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Income Taxes, Tax Credits and Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |  |
Gross Unrecognized Tax Benefits, Including Interest | $ 7.8 | $ 7.8 | $ 10.1 | $ 4.1
Reconciliation of the total amounts of unrecognized tax benefits [Roll Forward] |  |  |  |
Balance at January 1 |  | 9.7 | 3.7 | 3.7
Gross Increases - Tax Positions Prior Periods |  | 0.5 | 5.9 | 0.1
Gross Decreases - Tax Positions Prior Periods |  | (2.1) | (0.2) | 0.0
Gross Increases - Current Period Tax Positions |  | 0.0 | 0.5 | 0.6
Decreases - Settlements with Taxing Authorities |  | (0.6) | (0.2) | (0.1)
Reductions - Lapse of Statute of Limitations |  | 0.0 | 0.0 | (0.6)
Balance at December 31 | 7.5 | 7.5 | 9.7 | 3.7
Possible Decrease in Unrecognized Tax Benefits in 2017 | 0.2 | 0.2 |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax Credit Carryforward, Amount | 52.9 | 52.9 |  |
Tax Credit Carryforwards | 52.9 | 52.9 | 57.6 |
Gross Unrecognized Tax Benefits, Including Interest | 7.8 | 7.8 | 10.1 | 4.1
Income Tax Provision |  | 172.3 | $ 141.0 | $ 98.0
SEC Schedule, 12-09, Valuation Allowance, Tax Credit Carryforward |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Income Tax Provision | (21.0) |  |  |
General Business Credits [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax Credit Carryforwards | 5.7 | 5.7 |  |
State Tax Credits [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Tax Credit Carryforwards | $ 47.2 | $ 47.2 |  |

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