Segments (Operating Income by Reportable Segment and Reconciliation to Earnings Before Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 561	$ 395	$ 1,358	$ 1,042
Gain on sale of investments		1		1
Investment income and other	5	9	19	33
Interest expense	(11)	(16)	(43)	(50)
Earnings before income tax expense	555	389	1,334	1,026
Domestic Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	612	388	1,377	1,029
International Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (51)	$ 7	$ (19)	$ 13