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Valuation and Qualifying Accounts and Reserves (Schedule II) (Details) - Deferred Tax Asset Valuation Allowance - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Beginning balance | $ 124.5 | $ 106.6 | $ 97.5
Additions | 33.5 | 17.9 | 9.1
Ending balance | $ 158.0 | $ 124.5 | $ 106.6

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- Definition SEC Schedule, 12-09, Valuation Allowances And Reserves, Additions (Deductions) + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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