FINANCIAL SERVICES - Operating Leases (Details) - USD ($) $ in Millions	May 01, 2020	Jan. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equipment under operating lease, net	$ 6,100	$ 6,055
Assets Leased to Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equipment under operating lease, gross	1,150	956
Less: accumulated depreciation	(175)	(116)
Equipment under operating lease, net	$ 975	$ 840

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