(Separation Transaction Expenses) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 01, 2013	Oct. 31, 2012	Nov. 01, 2013	Oct. 31, 2012
Spin Off Transaction [Line Items]
Strategic advisory services	$ 5		$ 7
Legal and accounting services	1		1
Lease termination and facility consolidation expenses	17		40
Severance costs	2		10
Separation transaction expenses in operating income	25	0	58	0
Less: income tax benefit	(10)		(23)
Separation transaction expenses, net of tax	$ 15		$ 35