Income Tax - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 28, 2012	Oct. 28, 2012	Jun. 29, 2012	Jan. 29, 2012
Income Taxes [Line Items]
Combined federal, state and foreign effective tax rate for continuing operations		8.00%
Increased income tax expense, impact of amortization of indefinite lived intangibles	$ 1	$ 34
Reduction in income tax expenses		6
Business acquisition, deferred tax liabilities recorded	6	6	6
Unrecognized tax benefits, increase resulting from acquisition		1
Unrecognized tax benefits, increase in accrual for interest resulting from prior period tax positions	3	7
Unrecognized tax benefits, net accrual for interest	23	23		19
Unrecognized tax benefits	197	197		196
Deferred tax assets, valuation allowance	$ 676	$ 676