Operating Lease Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Leases [Abstract]
Operating lease equipment	$ 715		$ 715		$ 777
Accumulated depreciation	298		298		$ 290
Operating lease income	39	$ 39	78	$ 78
Depreciation expense	$ 31	$ 31	64	63
Operating lease payments received			80	80
Impairment losses of operating lease equipment			$ 25	$ 3