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Earnings (Loss) Per Share - Reconciliation of Weighted-Average Shares (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]        
Net Income (Loss) Attributable to Parent $ 12.9 $ 74.3 $ 30.2 $ 147.3
Basic (in shares) 73.7 75.1 74.6 75.0
Unvested restricted stock units 1.1 0.5 1.1 0.5
Diluted (in shares) 74.8 75.6 75.7 75.5