Financial Instruments (Cash Flow and Fair Value Hedges Location and Amounts Recognized) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Total presented in consolidated income statements that includes effects of hedging below
Sales	$ 2,997.4	$ 3,174.7
Cost of sales	2,067.2	2,272.3
Interest expense	53.5	41.2
Other non-operating income (expense), net	(14.8)	(0.6)
(Gain) Loss Effects of Cash Flow Hedging:
Tax effects	12.8	21.7
Net (Gain) Loss Reclassified from OCI to Income	(42.2)	(68.7)
Cash flow hedges | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.3	0.0
Tax effects	(0.1)	0.0
Net (Gain) Loss Reclassified from OCI to Income	0.2	0.0
Cash flow hedges | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	1.3	1.2
Tax effects	(0.3)	(0.2)
Net (Gain) Loss Reclassified from OCI to Income	1.0	1.0
Cash flow hedges | Interest Expense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	1.3	1.5
Tax effects	(0.5)	(0.5)
Net (Gain) Loss Reclassified from OCI to Income	0.8	1.0
Cash flow hedges | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(57.9)	(93.1)
Tax effects	13.7	22.4
Net (Gain) Loss Reclassified from OCI to Income	(44.2)	(70.7)
Cash flow hedges | Forward exchange contracts | Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.3	0.0
Cash flow hedges | Forward exchange contracts | Cost of Sales
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	1.3	1.2
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	(74.9)	(117.8)
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	5.7	2.0
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	1.3	1.5
Cash flow hedges | Other | Other Non-Operating Income (Expense), Net
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	11.3	22.7
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	26.1	4.4
Derivatives designated as hedging instruments	(26.1)	(4.4)
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