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Commitments and Contingencies (Guarantees and Other) (Narrative) (Details)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
USD ($)
Sep. 30, 2014
Purchase commitments - additional plant and equipment [Member]
USD ($)
Sep. 30, 2014
HYCO Feedstock Supply [Member]
USD ($)
Sep. 30, 2014
Trinidad Facility [Member]
USD ($)
Sep. 30, 2014
U K and Ireland Homecare Business [Member]
USD ($)
Sep. 30, 2014
U K and Ireland Homecare Business [Member]
GBP (£)
Guarantor Obligations [Line Items]            
Equity method investment, ownership percentage       50.00%    
Maximum potential payment under guarantees       $ 42.4 $ 32.0 £ 20.0
Exposures under the guarantee completion year       2024 2020 2020
Equity contributions or payments required 0          
Unrecorded Unconditional Purchase Obligation [Line Items]            
2015 929 700        
Unconditional purchase obligation $ 1,548   $ 650