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DIVESTITURES AND ASSETS HELD FOR SALE - Lamb Weston Spinoff (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
May 31, 2020
Feb. 23, 2020
Nov. 24, 2019
Aug. 25, 2019
May 26, 2019
Feb. 24, 2019
Nov. 25, 2018
Aug. 26, 2018
May 31, 2020
May 26, 2019
May 27, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Income (loss) from discontinued operations, net of tax $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ (1.9) $ 0.0 $ 0.0 $ (1.9) $ 14.3
Lamb Weston | Sopinoff                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Income (loss) from discontinued operations, net of tax                   $ (2.8) 14.3
Transition services income for performance of services                     $ 2.2