|
Retirement Benefit Plans (Net Periodic Expense) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Aug. 03, 2013
|
Jul. 28, 2012
|
Aug. 03, 2013
|
Jul. 28, 2012
|
|
| Net periodic plan expense/(income) | $ 34 | $ 58 | $ 68 | $ 116 |
|
Retirement Benefit Plans Total [Member]
|
||||
| Service cost | 19 | 24 | 39 | 47 |
| Interest cost | 54 | 67 | 108 | 132 |
| Expected return on plan assets | (85) | (95) | (170) | (189) |
| Amortization of acruarial loss/(gain) | 44 | 63 | 88 | 127 |
| Amortization of prior service cost/(credit) | (3) | (1) | (7) | |
| Net periodic plan expense/(income) | 32 | 56 | 64 | 110 |
|
Primary and Supplemental Pension Plan Total [Member]
|
||||
| Service cost | 19 | 24 | 39 | 47 |
| Interest cost | 54 | 66 | 108 | 131 |
| Expected return on plan assets | (85) | (95) | (170) | (189) |
| Amortization of acruarial loss/(gain) | 44 | 63 | 88 | 127 |
| Amortization of prior service cost/(credit) | 2 | 3 | ||
| Net periodic plan expense/(income) | 34 | 58 | 68 | 116 |
|
Primary Pension Plan [Member]
|
||||
| Service cost | 19 | 23 | 39 | 46 |
| Interest cost | 51 | 62 | 102 | 124 |
| Expected return on plan assets | (85) | (95) | (170) | (189) |
| Amortization of acruarial loss/(gain) | 38 | 58 | 76 | 116 |
| Amortization of prior service cost/(credit) | 2 | 3 | ||
| Net periodic plan expense/(income) | 25 | 48 | 50 | 97 |
|
Supplemental Pension Plans [Member]
|
||||
| Service cost | 1 | 1 | ||
| Interest cost | 3 | 4 | 6 | 7 |
| Amortization of acruarial loss/(gain) | 6 | 5 | 12 | 11 |
| Net periodic plan expense/(income) | 9 | 10 | 18 | 19 |
|
Postretirement Health and Welfare Plan [Member]
|
||||
| Interest cost | 1 | 1 | ||
| Amortization of prior service cost/(credit) | (2) | (3) | (4) | (7) |
| Net periodic plan expense/(income) | $ (2) | $ (2) | $ (4) | $ (6) |