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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 24, 2019 | Aug. 25, 2019 | Nov. 25, 2018 | Nov. 24, 2019 | Nov. 25, 2018 | May 26, 2019
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges |  |  |  | $ 105.9 | $ 2.3 |
Carrying amount of long-term debt (including current installments) | $ 10,470.0 |  |  | 10,470.0 |  | $ 10,680.0
Estimated fair value of debt | 11,610.0 |  |  | 11,610.0 |  | $ 11,240.0
Grocery & Snacks |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges | 11.1 |  |  | 54.4 |  |
Indefinite-lived brand impairment charges |  | $ 3.5 |  |  |  |
Refrigerated & Frozen |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges | $ 27.6 |  |  | 27.6 |  |
Indefinite-lived brand impairment charges |  | $ 15.8 |  |  |  |
General Corporate Expenses |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges |  |  | $ 1.3 | $ 2.9 | $ 1.3 |

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