Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details) - USD ($)
$ in Millions |
Feb. 02, 2019 |
Feb. 03, 2018 |
| Supplemental Employee Retirement Plan [Member] |
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
| Net loss/(gain) |
$ 9
|
|
$ 18
|
| Prior service cost/(credit) |
(3)
|
|
(3)
|
| Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total |
6
|
|
15
|
| Pension Plan [Member] |
|
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
|
| Net loss/(gain) |
129
|
|
169
|
| Prior service cost/(credit) |
30
|
|
37
|
| Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total |
159
|
[1] |
$ 206
|
| Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year |
$ 7
|
|
|
|
|