Fair Value Measurements - Impairments (Details) (USD $) In Millions, unless otherwise specified	11 Months Ended		12 Months Ended		11 Months Ended		12 Months Ended		6 Months Ended	11 Months Ended		12 Months Ended		11 Months Ended		12 Months Ended		11 Months Ended		12 Months Ended		11 Months Ended		12 Months Ended		11 Months Ended		12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Feb. 01, 2014	Mar. 03, 2012	Feb. 02, 2013 Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Aug. 03, 2013 Discontinued Operations [Member]	Feb. 02, 2013 Discontinued Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Discontinued Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 02, 2013 Discontinued Operations [Member] Trade Names [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Discontinued Operations [Member] Trade Names [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 02, 2013 Best Buy Europe [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Best Buy Europe [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 02, 2013 Property and equipment write-downs [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Property and equipment write-downs [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 02, 2013 Investments Impairment Charge Related to Restructuring [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]		Feb. 01, 2014 Investments Impairment Charge Related to Restructuring [Member] Continuing Operations [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, impairments					$ 60		$ 101			$ 11	[1],[2]	$ 220	[1],[2]									$ 59	[3]	$ 9	[3]
Property and equipment, remaining net carrying value					8	[4]	10	[4]		0	[1],[2],[4]	0	[1],[2],[4]									0	[3],[4]	0	[3],[4]
Goodwill impairments	822	0	0	0														822	[5]	0	[5]
Goodwill, remaining net carrying value																		0	[4],[5]	0	[4],[5]
Investments, impairments																										27	[3]	16	[3]
Investments, remaining net carrying value																										38	[3],[4]	21	[3],[4]
Tradename, impairments	0		4	0										0	[2]	4	[2]
Tradename, remaining net carrying value														0	[2],[4]	0	[2],[4]
Total impairments					968		126			11	[2]	224	[2]
Total remaining net carrying value					46	[4]	31	[4]		0	[2],[4]	0	[2],[4]
Impairment of Long-Lived Assets to be Disposed of									$ 175

[1] Includes the $175 million impairment to write down the book value of our investment in Best Buy Europe to fair value. Upon completion of the sale of Best Buy Europe as described in Note 4, Discontinued Operations, the remaining net carrying values of all assets have been reduced to zero.

[2] Property and equipment and tradename impairments associated with discontinued operations are recorded within gain (loss) from discontinued operations in our Consolidated Statements of Earnings.

[3] See Note 6, Restructuring Charges, for additional information.

[4] (1)Remaining net carrying value approximates fair value.

[5] (2)See Note 1, Significant Accounting Policies, for additional information.