Revenue, Unearned Revenue and Remaining Performance Obligations (Summary of Unearned Revenue) (Details) - USD ($) $ in Millions	Oct. 30, 2020	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Unearned Revenue	$ 9,235	$ 9,268
Unearned license revenue
Disaggregation of Revenue [Line Items]
Unearned Revenue	11	19
Subscription and SaaS
Disaggregation of Revenue [Line Items]
Unearned Revenue	1,596	1,534
Unearned software maintenance revenue
Disaggregation of Revenue [Line Items]
Unearned Revenue	6,574	6,700
Unearned professional services revenue
Disaggregation of Revenue [Line Items]
Unearned Revenue	$ 1,054	$ 1,015

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant