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Commitments and Contingencies (Pace) (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2012
Pace, Florida [Member]
Sep. 30, 2006
Pace, Florida [Member]
yr
Sep. 30, 2006
Segment Discontinued Operations Member
Pace, Florida [Member]
Loss Contingencies [Line Items]            
Accrual for environmental loss contingencies       $ 34.1 $ 42.0  
Years to complete environmental remediation         20  
Change in estimated exposure       0    
Pretax environmental expense 44.7 34.0 31.6     42.0
Environmental loss contingencies estimated costs through completion, maximum       52    
Environmental loss contingencies estimated costs through completion, minimum       $ 42