Financial Instruments and Risk Management (Schedule of Gains and Losses on Derivative Instruments) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Mar. 31, 2025 |
Dec. 31, 2024 |
Mar. 31, 2024 |
Mar. 31, 2025 |
Mar. 31, 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) | 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 | $ (2.4) | $ 0.7 | |||
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) | $ (2.8) | $ 4.8 | 4.9 | $ 1.5 | |
FX contract | Not designated as hedge | |||||
Derivative Instruments, Gain (Loss) [Line Items] | |||||
Gain (loss) recognized in income | $ 0.3 | $ 1.7 | $ 0.6 | $ 0.6 |