GOODWILL AND OTHER INTANGIBLES - Schedule of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1		$ 3,436	$ 3,436	$ 3,515
Accumulated impairment losses, January 1		(1,079)	(1,079)	(502)
Goodwill, beginning balance		2,357	2,357	3,013
Impairment		(13)	(423)	(577)
Measurement period adjustments				6
Other, primarily translation adjustment			121	(85)
Gross goodwill balance, December 31	$ 3,557		3,557	3,436
Accumulated impairment losses, December 31	(1,502)		(1,502)	(1,079)
Goodwill, ending balance	2,055		2,055	2,357
Turbos & Thermal Technologies
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1		1,235	1,235	1,257
Accumulated impairment losses, January 1		(502)	(502)	(502)
Goodwill, beginning balance		733	733	755
Impairment			0	0
Measurement period adjustments				0
Other, primarily translation adjustment			44	(22)
Gross goodwill balance, December 31	1,279		1,279	1,235
Accumulated impairment losses, December 31	(502)		(502)	(502)
Goodwill, ending balance	777		777	733
Drivetrain & Morse Systems
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1		1,120	1,120	1,126
Accumulated impairment losses, January 1		0	0	0
Goodwill, beginning balance		1,120	1,120	1,126
Impairment			0	0
Measurement period adjustments				0
Other, primarily translation adjustment			12	(6)
Gross goodwill balance, December 31	1,132		1,132	1,120
Accumulated impairment losses, December 31	0		0	0
Goodwill, ending balance	1,132		1,132	1,120
PowerDrive Systems
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1		468	468	481
Accumulated impairment losses, January 1		(468)	(468)	0
Goodwill, beginning balance		0	0	481
Impairment	0			(468)
Measurement period adjustments				6
Other, primarily translation adjustment			0	(19)
Gross goodwill balance, December 31	468		468	468
Accumulated impairment losses, December 31	(468)		(468)	(468)
Goodwill, ending balance	0		0	0
Battery & Charging Systems
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1		613	613	651
Accumulated impairment losses, January 1		(109)	(109)	0
Goodwill, beginning balance		$ 504	504	651
Impairment	(410)		(423)	(109)
Measurement period adjustments				0
Other, primarily translation adjustment			65	(38)
Gross goodwill balance, December 31	678		678	613
Accumulated impairment losses, December 31	(532)		(532)	(109)
Goodwill, ending balance	$ 146		$ 146	$ 504

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