FINANCIAL SERVICES - Credit Quality (Details) - USD ($) $ in Millions	Oct. 28, 2016	Jan. 29, 2016
Revolving | Dell Preferred Account (DPA)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	$ 808	$ 947
Revolving | Dell Business Credit (DBC)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	200	226
Fixed-term | Consumer and Small Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	357	329
Fixed-term | Medium and Large Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	3,759	3,308
Higher | Revolving | Dell Preferred Account (DPA)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	131	148
Higher | Revolving | Dell Business Credit (DBC)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	58	68
Higher | Fixed-term | Consumer and Small Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	111	93
Higher | Fixed-term | Medium and Large Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	1,811	1,597
Mid | Revolving | Dell Preferred Account (DPA)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	248	270
Mid | Revolving | Dell Business Credit (DBC)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	59	65
Mid | Fixed-term | Consumer and Small Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	144	136
Mid | Fixed-term | Medium and Large Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	1,205	1,075
Lower | Revolving | Dell Preferred Account (DPA)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	429	529
Lower | Revolving | Dell Business Credit (DBC)
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	83	93
Lower | Fixed-term | Consumer and Small Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	102	100
Lower | Fixed-term | Medium and Large Commercial
Financing Receivable, Recorded Investment [Line Items]
Customer receivables, gross	$ 743	$ 636