Assumed Health Care Cost Trend Rates Related to Measurement of SERP Medical Plan Obligations (Detail)	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Medical care | Defined Benefit Obligations
Health Care Cost Trend Rates Assumptions [Line Items]
Initial cost trend rate	7.50%	8.00%	8.50%
Ultimate cost trend rate	5.00%	5.00%	5.00%
Year that the ultimate cost trend rate is reached	2018	2018	2016
Medical care | Net Periodic Benefit Costs
Health Care Cost Trend Rates Assumptions [Line Items]
Initial cost trend rate	8.00%	8.50%	9.00%
Ultimate cost trend rate	5.00%	5.00%	5.00%
Year that the ultimate cost trend rate is reached	2018	2016	2016
Dental care | Defined Benefit Obligations
Health Care Cost Trend Rates Assumptions [Line Items]
Initial cost trend rate	5.00%	5.50%	5.50%
Ultimate cost trend rate	5.00%	5.00%	5.00%
Year that the ultimate cost trend rate is reached	2013	2013	2012
Dental care | Net Periodic Benefit Costs
Health Care Cost Trend Rates Assumptions [Line Items]
Initial cost trend rate	5.50%	5.50%	6.00%
Ultimate cost trend rate	5.00%	5.00%	5.00%
Year that the ultimate cost trend rate is reached	2013	2012	2012