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Postretirement Benefits (Weighted-Average Assumptions Used To Determine Benefit Obligations And SERP Expense) (Details)
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Assumptions used to determine benefit obligation:      
Discount rate 4.00% 4.00% 5.00%
Rate of compensation increase 3.00% 3.00% 3.00%
Assumptions used to determine SERP expense:      
Discount rate 4.00% 5.00% 4.00%
Rate of compensation increase 3.00% 3.00% 3.00%