Fair Value Measurements (Narrative) (Details) (USD $)	9 Months Ended
	Nov. 03, 2013	Oct. 28, 2012	Feb. 03, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	$ 0	$ 97,000,000
Carrying value of senior notes	15,500,000,000		10,300,000,000
Senior Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior notes	$ 16,600,000,000		$ 12,200,000,000