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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statement of Comprehensive Income [Abstract]      
Net gain arising from remeasurement during the period, tax $ 2.6 $ 0.7 $ 7.8
Amortization of prior service benefits included in net income, tax (0.2) (0.2)  
Amortization of net actuarial gain included in net income, tax (1.0) $ (1.2) $ (0.2)
Reclassification adjustment for pension settlement benefits included in net income, tax $ (0.8)