Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Expense Actuarial Assumptions) (Details)

v3.8.0.1
Retirement Benefit Plans (Expense Actuarial Assumptions) (Details)
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Expected return on plan assets 6.50% 6.75% 6.75%
Discount rate 4.40% [1] 4.73% 3.87%
Salary increase 3.90% 3.90% 3.50%
Discount rate 3.98% 4.40% 4.73%
Narrative description of basis used to determine overall expected long-term rate-of-return on asset assumption The expected return on plan assets is based on the plan’s long-term asset allocation policy, historical returns for plan assets and overall capital market returns, taking into account current and expected market conditions.    
Assumptions used in calculations, description The discount rate used to measure pension expense each year is the rate as of the beginning of the year (i.e., the prior measurement date). The discount rate used, determined by the plan actuary, was based on a hypothetical AA yield curve represented by a series of bonds maturing over the next 30 years, designed to match the corresponding pension benefit cash payments to retirees.    
Maximum [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Assumptions used calculating net periodic benefit cost, discount rate calculation, bond term 30 years    
[1] As of January 31, 2017. The Primary Pension Plan was remeasured as of March 31, 2017 using a discount rate of 4.34% and as of October 31, 2017 using a discount rate of 3.94%.