Financial Instruments (Cash Flow and Fair Value Hedges Location and Amounts Recognized) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Total presented in consolidated income statements that includes effects of hedging below
Sales	$ 2,931.5	$ 2,997.4
Cost of sales	2,016.5	2,067.2
Other non-operating income (expense), net	38.9	(14.8)
(Gain) Loss Effects of Cash Flow Hedging:
Tax effects	(27.8)	12.8
Net (Gain) Loss Reclassified from OCI to Income	91.9	(42.2)
Cash flow hedges | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.2	0.3
Tax effects	0.0	(0.1)
Net (Gain) Loss Reclassified from OCI to Income	0.2	0.2
Cash flow hedges | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.9	1.3
Tax effects	(0.1)	(0.3)
Net (Gain) Loss Reclassified from OCI to Income	0.8	1.0
Cash flow hedges | Interest Expense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.5	1.3
Tax effects	(0.2)	(0.5)
Net (Gain) Loss Reclassified from OCI to Income	0.3	0.8
Cash flow hedges | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	118.1	(57.9)
Tax effects	(27.5)	13.7
Net (Gain) Loss Reclassified from OCI to Income	90.6	(44.2)
Cash flow hedges | Forward exchange contracts | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.2	0.3
Cash flow hedges | Forward exchange contracts | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.9	1.3
Cash flow hedges | Forward exchange contracts | Interest Expense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0
Cash flow hedges | Forward exchange contracts | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	129.3	(74.9)
Cash flow hedges | Forward exchange contracts, excluded components | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0
Cash flow hedges | Forward exchange contracts, excluded components | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0
Cash flow hedges | Forward exchange contracts, excluded components | Interest Expense
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0
Cash flow hedges | Forward exchange contracts, excluded components | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	6.1	5.7
Cash flow hedges | Other | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0
Cash flow hedges | Other | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0
Cash flow hedges | Other | Interest Expense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.5	1.3
Cash flow hedges | Other | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(17.3)	11.3
Fair Value Hedges | Sales
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0
Fair Value Hedges | Cost of Sales
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0
Fair Value Hedges | Interest Expense
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0
Fair Value Hedges | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0
Fair Value Hedges | Other | Sales
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0
Fair Value Hedges | Other | Cost of Sales
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0
Fair Value Hedges | Other | Interest Expense
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	(10.9)	26.1
Derivatives designated as hedging instruments	10.9	(26.1)
Fair Value Hedges | Other | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0
Derivatives designated as hedging instruments	$ 0.0	$ 0.0