Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income/ (Loss) (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Oct. 31, 2015 |
Nov. 01, 2014 |
Oct. 31, 2015 |
Nov. 01, 2014 |
| 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 |
|
$ 29
|
$ 16
|
$ 87
|
$ 49
|
| Total, net of tax |
|
12
|
9
|
41
|
29
|
| Reclassification out of Accumulated Other Comprehensive Income [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Total reclassifications |
|
19
|
9
|
55
|
29
|
| Reclassification out of Accumulated Other Comprehensive Income [Member] | Total Amortization Of Retirement Benefit Plans, Net Of Tax [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Total, net of tax |
|
19
|
9
|
55
|
29
|
| Reclassification out of Accumulated Other Comprehensive Income [Member] | SG&A [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Amortization of retirement benefit plans, Prior service cost/(credit) |
[1] |
(2)
|
(2)
|
(6)
|
(6)
|
| Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Expense [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net |
|
0
|
0
|
2
|
0
|
| Reclassification out of Accumulated Other Comprehensive Income [Member] | Income Tax (Expense)/Benefit [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Amortization of retirement benefit plans, Tax (expense)/benefit |
|
10
|
6
|
34
|
19
|
| Pension [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Amortization of retirement benefit plans, Actuarial loss/(gain) |
|
(29)
|
(16)
|
(87)
|
(49)
|
| Amortization of retirement benefit plans, Prior service cost/(credit) |
|
(2)
|
(1)
|
(6)
|
(5)
|
| Pension [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |
|
|
|
|
|
| Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
|
| Amortization of retirement benefit plans, Actuarial loss/(gain) |
[1] |
29
|
16
|
87
|
49
|
| Amortization of retirement benefit plans, Prior service cost/(credit) |
[1] |
$ 2
|
$ 1
|
$ 6
|
$ 5
|
|
|