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Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income/ (Loss) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Nov. 01, 2014
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Nov. 02, 2013
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Nov. 01, 2014
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Nov. 02, 2013
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax | $ 16 | $ 43 | $ 49 | $ 131 | ||||||
| Total, net of tax | 9 | 26 | 29 | 80 | ||||||
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Reclassification out of Accumulated Other Comprehensive Income [Member]
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Total reclassifications | 9 | 26 | 29 | 80 | ||||||
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Reclassification out of Accumulated Other Comprehensive Income [Member] | Total Amortization Of Retirement Benefit Plans, Net Of Tax [Member]
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Total, net of tax | 9 | 26 | 29 | 80 | ||||||
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Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension [Member]
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Amortization of retirement benefit plans, Actuarial loss/(gain) | 16 | [1] | 44 | [1] | 49 | [1] | 132 | [1] | ||
| Amortization of retirement benefit plans, Prior service cost/(credit) | 1 | [1] | 1 | [1] | 5 | [1] | 4 | [1] | ||
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Reclassification out of Accumulated Other Comprehensive Income [Member] | SG&A [Member]
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Amortization of retirement benefit plans, Prior service cost/(credit) | (2) | [1] | (2) | [1] | (6) | [1] | (6) | [1] | ||
| Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax | 0 | [1] | (1) | [1] | 0 | [1] | (1) | [1] | ||
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Reclassification out of Accumulated Other Comprehensive Income [Member] | Income Tax (Expense)/Benefit [Member]
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| Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||||||||||
| Amortization of retirement benefit plans, Tax (expense)/benefit | $ 6 | $ 16 | $ 19 | $ 49 | ||||||
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