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Shareholders' Equity - Share Repurchases (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Shareholders Equity [Abstract]      
Total number of shares repurchased and retired 1.6 4.4 3.8
Total investment $ 178.6 $ 505.0 $ 461.6