FINANCIAL SERVICES - Variable Interest Entities Narrative (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
Debt Instrument [Line Items]
Total debt, principal amount	$ 54,537		$ 54,537		$ 52,665
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Financing receivables transferred via securitization through SPEs	1,200	$ 1,300	3,000	$ 2,800
Total debt, principal amount	$ 6,600		$ 6,600		$ 5,900