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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 | 12 Months Ended
--- | ---
May 31, 2020 | May 26, 2019 | May 27, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | $ (4.5) |  |
Commodity contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | (12.9) | $ (3.6) | $ (0.9)
Commodity contracts | Reporting segments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | (7.4) | (1.8) | (7.1)
Commodity contracts | Reporting segments | Grocery & Snacks |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | (4.7) | (2.5) | 0.2
Commodity contracts | Reporting segments | Refrigerated & Frozen |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | (2.5) | (1.5) | (0.3)
Commodity contracts | Reporting segments | International |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | 0.1 | 2.8 | (6.9)
Commodity contracts | Reporting segments | Foodservice |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | (0.3) | (0.6) | (0.1)
Commodity contracts | Corporate |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative losses incurred | $ (5.5) | $ (1.8) | $ 6.2

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