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GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 30, 2020 USD ($) segment | Aug. 25, 2019 USD ($) | May 30, 2021 USD ($) | May 31, 2020 USD ($) | May 26, 2019 USD ($)
Goodwill [Line Items] |  |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount |  |  | 50.00% |  |
Fair value measurements discounted cash flow period | 5 years |  |  |  |
Remaining weighted average life of amortizing intangible assets |  |  | 19 years |  |
Amortization expense recognized |  |  | $ 59,700,000 | $ 59,800,000 | $ 49,100,000
Minimum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Fair value measurement inputs terminal growth rate | 1.00% |  |  |  |
Sides, Components, Enhancers |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Fair value measurement inputs discount rate | 6.25% |  |  |  |
Refrigerated & Frozen |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Number of reporting units | segment | 2 |  |  |  |
Goodwill impairment loss | $ 0 |  |  |  |
Impairment charges for indefinite lived intangibles |  |  | 76,900,000 | 110,800,000 |
Refrigerated & Frozen | Sides, Components, Enhancers | Maximum |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount | 20.00% |  |  |  |
Refrigerated & Frozen and Grocery & Snacks | SG&A expenses | Brands and Trademarks |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Impairment charges for indefinite lived intangibles |  | $ 19,300,000 | 90,900,000 | 146,200,000 |
Grocery & Snacks |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Impairment charges for indefinite lived intangibles |  |  | $ 13,000,000.0 | $ 46,400,000 | 76,500,000
Grocery & Snacks | SG&A expenses |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Impairment charges for indefinite lived intangibles |  |  |  |  | 76,500,000
International | SG&A expenses |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Impairment charges for indefinite lived intangibles |  |  |  |  | $ 13,100,000

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