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Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details) (USD $)
In Millions, unless otherwise specified
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12 Months Ended |
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Feb. 01, 2014
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Feb. 02, 2013
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Jan. 31, 2013
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Primary Pension Plan
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|
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
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| Net loss/(gain) |
$ 898 |
$ 1,679 |
|
| Prior service cost/(credit) |
53 |
42 |
|
| Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total |
951 |
1,721 |
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| Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year |
57 |
|
|
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Supplemental Pension Plans
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|
|
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
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| Net loss/(gain) |
127 |
185 |
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| Prior service cost/(credit) |
(6) |
3 |
|
| Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total |
121 |
188 |
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| Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year |
15 |
|
|
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Other Postretirement Benefit Plan, Defined Benefit [Member]
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|
|
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
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| Net loss/(gain) |
(6) |
|
(7) |
| Prior service cost/(credit) |
(15) |
|
(23) |
| Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total |
(21) |
|
(30) |
| Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year |
$ (1) |
$ (8) |
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