|
Retirement Benefit Plans (Net Periodic Expense) (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
9 Months Ended |
|
Nov. 01, 2014
|
Nov. 02, 2013
|
Nov. 01, 2014
|
Nov. 02, 2013
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Net periodic benefit expense/(income) |
$ 1 |
$ 34 |
$ 4 |
$ 102 |
| Transfer of benefits |
25 |
|
|
|
|
Retirement Benefit Plans Total [Member]
|
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Service cost |
15 |
20 |
46 |
59 |
| Interest cost |
56 |
55 |
165 |
163 |
| Expected return on plan assets |
(87) |
(85) |
(261) |
(255) |
| Amortization of actuarial loss/(gain) |
16 |
43 |
49 |
131 |
| Amortization of prior service cost/(credit) |
(1) |
(1) |
(1) |
(2) |
| Loss/(gain) on transfer of benefits |
0 |
0 |
0 |
0 |
| Net periodic benefit expense/(income) |
(1) |
32 |
(2) |
96 |
|
Primary and Supplemental Pension Plan Total [Member]
|
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Service cost |
15 |
20 |
46 |
59 |
| Interest cost |
56 |
54 |
165 |
162 |
| Expected return on plan assets |
(87) |
(85) |
(261) |
(255) |
| Amortization of actuarial loss/(gain) |
16 |
44 |
49 |
132 |
| Amortization of prior service cost/(credit) |
1 |
1 |
5 |
4 |
| Loss/(gain) on transfer of benefits |
0 |
0 |
0 |
0 |
| Net periodic benefit expense/(income) |
1 |
34 |
4 |
102 |
|
Primary Pension Plan [Member]
|
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Service cost |
15 |
20 |
46 |
59 |
| Interest cost |
53 |
51 |
158 |
153 |
| Expected return on plan assets |
(87) |
(85) |
(261) |
(255) |
| Amortization of actuarial loss/(gain) |
13 |
38 |
38 |
114 |
| Amortization of prior service cost/(credit) |
1 |
1 |
5 |
4 |
| Loss/(gain) on transfer of benefits |
6 |
0 |
6 |
0 |
| Net periodic benefit expense/(income) |
1 |
25 |
(8) |
75 |
|
Supplemental Pension Plans [Member]
|
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Service cost |
0 |
0 |
0 |
0 |
| Interest cost |
3 |
3 |
7 |
9 |
| Amortization of actuarial loss/(gain) |
3 |
6 |
11 |
18 |
| Amortization of prior service cost/(credit) |
0 |
0 |
0 |
0 |
| Loss/(gain) on transfer of benefits |
(6) |
0 |
(6) |
0 |
| Net periodic benefit expense/(income) |
0 |
9 |
12 |
27 |
|
Postretirement Health and Welfare Plan [Member]
|
|
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
|
| Service cost |
0 |
0 |
0 |
0 |
| Interest cost |
0 |
1 |
0 |
1 |
| Amortization of actuarial loss/(gain) |
0 |
(1) |
0 |
(1) |
| Amortization of prior service cost/(credit) |
(2) |
(2) |
(6) |
(6) |
| Net periodic benefit expense/(income) |
$ (2) |
$ (2) |
$ (6) |
$ (6) |