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Customer Loyalty Program, Certificate Expiration Period

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Gift card redemption within 1 year, percentage

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Increase (Decrease) In Selling, General, And Administrative Expenses

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Percent Of Total Revenue, Branded Cards

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Percentage of Commissions on Sale of Extended Warranties to Revenue

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Period of Expiration for Customer Loyalty Certificates, High End of Range

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Period of Expiration for Customer Loyalty Certificates, Low End of Range

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This element represents the weighted-average interest rate on cash equivalents.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Face (par) amount of debt instrument at time of issuance.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Represents the number of stores.

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Amount of valuation and qualifying accounts and reserves.

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Amount of decrease in valuation and qualifying accounts and reserves.

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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