XML 167 R126.htm IDEA: XBRL DOCUMENT v3.3.1.900
Pension and Postretirement Health Care Plans - Schedule of Benefit Obligation Weighted Average Assumptions (Details) - Pension Plan
Jan. 30, 2016
Jan. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.70% 3.87%
Average assumed rate of compensation increase 3.00% 3.00%