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SEGMENT REPORTING - Schedule of Segment Revenue and Net Before Tax Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	$ 986			$ 1,044	$ 2,941	$ 3,119
Revenues	2,924			3,035	8,760	8,923
Earnings from continuing operations before taxes	255			338	722	965
Non-operating pension costs, net	(10)			(3)	(30)	(8)
Other items impacting comparability, net	(4)			4	22	(21)
Earnings from continuing operations before income taxes	213			334	458	924
Supply Chain Solutions
Segment Reporting Information [Line Items]
Revenues	1,194			1,206	3,574	3,469
Impairment		$ 30	$ 20
Operating Segments \| Fleet Management Solutions
Segment Reporting Information [Line Items]
Revenues	1,487			1,582	4,449	4,732
Earnings from continuing operations before taxes	169			266	531	801
Operating Segments \| Fleet Management Solutions \| ChoiceLease
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	799			772	2,356	2,299
Operating Segments \| Fleet Management Solutions \| Commercial rental
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	293			349	898	991
Operating Segments \| Fleet Management Solutions \| SelectCare and other
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	174			159	528	460
Operating Segments \| Fleet Management Solutions \| FMS Europe
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	0			23	0	142
Operating Segments \| Fleet Management Solutions \| Fuel services revenue
Segment Reporting Information [Line Items]
Revenues	221			279	667	840
Operating Segments \| Supply Chain Solutions
Segment Reporting Information [Line Items]
Revenues	1,194			1,206	3,574	3,469
Earnings from continuing operations before taxes	81			71	174	176
Operating Segments \| Dedicated Transportation Solutions
Segment Reporting Information [Line Items]
Revenues	448			455	1,342	1,330
Earnings from continuing operations before taxes	28			28	90	72
Eliminations
Segment Reporting Information [Line Items]
Revenues	(205)			(208)	(605)	(608)
Earnings from continuing operations before taxes	(23)			(27)	(73)	(84)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated Central Support Services	(20)			(21)	(54)	(61)
Intangible amortization expense	(8)			(8)	(25)	(27)
Non-operating pension costs, net	(10)			(3)	(30)	(8)
Other items impacting comparability, net	$ (4)			$ 28	$ (155)	$ 55