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BUSINESS SEGMENTS AND RELATED INFORMATION - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 27, 2018 USD ($) | Feb. 25, 2018 USD ($) | Nov. 26, 2017 USD ($) | Aug. 27, 2017 USD ($) | May 28, 2017 USD ($) | Feb. 26, 2017 USD ($) | Nov. 27, 2016 USD ($) | Aug. 28, 2016 USD ($) | May 27, 2018 USD ($) segment | May 28, 2017 USD ($) | May 29, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reporting segments | segment |  |  |  |  |  |  |  |  | 5 |  |
Cumulative net derivative losses from economic hedges recognized in general corporate expenses | $ 3.2 |  |  |  |  |  |  |  | $ 3.2 |  |
Segment operating results losses expected to be reclassified in fiscal 2018 |  |  |  |  |  |  |  |  | 2.5 |  |
Segment operating results losses expected to be reclassified in fiscal 2019 and thereafter |  |  |  |  |  |  |  |  | 0.7 |  |
Total depreciation expense |  |  |  |  |  |  |  |  | 222.1 | $ 234.4 | $ 243.9
Net sales | 1,966.2 | $ 1,994.5 | $ 2,173.4 | $ 1,804.2 | $ 1,861.7 | $ 1,981.2 | $ 2,088.4 | $ 1,895.6 | 7,938.3 | 7,826.9 | 8,664.1
Payable to suppliers who utilize third-party service | $ 103.1 |  |  |  |  |  |  |  | 103.1 |  |
Grocery & Snacks |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 3,287.0 | 3,208.8 | 3,377.1
Refrigerated & Frozen |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,753.0 | 2,652.7 | 2,867.8
International |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 843.5 | 816.0 | 846.6
Foodservice |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,054.8 | 1,078.3 | 1,104.5
Outside of the United States |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 918.4 | $ 887.2 | $ 937.9
Customer Concentration Risk | Net sales | Wal-Mart Stores, Inc. and its affiliates |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales attributable to largest customer |  |  |  |  |  |  |  |  | 24.00% | 24.00% | 23.00%
Customer Concentration Risk | Net receivables | Wal-Mart Stores, Inc. and its affiliates |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales attributable to largest customer |  |  |  |  |  |  |  |  | 25.00% | 26.00% |

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