SEGMENT INFORMATION - Reconciliation of net revenue by reportable segments to consolidated net revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2020	Aug. 02, 2019	Jul. 31, 2020	Aug. 02, 2019	Jan. 31, 2020	Feb. 01, 2019
Segment Reporting Information [Line Items]
Total net revenue	$ 22,733	$ 23,370	$ 44,630	$ 45,278
Consolidated operating income (loss)	1,136	519	1,838	1,069
Amortization of intangibles	(800)	(1,100)	(1,700)	(2,300)
Other businesses | Virtustream
Segment Reporting Information [Line Items]
Impairments		619		619	$ 619	$ 190
Operating segments
Segment Reporting Information [Line Items]
Total net revenue	22,318	23,020	43,746	44,589
Consolidated operating income (loss)	2,582	2,783	4,679	5,014
Operating segments | Infrastructure Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	8,207	8,621	15,776	16,823
Consolidated operating income (loss)	973	1,050	1,705	1,893
Operating segments | Client Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	11,203	11,748	22,307	22,658
Consolidated operating income (loss)	715	982	1,307	1,775
Operating segments | VMware
Segment Reporting Information [Line Items]
Total net revenue	2,908	2,651	5,663	5,108
Consolidated operating income (loss)	894	751	1,667	1,346
Operating segments | Other businesses
Segment Reporting Information [Line Items]
Total net revenue	457	434	974	855
Consolidated operating income (loss)	37	(14)	102	(48)
Unallocated transactions
Segment Reporting Information [Line Items]
Consolidated operating income (loss)	(1)	(26)	(2)	(27)
Other corporate expenses	(86)	(714)	(181)	(737)
Reconciling items
Segment Reporting Information [Line Items]
Total net revenue	(42)	(84)	(90)	(166)
Impact of purchase accounting	(53)	(102)	(116)	(203)
Amortization of intangibles	(847)	(1,060)	(1,702)	(2,277)
Transaction-related expenses	(83)	(47)	(159)	(89)
Stock-based compensation expense	$ (413)	$ (301)	$ (783)	$ (564)