Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 03, 2012	Feb. 26, 2011	Feb. 27, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	$ 1,207	$ 0	$ 0
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	32	122
Property and equipment, remaining net carrying value	0	49
Total impairments	1,239	122
Total remaining net carrying value	0	49
Discontinued 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	111	25
Property and equipment, remaining net carrying value	0	2
Total impairments	114	35
Total remaining net carrying value	0	5
Discontinued Operations [Member] | Trade Names [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]
Tradename, impairments	3	10
Tradename, remaining net carrying value	0	3
Best Buy Europe [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]
Goodwill impairment	1,207	0
Goodwill, remaining net carrying value	$ 0	$ 0