Financial Instruments (Cash Flow and Fair Value Hedges Location and Amounts Recognized) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Total presented in consolidated income statements that includes effects of hedging below
Sales	$ 3,161.0	$ 3,022.7	$ 9,435.3	$ 8,870.4
Cost of sales	2,125.0	2,040.1	6,416.9	6,110.5
Interest expense	49.4	61.4	153.4	146.2
Other non-operating income (expense), net	3.6	(6.0)	3.1	14.3
(Gain) Loss Effects of Cash Flow Hedging:
Tax effects	0.8	15.6	(9.2)	(9.9)
Net (Gain) Loss Reclassified from OCI to Income	(2.7)	(52.2)	30.2	32.7
Cash flow hedges | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	7.3	(0.3)	6.8	7.3
Tax effects	(1.8)	0.1	(1.6)	(1.5)
Net (Gain) Loss Reclassified from OCI to Income	5.5	(0.2)	5.2	5.8
Cash flow hedges | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(0.3)	(0.4)	(1.1)	0.1
Tax effects	0.1	0.0	0.3	(0.2)
Net (Gain) Loss Reclassified from OCI to Income	(0.2)	(0.4)	(0.8)	(0.1)
Cash flow hedges | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(10.1)	(67.0)	35.4	34.9
Tax effects	2.7	15.5	(7.9)	(8.1)
Net (Gain) Loss Reclassified from OCI to Income	(7.4)	(51.5)	27.5	26.8
Cash flow hedges | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(0.4)	(0.1)	(1.7)	0.3
Tax effects	(0.2)	0.0	0.0	(0.1)
Net (Gain) Loss Reclassified from OCI to Income	(0.6)	(0.1)	(1.7)	0.2
Cash flow hedges | Forward exchange contracts | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	7.3	(0.3)	6.8	7.3
Cash flow hedges | Forward exchange contracts | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0	0.0	0.0
Cash flow hedges | Forward exchange contracts | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(16.2)	(73.6)	8.8	30.8
Cash flow hedges | Forward exchange contracts | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(0.4)	(0.1)	(1.7)	0.3
Cash flow hedges | Forward exchange contracts, excluded components | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0	0.0	0.0
Cash flow hedges | Forward exchange contracts, excluded components | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0	0.0	0.0
Cash flow hedges | Forward exchange contracts, excluded components | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	5.4	2.7	16.2	13.1
Cash flow hedges | Forward exchange contracts, excluded components | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Cash Flow Hedging:
Amount excluded from effectiveness testing recognized in earnings based on amortization approach	0.0	0.0	0.0	0.0
Cash flow hedges | Other | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0	0.0	0.0
Amount reclassified from OCI into income due to de-designation	0.0	0.0	0.0	0.0
Cash flow hedges | Other | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	(0.3)	(0.4)	(1.1)	0.1
Amount reclassified from OCI into income due to de-designation	0.0	0.0	0.0	0.0
Cash flow hedges | Other | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.7	3.7	10.4	(9.2)
Amount reclassified from OCI into income due to de-designation	0.0	0.2	0.0	0.2
Cash flow hedges | Other | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Cash Flow Hedging:
Amount reclassified from OCI into income	0.0	0.0	0.0	0.0
Amount reclassified from OCI into income due to de-designation	0.0	0.0	0.0	0.0
Fair Value Hedges | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0	0.0	0.0
Fair Value Hedges | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0	0.0	0.0
Fair Value Hedges | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0	0.0	0.0
Fair Value Hedges | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Fair Value Hedging:
Total (Gain) Loss Recognized in Income	0.0	0.0	0.0	0.0
Fair Value Hedges | Other | Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0	0.0	0.0
Fair Value Hedges | Other | Income Statement Location [Axis]: us-gaap:InterestExpenseNonoperating
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	(0.9)	8.0	1.0	8.3
Derivatives designated as hedging instruments	0.9	(8.0)	(1.0)	(8.3)
Fair Value Hedges | Other | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0	0.0	0.0
Fair Value Hedges | Other | Income Statement Location [Axis]: us-gaap:Revenues
(Gain) Loss Effects of Fair Value Hedging:
Hedged items	0.0	0.0	0.0	0.0
Derivatives designated as hedging instruments	$ 0.0	$ 0.0	$ 0.0	$ 0.0