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DISCONTINUED OPERATIONS AND OTHER DIVESTITURES - Summary of Comparative Financial Results (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 26, 2019 | Feb. 24, 2019 | Nov. 25, 2018 | Aug. 26, 2018 | May 27, 2018 | Feb. 25, 2018 | Nov. 26, 2017 | Aug. 27, 2017 | May 26, 2019 | May 27, 2018 | May 28, 2017
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 | $ (1.9) | $ 0.0 | $ (0.3) | $ 14.5 | $ 0.4 | $ (0.3) | $ (1.9) | $ 14.3 | $ 102.0
Net income (loss) from discontinued operations attributable to Conagra Brands, Inc. |  |  |  |  |  |  |  |  | (1.9) | 14.3 | 95.2
Lamb Weston | Spinoff |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 1,407.9
Income (loss) from operations of discontinued operations before income taxes |  |  |  |  |  |  |  |  | 0.0 | (0.3) | 172.3
Income (loss) before income taxes and equity method investment earnings |  |  |  |  |  |  |  |  | 0.0 | (0.3) | 172.3
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 2.8 | (14.6) | 87.5
Equity method investment earnings |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 15.9
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  | (2.8) | 14.3 | 100.7
Less: Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 6.8
Net income (loss) from discontinued operations attributable to Conagra Brands, Inc. |  |  |  |  |  |  |  |  | (2.8) | 14.3 | 93.9
Private Brands | Discontinued operations |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss on sale of business |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (1.6)
Income (loss) from operations of discontinued operations before income taxes |  |  |  |  |  |  |  |  | 0.9 | 0.4 | 3.9
Income (loss) before income taxes and equity method investment earnings |  |  |  |  |  |  |  |  | 0.9 | 0.4 | 2.3
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 0.0 | 0.5 | (0.3)
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  | $ 0.9 | $ (0.1) | $ 2.6

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