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Retirement Benefit Plans (Benefit Obligation Actuarial Assumptions) (Details)
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Jan. 31, 2015
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Feb. 01, 2014
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Feb. 02, 2013
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Sep. 30, 2012
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| Compensation and Retirement Disclosure [Abstract] | ||||
| Discount rate | 3.87% | 4.89% | 4.19% | 4.25% |
| Salary progression rate | 3.50% | 3.50% | 4.70% |