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v3.20.4

Summary of Significant Accounting Policies (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Jan. 30, 2021 USD ($) segment | Feb. 01, 2020 USD ($) | Feb. 02, 2019 USD ($) | Jun. 15, 2020 store
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Number of Operating Segments | segment | 2 |  |  |
Cash Equivalents, at Carrying Value | $ 3,559,000,000 | $ 1,668,000,000 |  |
Weighted Average Interest Rate on Cash Equivalents | 0.60% | 1.80% |  |
Allowances for uncollectible receivables | $ 38,000,000 | $ 24,000,000 |  |
Write-offs | 88,000,000 | 32,000,000 |  |
Goodwill | $ 986,000,000 | $ 984,000,000 |  |
Percentage of Commissions on Sale of Extended Warranties to Revenue | 2.00% | 2.00% | 2.00% |
Gift card redemption within 1 year, percentage | 90.00% |  |  |
Revenue recognized | $ 923,000,000 | $ 890,000,000 |  |
Period of Expiration for Customer Loyalty Certificates, Low End of Range | 2 months |  |  |
Period of Expiration for Customer Loyalty Certificates, High End of Range | 6 months |  |  |
Advertising expense | $ 819,000,000 | $ 840,000,000 | $ 777,000,000 |
Branded cards | 25.00% | 25.00% | 25.00% |
CARES Act, Qualified Deferred Payroll Taxes | $ 142,000,000 |  |  |
decrease in SG&A expenses | 81,000,000 |  |  |
2021 Notes [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Debt | 650,000,000 |  |  |
2028 Notes [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Debt | 500,000,000 |  |  |
Best Buy Health [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Goodwill | 542,000,000 |  |  |
Best Buy Domestic [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Goodwill | 444,000,000 |  |  |
Best Buy Gift Cards [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Revenue recognized | $ 33,000,000 | $ 35,000,000 | $ 34,000,000 |
Minimum [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Number of Stores | store |  |  |  | 800
Term of contract | 1 month |  |  |
Customer loyalty program, certificate expiration period | 1 month |  |  |
Minimum [Member] | Software [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Estimated useful lives | 2 years |  |  |
Maximum [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Term of contract | 3 years |  |  |
Customer loyalty program, certificate expiration period | 5 years |  |  |
Maximum [Member] | Software [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Estimated useful lives | 5 years |  |  |
Revolving Credit Facility [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 1,250,000,000 |  |  |
Debt instrument, term | 5 years |  |  |

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