SEGMENT REPORTING - Summary of Segment Revenue and Net Before Tax Information by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue:
Lease & related maintenance and rental revenues	$ 4,174	$ 3,995	$ 3,704
Revenues	12,011	9,663	8,420
Earnings before tax, before reconciling items	1,227	751	48
Non-operating pension costs, net	(11)	1	(11)
Other items impacting comparability, net	(2)	(32)	(111)
Earnings (loss) from continuing operations before income taxes	1,216	693	(130)
SCS
Revenue:
Revenues	4,720	3,155	2,544
Operating Segments | FMS
Revenue:
Revenues	6,327	5,680	5,171
Earnings before tax, before reconciling items	1,054	663	(142)
Operating Segments | FMS | ChoiceLease
Revenue:
Lease & related maintenance and rental revenues	3,203	3,220	3,160
Operating Segments | FMS | Commercial rental
Revenue:
Lease & related maintenance and rental revenues	1,351	1,114	834
Operating Segments | FMS | SelectCare and other
Revenue:
Lease & related maintenance and rental revenues	659	607	584
Operating Segments | FMS | Fuel services and ChoiceLease liability insurance revenue
Revenue:
Revenues	1,114	739	593
Operating Segments | SCS
Revenue:
Revenues	4,720	3,155	2,544
Earnings before tax, before reconciling items	186	117	160
Operating Segments | DTS
Revenue:
Revenues	1,786	1,457	1,229
Earnings before tax, before reconciling items	102	49	73
Eliminations
Revenue:
Revenues	(822)	(629)	(524)
Earnings before tax, before reconciling items	(115)	(78)	(43)
Segment Reconciling Items
Revenue:
Unallocated Central Support Services	(83)	(69)	(77)
Non-operating pension costs, net	(11)	1	(11)
Other items impacting comparability, net	$ 83	$ 10	$ (90)