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Income Taxes Expected Expirations of Federal and State Losses and Credits (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Federal |
Expirations of Operating Loss Carryforwards, Components [Abstract] |
2020 | $ 1.6
2021 | 2.3
2022 | 6.0
2023 | 4.5
2024 | 282.3
Indefinite | 186.6
Total | 483.3
State |
Expirations of Operating Loss Carryforwards, Components [Abstract] |
2020 | 0.0
2021 | 0.3
2022 | 0.3
2023 | 0.4
2024 | 148.1
Indefinite | 0.0
Total | 149.1
Research Tax Credit Carryforward | Federal |
Expirations of Tax Credit Carryforwards [Abstract] |
2020 | 0.0
2021 | 0.0
2022 | 0.0
2023 | 0.0
2024 | 17.3
Indefinite | 0.0
Total | 17.3
Research Tax Credit Carryforward | State |
Expirations of Tax Credit Carryforwards [Abstract] |
2020 | 0.0
2021 | 0.0
2022 | 0.0
2023 | 0.0
2024 | 0.0
Indefinite | 3.2
Total | $ 3.2

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