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BUSINESS SEGMENTS AND RELATED INFORMATION (Narrative) (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 25, 2014 USD ($) | Nov. 24, 2013 USD ($) | Feb. 24, 2013 USD ($) | May 29, 2016 USD ($) employee segment | May 31, 2015 USD ($) | May 25, 2014 USD ($) | May 27, 2012 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  | 2 |  |  |
Cumulative net derivative gains (losses) from economic hedges recognized in corporate |  |  |  | $ 3.2 |  |  |
Net derivative gains (losses) recognized in general corporate expenses |  |  |  | 3.6 |  |  |
Derivative gains (losses) to be reclassified to segment operating results thereafter |  |  |  | (0.4) |  |  |
Expect to reclassify losses in next year |  |  |  | 2.4 |  |  |
Expect to reclassify gains |  |  |  | $ 0.8 |  |  |
Number of employees | employee |  |  |  | 20,900 |  |  |
Percentage of employees in party to collective bargaining agreements |  |  |  | 36.00% |  |  |
Percentage of employees in party to collective bargaining agreements schedule to expire in next year |  |  |  | 31.00% |  |  |
Foreign net sales, including sales by domestic segments to customers |  |  |  | $ 1,500.0 | $ 1,600.0 | $ 1,700.0 |
Percentage of consolidated net sales in consumer food segment accounted by Wal-Mart Stores, Inc. and its affiliates |  |  |  | 16.00% | 16.00% | 17.00% |
Percentage of consolidated net receivables in commercial foods accounted by Wal-Mart Stores, Inc. and its affiliates |  |  |  | 20.00% | 16.00% |  |
Loan purchase under agreement |  |  |  |  |  |  | $ 40.8
Asset impairment charges |  |  |  | $ 62.6 | $ 36.0 | $ 118.9 |
Consumer Foods |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Net derivative gains (losses) recognized in general corporate expenses |  |  |  | (18.9) |  |  |
Commercial Foods |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Net derivative gains (losses) recognized in general corporate expenses |  |  |  | $ (1.4) |  |  |
Asset impairment charges | $ 5.1 | $ 8.9 | $ 10.2 |  |  |  |
Onion Supply Agreement Guarantee |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Guarantee obligation under purchase agreement |  |  |  |  |  |  | $ 25.0

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