Assumptions used to Calculate Net Benefit cost (Detail)	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Pension Benefits
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	4.16%	4.99%	5.25%
Rate of compensation increase	3.68%	3.69%	3.68%
Expected long-term rate of return on assets	6.63%	6.59%	7.22%
Postretirement Benefits
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	4.00%	4.60%	4.90%