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Earnings Per Share - Reconciliation of Weighted-Average Shares (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share [Abstract]        
Net Income (Loss) Attributable to Parent $ 188.1 $ 64.6 $ 265.3 $ 239.7
Basic (in shares) 70.7 72.4 70.9 72.4
Effect of stock equivalents (in shares) 0.3 0.8 0.3 1.1
Diluted (in shares) 71.0 73.2 71.2 73.5