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Fair Value Of Financial Instruments (Schedule Of Carrying Values And Fair Values For Financial Instruments) (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Sep. 30, 2018
Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments $ 237.2  
Derivative Assets 7.9 $ 8.9
Derivative Liabilities 1.0 0.8
Debt 2,432.3 4,806.9
Carrying Amount [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments 237.2  
Derivative Assets 7.9 8.9
Derivative Liabilities 1.0 0.8
Debt 2,358.1 4,651.2
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments 237.2  
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Assets 7.9 8.9
Derivative Liabilities 1.0 0.8
Debt 2,432.3 4,806.9
SB/RH [Member] | Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 2,355.2 4,330.9
SB/RH [Member] | Carrying Amount [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt 2,283.3 4,233.3
SB/RH [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt $ 2,355.2 $ 4,330.9