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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 30, 2020 | Nov. 24, 2019 | Aug. 25, 2019 | Nov. 29, 2020 | Nov. 24, 2019 | May 31, 2020
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |  |  |  |
Asset impairment charges |  |  |  | $ 3.9 | $ 105.9 |
Carrying amount of long-term debt (including current installments) |  |  |  | 8,900.0 |  | $ 9,750.0
Estimated fair value of debt |  |  |  | $ 10,850.0 |  | $ 11,350.0
Grocery & Snacks |  |  |  |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |  |  |  |
Asset impairment charges | $ 3.0 | $ 11.1 |  |  | $ 54.4 |
Indefinite-lived brand impairment charges |  |  | $ 3.5 |  |  |
Refrigerated & Frozen |  |  |  |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |  |  |  |
Asset impairment charges |  | 27.6 |  |  |  |
Indefinite-lived brand impairment charges |  |  | $ 15.8 |  |  |
Corporate segment |  |  |  |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |  |  |  |
Asset impairment charges |  | $ 2.9 |  |  |  |

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