Fair Value Measurements (Details 3) (Segment, Continuing Operations [Member], Fair Value, Measurements, Nonrecurring [Member], Fair Value, Inputs, Level 3 [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	May 05, 2012	Apr. 30, 2011
Segment, 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	$ 26	$ 1
Property and equipment, remaining net carrying value	$ 0	$ 0