Tax Credit Carryforwards [Abstract] |
2021 | 0.0
2022 | 0.0
2023 | 0.0
2024 | 0.0
2025 and thereafter | 0.0
Indefinite | 3.2
Total | $ 3.2

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