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Earnings (Loss) Per Share - Reconciliation of Weighted-Average Shares (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]        
Net Income (Loss) Attributable to Parent $ 149.6 $ (29.4) $ 175.1 $ 17.3
Basic (in shares) 72.4 74.8 72.4 75.0
Effect of stock equivalents (in shares) 1.3 0.0 1.3 1.2
Diluted (in shares) 73.7 74.8 73.7 76.2