Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (Losses)	$ (15)	$ (60)	$ (247)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
HD Supply investment			0
Guarantee of HD Supply loan		(67)
Business Restructuring Reserves [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (Losses)	(15)	(9)	(84)
Business Restructuring Reserves [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]
Lease obligation costs, net	(144)	(158)	(191)
Cost-method Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (Losses)			(163)
Financial Guarantee [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (Losses)		$ (51)