Leases - Components of Equipment Leasing Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Sales-type and direct financing leases
Interest income on lease receivable	$ 36	$ 31	$ 91	$ 92
Interest income related to accretion of unguaranteed residual asset	(7)	3	(1)	9
Interest income on deferred fees and costs	0	0	0	0
Total sales-type and direct financing lease income	29	34	90	101
Operating leases
Operating lease income related to lease payments	34	34	103	100
Other operating leasing gains	4	8	25	23
Total operating lease income and other leasing gains	38	42	128	123
Total lease income	$ 67	$ 76	$ 218	$ 224