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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	$ 960	$ 986	$ 2,844	$ 2,941
Total revenue	3,168	2,924	9,447	8,760
Earnings from continuing operations before taxes	227	255	601	722
Non-operating pension costs, net	(10)	(10)	(31)	(30)
Other items impacting comparability, net	(1)	(4)	(5)	22
Earnings from continuing operations before income taxes	188	213	480	458
Supply Chain Solutions
Segment Reporting Information [Line Items]
Total revenue	1,317	1,194	3,960	3,574
Operating Segments \| Fleet Management Solutions
Segment Reporting Information [Line Items]
Total revenue	1,470	1,487	4,403	4,449
Earnings from continuing operations before taxes	132	169	365	531
Operating Segments \| Fleet Management Solutions \| ChoiceLease
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	857	799	2,556	2,356
Operating Segments \| Fleet Management Solutions \| Commercial rental
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	251	293	726	898
Operating Segments \| Fleet Management Solutions \| SelectCare and other
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenue	173	174	526	528
Operating Segments \| Fleet Management Solutions \| Fuel services revenue
Segment Reporting Information [Line Items]
Total revenue	189	221	595	667
Operating Segments \| Supply Chain Solutions
Segment Reporting Information [Line Items]
Total revenue	1,317	1,194	3,960	3,574
Earnings from continuing operations before taxes	93	81	242	174
Operating Segments \| Dedicated Transportation Solutions
Segment Reporting Information [Line Items]
Total revenue	633	448	1,831	1,342
Earnings from continuing operations before taxes	36	28	91	90
Eliminations
Segment Reporting Information [Line Items]
Total revenue	(252)	(205)	(747)	(605)
Earnings from continuing operations before taxes	(34)	(23)	(97)	(73)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated Central Support Services	(17)	(20)	(52)	(54)
Intangible amortization expense	(11)	(8)	(33)	(25)
Non-operating pension costs, net	(10)	(10)	(31)	(30)
Other items impacting comparability, net	$ (1)	$ (4)	$ (5)	$ (155)

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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