Financial Instruments (Effects of Derivatives Not Designated as a Hedging Instrument) (Details) - Not designated as hedging instrument - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other Income (Expense), Net
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ 0.6	$ 1.1
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net
Other Income (Expense), Net | Forward exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ 0.6	$ 1.1
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net
Other Income (Expense), Net | Other
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ 0.0	$ 0.0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net
Other Non-Operating Income (Expense), Net
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ (0.5)	$ (0.5)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net
Other Non-Operating Income (Expense), Net | Forward exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ (1.6)	$ (0.6)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net
Other Non-Operating Income (Expense), Net | Other
Derivative Instruments, Gain (Loss) [Line Items]
Total (Gain) Loss Recognized in Income	$ 1.1	$ 0.1
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating income (expense), net	Other non-operating income (expense), net