Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
May 05, 2018 |
Apr. 29, 2017 |
|
| Retirement Benefits Disclosure [Line Items] | ||
| Expense related to the qualified plan | $ 18 | $ 16 |
| Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member] | ||
| Retirement Benefits Disclosure [Line Items] | ||
| Expense related to non-qualified plan | $ 6 | $ 4 |