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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. 25, 2019 | Aug. 26, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | $ (6.9) |
Commodity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | (7.3) | $ (6.5)
Commodity contracts | Reporting segments |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | (0.1) | (0.1)
Commodity contracts | Reporting segments | Net derivative losses allocated to Grocery & Snacks |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | (0.1) | (0.2)
Commodity contracts | Reporting segments | Refrigerated & Frozen |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | (0.3) | (0.1)
Commodity contracts | Reporting segments | Net derivative gains allocated to International |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | 0.1 | 0.3
Commodity contracts | Reporting segments | Net derivative gains (losses) allocated to Foodservice |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | 0.2 | (0.1)
Commodity contracts | Net derivative losses recognized in general corporate expenses |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross derivative gains (losses) incurred | $ (7.2) | $ (6.4)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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