FINANCIAL SERVICES - Aging (Details) - USD ($) $ in Millions	Oct. 28, 2016	Jan. 29, 2016
Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 4,777	$ 4,460
Total customer receivables, gross	5,124	4,810
Revolving | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	1,008	1,173
Revolving | Dell Preferred Account (DPA)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	808	947
Revolving | Dell Preferred Account (DPA) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	696	812
Total customer receivables, gross	808	947
Revolving | Dell Business Credit (DBC)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	200	226
Revolving | Dell Business Credit (DBC) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	178	202
Total customer receivables, gross	200	226
Fixed-term | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	4,116	3,637
Fixed-term | Consumer and Small Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	357	329
Fixed-term | Consumer and Small Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	339	315
Total customer receivables, gross	357	329
Fixed-term | Medium and Large Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total customer receivables, gross	3,759	3,308
Fixed-term | Medium and Large Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,564	3,131
Total customer receivables, gross	3,759	3,308
Past Due 1 — 90 Days | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	296	303
Past Due 1 — 90 Days | Revolving | Dell Preferred Account (DPA) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	84	99
Past Due 1 — 90 Days | Revolving | Dell Business Credit (DBC) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	17	20
Past Due 1 — 90 Days | Fixed-term | Consumer and Small Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	16	13
Past Due 1 — 90 Days | Fixed-term | Medium and Large Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	179	171
Past Due 90 Days | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	51	47
Past Due 90 Days | Revolving | Dell Preferred Account (DPA) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	28	36
Past Due 90 Days | Revolving | Dell Business Credit (DBC) | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	5	4
Past Due 90 Days | Fixed-term | Consumer and Small Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2	1
Past Due 90 Days | Fixed-term | Medium and Large Commercial | Customer receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 16	$ 6