Leases - Components of Equipment Leasing Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Sales-type and direct financing leases
Interest income on lease receivable	$ 13	$ 36	$ 59	$ 91
Interest income related to accretion of unguaranteed residual asset	9	(7)	12	(1)
Total sales-type and direct financing lease income	22	29	71	90
Operating leases
Operating lease income related to lease payments	31	34	95	103
Other operating leasing gains	6	4	16	25
Total operating lease income and other leasing gains	36	38	111	128
Total lease income	$ 58	$ 67	$ 182	$ 218