Pension (Net Benefit Expense (Income)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Retirement Plans and Other Benefits [Abstract]
Service cost	$ 4	$ 3	$ 8	$ 7
Interest cost	5	6	9	11
Expected return on plan assets	(8)	(10)	(17)	(19)
Amortization of net loss (gain)	2	3	5	6
Net benefit expense (income)	$ 3	$ 2	$ 5	$ 5