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BUSINESS SEGMENTS AND RELATED INFORMATION (Narrative) (Details) $ in Millions | 12 Months Ended
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May. 31, 2015 USD ($) employee Segment | May. 25, 2014 USD ($) | May. 26, 2013 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | Segment | 3 |  |
Cumulative net derivative losses from economic hedges recognized in corporate | $ 23.3 |  |
Net derivative losses recognized in general corporate expenses | 23.7 |  |
Derivative gains to be reclassified to segment operating results thereafter | 0.4 |  |
Expect to reclassify losses in next year | 23.5 |  |
Expect to reclassify gains | $ 0.2 |  |
Number of employees | employee | 32,900 |  |
Percentage of employees in party to collective bargaining agreements | 32.00% |  |
Percentage of employees in party to collective bargaining agreements schedule to expire in next year | 25.00% |  |
Foreign net sales, including sales by domestic segments to customers | $ 1,900.0 | $ 2,000.0 | $ 1,700.0
Percentage of consolidated net sales in consumer food segment accounted by Wal-Mart Stores, Inc. and its affiliates | 18.00% | 19.00% | 20.00%
Percentage of consolidated net receivables in commercial foods accounted by Wal-Mart Stores, Inc. and its affiliates | 16.00% | 16.00% |
Consumer Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative losses recognized in general corporate expenses | $ 18.9 |  |
Private Brands |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative losses recognized in general corporate expenses | 5.2 |  |
Commercial Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Net derivative losses recognized in general corporate expenses | $ 1.4 |  |

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