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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 | 6 Months Ended
--- | --- | ---
Nov. 26, 2017 | Nov. 27, 2016 | Nov. 26, 2017 | Nov. 27, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred |  |  | $ (0.6) |
Commodity contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | $ 3.0 | $ 3.0 | (4.4) | $ 2.7
Commodity contracts | Reporting segments |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | (4.1) | 3.8 | (5.5) | 2.8
Commodity contracts | Reporting segments | Net derivative gains (losses) allocated to Grocery & Snacks |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | (0.4) | 2.4 | (1.0) | 2.0
Commodity contracts | Reporting segments | Net derivative gains allocated to Refrigerated & Frozen |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | 0.1 | 0.7 | 0.1 | 0.5
Commodity contracts | Reporting segments | Net derivative gains (losses) allocated to International |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | (3.7) | 0.2 | (4.4) | 0.2
Commodity contracts | Reporting segments | Net derivative gains (losses) allocated to Foodservice |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | (0.1) | 0.5 | (0.2) | 0.2
Commodity contracts | Reporting segments | Net derivative losses allocated to Commercial |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | 0.0 | 0.0 | 0.0 | (0.1)
Commodity contracts | Net derivative gains (losses) recognized in general corporate expenses |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net derivative gains (losses) incurred | $ 7.1 | $ (0.8) | $ 1.1 | $ (0.1)

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