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REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 03, 2019 | Apr. 27, 2019 | Jan. 26, 2019 | Oct. 27, 2018 | Jul. 28, 2018 | Apr. 28, 2018 | Jan. 27, 2018 | Oct. 28, 2017 | Aug. 03, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax | $ 6,407,086 | $ 5,962,620 | $ 6,149,206 | $ 2,868,156 | $ 2,592,248 | $ 2,648,879 | $ 2,528,011 | $ 2,457,545 | $ 21,387,068 | $ 10,226,683 | $ 9,274,471
Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 21,324,693 | 10,169,840 | 9,210,815
Operating Segments | Other Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 228,518 | 228,465 | 232,192
Consolidation, Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | (166,143) | (171,622) | (168,536)
Supernatural |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 4,393,000 | 3,758,000 | 3,096,000
Supernatural | Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 4,393,000 | 3,758,000 | 3,096,000
Supernatural | Operating Segments | Other Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Supernatural | Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Independents |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 3,179,000 | 2,668,000 | 2,490,000
Independents | Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 3,179,000 | 2,668,000 | 2,490,000
Adjustment to revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  |  | 95,000 | 63,000
Independents | Operating Segments | Other Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Independents | Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Supermarkets |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 12,505,000 | 2,820,000 | 2,731,000
Supermarkets | Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 12,505,000 | 2,820,000 | 2,731,000
Adjustment to revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  |  | 36,000 | 16,000
Supermarkets | Operating Segments | Other Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Supermarkets | Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
SUPERVALU |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 1,310,000 | 981,000 | 957,000
SUPERVALU | Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 1,248,000 | 925,000 | 894,000
Other Customer Type |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 21,387,000 | 10,227,000 | 9,274,000
Other Customer Type | Operating Segments | Wholesale Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 21,325,000 | 10,171,000 | 9,211,000
Adjustment to revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  |  | 58,000 | 47,000
Other Customer Type | Operating Segments | Other Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | 228,000 | 228,000 | 232,000
Other Customer Type | Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  |  |  |  |  |  |  | $ (166,000) | $ (172,000) | $ (169,000)

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