Financial Instruments (Currency Price Risk Management Instruments) (Details) - Forward exchange contracts - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022
Derivative [Line Items]
US$ Notional	$ 5,902.3	$ 5,601.5
Years Average Maturity	8 months 12 days	9 months 18 days
Designated as hedging instrument | Cash flow hedges
Derivative [Line Items]
US$ Notional	$ 4,877.6	$ 4,525.0
Years Average Maturity	7 months 6 days	8 months 12 days
Designated as hedging instrument | Net investment hedges
Derivative [Line Items]
US$ Notional	$ 616.5	$ 542.2
Years Average Maturity	1 year 10 months 24 days	2 years 2 months 12 days
Not designated as hedging instrument
Derivative [Line Items]
US$ Notional	$ 408.2	$ 534.3
Years Average Maturity	2 months 12 days	3 months 18 days