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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. 26, 2017 | Feb. 28, 2016 | Feb. 26, 2017 | Feb. 28, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income (loss) from discontinued operations, net of tax | $ 0.7 | $ 134.9 | $ 103.7 | $ (1,031.9)
Net income (loss) from discontinued operations attributable to Conagra Brands, Inc. | 0.7 | 133.6 | 96.9 | (1,038.4)
Lamb Weston | Discontinued operations, spinoff |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net sales | 0.0 | 723.8 | 1,407.9 | 2,200.9
Income (loss) from discontinued operations before income taxes and equity method investment earnings | (0.8) | 137.5 | 174.3 | 353.0
Income (loss) before income taxes and equity method investment earnings | (0.8) | 137.5 | 174.3 | 353.0
Income tax expense (benefit) | (0.6) | 57.3 | 88.0 | 133.3
Equity method investment earnings | 0.0 | 36.1 | 15.9 | 56.3
Income (loss) from discontinued operations, net of tax | (0.2) | 116.3 | 102.2 | 276.0
Less: Net income attributable to noncontrolling interests | 0.0 | 1.3 | 6.8 | 6.5
Net income (loss) from discontinued operations attributable to Conagra Brands, Inc. | (0.2) | 115.0 | 95.4 | 269.5
Private Brands | Discontinued operations, disposed of by sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net sales | 0.0 | 634.0 | (0.9) | 2,484.7
Loss on sale of businesses | (4.1) | 0.0 | (3.1) | 0.0
Goodwill and long-lived asset impairment charges | 0.0 | (22.5) | 0.0 | (1,921.1)
Income (loss) from discontinued operations before income taxes and equity method investment earnings | 3.0 | 61.9 | 1.7 | 167.6
Income (loss) before income taxes and equity method investment earnings | (1.1) | 39.4 | (1.4) | (1,753.5)
Income tax expense (benefit) | (2.0) | 20.8 | (2.9) | (445.6)
Income (loss) from discontinued operations, net of tax | $ 0.9 | $ 18.6 | $ 1.5 | $ (1,307.9)

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