Pension Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Net Pension Benefits Expense
Service cost benefits earned	$ 25	$ 23	$ 51	$ 46
Interest cost on projected benefit obligation	29	37	59	74
Expected return on assets	(60)	(62)	(121)	(124)
Amortization of losses	32	16	64	31
Amortization of prior service cost	(3)	(3)	(6)	(5)
Total	$ 23	$ 11	$ 47	$ 22