FINANCIAL SERVICES - Financing Receivables Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 28, 2016	Oct. 30, 2015	Oct. 28, 2016	Oct. 30, 2015	Jan. 29, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
New financing originations	$ 1,100	$ 900	$ 3,000	$ 2,800
Financing receivable, net	5,439		5,439		$ 5,092
Revolving
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	913		$ 913		1,055
Repayment term (in years)			12 months
Fixed-term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	4,526		$ 4,526		4,037
Future maturities
Fiscal 2017	505		505
Fiscal 2018	1,462		1,462
Fiscal 2019	883		883
Fiscal 2020	331		331
Fiscal 2021	74		$ 74
Fixed-term | Business customers | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment term (in years)			2 years
Fixed-term | Business customers | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment term (in years)			4 years
Fixed-term | Qualified small businesses, large commercial accounts, governmental organizations, educational entities, and certain individual consumer customers | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment term (in years)			3 years
Fixed-term | Qualified small businesses, large commercial accounts, governmental organizations, educational entities, and certain individual consumer customers | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment term (in years)			5 years
Customer receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	4,978		$ 4,978		4,634
Customer receivables | Revolving
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	913		913		1,055
Customer receivables | Fixed-term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, net	$ 4,065		$ 4,065		$ 3,579