Leases - Components of Equipment Leasing Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Sales-type and direct financing leases
Interest income on lease receivable	$ 23	$ 27	$ 46	$ 55
Interest income related to accretion of unguaranteed residual asset	1	3	3	6
Total sales-type and direct financing lease income	24	30	49	61
Operating leases
Operating lease income related to lease payments	32	35	64	69
Other operating leasing gains	4	25	10	21
Total operating lease income and other leasing gains	36	60	74	90
Total lease income	$ 60	$ 90	$ 123	$ 151