Financial Instruments and Risk Management (Schedule of Gains and Losses on Derivative Instruments) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2024 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration] | Nonoperating Income (Expense) | Nonoperating Income (Expense) | |
| FX contract | Designated as hedge | Cash flow hedge | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (loss) recognized in OCI | $ 4.8 | $ (2.4) | |
| Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) | 7.7 | $ 1.1 | |
| FX contract | Not designated as hedge | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (loss) recognized in income | $ 0.9 | $ 1.1 | |