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SEGMENT REPORTING - Schedule of Segment Revenue and Net Before Tax Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	$ 976			$ 1,050	$ 1,955	$ 2,075
Revenues	2,884			3,034	5,836	5,888
Earnings from continuing operations before taxes	265			341	468	627
Non-operating pension costs, net	(10)			(2)	(20)	(5)
Other items impacting comparability, net	1			(11)	26	(25)
Earnings from continuing operations before income taxes	44			338	245	590
Supply Chain Solutions
Segment Reporting Information [Line Items]
Revenues	1,179			1,174	2,380	2,263
Impairment		$ 30	$ 20
Operating Segments \| Fleet Management Solutions
Segment Reporting Information [Line Items]
Revenues	1,459			1,621	2,962	3,150
Earnings from continuing operations before taxes	180			286	362	535
Operating Segments \| Fleet Management Solutions \| ChoiceLease
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	781			763	1,557	1,527
Operating Segments \| Fleet Management Solutions \| Commercial rental
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	301			336	605	642
Operating Segments \| Fleet Management Solutions \| SelectCare and other
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	172			153	354	301
Operating Segments \| Fleet Management Solutions \| FMS Europe
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	0			55	0	119
Operating Segments \| Fleet Management Solutions \| Fuel services revenue
Segment Reporting Information [Line Items]
Revenues	205			314	446	561
Operating Segments \| Supply Chain Solutions
Segment Reporting Information [Line Items]
Revenues	1,179			1,174	2,380	2,263
Earnings from continuing operations before taxes	76			62	93	105
Operating Segments \| Dedicated Transportation Solutions
Segment Reporting Information [Line Items]
Revenues	440			450	894	875
Earnings from continuing operations before taxes	33			23	62	43
Eliminations
Segment Reporting Information [Line Items]
Revenues	(194)			(211)	(400)	(400)
Earnings from continuing operations before taxes	(24)			(30)	(49)	(56)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated Central Support Services	(20)			(24)	(35)	(40)
Intangible amortization expense	(8)			(9)	(17)	(19)
Non-operating pension costs, net	(10)			(2)	(20)	(5)
Other items impacting comparability, net	$ (183)			$ 32	$ (151)	$ 27