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Fair Value Measurements - Other Fair Value Disclosures (Details) - Unsecured notes - USD ($) $ in Millions | Oct. 31, 2025 | Jan. 31, 2025 | Nov. 01, 2024
--- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt carrying value (excluding finance lease obligations) | $ 37,514 | $ 35,011 | $ 34,996
Estimate of fair value | Fair value (Level 1) |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt fair value (excluding finance lease obligations) | $ 34,968 | $ 31,557 | $ 31,651

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