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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statement of Comprehensive Income [Abstract]      
Net income $ 403.5 $ 815.6 $ 1,319.1
Postretirement plans (net of $0.0 tax provisions in each period) (46.5) (53.8) (53.8)
Foreign currency translation adjustment (4.3) 0.9 (1.6)
Other comprehensive loss, net of income taxes (50.8) (52.9) (55.4)
Comprehensive income 352.7 762.7 1,263.7
Less: Net income attributable to noncontrolling interests 32.6 56.0 22.0
Comprehensive income attributable to common stockholders $ 320.1 $ 706.7 $ 1,241.7