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Earnings (Loss) per Share - Schedule of Earnings (Loss) per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Subsidiary, Sale of Stock [Line Items]        
Net income (loss) - basic $ 95.5 $ (16.9) $ 18.9 $ (3.0)
Net income (loss) - diluted $ 95.5 $ (16.9) $ 18.9 $ (3.0)
Weighted-average shares outstanding:        
Basic (in shares) 97.6 95.6 97.4 95.4
Effect of dilutive securities:        
Diluted (in shares) 100.2 95.6 100.3 95.4
Earnings (loss) per share, basic (in USD per share) $ 0.98 $ (0.18) $ 0.19 $ (0.03)
Earnings (loss) per share, diluted (in USD per share) $ 0.95 $ (0.18) $ 0.19 $ (0.03)
Shares excluded from diluted per share amounts because their effect would have been anti-dilutive (in shares) 6.7 12.5 5.6 12.2
2024 Notes        
Effect of dilutive securities:        
2024 Notes (in shares) 0.5 0.0 0.6 0.0
Stock options        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 1.6 0.0 1.7 0.0
Restricted stock        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 0.5 0.0 0.6 0.0