FINANCING RECEIVABLES AND ALLOWANCES - Net Investment in Financing Leases (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Total Financing Leases
Total minimum lease payments receivable	$ 1,202	$ 1,628
Less principal and interest on third-party non-recourse debt	(83)	(216)
Net minimum lease payments receivable	1,119	1,412
Less deferred income	(133)	(178)
Discounted lease receivable	986	1,234
Estimated unguaranteed residual value of leased assets, net of deferred income	819	835
Investment in financing leases, net of deferred income	1,805	2,070
Direct financing and sales type leases
Total minimum lease payments receivable	654	799
Less deferred income	(99)	(139)
Discounted lease receivable	556	660
Estimated unguaranteed residual value of leased assets, net of deferred income	472	412
Investment in financing leases, net of deferred income	1,028	1,072
Leveraged leases
Total minimum lease payments receivable	548	829
Less principal and interest on third-party non-recourse debt	(83)	(216)
Net minimum lease payments receivable	465	613
Less deferred income	(34)	(39)
Discounted lease receivable	431	574
Estimated unguaranteed residual value of leased assets, net of deferred income	347	423
Investment in financing leases, net of deferred income	777	997
Investment in sales type leases	$ 506	$ 506