|
Retirement Benefit Plans (Net Periodic Expense) (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
9 Months Ended |
|
Nov. 02, 2013
|
Oct. 27, 2012
|
Nov. 02, 2013
|
Oct. 27, 2012
|
| Net periodic benefit expense/(income) |
$ 34 |
$ 51 |
$ 102 |
$ 167 |
|
Retirement Benefit Plans Total [Member]
|
|
|
|
|
| Service cost |
20 |
21 |
59 |
68 |
| Interest cost |
55 |
64 |
163 |
196 |
| Expected return on plan assets |
(85) |
(95) |
(255) |
(284) |
| Amortization of actuarial loss/(gain) |
43 |
61 |
131 |
188 |
| Amortization of prior service cost/(credit) |
(1) |
(4) |
(2) |
(11) |
| Net periodic benefit expense/(income) |
32 |
47 |
96 |
157 |
|
Primary and Supplemental Pension Plan Total [Member]
|
|
|
|
|
| Service cost |
20 |
21 |
59 |
68 |
| Interest cost |
54 |
64 |
162 |
195 |
| Expected return on plan assets |
(85) |
(95) |
(255) |
(284) |
| Amortization of actuarial loss/(gain) |
44 |
61 |
132 |
188 |
| Amortization of prior service cost/(credit) |
1 |
0 |
4 |
0 |
| Net periodic benefit expense/(income) |
34 |
51 |
102 |
167 |
|
Primary Pension Plan [Member]
|
|
|
|
|
| Service cost |
20 |
21 |
59 |
67 |
| Interest cost |
51 |
61 |
153 |
185 |
| Expected return on plan assets |
(85) |
(95) |
(255) |
(284) |
| Amortization of actuarial loss/(gain) |
38 |
55 |
114 |
171 |
| Amortization of prior service cost/(credit) |
1 |
0 |
4 |
0 |
| Net periodic benefit expense/(income) |
25 |
42 |
75 |
139 |
|
Supplemental Pension Plans [Member]
|
|
|
|
|
| Service cost |
0 |
0 |
0 |
1 |
| Interest cost |
3 |
3 |
9 |
10 |
| Amortization of actuarial loss/(gain) |
6 |
6 |
18 |
17 |
| Amortization of prior service cost/(credit) |
0 |
0 |
0 |
0 |
| Net periodic benefit expense/(income) |
9 |
9 |
27 |
28 |
|
Postretirement Health and Welfare Plan [Member]
|
|
|
|
|
| Service cost |
0 |
0 |
0 |
0 |
| Interest cost |
1 |
0 |
1 |
1 |
| Amortization of actuarial loss/(gain) |
(1) |
0 |
(1) |
0 |
| Amortization of prior service cost/(credit) |
(2) |
(4) |
(6) |
(11) |
| Net periodic benefit expense/(income) |
$ (2) |
$ (4) |
$ (6) |
$ (10) |