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Share-Based Compensation - Share-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]          
Share-based compensation $ 15.1 $ 13.6 $ 29.8 $ 23.3  
Tax benefit 1.9 $ 2.2 3.7 $ 4.4  
Compensation expense related to share-based compensation $ 91.0   $ 91.0   $ 70.9
Weighted average period over which compensation expense will be recognized     3 years