Annual report pursuant to Section 13 and 15(d)

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

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Retirement Benefit Plans (Benefit Obilgation Actuarial Assumptions) (Details)
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Retirement Benefit Plans [Abstract]      
Discount rate 4.82% 5.65% 5.90%
Salary progression rate 4.70% 4.70% 4.70%