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INVESTMENTS IN JOINT VENTURES (Details) - USD ($) $ in Millions | 12 Months Ended
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May 29, 2016 | May 31, 2015
Equity Method Investment, Summarized Financial Information, Statement of Earnings [Abstract] |  |
Total net sales | $ 4,479.8 | $ 4,338.6
Total gross margin | 539.0 | 570.3
Total earnings after income taxes | 250.6 | 279.4
Ardent Mills |  |
Equity Method Investment, Summarized Financial Information, Statement of Earnings [Abstract] |  |
Total net sales | 3,395.3 | 3,299.2
Total gross margin | 339.2 | 365.3
Total earnings after income taxes | 142.9 | 173.5
Equity Method Investment, Summarized Financial Information, Balance Sheet [Abstract] |  |
Current assets | 988.4 | 1,080.3
Noncurrent assets | 1,695.3 | 1,692.5
Current liabilities | 507.7 | 415.3
Noncurrent liabilities | 545.0 | 649.5
Potato joint ventures |  |
Equity Method Investment, Summarized Financial Information, Statement of Earnings [Abstract] |  |
Total net sales | 917.3 | 872.1
Total gross margin | 167.0 | 171.7
Total earnings after income taxes | 101.3 | 99.8
Equity Method Investment, Summarized Financial Information, Balance Sheet [Abstract] |  |
Current assets | 304.8 | 285.3
Noncurrent assets | 294.8 | 193.0
Current liabilities | 202.2 | 151.8
Noncurrent liabilities | 81.7 | 47.1
Others |  |
Equity Method Investment, Summarized Financial Information, Statement of Earnings [Abstract] |  |
Total net sales | 167.2 | 167.3
Total gross margin | 32.8 | 33.3
Total earnings after income taxes | 6.4 | 6.1
Equity Method Investment, Summarized Financial Information, Balance Sheet [Abstract] |  |
Current assets | 80.8 | 73.1
Noncurrent assets | 10.5 | 10.8
Current liabilities | 51.0 | 42.2
Noncurrent liabilities | $ 0.0 | $ 0.0

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