Derivative Instruments and Hedging Activities (Notional Value and Change in Fair Value of Net Investment Hedges) (Details) - Cross currency swap contracts - Designated as Hedging Instrument - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Derivative [Line Items] | |||||
| Gain (Loss) Recognized in Other Comprehensive Income , Before-Tax Amount | $ 0.6 | $ (49.3) | $ 6.2 | $ (59.3) | |
| Gain (Loss) Recognized in Other Comprehensive Income , Income Tax Expense (Benefit) | 0.1 | (12.7) | 1.6 | (15.3) | |
| Gain (Loss) Recognized in Other Comprehensive Income, After-Tax Amount | 0.5 | $ (36.6) | 4.6 | $ (44.0) | |
| Net Investment Hedging | |||||
| Derivative [Line Items] | |||||
| Notional amount | $ 600.0 | $ 600.0 | $ 600.0 | ||