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Goodwill And Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 29, 2020
Mar. 31, 2019
Mar. 29, 2020
Mar. 31, 2019
Sep. 30, 2019
Intangible Assets [Line Items]          
Goodwill $ 1,324.1   $ 1,324.1   $ 1,328.1
Impairment of indefinite lived intangible assets     24.2    
Amortization expense 16.9 $ 17.4 $ 34.0 $ 50.2  
Coevorden Operations [Member]          
Intangible Assets [Line Items]          
Percentage of reporting units exceeded carrying values by     17.00%    
Impairment of definite lived intangible assets     $ 7.6    
Tradenames [Member] | Coevorden Operations [Member]          
Intangible Assets [Line Items]          
Indefinite-lived intangible assets 3.3   3.3    
Impairment of indefinite lived intangible assets     16.6    
Global Pet Care [Member]          
Intangible Assets [Line Items]          
Goodwill $ 429.4   $ 429.4   $ 430.4
Home And Personal Care [Member]          
Intangible Assets [Line Items]          
Amortization expense       $ 15.5