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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Statement of Comprehensive Income [Abstract]    
Net income (loss) $ 282.8 $ (120.6)
Postretirement plans (net of $0.0 tax provisions in each period) (13.4) (13.4)
Foreign currency translation adjustment (0.2) 1.9
Other comprehensive loss, net of income taxes (13.6) (11.5)
Comprehensive income (loss) 269.2 (132.1)
Less: Net income (loss) attributable to noncontrolling interests 14.3 (1.1)
Comprehensive income (loss) attributable to common stockholders $ 254.9 $ (131.0)