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RESTRUCTURING - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		45 Months Ended
RESTRUCTURING - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		$ 50	$ 23	$ 89	$ 71
Restructuring expense, net of cash paid				44	31
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		2	0	4	1
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		45	19	77	52
Employee termination benefits \| Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		2	0	4	1
PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		26	12	28	29
PowerDrive Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		24	10	27	19
Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		8	5	21	22
Turbos & Thermal Technologies \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		8	5	18	18
Drivetrain & Morse Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		13	1	19	3
Drivetrain & Morse Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		10	0	12	1
Battery Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		1	5	17	16
Battery Energy Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		1	4	16	13
2026 Voluntary Separation Program \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related plan	$ 26	26		26		$ 26
Restructuring expense, net		25		25
2026 Voluntary Separation Program \| PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		9		9
2026 Voluntary Separation Program \| Turbos & Thermal Technologies \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		5		5
2026 Voluntary Separation Program \| Drivetrain & Morse Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		9		9
2024 Restructuring Plan \| PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring and related plan							$ 75
Restructuring expense, net	$ 63	17	12	19	29
2024 Restructuring Plan \| PowerDrive Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				18	19
2024 Restructuring Plan \| PowerDrive Systems \| Professional Fees and Equipment Relocation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					10
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					8	$ 148
2023 Restructuring Plan \| Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					7
2023 Restructuring Plan \| Turbos & Thermal Technologies \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					5
2023 Restructuring Plan \| Turbos & Thermal Technologies \| Professional Fees and Equipment Relocation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					2
Other Actions \| Employee termination benefits \| Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		2		2
Restructuring expense, net of cash paid				2
Other Actions \| Consolidation Restructuring Efforts
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		8	11	45	34
Other Actions \| Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		3	5	16	15
Other Actions \| Turbos & Thermal Technologies \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		13		13	13
Other Actions \| Turbos & Thermal Technologies \| Contractual Settlement
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		3		3	2
Other Actions \| Drivetrain & Morse Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				3
Other Actions \| Drivetrain & Morse Systems \| Professional Fees and Equipment Relocation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				7	2
Other Actions \| Drivetrain & Morse Systems \| Contractual Settlement
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid		4	1	10
Other Actions \| Battery Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		$ 1	$ 5	17	16
Other Actions \| Battery Energy Systems \| Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				$ 16	13
Other Actions \| Battery Energy Systems \| Contractual Settlement
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					$ 3