Pension Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Net Pension Benefits Expense
Service cost benefits earned	$ 24	$ 25	$ 48	$ 51
Interest cost on projected benefit obligation	24	29	48	59
Expected return on assets	(59)	(60)	(118)	(121)
Amortization of losses	28	32	57	64
Amortization of prior service cost	(1)	(3)	(1)	(6)
Total	$ 16	$ 23	$ 34	$ 47