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Restructuring And Related Charges (Summary Of Restructuring And Related Charges) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges $ 25.4 $ 21.2 $ 69.0 $ 31.3
GAC Business Rationalization Initiative [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges 6.3 12.8 13.5 19.8
PET Rightsizing Initiative [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges 3.1 2.2 7.1 2.8
HHI Business [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges 11.6 9.0 40.4 9.1
Other Restructuring Activities [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges 4.4 (2.8) 8.0 (0.4)
Cost of Goods Sold [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges 4.9 11.2 9.9 16.4
Operating Expense [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges $ 20.5 $ 10.0 $ 59.1 $ 14.9