Supplemental Balance Sheet and Cash Flow Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 28, 2012	Oct. 30, 2011	Oct. 28, 2012 14.875% Senior Notes due 2020	Oct. 28, 2012 14.875% Senior Notes due 2020	Oct. 30, 2011 13.5% Senior Subordinated Notes due 2015	Oct. 28, 2012 13.5% Senior Subordinated Notes due 2015
Supplementary Information [Line Items]
Interest payments, period			11	11		8
Interest payments, amount paid in kind			$ 56	$ 56	$ 223
Cash paid for interest	576	340
Cash paid for income taxes, net of refunds	$ 2	$ 4