FINANCIAL SERVICES - Aging Customer Financing Receivables, Gross, Including Accrued Interest (Details) - USD ($)
$ in Millions
Apr. 30, 2021
Jan. 29, 2021
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross $ 10,190 $ 10,391
Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 10,190 10,391
Revolving | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 752 796
Revolving | Revolving — DPA | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 580 621
Revolving | Revolving — DBC | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 172 175
Fixed-term | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 9,438 9,595
Fixed-term | Fixed-term — Consumer and Commercial | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 9,438 9,595
Current | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 9,742 9,927
Current | Revolving | Revolving — DPA | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 549 578
Current | Revolving | Revolving — DBC | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 158 157
Current | Fixed-term | Fixed-term — Consumer and Commercial | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 9,035 9,192
Past Due 1 — 90 Days | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 378 360
Past Due 1 — 90 Days | Revolving | Revolving — DPA | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 21 30
Past Due 1 — 90 Days | Revolving | Revolving — DBC | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 11 14
Past Due 1 — 90 Days | Fixed-term | Fixed-term — Consumer and Commercial | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 346 316
Past Due >90 Days | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 70 104
Past Due >90 Days | Revolving | Revolving — DPA | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 10 13
Past Due >90 Days | Revolving | Revolving — DBC | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross 3 4
Past Due >90 Days | Fixed-term | Fixed-term — Consumer and Commercial | Customer receivables    
Financing Receivable, Past Due [Line Items]    
Total customer receivables, gross $ 57 $ 87