|
Retirement Benefit Plans (Level 3 Investment Assets) (Details) (USD $)
In Millions, unless otherwise specified
|
12 Months Ended |
|
Feb. 02, 2013
|
Jan. 28, 2012
|
|
Corporate bonds [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance, beginning of year |
$ 9 |
$ 1 |
| Transfers, net |
|
9 |
| Realized gains |
(1) |
|
| Unrealized gains/(losses) |
|
(1) |
| Purchases and issuances |
6 |
3 |
| Sales, maturities and settlements |
(4) |
(3) |
| Balance, end of year |
10 |
9 |
|
Corporate loans [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance, beginning of year |
27 |
3 |
| Transfers, net |
|
2 |
| Realized gains |
(1) |
|
| Purchases and issuances |
3 |
30 |
| Sales, maturities and settlements |
(17) |
(8) |
| Balance, end of year |
12 |
27 |
|
Private Equity Funds [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance, beginning of year |
299 |
291 |
| Realized gains |
33 |
33 |
| Unrealized gains/(losses) |
(5) |
(17) |
| Purchases and issuances |
47 |
53 |
| Sales, maturities and settlements |
(77) |
(61) |
| Balance, end of year |
297 |
299 |
|
Private real estate [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance, beginning of year |
255 |
251 |
| Transfers, net |
3 |
|
| Realized gains |
|
10 |
| Unrealized gains/(losses) |
7 |
24 |
| Purchases and issuances |
6 |
12 |
| Sales, maturities and settlements |
(40) |
(42) |
| Balance, end of year |
$ 231 |
$ 255 |