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LONG-TERM DEBT - ABL Credit Facility (Details) - USD ($) | Oct. 30, 2021 | Jul. 31, 2021 | Oct. 19, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Line of credit facility, current borrowing capacity | $ 2,094,000,000 |  |
Notes payable | 2,376,000,000 | $ 2,175,000,000 |
Debt issuance costs, net | 32,000,000 | $ 35,000,000 |
Letter of credit |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, current borrowing capacity | 118,000,000 |  |
Line of credit | Revolving credit facility | ABL Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 2,100,000,000
Line of credit facility, maximum borrowing capacity, optional increase |  |  | $ 600,000,000
Remaining availability under ABL credit facility | 1,066,000,000 |  |
Line of credit | Revolving credit facility | ABL Credit Facility | Accounts receivable |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, borrowing base, eligibility percent |  |  | 90.00%
Line of credit | Revolving credit facility | ABL Credit Facility | Credit card receivable |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, borrowing base, eligibility percent |  |  | 90.00%
Line of credit | Revolving credit facility | ABL Credit Facility | Inventories |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, borrowing base, eligibility percent |  |  | 90.00%
Line of credit | Revolving credit facility | ABL Credit Facility | Pharmacy receivable |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, borrowing base, eligibility percent |  |  | 90.00%
Line of credit | Revolving credit facility | ABL Credit Facility | United States |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity | 2,050,000,000 |  | $ 2,050,000,000
Line of credit facility, borrowing capacity, reserves | 193,000,000 |  |
Line of credit facility, current borrowing capacity | 2,311,000,000 |  |
Notes payable | 910,000,000 |  |
Debt issuance costs, net | 7,000,000 |  |
Letters of credit outstanding, amount | 118,000,000 |  |
Line of credit | Revolving credit facility | ABL Credit Facility | Canada |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity | 50,000,000 |  | 50,000,000
Line of credit facility, borrowing capacity, reserves | 6,000,000 |  |
Line of credit facility, current borrowing capacity | 44,000,000 |  |
Remaining availability under ABL credit facility | 2,094,000,000 |  |
Letters of credit outstanding, amount | $ 0 |  |
Line of credit | Letter of credit | ABL Credit Facility | United States |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  |  | 300,000,000
Line of credit | Letter of credit | ABL Credit Facility | Canada |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 25,000,000

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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399 + Details
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