Restructuring Charges (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Aug. 03, 2019	Oct. 31, 2020	Nov. 02, 2019
Restructuring Cost and Reserve [Line Items]
Revenue	$ 11,853	$ 9,764		$ 30,325	$ 28,442
Operating income	561	395		1,358	1,042
Restructuring charges	111	$ (7)		112	$ 41
Mexico Exit And Corporate Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				148
Restructuring Reserve	47			47
Mexico Exit And Corporate Reorganization [Member] | Domestic [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	7			7
Voluntary Early Retirement [Member] | U.S. Operating Model [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 10
Cumulative Amount	41			41
Minimum [Member] | Mexico Exit And Corporate Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Expected charges	50			50
Maximum [Member] | Mexico Exit And Corporate Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Expected charges	$ 75			$ 75