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DISCONTINUED OPERATIONS AND OTHER DIVESTITURES - Summary of Comparative Financial Results, Income Statement Items (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 24, 2019 | Feb. 25, 2018 | Feb. 24, 2019 | Feb. 25, 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 | $ 14.5 | $ (1.9) | $ 14.6
Lamb Weston | Discontinued operations, spinoff |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Loss from discontinued operations before income taxes |  | 0.0 | 0.0 | (0.3)
Income tax expense (benefit) |  | (14.5) | 2.8 | (14.6)
Income (loss) from discontinued operations, net of tax |  | $ 14.5 | $ (2.8) | $ 14.3

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