Financial Instruments and Risk Management (Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring fair value measurement - Level 2 - USD ($) $ in Millions |
Dec. 31, 2022 |
Sep. 30, 2022 |
---|---|---|
Derivative [Line Items] | ||
Deferred compensation | $ (22.6) | $ (21.8) |
Derivatives - foreign currency contracts | (3.4) | 13.3 |
Net liabilities at estimated fair value | $ (26.0) | $ (8.5) |