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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Feb. 02, 2020 | Feb. 03, 2019 | Jan. 28, 2018 | Feb. 04, 2019
Accounting Policies [Line Items] |  |  |  |
Fiscal year, period | 53 weeks | 52 weeks | 52 weeks |
Investments classified as cash equivalents, original maturity | 3 months |  |  |
Percentage of merchandise inventories that are calculated using a cost method | 29.00% |  |  |
Self insurance reserve | $ 1,300 | $ 1,300 |  |
Recognized income tax positions are measured at the largest amount exceeding a probability of | 50.00% |  |  |
Quantitative goodwill impairment assessment time interval | 3 years |  |  |
Operating lease, right-of-use asset | $ 5,595 | 0 |  | $ 5,700
Operating lease, liability | $ 5,894 |  |  | 6,000
Impairment of Intangible Assets (Excluding Goodwill) |  | $ 247 |  |
Maximum | Other Intangible Assets |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Intangible asset, useful life | 12 years |  |  |
Software and Software Development Costs | Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Software, useful life | 3 years |  |  |
Software and Software Development Costs | Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Software, useful life | 6 years |  |  |
Accounting standards update 2018-02 | Retained Earnings |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Cumulative effect of accounting changes |  |  |  | 31
Accounting standards update 2018-02 | Accumulated other comprehensive income loss |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Cumulative effect of accounting changes |  |  |  | $ 31

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