Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Retirement Benefits Disclosure [Line Items]
Expense related to the qualified plan	$ 19	$ 18	$ 58	$ 56
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Retirement Benefits Disclosure [Line Items]
Expense related to non-qualified plan	$ 8	$ 7	$ 20	$ 18