Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Retirement Benefits Disclosure [Line Items]
Expense related to the qualified plan	$ 18	$ 20	$ 39	$ 39
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Retirement Benefits Disclosure [Line Items]
Liability, Other Retirement Benefits	258		258
Expense related to non-qualified plan	$ 3	$ 6	$ 9	$ 12