Share-Based Compensation - Compensation Expense for Share-Based Awards (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total share-based compensation expense | $ 10.3 | $ 9.9 | $ 28.1 | $ 29.2 |
| Income tax benefit | (2.6) | (2.5) | (7.0) | (7.3) |
| Share-based compensation expense, net of tax benefit | 7.7 | 7.4 | 21.1 | 21.9 |
| Restricted Stock | ||||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total share-based compensation expense | 6.1 | 6.0 | 20.0 | 19.9 |
| Performance Units | ||||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Total share-based compensation expense | $ 4.2 | $ 3.9 | $ 8.1 | $ 9.3 |