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Retirement Benefit Plans (Expense Actuarial Assumptions) (Details)
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12 Months Ended | |||||||
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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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Jan. 29, 2011
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Sep. 30, 2012
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||||
| Expected return on plan assets | 7.00% | 7.00% | 7.50% | 8.40% | ||||
| Discount rate | 4.89% | 4.19% | 4.82% | [1] | ||||
| Salary increase | 3.50% | 4.70% | 4.70% | |||||
| Discount rate | 3.87% | 4.89% | 4.19% | 4.25% | ||||
| 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. In 2012 and 2011, the expected return on plan assets was 7.5%, which was reduced from the 2010 rate of 8.4% to align our expected rate of return with our new asset allocation targets. The expected return assumption for 2013 and 2014 was further reduced from 7.5% to 7.0% given our new asset allocation targets and updated expected capital markets return assumptions. | |||||||
| 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). For the 2011 year-end remeasurement, used to calculate 2012 expense, the discount rate used was based on an externally published yield curve determined by the plan’s actuary. The yield curve is a hypothetical AA yield curve represented by a series of bonds maturing from six months to 30 years, designed to match the corresponding pension benefit cash payments to retirees. Beginning with the remeasurement on September 30, 2012, 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. | |||||||
| Minimum [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 | 6 months | |||||||
| 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 | |||||||
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