v3.25.2
Background and Basis of Presentation - Summary of Earnings Per Share, Weighted Average Common Shares and Potential Common Shares Outstanding (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator:        
Income (loss) from continuing operations $ 29.4 $ (56.2) $ 319.1 $ (299.2)
Income from discontinued operations, net of tax 2.4 100.6 496.7 9.9
Net income (loss) 31.8 44.4 815.8 (289.3)
Dividends on Series A convertible preferred stock (17.1) (16.2) (34.0) (32.2)
Net income (loss) attributable to common stockholders $ 14.7 $ 28.2 $ 781.8 $ (321.5)
Denominator:        
Weighted average common shares outstanding - basic 218.1 213.5 217.2 212.9
Dilutive effect of as-if converted Series A convertible preferred stock 0.0 0.0 45.0 0.0
Dilutive effect of equity-based awards 9.2 0.0 10.1 0.0
Weighted average common shares outstanding - diluted 227.3 213.5 272.3 212.9
Basic:        
Earnings (loss) from continuing operations per share $ 0.06 $ (0.34) $ 1.31 $ (1.56)
Earnings from discontinued operations per share 0.01 0.47 2.29 0.05
Earnings (loss) per share 0.07 0.13 3.6 (1.51)
Diluted:        
Earnings (loss) from continuing operations per share 0.05 (0.34) 1.17 (1.56)
Earnings from discontinued operations per share 0.01 0.47 1.83 0.05
Earnings (loss) per share $ 0.06 $ 0.13 $ 3 $ (1.51)