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Related Parties (Schedule of Related Party Transactions) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Aug. 02, 2019	Jul. 31, 2020	Aug. 02, 2019	Jan. 31, 2020
Related Party Transaction [Line Items]
Unearned Revenue	$ 9,385		$ 9,385		$ 9,268
Dell
Related Party Transaction [Line Items]
Customer deposits	203		203		194
Dell \| Reseller revenue
Related Party Transaction [Line Items]
Revenue and Receipts	948	$ 778	1,810	$ 1,443
Unearned Revenue	4,204		4,204		3,787
Dell \| Internal-use revenue
Related Party Transaction [Line Items]
Revenue and Receipts	16	11	35	23
Unearned Revenue	33		33		$ 57
Dell \| Collaborative technology project receipts
Related Party Transaction [Line Items]
Revenue and Receipts	3	2	6	4
Dell \| Purchases and leases of products and purchases of services
Related Party Transaction [Line Items]
Related party costs	45	56	89	136
Dell \| Dell subsidiary support and administrative costs
Related Party Transaction [Line Items]
Related party costs	$ 15	$ 27	$ 42	$ 64