RESTRUCTURING - Schedule of Reserve by Type of Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	$ 5	$ 21
Restructuring expense, net	18	31
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	2	1
Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	9	7
Drivetrain & Morse Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	4	1
PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	(1)	16
Battery Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	4	6
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	13	20
Employee termination benefits \| Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	2	1
Employee termination benefits \| Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	6	5
Employee termination benefits \| Drivetrain & Morse Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	1	0
Employee termination benefits \| PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	0	8
Employee termination benefits \| Battery Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	4	6
Other
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	5	11
Other \| Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	0	0
Other \| Turbos & Thermal Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	3	2
Other \| Drivetrain & Morse Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	3	1
Other \| PowerDrive Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	(1)	8
Other \| Battery Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	$ 0	$ 0