Retirement Benefit Plans (Expense Actuarial Assumptions) (Details) |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Jan. 30, 2016 |
Jan. 31, 2015 |
Feb. 01, 2014 |
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||||
| Expected return on plan assets | 6.80% | 7.00% | 7.00% | |||
| Discount rate | 3.87% | 4.89% | 4.19% | [1] | ||
| Salary increase | 3.50% | 3.50% | 4.70% | |||
| Discount rate | 4.73% | 3.87% | 4.89% | |||
| 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 | |||||
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