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DIVESTITURES AND ASSETS HELD FOR SALE - Divestitures (Narrative) (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Dec. 07, 2020 | Nov. 29, 2020 | Aug. 30, 2020 | Feb. 23, 2020 | Nov. 24, 2019 | Aug. 25, 2019 | Nov. 29, 2020 | Nov. 24, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business |  |  |  |  |  |  | $ 8.6 | $ 139.0
Gain from sales of businesses |  |  |  |  |  |  | 5.3 | (1.5)
Asset impairment charges |  |  |  |  |  |  | $ 3.9 | 105.9
Refrigerated & Frozen |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  | $ 27.6 |  |  |
Grocery & Snacks |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Asset impairment charges |  |  | $ 3.0 |  | 11.1 |  |  | 54.4
H.K. Anderson Business |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business |  | $ 8.5 |  |  |  |  |  |
H.K. Anderson Business | Selling, general and administrative expenses |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain from sales of businesses |  | $ 5.3 |  |  |  |  |  |
Lender's Bagel Business |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business |  |  |  | $ 33.3 |  |  |  |
Lender's Bagel Business | Selling, general and administrative expenses | Refrigerated & Frozen |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  | 27.6 |  |  |
Peanut Butter Manufacturing Facility |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business |  |  |  | $ 24.8 |  |  |  |
Peanut Butter Manufacturing Facility | Selling, general and administrative expenses |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  | 11.1 |  |  | $ 23.0
DSD Snacks Business | Grocery & Snacks |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business |  |  |  |  | $ 137.5 |  |  |
DSD Snacks Business | Selling, general and administrative expenses |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  | $ 31.4 |  |
Peter Pan Peanut Butter Business | Subsequent Event |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net cash proceeds from sales of business | $ 102.0 |  |  |  |  |  |  |

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