GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Narrative (Details)	3 Months Ended				9 Months Ended
	Feb. 28, 2021 USD ($)	Aug. 30, 2020 USD ($) segment	Feb. 23, 2020 USD ($)	Aug. 25, 2019 USD ($)	Feb. 28, 2021 USD ($)	Feb. 23, 2020 USD ($)
Goodwill [Line Items]
Fair value measurements discounted cash flow period		5 years
Remaining weighted average life of amortizing intangible assets					20 years
Amortization expense	$ 14,900,000		$ 14,900,000		$ 44,800,000	$ 44,900,000
Average amortization annual expense in year one	54,500,000				54,500,000
Average amortization annual expense in year two	54,500,000				54,500,000
Average amortization annual expense in year three	54,500,000				54,500,000
Average amortization annual expense in year four	54,500,000				54,500,000
Average amortization annual expense in year five	$ 54,500,000				$ 54,500,000
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				$ 15,800,000
Refrigerated & Frozen | Sides, Components, Enhancers | Maximum
Goodwill [Line Items]
Percentage of fair value in excess of carrying value		20.00%
Refrigerated & Frozen and Grocery & Snacks | Selling, general and administrative expenses | Brands and Trademarks
Goodwill [Line Items]
Impairment charges for indefinite lived intangibles				$ 19,300,000