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Retirement Benefit Plans Retirement Benefit Plans (Accumulated Benefit Obligation) (Details) (USD $)
In Millions, unless otherwise specified |
Feb. 01, 2014
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Feb. 02, 2013
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Jan. 27, 2012
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|---|---|---|---|
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Primary Pension Plan
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Accumulated benefit obligation | $ 4,200 | $ 4,700 | |
| Fair value of plan assets | 5,140 | 5,035 | 5,176 |
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Supplemental Pension Plans
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Accumulated benefit obligation | 200 | 268 | |
| Fair value of plan assets | $ 0 | $ 0 | $ 0 |