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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Net earnings $ 196.3 $ 107.7 $ 46.0
Defined benefit pension and other postretirement employee benefits:      
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax (3.6) 2.8 4.7
Amortization of actuarial (gain) loss included in net periodic cost, net of tax of $(0.1), $(0.1) and $1.6 (0.3) (0.2) 4.7
Other comprehensive (loss) income, net of tax (3.8) 2.6 9.3
Comprehensive income $ 192.5 $ 110.3 $ 55.3