Commitments and Contingencies (Litigation and Environmental) (Narrative) (Details)
In Millions, unless otherwise specified
6 Months Ended 1 Months Ended 6 Months Ended
Mar. 31, 2015
Environmental [Member]
USD ($)
Sites
Sep. 30, 2014
Environmental [Member]
USD ($)
Sep. 30, 2010
Alleged Anticompete Litigation [Member]
BRL
Mar. 31, 2015
Alleged Anticompete Litigation [Member]
USD ($)
Mar. 31, 2015
Alleged Anticompete Litigation [Member]
BRL
Loss Contingencies [Line Items]          
Civil fines imposed     179.2 $ 56.0  
Provision for litigation       0  
Maximum of loss contingency range subject to interest       56.0 179.2
Accrual for environmental loss contingencies 83.6 86.2      
Approximate number of sites on which settlement has not been reached 36        
Accrual for environmental loss contingencies, Maximum payout period, years 30 years        
Accrual for environmental loss contingencies, Minimum exposure 83        
Accrual for environmental loss contingencies, Maximum exposure $ 97