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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 | 9 Months Ended
--- | --- | ---
Feb. 23, 2020 | Feb. 24, 2019 | Feb. 23, 2020 | Feb. 24, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred |  |  | $ (8.0) |
Commodity contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | $ (5.7) | $ 0.8 | (12.5) | $ (3.4)
Commodity contracts | Reporting segments |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | (1.9) | 1.0 | (3.3) | 0.4
Commodity contracts | Reporting segments | Net derivative losses allocated to Grocery & Snacks |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | (0.9) | 0.0 | (1.5) | (1.0)
Commodity contracts | Reporting segments | Refrigerated & Frozen |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | 0.0 | (0.2) | (0.7) | (0.7)
Commodity contracts | Reporting segments | Net derivative gains allocated to International |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | (0.8) | 1.3 | (1.1) | 2.4
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) | 0.0 | (0.3)
Commodity contracts | Corporate |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gross derivative gains (losses) incurred | $ (3.8) | $ (0.2) | $ (9.2) | $ (3.8)

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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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