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BUSINESS SEGMENTS AND RELATED INFORMATION - Schedule of Net Derivative Gains (Losses) from Economic Hedges of Forecasted Commodity Consumption and Foreign Currency Risk (Details) - USD ($) $ in Millions | 3 Months Ended
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Aug. 27, 2017 | Aug. 28, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | $ (6.8) |
Commodity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | (7.4) | $ (0.3)
Commodity contracts | Reporting segments |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | (1.4) | (1.0)
Commodity contracts | Reporting segments | Net derivative losses allocated to Grocery & Snacks |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | (0.6) | (0.4)
Commodity contracts | Reporting segments | Net derivative losses allocated to Refrigerated & Frozen |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | 0.0 | (0.2)
Commodity contracts | Reporting segments | Net derivative losses allocated to International |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | (0.7) | 0.0
Commodity contracts | Reporting segments | Net derivative losses allocated to Foodservice |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | (0.1) | (0.3)
Commodity contracts | Reporting segments | Net derivative losses allocated to Commercial |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | 0.0 | (0.1)
Commodity contracts | Net derivative gains (losses) recognized in general corporate expenses |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Net derivative losses incurred | $ (6.0) | $ 0.7

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