REPORTABLE SEGMENTS - Schedule of Net sales and expenses by reporting segments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information
Net sales	$ 3,533	$ 3,515
Cost of sales	2,856	2,876
Selling, general and administrative expenses - R&D, net	328	315
Segment Adjusted Operating Income (Loss)	336	237
Net sales - customers
Segment Reporting Information
Net sales	3,533	3,515
Net sales - inter-segment
Segment Reporting Information
Net sales	0	0
Operating segments
Segment Reporting Information
Segment Adjusted Operating Income (Loss)	436	413
Inter-segment eliminations
Segment Reporting Information
Net sales	(11)	(11)
Inter-segment eliminations \| Net sales - customers
Segment Reporting Information
Net sales	0	0
Inter-segment eliminations \| Net sales - inter-segment
Segment Reporting Information
Net sales	(11)	(11)
Turbos & Thermal Technologies
Segment Reporting Information
Net sales	1,432	1,454
Turbos & Thermal Technologies \| Operating segments
Segment Reporting Information
Net sales	1,433	1,454
Cost of sales	1,146	1,151
Selling, general and administrative expenses - R&D, net	43	41
Selling, general and administrative expenses - Other	30	27
Other segment items	0	0
Segment Adjusted Operating Income (Loss)	214	235
Turbos & Thermal Technologies \| Operating segments \| Net sales - customers
Segment Reporting Information
Net sales	1,432	1,454
Turbos & Thermal Technologies \| Operating segments \| Net sales - inter-segment
Segment Reporting Information
Net sales	1	0
Drivetrain & Morse Systems
Segment Reporting Information
Net sales	1,418	1,356
Drivetrain & Morse Systems \| Operating segments
Segment Reporting Information
Net sales	1,422	1,361
Cost of sales	1,119	1,079
Selling, general and administrative expenses - R&D, net	33	29
Selling, general and administrative expenses - Other	11	10
Other segment items	(1)	0
Segment Adjusted Operating Income (Loss)	260	243
Drivetrain & Morse Systems \| Operating segments \| Net sales - customers
Segment Reporting Information
Net sales	1,418	1,356
Drivetrain & Morse Systems \| Operating segments \| Net sales - inter-segment
Segment Reporting Information
Net sales	4	5
PowerDrive Systems
Segment Reporting Information
Net sales	581	555
PowerDrive Systems \| Operating segments
Segment Reporting Information
Net sales	587	561
Cost of sales	513	492
Selling, general and administrative expenses - R&D, net	90	99
Selling, general and administrative expenses - Other	24	14
Other segment items	(4)	(1)
Segment Adjusted Operating Income (Loss)	(36)	(43)
PowerDrive Systems \| Operating segments \| Net sales - customers
Segment Reporting Information
Net sales	581	555
PowerDrive Systems \| Operating segments \| Net sales - inter-segment
Segment Reporting Information
Net sales	6	6
Battery Energy Systems
Segment Reporting Information
Net sales	102	150
Battery Energy Systems \| Operating segments
Segment Reporting Information
Net sales	102	150
Cost of sales	88	150
Selling, general and administrative expenses - R&D, net	9	11
Selling, general and administrative expenses - Other	7	11
Other segment items	0	0
Segment Adjusted Operating Income (Loss)	(2)	(22)
Battery Energy Systems \| Operating segments \| Net sales - customers
Segment Reporting Information
Net sales	102	150
Battery Energy Systems \| Operating segments \| Net sales - inter-segment
Segment Reporting Information
Net sales	$ 0	$ 0

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