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Derivatives (Summary Of Impact Of Effective And Ineffective Portions Of Cash Flow Hedges And Gain (Loss) Recognized) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax $ 16.4 $ (31.6) $ 11.1
Effective Portion, Gain (Loss) Reclassified to Operations (0.2) (0.5) (2.3)
Discontinued Operations [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Effective Portion, Gain (Loss) Reclassified to Operations (6.7) 11.3 3.4
Ineffective Portion, Gain (Loss) to Operations 1.2    
Other Non-Operating [Member] | Net Investment Hedge [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax 6.2 (24.0) 0.6
Interest Rate Swaps [Member] | Interest Expense [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax 4.0 (0.7) (0.4)
Effective Portion, Gain (Loss) Reclassified to Operations   (1.3) (1.9)
Interest Rate Swaps [Member] | Interest Expense [Member] | Discontinued Operations [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Effective Portion, Gain (Loss) Reclassified to Operations 1.1    
Ineffective Portion, Gain (Loss) to Operations 1.2    
Commodity Swaps [Member] | Cost of Goods Sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax (4.5) 6.2 4.5
Effective Portion, Gain (Loss) Reclassified to Operations 0.7 0.7 (1.4)
Commodity Swaps [Member] | Cost of Goods Sold [Member] | Discontinued Operations [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Effective Portion, Gain (Loss) Reclassified to Operations 2.4 4.7 (2.3)
Foreign Exchange Contracts [Member] | Net Sales [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax (0.1) 0.4 (0.4)
Effective Portion, Gain (Loss) Reclassified to Operations 0.1   (0.2)
Foreign Exchange Contracts [Member] | Cost of Goods Sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax 10.8 (13.5) 6.8
Effective Portion, Gain (Loss) Reclassified to Operations (1.0) 0.1 1.2
Foreign Exchange Contracts [Member] | Cost of Goods Sold [Member] | Discontinued Operations [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Effective Portion, Gain (Loss) Reclassified to Operations $ (10.2) $ 6.6 $ 5.7