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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