EMPLOYEE BENEFIT PLANS (Details 3)	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Pension Benefits
Weighted average assumptions used to determine benefit obligations
Discount rate (as a percent)	3.20%	4.20%
Weighted average assumptions used to determine net periodic benefit expense (income)
Discount rate (as a percent)	4.20%	3.80%	4.10%
Expected long-term return on plan assets (as a percent)	6.80%	6.60%	7.20%
Medical and Life Insurance Benefits
Weighted average assumptions used to determine benefit obligations
Discount rate (as a percent)	3.20%	4.20%
Weighted average assumptions used to determine net periodic benefit expense (income)
Discount rate (as a percent)	4.20%	3.80%	4.10%
Assumed health care cost trend rates
Assumed annual rate of increase in per capita cost of covered health care benefits for 2015 (as a percent)	6.50%
Ultimate trend rate as of 2018 (as a percent)	5.00%