Changes in Accumulated Other Comprehensive Loss (Pre-Tax) (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Pension Benefits
Schedule of Pension and Other Postretirement Benefits Recognized In Accumulated Other Comprehensive Income Loss [Line Items]
Net benefit expense (income)	$ 19	$ 23	$ 18
Amortization of prior service cost			(1)
Pension Benefits | One Year from Balance Sheet Date
Schedule of Pension and Other Postretirement Benefits Recognized In Accumulated Other Comprehensive Income Loss [Line Items]
Net benefit expense (income)	16
Postretirement Benefits
Schedule of Pension and Other Postretirement Benefits Recognized In Accumulated Other Comprehensive Income Loss [Line Items]
Net benefit expense (income)	(5)	(6)	(6)
Amortization of prior service cost	1
Postretirement Benefits | One Year from Balance Sheet Date
Schedule of Pension and Other Postretirement Benefits Recognized In Accumulated Other Comprehensive Income Loss [Line Items]
Net benefit expense (income)	(4)
Amortization of prior service cost	$ (1)