v3.26.1
RESTRUCTURING - Schedule of Reserve by Type of Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net     $ 11 $ 23
Restructuring expense, net $ 21 $ 17 39 48
Corporate        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 0 0 2 1
Turbos & Thermal Technologies        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 4 10 13 17
Drivetrain & Morse Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 2 1 6 2
PowerDrive Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 3 1 2 17
Battery Energy Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 12 5 16 11
Employee termination benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 19 13 32 33
Employee termination benefits | Corporate        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 0 0 2 1
Employee termination benefits | Turbos & Thermal Technologies        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 4 8 10 13
Employee termination benefits | Drivetrain & Morse Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 1 1 2 1
Employee termination benefits | PowerDrive Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 3 1 3 9
Employee termination benefits | Battery Energy Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 11 3 15 9
Other        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 2 4 7 15
Other | Corporate        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 0 0 0 0
Other | Turbos & Thermal Technologies        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 0 2 3 4
Other | Drivetrain & Morse Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 1 0 4 1
Other | PowerDrive Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net 0 0 (1) 8
Other | Battery Energy Systems        
Restructuring Cost and Reserve [Line Items]        
Restructuring expense, net $ 1 $ 2 $ 1 $ 2