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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of Comprehensive Income [Abstract]      
Net (loss) income $ (42.5) $ 403.5 $ 815.6
Postretirement plans (net of $0.0 tax provisions in each period) (40.8) (46.5) (53.8)
Foreign currency translation adjustment 3.1 (4.3) 0.9
Other comprehensive loss, net of income taxes (37.7) (50.8) (52.9)
Comprehensive (loss) income (80.2) 352.7 762.7
Less: Net income attributable to noncontrolling interests 10.4 32.6 56.0
Comprehensive (loss) income attributable to common stockholders $ (90.6) $ 320.1 $ 706.7