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LONG-TERM DEBT - ABL Credit Facility (Details) $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Oct. 22, 2018 USD ($) | Jul. 31, 2021 USD ($) | Aug. 01, 2020 USD ($) | Oct. 19, 2018 USD ($) | Aug. 30, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, based on eligible accounts receivable and inventory levels |  | $ 2,099 |  |  |
Debt issuance costs, net |  | 35 | $ 46 |  |
Letter of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, based on eligible accounts receivable and inventory levels |  | 118 |  |  |
Line of Credit | Credit Facility | ABL Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  |  |  | $ 2,100 |
Maximum borrowing capacity |  |  |  | $ 600 |
Remaining availability of credit facility |  | 1,280 |  |  |
Line of Credit | Credit Facility | ABL Credit Facility | Accounts Receivable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, eligibility percentage |  |  |  | 90.00% |
Line of Credit | Credit Facility | ABL Credit Facility | Credit Card Receivable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, eligibility percentage |  |  |  | 90.00% |
Line of Credit | Credit Facility | ABL Credit Facility | Inventories |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, eligibility percentage |  |  |  | 90.00% |
Line of Credit | Credit Facility | ABL Credit Facility | Pharmacy Receivable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing base, eligibility percentage |  |  |  | 90.00% |
Line of Credit | Credit Facility | ABL Credit Facility | SUPERVALU |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total consideration paid in cash | $ 1,500 |  |  |  |
Line of Credit | Credit Facility | ABL Credit Facility | United States |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  | 2,050 |  | $ 2,050 |
Borrowing base, reserves |  | 175 |  |  |
Borrowing base, based on eligible accounts receivable and inventory levels |  | 2,218 |  |  |
Notes payable |  | 701 |  |  |
Debt issuance costs, net |  | 8 |  |  |
Outstanding letters of credit |  | 118 |  |  |
Line of Credit | Credit Facility | ABL Credit Facility | Canada |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  | 50 |  | 50 |
Borrowing base, reserves |  | 5 |  |  |
Borrowing base, based on eligible accounts receivable and inventory levels | $ 2,099 | 49 |  |  |
Outstanding letters of credit |  | $ 0 |  |  |
Line of Credit | Credit Facility | Former ABL Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  |  |  |  | $ 900
Line of Credit | Letter of Credit | ABL Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Minimum fixed charge coverage ratio |  | 1.0 |  |  |
Maximum aggregate availability of aggregate borrowing base |  | $ 235 |  |  |
Percentage of maximum aggregate availability of the aggregate borrowing base |  | 10.00% |  |  |
Line of Credit | Letter of Credit | ABL Credit Facility | United States |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  |  |  | 300 |
Line of Credit | Letter of Credit | ABL Credit Facility | Canada |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing base |  |  |  | $ 25 |

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