|
Retirement Benefit Plans (Net Periodic Expense) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Apr. 28, 2012
|
Apr. 30, 2011
|
|
| Service cost | $ 23 | $ 23 |
| Interest cost | 65 | 65 |
| Expected return on assets | (94) | (96) |
| Net amortization | 64 | 37 |
| Net periodic plan expense/(income) | 58 | 29 |
|
Benefits Plan Primary Plan [Member]
|
||
| Service cost | 23 | 22 |
| Interest cost | 62 | 62 |
| Expected return on assets | (94) | (96) |
| Net amortization | 58 | 34 |
| Net periodic plan expense/(income) | 49 | 22 |
|
Benefits Supplemental Plan [Member]
|
||
| Service cost | 1 | |
| Interest cost | 3 | 3 |
| Net amortization | 6 | 3 |
| Net periodic plan expense/(income) | 9 | 7 |
|
Postretirement Health and Welfare Plan [Member]
|
||
| Service cost | ||
| Interest cost | ||
| Expected return on assets | ||
| Net amortization | (4) | (6) |
| Net periodic plan expense/(income) | $ (4) | $ (6) |