Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Retirement Benefits Disclosure [Line Items]
Expense related to the qualified plan	$ 16	$ 19	$ 55	$ 58
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	$ 8	$ 11	$ 20