DIVESTITURES AND ASSETS HELD FOR SALE - Schedule of Assets and Liabilities Classified as Held for Sale (Details) - USD ($) $ in Millions	May 31, 2020	May 26, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held for sale		$ 36.7
Noncurrent assets held for sale	$ 3.1	262.4
Held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held for sale		9.9
Noncurrent assets held for sale		35.7
Current liabilities held for sale		5.1
Lender's Bagel Business | Held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held for sale		5.4
Noncurrent assets held for sale		62.3
Current liabilities held for sale		0.5
DSD Snacks Business | Held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held for sale		21.4
Noncurrent assets held for sale		156.2
Current liabilities held for sale		$ 4.6