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BUSINESS SEGMENTS AND RELATED INFORMATION - Schedule of Net Derivative Gains (Losses) from Economic Hedges (Details) - Commodity contracts - USD ($) $ in Millions | 12 Months Ended
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May 27, 2018 | May 28, 2017 | May 29, 2016
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | $ (0.9) | $ 0.6 | $ (7.4)
Reporting segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | (7.1) | 5.7 | (23.8)
Reporting segments | Grocery & Snacks |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | 0.2 | 3.4 | (14.4)
Reporting segments | Refrigerated & Frozen |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | (0.3) | 0.8 | (6.2)
Reporting segments | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | (6.9) | 1.6 | (0.5)
Reporting segments | Foodservice |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | (0.1) | 0.0 | (1.0)
Reporting segments | Commercial |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | 0.0 | (0.1) | (1.7)
Net derivative gains (losses) recognized in general corporate expenses |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative gains (losses) incurred | $ 6.2 | $ (5.1) | $ 16.4

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