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Contingencies And Commitments (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended3 Months Ended12 Months Ended
Sep. 30, 2011
Jun. 30, 2011
Jun. 30, 2011
Boarhead Farms [Member]
Aug. 18, 2008
Boarhead Farms [Member]
Sep. 30, 2011
Duty Drawback [Member]
Jun. 30, 2008
Export Regulations Violations [Member]
Loss Contingencies [Line Items]      
Increase (decrease) in environmental remediation liability$ 0     
Environmental remediation liability4.94.9    
Percentage of past remediating costs including prejudgment interest   80.00%  
Percentage of future remediating costs   80.00%  
Contingent liability  21.8   
Settlement offer    1.1 
Settlement agreement, consideration value$ (21.8)     
Foreign nationals employed, exposed to protected technical data     40