Operating Lease Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Leases [Abstract]
Operating lease equipment	$ 647		$ 647		$ 777
Accumulated depreciation	286		286		$ 290
Operating lease income	38	$ 39	116	$ 118
Depreciation expense	$ 31	$ 32	95	95
Operating lease payments received			118	119
Impairment losses of operating lease equipment			$ 25	$ 3