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BUSINESS SEGMENTS AND RELATED INFORMATION - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 26, 2019 USD ($) | Feb. 24, 2019 USD ($) | Nov. 25, 2018 USD ($) | Aug. 26, 2018 USD ($) | May 27, 2018 USD ($) | Feb. 25, 2018 USD ($) | Nov. 26, 2017 USD ($) | Aug. 27, 2017 USD ($) | May 26, 2019 USD ($) segment | May 27, 2018 USD ($) | May 28, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reporting segments | segment |  |  |  |  |  |  |  |  | 6 |  |
Cumulative net derivative losses from economic hedges recognized in general corporate expenses | $ 1.4 |  |  |  |  |  |  |  | $ 1.4 |  |
Net gains incurred |  |  |  |  |  |  |  |  | 1.0 | $ 0.4 |
Segment operating results gains expected to be reclassified in fiscal 2020 |  |  |  |  |  |  |  |  | 0.9 |  |
Segment operating results gains expected to be reclassified in fiscal 2021 and thereafter |  |  |  |  |  |  |  |  | 0.5 |  |
Total depreciation expense |  |  |  |  |  |  |  |  | 283.9 | 222.1 | $ 234.4
Net sales | 2,613.2 | $ 2,707.1 | $ 2,383.7 | $ 1,834.4 | $ 1,966.2 | $ 1,994.5 | $ 2,173.4 | $ 1,804.2 | 9,538.4 | 7,938.3 | 7,826.9
Payable to suppliers who utilize third-party service | $ 189.3 |  |  |  |  |  |  |  | 189.3 |  |
Grocery & Snacks |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 3,279.2 | 3,287.0 | 3,208.8
Refrigerated & Frozen |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,804.0 | 2,753.0 | 2,652.7
International |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 793.4 | 843.5 | 816.0
Foodservice |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 934.2 | 1,054.8 | 1,078.3
Outside of the United States |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 919.5 | $ 918.4 | $ 887.2
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% | 24.00%
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 |  |  |  |  |  |  |  |  | 30.00% | 25.00% |

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