Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Benefit Obligation Actuarial Assumptions) (Details)

v3.6.0.2
Retirement Benefit Plans (Benefit Obligation Actuarial Assumptions) (Details)
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Compensation and Retirement Disclosure [Abstract]      
Discount rate 4.40% 4.73% 3.87%
Salary progression rate 3.90% 3.90% 3.50%