Pension Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Net Pension Benefits Expense
Service cost benefits earned	$ 25	$ 23	$ 76	$ 69
Interest cost on projected benefit obligation	30	37	89	111
Expected return on assets	(61)	(62)	(182)	(186)
Amortization of losses	32	16	96	47
Amortization of prior service cost	(3)	(3)	(9)	(8)
Settlement charges	1	0	1	0
Total	$ 24	$ 11	$ 71	$ 33