Contingencies and Commitments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended			12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011 Boarhead Farms	Jun. 30, 2011 Boarhead Farms	Aug. 18, 2008 Boarhead Farms	Jun. 30, 2008 Export Regulations Violations item
Loss contingencies
Increase made by the company in the liabilities of environmental remediation costs	$ 0.3	$ 0.7	$ 0.3
Environmental remediation liability	14.8	14.5
Percentage of past remediating costs including prejudgment interest						80.00%
Percentage of future remediating costs						80.00%
Contingent liability					21.8
Payment for settlement		$ 21.8		$ 21.8
Foreign nationals employed, exposed to protected technical data							40