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 | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Derivative [Line Items] | |||||
| Gain (Loss) Recognized in Other Comprehensive Income , Before-Tax Amount | $ 3.9 | $ 0.7 | $ 10.1 | $ (58.6) | |
| Gain (Loss) Recognized in Other Comprehensive Income , Income Tax Expense (Benefit) | 1.0 | 0.2 | 2.6 | (15.1) | |
| Gain (Loss) Recognized in Other Comprehensive Income, After-Tax Amount | 2.9 | $ 0.5 | 7.5 | $ (43.5) | |
| Net Investment Hedging | |||||
| Derivative [Line Items] | |||||
| Notional amount | $ 600.0 | $ 600.0 | $ 600.0 | ||