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DISPOSAL OF LONG-LIVED ASSETS Missouri Hog Farms (Details) (USD $) In Millions | 3 Months Ended
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Jul. 31, 2011
Long-Lived Assets to be Abandoned [Line Items] |
Accelerated Depreciation | $ 4.3
Second Quarter of Fiscal 2012 [Member] |
Long-Lived Assets to be Abandoned [Line Items] |
Accelerated Depreciation | 3.2
Third Quarter of Fiscal 2012 [Member] |
Long-Lived Assets to be Abandoned [Line Items] |
Accelerated Depreciation | $ 0.7

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