Best Buy (BBY) 10-Q 10 Sep 14 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	6 Months Ended
	Aug. 02, 2014	Sep. 03, 2014
Document Information [Line Items]	'	'
Entity Registrant Name	'BEST BUY CO INC	'
Entity Central Index Key	'0000764478	'
Document Type	'10-Q	'
Document Period End Date	2-Aug-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--01-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	349,615,898
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q2	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Aug. 02, 2014	Feb. 01, 2014	Aug. 03, 2013
In Millions, unless otherwise specified
Current assets	'	'	'
Cash and cash equivalents	$2,141	$2,678	$1,910
Short-term investments	939	223	0
Receivables, net	1,005	1,308	1,188
Merchandise inventories	5,583	5,376	5,437
Other current assets	943	900	879
Total current assets	10,611	10,485	9,414
Property and equipment, net	2,532	2,598	2,744
Goodwill	425	425	528
Intangibles, net	100	101	177
Other assets	681	404	421
Total assets	14,349	14,013	13,284
Current liabilities	'	'	'
Accounts payable	5,244	5,122	4,968
Unredeemed gift card liabilities	371	406	358
Deferred revenue	442	399	409
Accrued compensation and related expenses	287	444	343
Accrued liabilities	796	873	776
Accrued income taxes	68	147	130
Current portion of long-term debt	43	45	44
Total current liabilities	7,251	7,436	7,028
Long-term liabilities	976	976	1,017
Long-term debt	1,592	1,612	1,634
Best Buy Co., Inc. shareholders’ equity	'	'	'
Preferred stock, $1.00 par value: Authorized — 400,000 shares; Issued and outstanding — none	0	0	0
Common stock, $0.10 par value: Authorized — 1.0 billion shares; Issued and outstanding — 349,548,000, 346,751,000 and 340,967,000 shares, respectively	35	35	34
Additional paid-in capital	348	300	109
Retained earnings	3,649	3,159	2,930
Accumulated other comprehensive income	494	492	529
Total Best Buy Co., Inc. shareholders’ equity	4,526	3,986	3,602
Noncontrolling interests	4	3	3
Total equity	4,530	3,989	3,605
Total liabilities and equity	$14,349	$14,013	$13,284

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $)	Aug. 02, 2014	Feb. 01, 2014	Aug. 03, 2013
Preferred stock, par value (in dollars per share)	$1	$1	$1
Preferred stock, authorized shares	400,000	400,000	400,000
Preferred stock, issued shares	0	0	0
Preferred stock, outstanding shares	0	0	0
Common stock, par value (in dollars per share)	$0.10	$0.10	$0.10
Common stock, authorized shares	1,000,000,000	1,000,000,000	1,000,000,000
Common stock, issued shares	349,548,000	346,751,000	340,967,000
Common stock, outstanding shares	349,548,000	346,751,000	340,967,000

CONSOLIDATED_STATEMENTS_OF_EAR

CONSOLIDATED STATEMENTS OF EARNINGS (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Revenue	$8,896	$9,266	$17,931	$18,613
Cost of goods sold	6,841	6,808	13,856	13,997
Gross profit	2,055	2,458	4,075	4,616
Selling, general and administrative expenses	1,812	2,038	3,632	4,022
Restructuring charges	5	7	8	13
Operating income	238	413	435	581
Other income (expense)	'	'	'	'
Gain on sale of investments	2	14	2	14
Investment income and other	8	5	14	10
Interest expense	-23	-26	-46	-53
Earnings from continuing operations before income tax (benefit) expense	225	406	405	552
Income tax (benefit) expense	79	169	-202	218
Net earnings from continuing operations	146	237	607	334
Gain (loss) from discontinued operations (Note 2), net of tax benefit (expense) of ($1), $38, ($1) and $24	1	11	1	-159
Net earnings including noncontrolling interests	147	248	608	175
Net earnings from continuing operations attributable to noncontrolling interests	-1	0	-1	0
Net loss from discontinued operations attributable to noncontrolling interests	0	18	0	10
Net earnings attributable to Best Buy Co., Inc. shareholders	$146	$266	$607	$185
Basic earnings (loss) per share attributable to Best Buy Co., Inc. shareholders	'	'	'	'
Continuing operations (in dollars per share)	$0.42	$0.69	$1.74	$0.98
Discontinued operations (in dollars per share)	$0	$0.09	$0	($0.44)
Basic earnings (loss) per share (in dollars per share)	$0.42	$0.78	$1.74	$0.54
Diluted earnings (loss) per share attributable to Best Buy Co., Inc. shareholders	'	'	'	'
Continuing operations (in dollars per share)	$0.42	$0.69	$1.73	$0.97
Discontinued operations (in dollars per share)	$0	$0.08	$0	($0.43)
Diluted earnings (loss) per share (in dollars per share)	$0.42	$0.77	$1.73	$0.54
Dividends declared per common share (in dollars per share)	$0.17	$0.17	$0.34	$0.34
Weighted-average common shares outstanding (in millions)	'	'	'	'
Basic (in shares)	349.3	340.4	348.4	339.7
Diluted (in shares)	352.2	344.4	351.6	343

CONSOLIDATED_STATEMENTS_OF_EAR1

CONSOLIDATED STATEMENTS OF EARNINGS (PARENTHETICAL) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Income tax benefit (expense)	($1)	$38	($1)	$24

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Net earnings including noncontrolling interests	$147	$248	$608	$175
Foreign currency translation adjustments	0	-41	3	-104
Unrealized loss on available-for-sale investments	0	-3	-1	0
Reclassification of foreign currency translation adjustments into earnings due to sale of business	0	654	0	654
Reclassification of losses on available-for-sale investments into earnings	0	2	0	2
Comprehensive income including noncontrolling interests	147	860	610	727
Comprehensive income attributable to noncontrolling interests	-1	-147	-1	-125
Comprehensive income attributable to Best Buy Co., Inc. shareholders	$146	$713	$609	$602

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $)	Total	Total Best Buy Co., Inc. [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
In Millions, unless otherwise specified
Beginning balances at Feb. 02, 2013	$3,715	$3,061	$34	$54	$2,861	$112	$654
Beginning balances (in shares) at Feb. 02, 2013	'	'	338	'	'	'	'
Increase (Decrease) in Shareholders' Equity	'	'	'	'	'	'	'
Net earnings (loss), six months ended	175	185	0	0	185	0	-10
Foreign currency translation adjustments	-104	-93	0	0	0	-93	-11
Unrealized gains (losses) on available-for-sale investments	0	1	0	0	0	1	-1
Sale of noncontrolling interest	-776	0	0	0	0	0	-776
Reclassification of foreign currency translation adjustments into earnings	654	508	0	0	0	508	146
Reclassification of losses on available-for-sale investments into earnings	2	1	0	0	0	1	1
Stock-based compensation	48	48	0	48	0	0	0
Restricted stock vested and stock options exercised (in shares)	'	'	2	'	'	'	'
Restricted stock vested and stock options exercised	14	14	0	14	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)	'	'	1	'	'	'	'
Issuance of common stock under employee stock purchase plan	8	8	0	8	0	0	0
Tax deficit from stock options exercised, restricted stock vesting and employee stock purchase plan	-15	-15	0	-15	0	0	0
Common stock dividends	-116	-116	0	0	-116	0	0
Ending balances at Aug. 03, 2013	3,605	3,602	34	109	2,930	529	3
Ending balances (in shares) at Aug. 03, 2013	'	'	341	'	'	'	'
Beginning balances at May. 04, 2013	'	'	'	'	'	'	'
Increase (Decrease) in Shareholders' Equity	'	'	'	'	'	'	'
Net earnings (loss), six months ended	248	'	'	'	'	'	'
Foreign currency translation adjustments	-41	'	'	'	'	'	'
Unrealized gains (losses) on available-for-sale investments	-3	-2	'	'	'	'	'
Reclassification of foreign currency translation adjustments into earnings	654	508	'	'	'	'	'
Reclassification of losses on available-for-sale investments into earnings	2	1	'	'	'	'	'
Ending balances at Aug. 03, 2013	3,605	3,602	'	'	'	'	'
Beginning balances at Feb. 01, 2014	3,989	3,986	35	300	3,159	492	3
Beginning balances (in shares) at Feb. 01, 2014	'	'	347	'	'	'	'
Increase (Decrease) in Shareholders' Equity	'	'	'	'	'	'	'
Net earnings (loss), six months ended	608	607	0	0	607	0	1
Foreign currency translation adjustments	3	3	0	0	0	3	0
Unrealized gains (losses) on available-for-sale investments	-1	-1	0	0	0	-1	0
Reclassification of foreign currency translation adjustments into earnings	0	'	'	'	'	'	'
Reclassification of losses on available-for-sale investments into earnings	0	'	'	'	'	'	'
Stock-based compensation	41	41	0	41	'	'	'
Restricted stock vested and stock options exercised (in shares)	'	'	2	'	'	'	'
Restricted stock vested and stock options exercised	13	13	0	13	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)	'	'	0	'	'	'	'
Issuance of common stock under employee stock purchase plan	4	4	0	4	0	0	0
Tax deficit from stock options exercised, restricted stock vesting and employee stock purchase plan	-10	-10	0	-10	0	0	0
Common stock dividends	-117	-117	0	0	-117	0	0
Ending balances at Aug. 02, 2014	$4,530	$4,526	$35	$348	$3,649	$494	$4
Ending balances (in shares) at Aug. 02, 2014	'	'	349	'	'	'	'

CONSOLIDATED_STATEMENTS_OF_CHA1

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (PARENTHETICAL) (USD $)	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Statement of Stockholders' Equity [Abstract]	'	'	'	'
Dividends declared per common share (in dollars per share)	$0.17	$0.17	$0.34	$0.34

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS	6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013
	USD ($)	USD ($)
Operating activities	'	'
Net earnings including noncontrolling interests	$608	$175
Adjustments to reconcile net earnings including noncontrolling interests to total cash provided by operating activities:	'	'
Depreciation	319	375
Amortization of definite-lived intangible assets	0	12
Restructuring charges	8	113
(Gain) loss on sale of business, net	-1	123
Stock-based compensation	40	45
Deferred income taxes	-394	-3
Other, net	8	15
Changes in operating assets and liabilities	'	'
Receivables	301	145
Merchandise inventories	-205	569
Other assets	17	-59
Accounts payable	120	-1,114
Other liabilities	-270	-392
Income taxes	-64	15
Total cash provided by operating activities	487	19
Investing activities	'	'
Additions to property and equipment	-258	-301
Purchases of investments	-1,194	-3
Sales of investments	479	36
Proceeds from sale of business, net of cash transferred upon sale	37	67
Change in restricted assets	26	0
Other, net	3	-2
Total cash used in investing activities	-907	-203
Financing activities	'	'
Borrowings of debt	0	2,414
Repayments of debt	-12	-2,021
Dividends paid	-118	-116
Issuance of common stock under employee stock purchase plan and for the exercise of stock options	17	22
Other, net	-1	-7
Total cash provided by (used in) financing activities	-114	292
Effect of exchange rate changes on cash	-3	-24
Increase (decrease) in cash and cash equivalents	-537	84
Cash and cash equivalents at beginning of period	2,678	1,826
Cash and cash equivalents at end of period	$2,141	$1,910

Basis_of_Presentation_Notes

Basis of Presentation (Notes)	6 Months Ended
	Aug. 02, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	Unless the context otherwise requires, the use of the terms “Best Buy,” “we,” “us,” and “our” in these Notes to Condensed Consolidated Financial Statements refers to Best Buy Co., Inc. and its consolidated subsidiaries.
	In the opinion of management, the accompanying condensed consolidated financial statements contain all adjustments necessary for a fair presentation as prescribed by accounting principles generally accepted in the United States (“GAAP”). All adjustments were comprised of normal recurring adjustments, except as noted in these Notes to Condensed Consolidated Financial Statements.
	Description of Business
	Historically, we have generated a higher proportion of our revenue and earnings in the fiscal fourth quarter, which includes the majority of the holiday shopping season in the U.S., Canada and Mexico. Due to the seasonal nature of our business, interim results are not necessarily indicative of results for the entire fiscal year. The interim financial statements and the related notes in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended February 1, 2014. The first six months of fiscal 2015 and fiscal 2014 included 26 weeks.
	In order to align our fiscal reporting periods and comply with statutory filing requirements in certain foreign jurisdictions, we consolidate the financial results of our China and Mexico operations on a one-month lag. Our policy is to accelerate recording the effect of events occurring in the lag period that significantly affect our consolidated financial statements. No such events were identified for this period.
	In preparing the accompanying condensed consolidated financial statements, we evaluated the period from August 3, 2014, through the date the financial statements were issued, for material subsequent events requiring recognition or disclosure. No such events were identified for this period.

Discontinued_Operations

Discontinued Operations	6 Months Ended
	Aug. 02, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Discontinued Operations
	On June 26, 2013, we completed the sale of our 50% ownership interest in Best Buy Europe to Carphone Warehouse Group plc ("CPW") in return for the following consideration upon closing: net cash of £341 million ($526 million); £80 million ($123 million) of ordinary shares of CPW; £25 million ($39 million), plus 2.5% interest, to be paid by CPW on June 26, 2014; and £25 million ($39 million), plus 2.5% interest, to be paid by CPW on June 26, 2015. We subsequently sold the ordinary shares of CPW for $123 million on July 3, 2013, and we received the first such deferred cash payment on June 26, 2014.
	Discontinued operations are comprised of mindSHIFT Technologies, Inc. ("mindSHIFT") operations within our Domestic segment, which we sold in the fourth quarter of fiscal 2014, and Best Buy Europe operations within our International segment, as described above. The presentation of discontinued operations has been retrospectively applied to all prior periods presented.
	The aggregate financial results of all discontinued operations for the three and six months ended August 2, 2014 and August 3, 2013, respectively, were as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Revenue	$	—		$	1,287		$	—		$	2,750
	Restructuring charges(1)	—			47			—			100
	Loss from discontinued operations before income tax benefit	—			(51		)	—			(235		)
	Income tax benefit(2)	—			38			—			24
	Gain on sale of discontinued operations	2			24			2			52
	Income tax expense on sale	(1		)	—			(1		)	—
	Net gain (loss) from discontinued operations, including noncontrolling interests	1			11			1			(159		)
	Net loss from discontinued operations attributable to noncontrolling interests	—			18			—			10
	Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders	$	1		$	29		$	1		$	(149	)
	-1	See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.
	-2	Income tax benefit for the three months ended August 3, 2013 includes a $27 million benefit related to a tax allocation between continuing and discontinued operations. The effective tax rate for discontinued operations for the three and six months ended August 3, 2013 differs from the statutory tax rate primarily due to the previously mentioned tax allocation, restructuring charges and the $175 million impairment of our investment in Best Buy Europe, which generally included no related tax benefit. The deferred tax assets related to the restructuring charges generally resulted in an increase in the valuation allowance in an equal amount, while the investment impairment is not tax deductible.

Fair_Value_Measurements_Notes

Fair Value Measurements (Notes)	6 Months Ended
	Aug. 02, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. To measure fair value, we use a three-tier valuation hierarchy based upon observable and non-observable inputs:
	Level 1 — Unadjusted quoted prices that are available in active markets for the identical assets or liabilities at the measurement date.
	Level 2 — Significant other observable inputs available at the measurement date, other than quoted prices included in Level 1, either directly or indirectly, including:
	•	Quoted prices for similar assets or liabilities in active markets;
	•	Quoted prices for identical or similar assets in non-active markets;
	•	Inputs other than quoted prices that are observable for the asset or liability; and
	•	Inputs that are derived principally from or corroborated by other observable market data.
	Level 3 — Significant unobservable inputs that cannot be corroborated by observable market data and reflect the use of significant management judgment. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	The fair value hierarchy requires the use of observable market data when available. In instances where the inputs used to measure fair value fall into different levels of the fair value hierarchy, the fair value measurement has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular item to the fair value measurement in its entirety requires judgment, including the consideration of inputs specific to the asset or liability.
	The following tables set forth by level within the fair value hierarchy, our financial assets and liabilities that were accounted for at fair value on a recurring basis at August 2, 2014, February 1, 2014, and August 3, 2013, according to the valuation techniques we used to determine their fair values ($ in millions).
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		2-Aug-14		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	211	$	211	$	—	$	—
	Commercial paper	111		—		111		—
	Short-term investments
	Commercial paper	364		—		364		—
	Treasury bills	100		100		—		—
	Other current assets
	Foreign currency derivative instruments	1		—		1		—
	Other assets
	Auction rate securities	9		—		—		9
	Marketable securities that fund deferred compensation	98		98		—		—
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		1-Feb-14		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	53	$	53	$	—	$	—
	Commercial paper	80		—		80		—
	Treasury bills	263		263		—		—
	Short-term investments
	Commercial paper	100		—		100		—
	Other current assets
	Foreign currency derivative instruments	2		—		2		—
	Other assets
	Auction rate securities	9		—		—		9
	Marketable securities that fund deferred compensation	96		96		—		—
	LIABILITIES
	Accrued liabilities
	Foreign currency derivative instruments	5		—		5		—
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		3-Aug-13		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	334	$	334	$	—	$	—
Other current assets
Foreign currency derivative instruments	1		—		1		—
Other assets
Auction rate securities	16		—		—		16
Marketable equity securities	4		4		—		—
Marketable securities that fund deferred compensation	91		91		—		—
There was no change in the beginning and ending balances of items measured at fair value on a recurring basis in the tables above that used significant unobservable inputs (Level 3) for the three and six months ended August 2, 2014. During the three and six months ended August 3, 2013, we sold $5 million of auction rate securities.
The following methods and assumptions were used to estimate the fair value of each class of financial instrument:
Money Market Funds. Our money market fund investments that are traded in an active market were measured at fair value using quoted market prices and, therefore, were classified as Level 1. Our money market fund investments not traded on a regular basis or in an active market, and for which we have been unable to obtain pricing information on an ongoing basis, were measured using inputs other than quoted market prices that are observable for the investments and, therefore, were classified as Level 2.
Commercial Paper. Our investments in commercial paper were measured using inputs based upon quoted prices for similar instruments in active markets and, therefore, were classified as Level 2.
Treasury Bills. Our Treasury bills were classified as Level 1 as they trade with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis.
Foreign Currency Derivative Instruments. Comprised primarily of foreign currency forward contracts and foreign currency swap contracts, our foreign currency derivative instruments were measured at fair value using readily observable market inputs, such as quotations on forward foreign exchange points and foreign interest rates. Our foreign currency derivative instruments were classified as Level 2 as these instruments are custom, over-the-counter contracts with various bank counterparties that are not traded in an active market.
Auction Rate Securities. Our investments in auction rate securities ("ARS") were classified as Level 3 as quoted prices were unavailable. Due to limited market information, we utilized a discounted cash flow ("DCF") model to derive an estimate of fair value. The assumptions we used in preparing the DCF model included estimates with respect to the amount and timing of future interest and principal payments, forward projections of the interest rate benchmarks, the probability of full repayment of the principal considering the credit quality and guarantees in place, and the rate of return required by investors to own such securities given the current liquidity risk associated with ARS.
Marketable Equity Securities. Our marketable equity securities were measured at fair value using quoted market prices. They were classified as Level 1 as they trade in an active market for which closing stock prices are readily available.
Marketable Securities that Fund Deferred Compensation. The assets that fund our deferred compensation consist of investments in mutual funds. These investments were classified as Level 1 as the shares of these mutual funds trade with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis.
Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis
Assets and liabilities that are measured at fair value on a nonrecurring basis relate primarily to our tangible fixed assets, goodwill and other intangible assets, which are remeasured when the derived fair value is below carrying value on our Consolidated Balance Sheets. For these assets, we do not periodically adjust carrying value to fair value except in the event of impairment. When we determine that impairment has occurred, the carrying value of the asset is reduced to fair value and the difference is recorded within operating income in our Consolidated Statements of Earnings.
The following table summarizes the fair value remeasurements for non-restructuring property and equipment impairments and restructuring activities recorded during the six months ended August 2, 2014, and August 3, 2013 ($ in millions):
	Six Months Ended				Six Months Ended
	August 2, 2014				August 3, 2013
	Impairments		Remaining Net Carrying Value(1)		Impairments		Remaining Net Carrying Value(1)
Continuing operations
Property and equipment (non-restructuring)	$	31	$	8	$	19	$	—
Restructuring activities(2)
Property and equipment	—		—		3		—
Total continuing operations	$	31	$	8	$	22	$	—
Discontinued operations(3)
Property and equipment(4)	$	—	$	—	$	220	$	—
Tradename	—		—		4		—
Total discontinued operations	$	—	$	—	$	224	$	—
-1	Remaining net carrying value approximates fair value.
-2	See Note 5, Restructuring Charges, for additional information.
-3	Property and equipment and tradename impairments associated with discontinued operations are recorded within gain (loss) from discontinued operations in our Consolidated Statements of Earnings.
-4	Includes the $175 million impairment to write down the book value of our investment in Best Buy Europe to fair value based on expected net proceeds as described in Note 2, Discontinued Operations. The impairment was calculated based on the fair value and foreign currency translation adjustment associated with the business and was applied to the fixed assets.
All of the fair value remeasurements included in the table above were based on significant unobservable inputs (Level 3). Fixed asset fair values were derived using a DCF model to estimate the present value of net cash flows that the asset or asset group was expected to generate. The key inputs to the DCF model generally included our forecasts of net cash generated from revenue, expenses and other significant cash outflows, such as capital expenditures, as well as an appropriate discount rate. For the tradename, fair value was derived using the relief from royalty method. In the case of assets for which the impairment was the result of restructuring activities, no future cash flows have been assumed as the assets will cease to be used and expected sale values are nominal.
Fair Value of Financial Instruments
Our financial instruments, other than those presented in the disclosures above, include cash, receivables, short-term investments, other investments, accounts payable, other payables, and long-term debt. The fair values of cash, receivables, short-term investments, accounts payable and other payables approximated carrying values because of the short-term nature of these instruments. If these instruments were measured at fair value in the financial statements, they would be classified as Level 1 in the fair value hierarchy. Short-term investments other than those disclosed in the tables above represent time deposits. Fair values for other investments held at cost are not readily available, but we estimate that the carrying values for these investments approximate fair value. See Note 6, Debt, for information about the fair value of our long-term debt.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets (Notes)	6 Months Ended
	Aug. 02, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	The changes in the carrying values of goodwill and indefinite-lived tradenames by segment were as follows in the six months ended August 2, 2014, and August 3, 2013 ($ in millions):
		Goodwill							Indefinite-lived Tradenames
		Domestic		International			Total		Domestic			International			Total
	Balances at February 1, 2014	$	425	$	—		$	425	$	19		$	82		$	101
	Changes in foreign currency exchange rates	—		—			—		—			(1		)	(1		)
	Balances at August 2, 2014	$	425	$	—		$	425	$	19		$	81		$	100
		Goodwill							Indefinite-lived Tradenames
		Domestic		International			Total		Domestic			International			Total
	Balances at February 2, 2013	$	528	$	—		$	528	$	19		$	112		$	131
	Changes in foreign currency exchange rates	—		—			—		—			(2		)	(2		)
	Sale of Best Buy Europe	—		—			—		—			(22		)	(22		)
	Impairments	—		—			—		—			(4		)	(4		)
	Balances at August 3, 2013	$	528	$	—		$	528	$	19		$	84		$	103
	The following table provides the gross carrying amount of goodwill and cumulative goodwill impairment losses ($ in millions):
		August 2, 2014					February 1, 2014					August 3, 2013
		Gross		Cumulative			Gross		Cumulative			Gross			Cumulative
		Carrying		Impairment(1)			Carrying		Impairment(1)			Carrying			Impairment
		Amount(1)					Amount(1)					Amount
	Goodwill	$	1,308	$	(883	)	$	1,308	$	(883	)	$	1,412		$	(884	)
	-1	Excludes the gross carrying amount and cumulative impairment related to mindSHIFT goodwill, which was sold during the fourth quarter of fiscal 2014.

Restructuring_Charges_Notes

Restructuring Charges (Notes)	6 Months Ended
	Aug. 02, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring Charges	'
	Restructuring Charges
	Charges incurred in the six months ended August 2, 2014, and August 3, 2013, for our restructuring activities were as follows ($ in millions):
		Six Months Ended
		August 2, 2014			August 3, 2013
	Continuing operations
	Renew Blue	$	14		$	21
	Fiscal 2013 U.S. restructuring	(6		)	(8		)
	Total continuing operations	8			13
	Discontinued operations
	Fiscal 2013 Europe restructuring	—			95
	Fiscal 2012 restructuring	—			5
	Total discontinued operations (Note 2)	—			100
	Total restructuring charges	$	8		$	113
	Renew Blue
	In the fourth quarter of fiscal 2013, we began implementing initiatives intended to reduce costs and improve operating performance. These initiatives included focusing on core business activities, reducing headcount, updating our store operating model and optimizing our real estate portfolio. These cost reduction initiatives represented one of the key Renew Blue priorities for fiscal 2014 and cost reduction continues to be a priority in fiscal 2015. We incurred $14 million and $21 million of restructuring charges related to Renew Blue initiatives during the first six months of fiscal 2015 and 2014, respectively. The charges in the first six months of fiscal 2015 were primarily due to employee termination benefits. The charges in the first six months of fiscal 2014 were primarily comprised of employee termination benefits, facility closure costs, and property and equipment impairments. We expect to continue to implement cost reduction initiatives throughout fiscal 2015, as we further analyze our operations and strategies.
	All restructuring charges related to this program are from continuing operations and are presented in restructuring charges in our Consolidated Statements of Earnings. The composition of the restructuring charges we incurred for this program in the six months ended August 2, 2014, and August 3, 2013, as well as the cumulative amount incurred through August 2, 2014, was as follows ($ in millions):
		Domestic									International						Total
		Six Months Ended						Cumulative			Six Months Ended				Cumulative		Six Months Ended				Cumulative
		August 2,			August 3,			Amount			August 2,		August 3,		Amount		August 2,		August 3,		Amount
		2014			2013						2014		2013				2014		2013
	Continuing operations
	Inventory write-downs	$	—		$	—		$	1		$	—	$	—	$	—	$	—	$	—	$	1
	Property and equipment impairments	—			2			14			1		1		26		1		3		40
	Termination benefits	7			8			159			5		6		42		12		14		201
	Investment impairments	—			—			43			—		—		—		—		—		43
	Facility closure and other costs	—			—			3			1		4		62		1		4		65
	Total	$	7		$	10		$	220		$	7	$	11	$	130	$	14	$	21	$	350
	The following tables summarize our restructuring accrual activity during the six months ended August 2, 2014, and August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 1, 2014	$	111		$	51		$	162
	Charges	28			7			35
	Cash payments	(106		)	(9		)	(115		)
	Adjustments(1)	(16		)	(4		)	(20		)
	Changes in foreign currency exchange rates	—			(5		)	(5		)
	Balances at August 2, 2014	$	17		$	40		$	57
	-1	Adjustments to termination benefits were due to higher-than-expected employee retention. Adjustments to facility closure and other costs represent changes in sublease assumptions and reductions in our remaining lease obligations.
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 2, 2013	$	54		$	54		$	108
	Charges	15			9			24
	Cash payments	(53		)	(11		)	(64		)
	Adjustments	(5		)	8			3
	Changes in foreign currency exchange rates	—			(3		)	(3		)
	Balances at August 3, 2013	$	11		$	57		$	68
	Fiscal 2013 U.S. Restructuring
	In the first quarter of fiscal 2013, we initiated a series of actions to restructure operations in our Domestic segment intended to improve operating performance. The actions included closure of 49 large-format Best Buy branded stores in the U.S. and changes to the store and corporate operating models. The costs of implementing the changes were primarily comprised of facility closure costs, employee termination benefits, and property and equipment (primarily store fixtures) impairments. We recognized a reduction to restructuring charges of $6 million and $8 million in the six months ended August 2, 2014, and August 3, 2013, as a result of changes in sublease assumptions and the buyout of a lease for less than the remaining vacant space liability. We have completed activities under this restructuring program and do not expect to incur further material restructuring charges, with the exception of potential additional adjustments to facility closure and other costs. In addition, lease payments for vacated stores will continue until leases expire or are terminated.
	The restructuring charges related to this program are from continuing operations and are presented in restructuring charges in our Consolidated Statements of Earnings. The composition of the restructuring charges we incurred for this program in the six months ended August 2, 2014 and August 3, 2013, as well as the cumulative amount incurred through August 2, 2014, was as follows ($ in millions):
		Six Months Ended						Cumulative Amount
		August 2, 2014			3-Aug-13
	Continuing operations
	Property and equipment impairments	$	—		$	—		$	29
	Termination benefits	—			—			77
	Facility closure and other costs	(6		)	(8		)	139
	Total	$	(6	)	$	(8	)	$	245
	The following tables summarize our restructuring accrual activity during the six months ended August 2, 2014, and August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
		Facility
		Closure and
		Other Costs
	Balances at February 1, 2014	$	58
	Charges	1
Cash payments	(11		)
Adjustments	(6		)
Balances at August 2, 2014	$	42
	Termination			Facility			Total
	Benefits			Closure and
				Other Costs
Balances at February 2, 2013	$	4		$	113		$	117
Charges	—			3			3
Cash payments	(2		)	(31		)	(33		)
Adjustments(1)	(2		)	(13		)	(15		)
Balances at August 3, 2013	$	—		$	72		$	72
-1	Adjustments to facility closure and other costs represent reductions in our remaining lease obligations.
Fiscal 2013 Europe Restructuring
In the third quarter of fiscal 2013, we initiated a series of actions to restructure our Best Buy Europe operations in our International segment intended to improve operating performance. As described in Note 2, Discontinued Operations, we completed the sale of our 50% ownership interest in Best Buy Europe on June 26, 2013. This program ended as of the date of sale, at which time we wrote off all remaining restructuring liabilities. The cumulative amount of charges we incurred under this program was $131 million, which included $95 million in the first six months of fiscal 2014, primarily related to property and equipment impairments and termination benefits. All restructuring charges related to this program are reported within gain (loss) from discontinued operations in our Consolidated Statements of Earnings.
The following table summarizes our restructuring accrual activity during the six months ended August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
	Termination			Facility			Total
	Benefits			Closure and
				Other Costs
Balances at February 2, 2013	$	—		$	5		$	5
Charges	36			2			38
Cash payments	(2		)	(7		)	(9		)
Adjustments(1)	(34		)	—			(34		)
Balances at August 3, 2013	$	—		$	—		$	—
-1	Represents the remaining liability written off as a result of the sale of Best Buy Europe, as described in Note 2, Discontinued Operations.
Fiscal 2012 Restructuring
In the third quarter of fiscal 2012, we implemented a series of actions to restructure operations in our Domestic and International segments. The actions within our Domestic segment included a decision to modify our strategy for certain mobile broadband offerings. In our International segment, we closed our large-format Best Buy branded stores in the U.K. and impaired certain information technology assets supporting the restructured operations. The cumulative amount of charges we incurred under this program was $246 million, comprised of $22 million within our Domestic segment and $224 million within our International segment, primarily related to property and equipment impairments and facility closure and other costs. We incurred $5 million of charges related to this program in the first six months of fiscal 2014, representing a change in sublease assumptions. We did not incur any charges related to this program in the first six months of fiscal 2015 and do not expect to incur further material restructuring charges related to this program, as we have completed these restructuring activities.
The following table summarizes our restructuring accrual activity during the six months ended August 3, 2013, related to facility closure and other costs associated with this program ($ in millions):
	Facility
	Closure and
	Other Costs
Balances at February 2, 2013	$	36
Cash payments	(33		)
Adjustments(1)	(1		)
Changes in foreign currency exchange rates	(2		)
Balances at August 3, 2013	$	—
-1	Included within Adjustments is a $5 million charge related to a change in sublease assumptions, offset by a $6 million adjustment to write off the remaining liability as a result of the sale of Best Buy Europe, as described in Note 2, Discontinued Operations.

Debt_Notes

Debt (Notes)	6 Months Ended
	Aug. 02, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	U.S. Revolving Credit Facilities
	Our $500 million 364-day senior unsecured revolving credit facility agreement with a syndicate of banks, which was entered into on June 25, 2013, expired on June 25, 2014.
	On June 30, 2014, we entered into a $1.25 billion five-year senior unsecured revolving credit facility agreement (the "Five-Year Facility Agreement") with a syndicate of banks. The Five-Year Facility Agreement replaced the previous $1.5 billion senior unsecured revolving credit facility with a syndicate of banks, which was originally scheduled to expire in October 2016, but was terminated on June 30, 2014.
	The interest rate under the Five-Year Facility Agreement is variable and is determined at our option as: (i) the sum of (a) the greatest of (1) JPMorgan's prime rate, (2) the federal funds rate plus 0.5%, and (3) the one-month London Interbank Offered Rate (“LIBOR”) plus 1.0%, and (b) a variable margin rate (the “ABR Margin”); or (ii) the LIBOR plus a variable margin rate (the “LIBOR Margin”). In addition, a facility fee is assessed on the commitment amount. The ABR Margin, LIBOR Margin and the facility fee are based upon the registrant’s current senior unsecured debt rating. Under the Five-Year Facility Agreement, the ABR Margin ranges from 0.0% to 0.925%, the LIBOR Margin ranges from 1.000% to 1.925%, and the facility fee ranges from 0.125% to 0.325%.
	Long-Term Debt
	Long-term debt consisted of the following ($ in millions):
		August 2, 2014			February 1, 2014			August 3, 2013
	2016 Notes	$	350		$	349		$	349
	2018 Notes	500			500			500
	2021 Notes	649			649			648
	Financing lease obligations	83			95			109
	Capital lease obligations	52			63			71
	Other debt	1			1			1
	Total long-term debt	1,635			1,657			1,678
	Less: current portion	(43		)	(45		)	(44		)
	Total long-term debt, less current portion	$	1,592		$	1,612		$	1,634
	The fair value of long-term debt approximated $1,670 million, $1,690 million, and $1,673 million at August 2, 2014, February 1, 2014, and August 3, 2013, respectively, based primarily on the market prices quoted from external sources, compared with carrying values of $1,635 million, $1,657 million, and $1,678 million, respectively. If long-term debt was measured at fair value in the financial statements, it would be classified primarily as Level 1 in the fair value hierarchy.
	See Note 7, Debt, in the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended February 1, 2014, for additional information regarding the terms of our debt facilities, debt instruments and other obligations.

Derivative_Instruments_Notes

Derivative Instruments (Notes)	6 Months Ended
	Aug. 02, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Derivative Instruments
	We use foreign currency forward contracts to manage the impact of fluctuations in foreign currency exchange rates relative to recognized receivable and payable balances denominated in non-functional currencies, and on certain forecast inventory purchases denominated in non-functional currencies. The contracts generally have terms of up to 12 months. These derivative instruments are not designated in hedging relationships and, therefore, we record gains and losses on these contracts directly to net earnings. At August 2, 2014, February 1, 2014, and August 3, 2013, the notional amount of these instruments was $95 million, $157 million, and $123 million, respectively. We recognized losses of $1 million and $4 million in selling, general and administrative expenses in our Consolidated Statements of Earnings during the three and six months ended August 2, 2014, respectively, related to these instruments. For the three and six months ended August 3, 2013, we recognized gains of $5 million and $6 million, respectively, in selling, general and administrative expenses.
	In conjunction with our agreement to sell our 50% ownership interest in Best Buy Europe as described in Note 2, Discontinued Operations, we entered into a deal-contingent foreign currency forward contract to hedge £455 million of the total £471 million of net proceeds. The contract was settled in cash following the completion of the sale on June 26, 2013. The effect of this instrument on our Consolidated Statements of Earnings for the three and six months ended August 3, 2013, was a $3 million gain and a $2 million loss, respectively, recognized in gain (loss) from discontinued operations.

Earnings_per_Share_Notes

Earnings per Share (Notes)	6 Months Ended
	Aug. 02, 2014
Earnings Per Share [Abstract]	'
Earnings per Share	'
	Earnings per Share
	We compute our basic earnings per share based on the weighted-average number of common shares outstanding and our diluted earnings per share based on the weighted-average number of common shares outstanding adjusted by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued. Potentially dilutive securities include stock options, nonvested share awards and shares issuable under our employee stock purchase plan. Nonvested market-based share awards and nonvested performance-based share awards are included in the average diluted shares outstanding for each period if established market or performance criteria have been met at the end of the respective periods.
	The following table presents a reconciliation of the numerators and denominators of basic and diluted earnings per share from continuing operations attributable to Best Buy Co., Inc. ($ and shares in millions):
		Three Months Ended					Six Months Ended
		August 2, 2014			August 3, 2013		August 2, 2014			August 3, 2013
	Numerator
	Net earnings from continuing operations	$	146		$	237	$	607		$	334
	Net earnings from continuing operations attributable to noncontrolling interests	(1		)	—		(1		)	—
	Net earnings from continuing operations attributable to Best Buy Co., Inc.	$	145		$	237	$	606		$	334
	Denominator
	Weighted-average common shares outstanding	349.3			340.4		348.4			339.7
	Effect of potentially dilutive securities:
	Nonvested share awards	2.9			4		3.2			3.3
	Weighted-average common shares outstanding, assuming dilution	352.2			344.4		351.6			343
	Net earnings per share from continuing operations attributable to Best Buy Co., Inc.
	Basic	$	0.42		$	0.69	$	1.74		$	0.98
	Diluted	$	0.42		$	0.69	$	1.73		$	0.97
	The computation of weighted-average common shares outstanding, assuming dilution, excluded options to purchase 13.5 million and 19.2 million shares of our common stock for the three months ended August 2, 2014, and August 3, 2013, respectively, and options to purchase 13.5 million and 21.7 million shares of our common stock for the six months ended August 2, 2014, and August 3, 2013, respectively. These amounts were excluded as the options’ exercise prices were greater than the average market price of our common stock for the periods presented and, therefore, the effect would be anti-dilutive (i.e., including such options would result in higher earnings per share).

Comprehensive_Income_Notes

Comprehensive Income (Notes)	6 Months Ended
	Aug. 02, 2014
Equity [Abstract]	'
Comprehensive Income	'
	Comprehensive Income
	The following tables provide a reconciliation of the components of accumulated other comprehensive income, net of tax, attributable to Best Buy Co., Inc. for the six months ended August 2, 2014, and the three and six months ended August 3, 2013, respectively ($ in millions). There was no change in the components of accumulated other comprehensive income for the three months ended August 2, 2014.
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at February 1, 2014	$	485		$	7		$	492
	Foreign currency translation adjustments	3			—			3
	Unrealized losses on available-for-sale investments	—			(1		)	(1		)
	Balances at August 2, 2014	$	488		$	6		$	494
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at May 4, 2013	$	80		$	2		$	82
	Foreign currency translation adjustments	(60		)	—			(60		)
	Reclassification of foreign currency translation adjustments into earnings due to sale of business	508			—			508
	Unrealized losses on available-for-sale investments	—			(2		)	(2		)
	Reclassification of losses on available-for-sale investments into earnings	—			1			1
	Balances at August 3, 2013	$	528		$	1		$	529
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at February 2, 2013	$	113		$	(1	)	$	112
	Foreign currency translation adjustments	(93		)	—			(93		)
	Reclassification of foreign currency translation adjustments into earnings due to sale of business	508			—			508
	Unrealized gains on available-for-sale investments	—			1			1
	Reclassification of losses on available-for-sale investments into earnings	—			1			1
	Balances at August 3, 2013	$	528		$	1		$	529
	There is generally no tax impact related to foreign currency translation adjustments, as the earnings are considered permanently reinvested. In addition, there were no material tax impacts related to gains or losses on available-for-sale investments in the periods presented.

Income_Taxes_Notes

Income Taxes (Notes)	6 Months Ended
	Aug. 02, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'
Income Tax Disclosure [Text Block]	'
	Income Taxes
	As disclosed in Note 3, Profit Share Buy-Out, in the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended February 1, 2014, in the fourth quarter of fiscal 2012, we purchased CPW’s interest in the Best Buy Mobile profit share agreement for $1.3 billion (the “Mobile buy-out”). The Mobile buy-out completed by our U.K. subsidiary resulted in the $1.3 billion purchase price being assigned, for U.S. tax purposes only, to an intangible asset. The Mobile buy-out did not, however, result in a similar intangible asset in the U.K., as the Mobile buy-out was considered part of a tax-free equity transaction for U.K. tax purposes.
	Because the U.S. tax basis in the intangible asset was considered under U.S. tax law to be held by our U.K. subsidiary, which is regarded as a foreign corporation for U.S. tax purposes, ASC 740, Income Taxes, requires that no deferred tax asset may be recorded in respect of the intangible asset. ASC 740-30-25-9 also precludes the recording of a deferred tax asset on the outside basis difference of the U.K. subsidiary. As a result, the amortization of the U.S. tax basis in the intangible asset only resulted in a periodic income tax benefit by reducing the amount of the U.K. subsidiary’s income, if any, that would otherwise have been subject to U.S. income taxes.
	In the first quarter of fiscal 2015, we filed an election with the Internal Revenue Service to treat the U.K. subsidiary as a disregarded entity such that its assets are now deemed to be assets held directly by a U.S. entity for U.S. tax purposes. This tax-only election, which results in the liquidation of the U.K. subsidiary for U.S. tax purposes, resulted in the elimination of the Company’s outside basis difference in the U.K. subsidiary. Additionally, the election resulted in the recognition of a deferred tax asset (and corresponding income tax benefit) for the remaining unrecognized inside tax basis in the intangible, in a manner similar to a change in tax status as provided in ASC 740-10-25-32.
	Our effective tax rate for the first six months of fiscal 2015 was (50.0)%, compared to 39.4% in the prior year period. Without the impact of the election described above, which contributed to an income tax benefit of $353 million, the effective tax rate for the first six months of fiscal 2015 would have been 37.2%. The 37.2% effective tax rate was lower than the prior year primarily due to the favorable resolution of certain tax matters in the current year period, partially offset by the unfavorable ongoing periodic impact as a result of the election described above.

Segments_Notes

Segments (Notes)	6 Months Ended
	Aug. 02, 2014
Segment Reporting [Abstract]	'
Segments	'
	Segments
	Our chief operating decision maker ("CODM") is our Chief Executive Officer. Our business is organized into two segments: Domestic (which is comprised of all operations within the U.S. and its territories) and International (which is comprised of all operations outside the U.S. and its territories). Our CODM has ultimate responsibility for enterprise decisions. Our CODM determines, in particular, resource allocation for, and monitors performance of, the consolidated enterprise, the Domestic segment and the International segment. The Domestic and International segment managers have responsibility for operating decisions, allocating resources and assessing performance within their respective segments. Our CODM relies on internal management reporting that analyzes enterprise results to the net earnings level and segment results to the operating income level.
	We do not aggregate our operating segments, so our operating segments also represent our reportable segments. The accounting policies of the segments are the same as those described in Note 1, Summary of Significant Accounting Policies, in the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended February 1, 2014.
	Revenue by reportable segment was as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Domestic	$	7,585		$	7,775		$	15,366		$	15,721
	International	1,311			1,491			2,565			2,892
	Total revenue	$	8,896		$	9,266		$	17,931		$	18,613
	Operating income (loss) by reportable segment and the reconciliation to earnings from continuing operations before income tax (benefit) expense were as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Domestic	$	258		$	420		$	484		$	642
	International	(20		)	(7		)	(49		)	(61		)
	Total operating income	238			413			435			581
	Other income (expense)
	Gain on sale of investments	2			14			2			14
	Investment income and other	8			5			14			10
	Interest expense	(23		)	(26		)	(46		)	(53		)
	Earnings from continuing operations before income tax (benefit) expense	$	225		$	406		$	405		$	552
	Assets by reportable segment were as follows ($ in millions):
		August 2, 2014			February 1, 2014			August 3, 2013
	Domestic	$	11,847		$	11,146		$	10,606
	International	2,502			2,867			2,678
	Total assets	$	14,349		$	14,013		$	13,284

Contingencies_Notes

Contingencies (Notes)	6 Months Ended
	Aug. 02, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Contingencies	'
	Contingencies
	We are involved in a number of legal proceedings. Where appropriate, we have made accruals with respect to these matters, which are reflected in our consolidated financial statements. However, there are cases where liability is not probable or the amount cannot be reasonably estimated and therefore accruals have not been made. We provide disclosure of matters where we believe it is reasonably possible the impact may be material to our consolidated financial statements.
	Securities Actions
	In February 2011, a purported class action lawsuit captioned, IBEW Local 98 Pension Fund, individually and on behalf of all others similarly situated v. Best Buy Co., Inc., et al., was filed against us and certain of our executive officers in the U.S. District Court for the District of Minnesota. This federal court action alleges, among other things, that we and the officers named in the complaint violated Sections 10(b) and 20A of the Exchange Act and Rule 10b-5 under the Exchange Act in connection with press releases and other statements relating to our fiscal 2011 earnings guidance that had been made available to the public. Additionally, in March 2011, a similar purported class action was filed by a single shareholder, Rene LeBlanc, against us and certain of our executive officers in the same court. In July 2011, after consolidation of the IBEW Local 98 Pension Fund and Rene LeBlanc actions, a consolidated complaint captioned, IBEW Local 98 Pension Fund v. Best Buy Co., Inc., et al., was filed and served. We filed a motion to dismiss the consolidated complaint in September 2011, and in March 2012, subsequent to the end of fiscal 2012, the court issued a decision dismissing the action with prejudice. In April 2012, the plaintiffs filed a motion to alter or amend the court's decision on our motion to dismiss. In October 2012, the court granted plaintiff's motion to alter or amend the court's decision on our motion to dismiss in part by vacating such decision and giving plaintiff leave to file an amended complaint, which plaintiff did in October 2012. We filed a motion to dismiss the amended complaint in November 2012 and all responsive pleadings were filed in December 2012. A hearing was held on April 26, 2013. On August 5, 2013, the court issued an order granting our motion to dismiss in part and, contrary to its March 2012 order, denying the motion to dismiss in part, holding that certain of the statements alleged to have been made were not forward-looking statements and therefore were not subject to the “safe-harbor” provisions of the Private Securities Litigation Reform Act (PSLRA). Plaintiffs moved to certify the purported class. By Order filed August 6, 2014, the court certified a class of persons or entities who acquired Best Buy common stock between 10:00 a.m. EDT on September 14, 2010, and December 13, 2010, and who were damaged by the alleged violations of law. We have filed an interlocutory appeal of this Order with the 8th Circuit Court of Appeals and a decision on that appeal is pending. We continue to believe that these allegations are without merit and intend to vigorously defend our company in this matter.
	In June 2011, a purported shareholder derivative action captioned, Salvatore M. Talluto, Derivatively and on Behalf of Best Buy Co., Inc. v. Richard M. Schulze, et al., as Defendants and Best Buy Co., Inc. as Nominal Defendant, was filed against both present and former members of our Board of Directors serving during the relevant periods in fiscal 2011 and us as a nominal defendant in the U.S. District Court for the State of Minnesota. The lawsuit alleges that the director defendants breached their fiduciary duty, among other claims, including violation of Section 10(b) of the Exchange Act and Rule 10b-5 thereunder, in failing to correct public misrepresentations and material misstatements and/or omissions regarding our fiscal 2011 earnings projections and, for certain directors, selling stock while in possession of material adverse non-public information. Additionally, in July 2011, a similar purported class action was filed by a single shareholder, Daniel Himmel, against us and certain of our executive officers in the same court. In November 2011, the respective lawsuits of Salvatore M. Talluto and Daniel Himmel were consolidated into a new action captioned, In Re: Best Buy Co., Inc. Shareholder Derivative Litigation, and a stay ordered pending the close of discovery in the consolidated IBEW Local 98 Pension Fund v. Best Buy Co., Inc., et al. case.
	The plaintiffs in the above securities actions seek damages, including interest, equitable relief and reimbursement of the costs and expenses they incurred in the lawsuits. As stated above, we believe the allegations in the above securities actions are without merit, and we intend to defend these actions vigorously. Based on our assessment of the facts underlying the claims in the above securities actions, their respective procedural litigation history, and the degree to which we intend to defend our company in these matters, the amount or range of reasonably possible losses, if any, cannot be estimated.
	Trade Secrets Action
	In February 2011, a lawsuit captioned Techforward, Inc. v. Best Buy Co., Inc., et. al. was filed against us in the U.S. District Court, Central District of California. The case alleged that we implemented our “Buy Back Plan” in February 2011 using trade secrets misappropriated from plaintiff's buyback plan that were disclosed to us during business relationship discussions and also breached both an agreement for a limited marketing test of plaintiff's buyback plan and a non-disclosure agreement related to the business discussions. In November 2012, a jury found we were unjustly enriched through misappropriation of trade secrets and awarded plaintiff $22 million. The jury also found that although we breached the subject contracts, plaintiff suffered no resulting damage. In December 2012, the court further awarded the plaintiff $5 million in exemplary damages and granted plaintiff's motion for $6 million in attorney fees and costs. We believe that the jury verdict and court awards are inconsistent with the law and the evidence offered at trial or otherwise in error. Accordingly, we appealed the resulting judgment and awards in February 2013. In August 2014, we entered into a confidential settlement agreement with the plaintiff in respect to this matter. The settlement did not have a material impact on our financial position or results of operations.
	Other Legal Proceedings
	We are involved in various other legal proceedings arising in the normal course of conducting business. For such legal proceedings, we have accrued an amount that reflects the aggregate liability deemed probable and estimable, but this amount is not material to our consolidated financial position, results of operations or cash flows. Because of the preliminary nature of many of these proceedings, the difficulty in ascertaining the applicable facts relating to many of these proceedings, the variable treatment of claims made in many of these proceedings and the difficulty of predicting the settlement value of many of these proceedings, we are not able to estimate an amount or range of any reasonably possible additional losses. However, based upon our historical experience, the resolution of these proceedings is not expected to have a material effect on our consolidated financial position, results of operations or cash flows.

Discontinued_Operations_Discon

Discontinued Operations Discontinued Operations (Tables)	6 Months Ended
	Aug. 02, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	'
	The aggregate financial results of all discontinued operations for the three and six months ended August 2, 2014 and August 3, 2013, respectively, were as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Revenue	$	—		$	1,287		$	—		$	2,750
	Restructuring charges(1)	—			47			—			100
	Loss from discontinued operations before income tax benefit	—			(51		)	—			(235		)
	Income tax benefit(2)	—			38			—			24
	Gain on sale of discontinued operations	2			24			2			52
	Income tax expense on sale	(1		)	—			(1		)	—
	Net gain (loss) from discontinued operations, including noncontrolling interests	1			11			1			(159		)
	Net loss from discontinued operations attributable to noncontrolling interests	—			18			—			10
	Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders	$	1		$	29		$	1		$	(149	)
	-1	See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.
	-2	Income tax benefit for the three months ended August 3, 2013 includes a $27 million benefit related to a tax allocation between continuing and discontinued operations. The effective tax rate for discontinued operations for the three and six months ended August 3, 2013 differs from the statutory tax rate primarily due to the previously mentioned tax allocation, restructuring charges and the $175 million impairment of our investment in Best Buy Europe, which generally included no related tax benefit. The deferred tax assets related to the restructuring charges generally resulted in an increase in the valuation allowance in an equal amount, while the investment impairment is not tax deductible.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Aug. 02, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	The following tables set forth by level within the fair value hierarchy, our financial assets and liabilities that were accounted for at fair value on a recurring basis at August 2, 2014, February 1, 2014, and August 3, 2013, according to the valuation techniques we used to determine their fair values ($ in millions).
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		2-Aug-14		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	211	$	211	$	—	$	—
	Commercial paper	111		—		111		—
	Short-term investments
	Commercial paper	364		—		364		—
	Treasury bills	100		100		—		—
	Other current assets
	Foreign currency derivative instruments	1		—		1		—
	Other assets
	Auction rate securities	9		—		—		9
	Marketable securities that fund deferred compensation	98		98		—		—
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		1-Feb-14		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	53	$	53	$	—	$	—
	Commercial paper	80		—		80		—
	Treasury bills	263		263		—		—
	Short-term investments
	Commercial paper	100		—		100		—
	Other current assets
	Foreign currency derivative instruments	2		—		2		—
	Other assets
	Auction rate securities	9		—		—		9
	Marketable securities that fund deferred compensation	96		96		—		—
	LIABILITIES
	Accrued liabilities
	Foreign currency derivative instruments	5		—		5		—
				Fair Value Measurements
				Using Inputs Considered as
		Fair Value at		Quoted Prices		Significant		Significant
		3-Aug-13		in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	ASSETS
	Cash and cash equivalents
	Money market funds	$	334	$	334	$	—	$	—
	Other current assets
	Foreign currency derivative instruments	1		—		1		—
	Other assets
	Auction rate securities	16		—		—		16
	Marketable equity securities	4		4		—		—
	Marketable securities that fund deferred compensation	91		91		—		—
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	'
	The following table summarizes the fair value remeasurements for non-restructuring property and equipment impairments and restructuring activities recorded during the six months ended August 2, 2014, and August 3, 2013 ($ in millions):
		Six Months Ended				Six Months Ended
		August 2, 2014				August 3, 2013
		Impairments		Remaining Net Carrying Value(1)		Impairments		Remaining Net Carrying Value(1)
	Continuing operations
	Property and equipment (non-restructuring)	$	31	$	8	$	19	$	—
	Restructuring activities(2)
	Property and equipment	—		—		3		—
	Total continuing operations	$	31	$	8	$	22	$	—
	Discontinued operations(3)
	Property and equipment(4)	$	—	$	—	$	220	$	—
	Tradename	—		—		4		—
	Total discontinued operations	$	—	$	—	$	224	$	—
	-1	Remaining net carrying value approximates fair value.
	-2	See Note 5, Restructuring Charges, for additional information.
	-3	Property and equipment and tradename impairments associated with discontinued operations are recorded within gain (loss) from discontinued operations in our Consolidated Statements of Earnings.
	-4	Includes the $175 million impairment to write down the book value of our investment in Best Buy Europe to fair value based on expected net proceeds as described in Note 2, Discontinued Operations. The impairment was calculated based on the fair value and foreign currency translation adjustment associated with the business and was applied to the fixed assets.

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Aug. 02, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Intangible Assets and Goodwill, by Segment	'
	The changes in the carrying values of goodwill and indefinite-lived tradenames by segment were as follows in the six months ended August 2, 2014, and August 3, 2013 ($ in millions):
		Goodwill							Indefinite-lived Tradenames
		Domestic		International			Total		Domestic			International			Total
	Balances at February 1, 2014	$	425	$	—		$	425	$	19		$	82		$	101
	Changes in foreign currency exchange rates	—		—			—		—			(1		)	(1		)
	Balances at August 2, 2014	$	425	$	—		$	425	$	19		$	81		$	100
		Goodwill							Indefinite-lived Tradenames
		Domestic		International			Total		Domestic			International			Total
	Balances at February 2, 2013	$	528	$	—		$	528	$	19		$	112		$	131
	Changes in foreign currency exchange rates	—		—			—		—			(2		)	(2		)
	Sale of Best Buy Europe	—		—			—		—			(22		)	(22		)
	Impairments	—		—			—		—			(4		)	(4		)
	Balances at August 3, 2013	$	528	$	—		$	528	$	19		$	84		$	103
Schedule of Gross Amount of Goodwill and Accumulated Goodwill Impairment Losses	'
	The following table provides the gross carrying amount of goodwill and cumulative goodwill impairment losses ($ in millions):
		August 2, 2014					February 1, 2014					August 3, 2013
		Gross		Cumulative			Gross		Cumulative			Gross			Cumulative
		Carrying		Impairment(1)			Carrying		Impairment(1)			Carrying			Impairment
		Amount(1)					Amount(1)					Amount
	Goodwill	$	1,308	$	(883	)	$	1,308	$	(883	)	$	1,412		$	(884	)
	-1	Excludes the gross carrying amount and cumulative impairment related to mindSHIFT goodwill, which was sold during the fourth quarter of fiscal 2014.

Restructuring_Charges_Tables

Restructuring Charges (Tables)	6 Months Ended
	Aug. 02, 2014
Restructuring Cost and Reserve [Line Items]	'
Composition of Restructuring Charges	'
	Charges incurred in the six months ended August 2, 2014, and August 3, 2013, for our restructuring activities were as follows ($ in millions):
		Six Months Ended
		August 2, 2014			August 3, 2013
	Continuing operations
	Renew Blue	$	14		$	21
	Fiscal 2013 U.S. restructuring	(6		)	(8		)
	Total continuing operations	8			13
	Discontinued operations
	Fiscal 2013 Europe restructuring	—			95
	Fiscal 2012 restructuring	—			5
	Total discontinued operations (Note 2)	—			100
	Total restructuring charges	$	8		$	113
Restructuring Program 2013 Renew Blue [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Composition of Restructuring Charges	'
	The composition of the restructuring charges we incurred for this program in the six months ended August 2, 2014, and August 3, 2013, as well as the cumulative amount incurred through August 2, 2014, was as follows ($ in millions):
		Domestic									International						Total
		Six Months Ended						Cumulative			Six Months Ended				Cumulative		Six Months Ended				Cumulative
		August 2,			August 3,			Amount			August 2,		August 3,		Amount		August 2,		August 3,		Amount
		2014			2013						2014		2013				2014		2013
	Continuing operations
	Inventory write-downs	$	—		$	—		$	1		$	—	$	—	$	—	$	—	$	—	$	1
	Property and equipment impairments	—			2			14			1		1		26		1		3		40
	Termination benefits	7			8			159			5		6		42		12		14		201
	Investment impairments	—			—			43			—		—		—		—		—		43
	Facility closure and other costs	—			—			3			1		4		62		1		4		65
	Total	$	7		$	10		$	220		$	7	$	11	$	130	$	14	$	21	$	350
Restructuring Accrual Activity	'
	The following tables summarize our restructuring accrual activity during the six months ended August 2, 2014, and August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 1, 2014	$	111		$	51		$	162
	Charges	28			7			35
	Cash payments	(106		)	(9		)	(115		)
	Adjustments(1)	(16		)	(4		)	(20		)
	Changes in foreign currency exchange rates	—			(5		)	(5		)
	Balances at August 2, 2014	$	17		$	40		$	57
	-1	Adjustments to termination benefits were due to higher-than-expected employee retention. Adjustments to facility closure and other costs represent changes in sublease assumptions and reductions in our remaining lease obligations.
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 2, 2013	$	54		$	54		$	108
	Charges	15			9			24
	Cash payments	(53		)	(11		)	(64		)
	Adjustments	(5		)	8			3
	Changes in foreign currency exchange rates	—			(3		)	(3		)
	Balances at August 3, 2013	$	11		$	57		$	68
Restructuring Program 2013 U.S. [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Composition of Restructuring Charges	'
	The composition of the restructuring charges we incurred for this program in the six months ended August 2, 2014 and August 3, 2013, as well as the cumulative amount incurred through August 2, 2014, was as follows ($ in millions):
		Six Months Ended						Cumulative Amount
		August 2, 2014			3-Aug-13
	Continuing operations
	Property and equipment impairments	$	—		$	—		$	29
	Termination benefits	—			—			77
	Facility closure and other costs	(6		)	(8		)	139
	Total	$	(6	)	$	(8	)	$	245
Restructuring Accrual Activity	'
	The following tables summarize our restructuring accrual activity during the six months ended August 2, 2014, and August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
		Facility
		Closure and
		Other Costs
	Balances at February 1, 2014	$	58
	Charges	1
	Cash payments	(11		)
	Adjustments	(6		)
	Balances at August 2, 2014	$	42
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 2, 2013	$	4		$	113		$	117
	Charges	—			3			3
	Cash payments	(2		)	(31		)	(33		)
	Adjustments(1)	(2		)	(13		)	(15		)
	Balances at August 3, 2013	$	—		$	72		$	72
	-1	Adjustments to facility closure and other costs represent reductions in our remaining lease obligations.
Restructuring Program 2013 Europe [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring Accrual Activity	'
	The following table summarizes our restructuring accrual activity during the six months ended August 3, 2013, related to termination benefits and facility closure and other costs associated with this program ($ in millions):
		Termination			Facility			Total
		Benefits			Closure and
					Other Costs
	Balances at February 2, 2013	$	—		$	5		$	5
	Charges	36			2			38
	Cash payments	(2		)	(7		)	(9		)
	Adjustments(1)	(34		)	—			(34		)
	Balances at August 3, 2013	$	—		$	—		$	—
	-1	Represents the remaining liability written off as a result of the sale of Best Buy Europe, as described in Note 2, Discontinued Operations.
Restructuring Program 2012 [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring Accrual Activity	'
	The following table summarizes our restructuring accrual activity during the six months ended August 3, 2013, related to facility closure and other costs associated with this program ($ in millions):
		Facility
		Closure and
		Other Costs
	Balances at February 2, 2013	$	36
	Cash payments	(33		)
	Adjustments(1)	(1		)
	Changes in foreign currency exchange rates	(2		)
	Balances at August 3, 2013	$	—
	-1	Included within Adjustments is a $5 million charge related to a change in sublease assumptions, offset by a $6 million adjustment to write off the remaining liability as a result of the sale of Best Buy Europe, as described in Note 2, Discontinued Operations.

Debt_Tables

Debt (Tables)	6 Months Ended
	Aug. 02, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt	'
	Long-term debt consisted of the following ($ in millions):
		August 2, 2014			February 1, 2014			August 3, 2013
	2016 Notes	$	350		$	349		$	349
	2018 Notes	500			500			500
	2021 Notes	649			649			648
	Financing lease obligations	83			95			109
	Capital lease obligations	52			63			71
	Other debt	1			1			1
	Total long-term debt	1,635			1,657			1,678
	Less: current portion	(43		)	(45		)	(44		)
	Total long-term debt, less current portion	$	1,592		$	1,612		$	1,634

Earnings_per_Share_Tables

Earnings per Share (Tables)	6 Months Ended
	Aug. 02, 2014
Earnings Per Share [Abstract]	'
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	'
	The following table presents a reconciliation of the numerators and denominators of basic and diluted earnings per share from continuing operations attributable to Best Buy Co., Inc. ($ and shares in millions):
		Three Months Ended					Six Months Ended
		August 2, 2014			August 3, 2013		August 2, 2014			August 3, 2013
	Numerator
	Net earnings from continuing operations	$	146		$	237	$	607		$	334
	Net earnings from continuing operations attributable to noncontrolling interests	(1		)	—		(1		)	—
	Net earnings from continuing operations attributable to Best Buy Co., Inc.	$	145		$	237	$	606		$	334
	Denominator
	Weighted-average common shares outstanding	349.3			340.4		348.4			339.7
	Effect of potentially dilutive securities:
	Nonvested share awards	2.9			4		3.2			3.3
	Weighted-average common shares outstanding, assuming dilution	352.2			344.4		351.6			343
	Net earnings per share from continuing operations attributable to Best Buy Co., Inc.
	Basic	$	0.42		$	0.69	$	1.74		$	0.98
	Diluted	$	0.42		$	0.69	$	1.73		$	0.97

Comprehensive_Income_Tables

Comprehensive Income (Tables)	6 Months Ended
	Aug. 02, 2014
Equity [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The following tables provide a reconciliation of the components of accumulated other comprehensive income, net of tax, attributable to Best Buy Co., Inc. for the six months ended August 2, 2014, and the three and six months ended August 3, 2013, respectively ($ in millions). There was no change in the components of accumulated other comprehensive income for the three months ended August 2, 2014.
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at February 1, 2014	$	485		$	7		$	492
	Foreign currency translation adjustments	3			—			3
	Unrealized losses on available-for-sale investments	—			(1		)	(1		)
	Balances at August 2, 2014	$	488		$	6		$	494
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at May 4, 2013	$	80		$	2		$	82
	Foreign currency translation adjustments	(60		)	—			(60		)
	Reclassification of foreign currency translation adjustments into earnings due to sale of business	508			—			508
	Unrealized losses on available-for-sale investments	—			(2		)	(2		)
	Reclassification of losses on available-for-sale investments into earnings	—			1			1
	Balances at August 3, 2013	$	528		$	1		$	529
		Foreign Currency Translation			Available-For-Sale Investments			Total
	Balances at February 2, 2013	$	113		$	(1	)	$	112
	Foreign currency translation adjustments	(93		)	—			(93		)
	Reclassification of foreign currency translation adjustments into earnings due to sale of business	508			—			508
	Unrealized gains on available-for-sale investments	—			1			1
	Reclassification of losses on available-for-sale investments into earnings	—			1			1
	Balances at August 3, 2013	$	528		$	1		$	529

Segments_Tables

Segments (Tables)	6 Months Ended
	Aug. 02, 2014
Segment Reporting [Abstract]	'
Business Segment Information	'
	Revenue by reportable segment was as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Domestic	$	7,585		$	7,775		$	15,366		$	15,721
	International	1,311			1,491			2,565			2,892
	Total revenue	$	8,896		$	9,266		$	17,931		$	18,613
	Operating income (loss) by reportable segment and the reconciliation to earnings from continuing operations before income tax (benefit) expense were as follows ($ in millions):
		Three Months Ended						Six Months Ended
		August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	Domestic	$	258		$	420		$	484		$	642
	International	(20		)	(7		)	(49		)	(61		)
	Total operating income	238			413			435			581
	Other income (expense)
	Gain on sale of investments	2			14			2			14
	Investment income and other	8			5			14			10
	Interest expense	(23		)	(26		)	(46		)	(53		)
	Earnings from continuing operations before income tax (benefit) expense	$	225		$	406		$	405		$	552
	Assets by reportable segment were as follows ($ in millions):
		August 2, 2014			February 1, 2014			August 3, 2013
	Domestic	$	11,847		$	11,146		$	10,606
	International	2,502			2,867			2,678
	Total assets	$	14,349		$	14,013		$	13,284

Basis_of_Presentation_Details

Basis of Presentation (Details)	6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'
Number of weeks in fiscal period	'P26W	'P26W
Reporting period lag for consolidation of financial results	'1 month	'

Discontinued_Operations_Discon1

Discontinued Operations Discontinued Operations (Details)

0 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Jul. 03, 2013

Jun. 26, 2013

Jun. 26, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Feb. 28, 2009

Jun. 26, 2013

Jun. 26, 2013

Aug. 02, 2014

Aug. 03, 2013

USD ($)

USD ($)

GBP (£)

USD ($)

USD ($)

USD ($)

USD ($)

Best Buy Europe [Member]

June 26, 2015 [Member]

June 26, 2014 [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

USD ($)

USD ($)

Discontinued Operation, Additional Disclosures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

50.00%

'

'

'

'

Proceeds from Divestiture of Businesses

'

$526

£ 341

'

'

'

'

'

'

'

'

'

Dollar Amount of Shares Received from Divestiture of Business

'

123

80

'

'

'

'

'

'

'

'

'

Future Cash Consideration from Divestiture of Business, Due within One Year

'

39

25

'

'

'

'

'

'

'

'

'

Interest Rate on Future Cash Consideration from Divestiture of Business

'

'

'

'

'

'

'

'

2.50%

2.50%

'

'

Future Cash Consideration from Divestiture of Business, Due within Two Years

'

39

25

'

'

'

'

'

'

'

'

'

Dollar Amount of Shares Sold from Divestiture of Business

123

'

'

'

'

'

'

'

'

'

'

'

Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Revenue

'

'

'

0

1,287

0

2,750

'

'

'

'

'

Restructuring charges

'

'

'

0

[1]

47

[1]

0

[1]

100

[1]

'

'

'

0

100

Loss from discontinued operations before income tax benefit

'

'

'

0

-51

0

-235

'

'

'

'

'

Income tax benefit

'

'

'

0

38

[2]

0

24

[2]

'

'

'

'

'

Gain on sale of discontinued operations

'

'

'

2

24

2

52

'

'

'

'

'

Income tax expense on sale

'

'

'

-1

0

-1

0

'

'

'

'

'

Net gain (loss) from discontinued operations, including noncontrolling interests

'

'

'

1

11

1

-159

'

'

'

'

'

Net loss from discontinued operations attributable to noncontrolling interests

'

'

'

0

18

0

10

'

'

'

'

'

Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders

'

'

'

1

29

1

-149

'

'

'

'

'

Income Tax Expense (Benefit), Intraperiod Tax Allocation

'

'

'

'

27

'

'

'

'

'

'

'

Impairment of assets held for sale

'

'

'

'

'

'

$175

'

'

'

'

'

[1]

See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.

[2]

The effective tax rate for discontinued operations for the three and six months ended August 3, 2013 differs from the statutory tax rate primarily due to the previously mentioned tax allocation, restructuring charges and the $175 million impairment of our investment in Best Buy Europe, which generally included no related tax benefit. The deferred tax assets related to the restructuring charges generally resulted in an increase in the valuation allowance in an equal amount, while the investment impairment is not tax deductible.

Fair_Value_Measurements_Recurr

Fair Value Measurements - Recurring (Details) (USD $)

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Feb. 01, 2014

Aug. 02, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Feb. 01, 2014

Aug. 02, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Feb. 01, 2014

Aug. 02, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 02, 2014

Feb. 01, 2014

Feb. 01, 2014

Aug. 02, 2014

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

In Millions, unless otherwise specified

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Student Loan Bonds [Member]

Student Loan Bonds [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Other Observable Inputs (Level 2) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Significant Unobservable Inputs (Level 3) [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Treasury Bills [Member]

Treasury Bills [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Available-for-sale Securities [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Treasury Bills [Member]

Treasury Bills [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Available-for-sale Securities [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Treasury Bills [Member]

Treasury Bills [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Available-for-sale Securities [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Money Market Funds [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Treasury Bills [Member]

Treasury Bills [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Available-for-sale Securities [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Marketable securities that fund deferred compensation [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Foreign Exchange Contract [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Accrued Liabilities [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Accrued Liabilities [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Accrued Liabilities [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Cash and Cash Equivalents [Member]

Short-term Investments [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Accrued Liabilities [Member]

Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

$211

$53

$334

$111

$80

'

'

$263

'

'

'

'

'

'

'

'

'

'

'

'

$211

$53

$334

$0

$0

'

'

$263

'

'

'

'

'

'

'

'

'

'

'

'

$0

$0

$0

$111

$80

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

$0

$0

$0

$0

$0

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Short-term investments

'

'

'

'

'

364

100

'

100

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

100

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

364

100

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Current Assets, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

2

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

2

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

Other Assets, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

9

9

16

4

98

96

91

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

4

98

96

91

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

9

9

16

0

0

0

0

'

'

'

'

'

'

Liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Foreign currency derivative instruments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

($5)

($5)

Fair_Value_Measurements_Nonrec

Fair Value Measurements - Nonrecurring (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014		Aug. 03, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Tradename, impairments	'		$22
Impairment of assets held for sale	'		175
Continuing Operations [Member] | Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property and equipment, impairments	31		19
Property and equipment, remaining net carrying value	8	[1]	0	[1]
Total impairments	31		22
Total remaining net carrying value	8	[1]	0	[1]
Discontinued Operations [Member] | Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property and equipment, impairments	0	[2],[3]	220	[2],[3]
Property and equipment, remaining net carrying value	0	[1]	0	[1]
Total impairments	0		224
Total remaining net carrying value	0	[1]	0	[1]
Tradename [Member] | Discontinued Operations [Member] | Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Tradename, impairments	0	[3]	4	[3]
Tradename, remaining net carrying value	0	[1]	0	[1]
Property and equipment write-downs [Member] | Continuing Operations [Member] | Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property and equipment, impairments	0	[4]	3	[4]
Property and equipment, remaining net carrying value	$0	[1],[4]	$0	[1],[4]
[1]	Remaining net carrying value approximates fair value.
[2]	Includes the $175 million impairment to write down the book value of our investment in Best Buy Europe to fair value based on expected net proceeds as described in Note 2, Discontinued Operations. The impairment was calculated based on the fair value and foreign currency translation adjustment associated with the business and was applied to the fixed assets.
[3]	Property and equipment and tradename impairments associated with discontinued operations are recorded within gain (loss) from discontinued operations in our Consolidated Statements of Earnings.
[4]	See Note 5, Restructuring Charges, for additional information.

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014		Aug. 03, 2013	Feb. 01, 2014
Goodwill [Roll Forward]	'		'	'
Goodwill, Balance at the beginning of the period	$425		$528	'
Goodwill, Changes in foreign currency exchange rates	0		0	'
Goodwill, Impairments	'		0	'
Goodwill, Balance at the end of the period	425		528	'
Indefinite-lived Tradenames [Roll Forward]	'		'	'
Indefinite-lived Tradenames, Beginning balance	101		131	'
Indefinite-lived Intangible Assets Held For Sale	'		-2	'
Indefinite-lived Tradenames, Impairments	'		-22	'
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	-1		-4	'
Indefinite-lived Tradenames, Ending balance	100		103	'
Gross amount of goodwill and the accumulated goodwill impairment losses	'		'	'
Gross Carrying Amount	1,308	[1]	1,412	1,308	[1]
Cumulative Impairment	-883	[1]	-884	-883	[1]
Domestic [Member]	'		'	'
Goodwill [Roll Forward]	'		'	'
Goodwill, Balance at the beginning of the period	425		528	'
Goodwill, Changes in foreign currency exchange rates	0		0	'
Goodwill, Impairments	'		0	'
Goodwill, Balance at the end of the period	425		528	'
Indefinite-lived Tradenames [Roll Forward]	'		'	'
Indefinite-lived Tradenames, Beginning balance	19		19	'
Indefinite-lived Intangible Assets Held For Sale	'		0	'
Indefinite-lived Tradenames, Impairments	'		0	'
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	0		0	'
Indefinite-lived Tradenames, Ending balance	19		19	'
International [Member]	'		'	'
Goodwill [Roll Forward]	'		'	'
Goodwill, Balance at the beginning of the period	0		0	'
Goodwill, Changes in foreign currency exchange rates	0		0	'
Goodwill, Impairments	'		0	'
Goodwill, Balance at the end of the period	0		0	'
Indefinite-lived Tradenames [Roll Forward]	'		'	'
Indefinite-lived Tradenames, Beginning balance	82		112	'
Indefinite-lived Intangible Assets Held For Sale	'		-2	'
Indefinite-lived Tradenames, Impairments	'		-22	'
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	-1		-4	'
Indefinite-lived Tradenames, Ending balance	$81		$84	'
[1]	Excludes the gross carrying amount and cumulative impairment related to mindSHIFT goodwill, which was sold during the fourth quarter of fiscal 2014.

Restructuring_Charges_Renew_Bl

Restructuring Charges - Renew Blue (Details) (USD $)	6 Months Ended			21 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014		Aug. 03, 2013	Aug. 02, 2014
Restructuring Reserve [Roll Forward]	'		'	'
Charges	$8		$113	'
Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Reserve [Roll Forward]	'		'	'
Restructuring reserve, balance at the beginning of the period	162		108	'
Charges	35		24	'
Cash payments	-115		-64	'
Adjustments	-20	[1]	3	'
Changes in foreign currency exchange rates	-5		-3	'
Restructuring reserve, balance at the end of the period	57		68	57
Termination benefits [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Reserve [Roll Forward]	'		'	'
Restructuring reserve, balance at the beginning of the period	111		54	'
Charges	28		15	'
Cash payments	-106		-53	'
Adjustments	-16	[1]	-5	'
Changes in foreign currency exchange rates	0		0	'
Restructuring reserve, balance at the end of the period	17		11	17
Facility closure and other costs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Reserve [Roll Forward]	'		'	'
Restructuring reserve, balance at the beginning of the period	51		54	'
Charges	7		9	'
Cash payments	-9		-11	'
Adjustments	-4	[1]	8	'
Changes in foreign currency exchange rates	-5		-3	'
Restructuring reserve, balance at the end of the period	40		57	40
Continuing Operations [Member]	'		'	'
Restructuring Reserve [Roll Forward]	'		'	'
Charges	8		13	'
Continuing Operations [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	350
Restructuring Reserve [Roll Forward]	'		'	'
Charges	14		21	'
Continuing Operations [Member] | Inventory write-downs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	1
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | Property and equipment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	40
Restructuring Reserve [Roll Forward]	'		'	'
Charges	1		3	'
Continuing Operations [Member] | Termination benefits [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	201
Restructuring Reserve [Roll Forward]	'		'	'
Charges	12		14	'
Continuing Operations [Member] | Investment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	43
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | Facility closure and other costs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	65
Restructuring Reserve [Roll Forward]	'		'	'
Charges	1		4	'
Continuing Operations [Member] | Domestic [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	220
Restructuring Reserve [Roll Forward]	'		'	'
Charges	7		10	'
Continuing Operations [Member] | Domestic [Member] | Inventory write-downs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	1
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | Domestic [Member] | Property and equipment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	14
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		2	'
Continuing Operations [Member] | Domestic [Member] | Termination benefits [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	159
Restructuring Reserve [Roll Forward]	'		'	'
Charges	7		8	'
Continuing Operations [Member] | Domestic [Member] | Investment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	43
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | Domestic [Member] | Facility closure and other costs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	3
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | International [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	130
Restructuring Reserve [Roll Forward]	'		'	'
Charges	7		11	'
Continuing Operations [Member] | International [Member] | Inventory write-downs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	0
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | International [Member] | Property and equipment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	26
Restructuring Reserve [Roll Forward]	'		'	'
Charges	1		1	'
Continuing Operations [Member] | International [Member] | Termination benefits [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	42
Restructuring Reserve [Roll Forward]	'		'	'
Charges	5		6	'
Continuing Operations [Member] | International [Member] | Investment impairments [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	0
Restructuring Reserve [Roll Forward]	'		'	'
Charges	0		0	'
Continuing Operations [Member] | International [Member] | Facility closure and other costs [Member] | Restructuring Program 2013 Renew Blue [Member]	'		'	'
Restructuring Cost and Reserve [Line Items]	'		'	'
Cumulative Amount	'		'	62
Restructuring Reserve [Roll Forward]	'		'	'
Charges	$1		$4	'
[1]	Adjustments to termination benefits were due to higher-than-expected employee retention. Adjustments to facility closure and other costs represent changes in sublease assumptions and reductions in our remaining lease obligations.

Restructuring_Charges_Fiscal_2

Restructuring Charges - Fiscal 2013 U.S. (Details) (USD $)

6 Months Ended

3 Months Ended

6 Months Ended

30 Months Ended

6 Months Ended

30 Months Ended

6 Months Ended

30 Months Ended

6 Months Ended

30 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

5-May-12

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 02, 2014

Aug. 02, 2014

Continuing Operations [Member]

Continuing Operations [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Restructuring Program 2013 U.S. [Member]

Termination benefits [Member]

Facility closure and other costs [Member]

Facility closure and other costs [Member]

Domestic [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

store

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Domestic [Member]

Property and equipment impairments [Member]

Property and equipment impairments [Member]

Termination benefits [Member]

Termination benefits [Member]

Facility closure and other costs [Member]

Facility closure and other costs [Member]

Facility closure and other costs [Member]

Property and equipment impairments [Member]

Termination benefits [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring Charges, Operating Income Impact

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0

$0

Number of stores to be closed

'

'

'

'

'

'

'

'

49

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cumulative Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

245

'

29

'

77

'

'

139

'

'

Restructuring Reserve [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring reserve, balance at the beginning of the period

'

'

'

'

117

4

58

113

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Charges

8

113

8

13

3

0

1

3

'

-6

-8

-6

-8

'

0

'

0

'

-6

-8

'

'

'

Cash payments

'

'

'

'

-33

-2

-11

-31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjustments

'

'

'

'

-15

-2

-6

-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring reserve, balance at the end of the period

'

'

'

'

$72

$0

$42

$72

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring_Charges_Fiscal_21

Restructuring Charges - Fiscal 2013 Europe (Details) (USD $)

3 Months Ended

6 Months Ended

6 Months Ended

21 Months Ended

In Millions, unless otherwise specified

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Feb. 28, 2009

Aug. 03, 2013

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

3-May-14

Discontinued Operations [Member]

Discontinued Operations [Member]

Best Buy Europe [Member]

Restructuring Program 2013 Europe [Member]

Restructuring Program 2013 Europe [Member]

Restructuring Program 2013 Europe [Member]

Restructuring Program 2013 Europe [Member]

Restructuring Program 2013 Europe [Member]

Restructuring Program 2013 Europe [Member]

Termination benefits [Member]

Facility closure and other costs [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

International [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring charges

'

'

$8

$113

'

'

'

$38

$36

$2

'

'

'

Restructuring charges

0

[1]

47

[1]

0

[1]

100

[1]

0

100

'

'

'

'

0

95

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

Cumulative Amount

'

'

'

'

'

'

'

95

'

'

'

'

131

Restructuring Reserve [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring reserve, balance at the beginning of the period

'

'

'

'

'

'

'

5

0

5

'

'

'

Cash payments

'

'

'

'

'

'

'

-9

-2

-7

'

'

'

Restructuring reserve, balance at the end of the period

'

'

'

'

'

'

'

0

0

0

'

'

'

Adjustments

'

'

'

'

'

'

'

($34)

($34)

$0

'

'

'

[1]

See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.

Restructuring_Charges_Fiscal_22

Restructuring Charges - Fiscal 2012 (Details) (USD $)

3 Months Ended

6 Months Ended

29 Months Ended

6 Months Ended

29 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 02, 2014

Aug. 02, 2014

Aug. 03, 2013

Continuing Operations [Member]

Continuing Operations [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Restructuring Program 2012 [Member]

Facility closure and other costs [Member]

Domestic [Member]

International [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring charges

$0

[1]

$47

[1]

$0

[1]

$100

[1]

'

'

$0

$100

$5

$5

'

'

'

$0

$5

Cumulative Amount

'

'

'

'

'

'

'

'

'

246

'

22

224

'

'

Restructuring Reserve [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring reserve, balance at the beginning of the period

'

'

'

'

'

'

'

'

'

'

36

'

'

'

'

Restructuring charges

'

'

8

113

8

13

'

'

'

'

'

'

'

'

'

Cash payments

'

'

'

'

'

'

'

'

'

'

-33

'

'

'

'

Adjustments

'

'

'

'

'

'

'

'

'

'

-1

'

'

'

'

Changes in foreign currency exchange rates

'

'

'

'

'

'

'

'

'

'

-2

'

'

'

'

Restructuring reserve, balance at the end of the period

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

Restructuring Reserve, Accrual Adjustment, Write-off Related to Sale of Business

'

'

'

'

'

'

'

'

'

($6)

'

'

'

'

'

[1]

See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.

Debt_Credit_Facilities_Details

Debt Credit Facilities (Details) (USD $)	Aug. 02, 2014
New US Revolving Credit Facility, 364 Day [Domain]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Previous Borrowing Capacity	$500,000,000
New US Revolving Credit Facility, Five-Year [Domain]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Current Borrowing Capacity	1,250,000,000
Debt Instrument, Basis Spread on Federal Funds Rate	0.50%
Debt Instrument, Basis Spread on LIBOR	1.00%
Debt Instrument, Lower Range on Annual Base Rate	0.00%
Debt Instrument, Higher Range on Annual Base Rate	0.93%
Debt Instrument, Basis Spread on Variable Rate, Low End of Range	1.00%
Debt Instrument, Basis Spread on Variable Rate, High End of Range	1.93%
Debt Instrument, Lower Range on Facility Fee	0.13%
Debt Instrument, Higher Range on Facility Fee	0.33%
US Revolving Credit Facility, Five-Year [Domain]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Previous Borrowing Capacity	$1,500,000,000

Long_Term_Debt_Details

Long Term Debt (Details) (USD $)	Aug. 02, 2014	Feb. 01, 2014	Aug. 03, 2013
In Millions, unless otherwise specified
Long-term Debt	'	'	'
Total long-term debt	$1,635	$1,657	$1,678
Less: current portion	-43	-45	-44
Total long-term debt, less current portion	1,592	1,612	1,634
Long-term Debt, Fair Value	1,670	1,690	1,673
2016 Notes [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	350	349	349
2018 Notes [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	500	500	500
2021 Notes [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	649	649	648
Financing Lease Obligations [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	83	95	109
Capital Lease Obligations [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	52	63	71
Other Debt [Member]	'	'	'
Long-term Debt	'	'	'
Total long-term debt	$1	$1	$1

Derivative_Instruments_Details

Derivative Instruments (Details)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 03, 2013

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 03, 2013

Aug. 03, 2013

Feb. 28, 2009

GBP (£)

USD ($)

USD ($)

Operating Expense [Member]

Operating Expense [Member]

Operating Expense [Member]

Operating Expense [Member]

Operating Expense [Member]

Operating Expense [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Best Buy Europe [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Discontinued Operations [Member]

Discontinued Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Continuing Operations [Member]

Discontinued Operations [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

Derivatives, Fair Value [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contract term

'

'12 months

'

'

'

'

'

'

'

'

'

'

'

'

Notional Amount

'

'

'

'

'

'

'

'

'

$95

$157

$123

£ 455

'

Gain (loss) on foreign currency derivative instruments not designated as hedging instruments

'

'

'

-1

5

-4

6

3

-2

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

Proceeds from divestiture of businesses

£ 471

$37

$67

'

'

'

'

'

'

'

'

'

'

'

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Numerator	'	'	'	'
Net earnings from continuing operations	$146	$237	$607	$334
Net earnings from continuing operations attributable to noncontrolling interests	-1	0	-1	0
Net earnings from continuing operations attributable to Best Buy Co., Inc.	$145	$237	$606	$334
Denominator	'	'	'	'
Weighted-average common shares outstanding (in shares)	349.3	340.4	348.4	339.7
Effect of potentially dilutive securities:	'	'	'	'
Nonvested share awards (in shares)	2.9	4	3.2	3.3
Weighted-average common shares outstanding, assuming dilution (in shares)	352.2	344.4	351.6	343
Net earnings per share from continuing operations attributable to Best Buy Co., Inc.	'	'	'	'
Basic (in dollars per share)	$0.42	$0.69	$1.74	$0.98
Diluted (in dollars per share)	$0.42	$0.69	$1.73	$0.97
Antidilutive securities excluded from computation of earnings per share	13.5	19.2	13.5	21.7

Comprehensive_Income_Details

Comprehensive Income (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Total, Beginning Balance	'	'	$492	'
Reclassification of foreign currency translation adjustments into earnings due to sale of business	0	654	0	654
Unrealized gains (losses) on available-for-sale investments	0	-3	-1	0
Reclassification of losses on available-for-sale investments into earnings	0	2	0	2
Total, Ending Balance	494	529	494	529
Best Buy Co., Inc. [Member]	'	'	'	'
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]	'	'	'	'
Foreign Currency Translation, Beginning Balance	'	80	485	113
Available-For-Sale Investments, Beginning Balance	'	2	7	-1
Total, Beginning Balance	'	82	492	112
Foreign currency translation adjustments	'	-60	3	-93
Reclassification of foreign currency translation adjustments into earnings due to sale of business	'	508	'	508
Unrealized gains (losses) on available-for-sale investments	'	-2	-1	1
Reclassification of losses on available-for-sale investments into earnings	'	1	'	1
Foreign Currency Translation, Ending Balance	488	528	488	528
Available-For-Sale Investments, Ending Balance	6	1	6	1
Total, Ending Balance	$494	$529	$494	$529

Income_Taxes_Details

Income Taxes (Details) (USD $)	6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Mar. 03, 2012
			Best Buy Europe [Member]
Effective Income Tax Rate Reconciliation [Line Items]	'	'	'
Profit Share Buy-Out Purchase Price	'	'	$1,300,000,000
Effective Income Tax Rate Reconciliation, Percent	-50.00%	39.40%	'
Income Tax Expense (Benefit), Tax Election	($353,000,000)	'	'
Effective Income Tax Rate Reconciliation, Percent, without Tax Election	'	37.20%	'

Segments_Details

Segments (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013	Feb. 01, 2014
			segments
Segment Reporting [Abstract]	'	'	'	'	'
Number of reportable segments	'	'	2	'	'
Business segment information	'	'	'	'	'
Total revenue	$8,896	$9,266	$17,931	$18,613	'
Operating income (loss)	238	413	435	581	'
Gain on sale of investments	2	14	2	14	'
Other income (expense)	'	'	'	'	'
Investment income and other	8	5	14	10	'
Interest expense	-23	-26	-46	-53	'
Earnings from continuing operations before income tax (benefit) expense	225	406	405	552	'
Total assets	14,349	13,284	14,349	13,284	14,013
Domestic [Member]	'	'	'	'	'
Business segment information	'	'	'	'	'
Total revenue	7,585	7,775	15,366	15,721	'
Operating income (loss)	258	420	484	642	'
Other income (expense)	'	'	'	'	'
Total assets	11,847	10,606	11,847	10,606	11,146
International [Member]	'	'	'	'	'
Business segment information	'	'	'	'	'
Total revenue	1,311	1,491	2,565	2,892	'
Operating income (loss)	-20	-7	-49	-61	'
Other income (expense)	'	'	'	'	'
Total assets	$2,502	$2,678	$2,502	$2,678	$2,867

Contingencies_Details

Contingencies (Details) (Pending Litigation [Member], USD $)	1 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012	Nov. 30, 2012
Pending Litigation [Member]	'	'
Loss Contingencies [Line Items]	'	'
Loss contingency, settlement agreement consideration, plaintiff amount	$5	$22
Loss contingency, settlement agreement consideration, attorneys amount	$6	'