RESTRUCTURING - Reserve by Type of Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	$ 62	$ 37	$ 92	$ 52
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	3	0	3	0
Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	12	16	29	29
e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	23	21	33	23
Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	24	0	27	0
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	36	28	57	40
Employee termination benefits | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	0	0	0	0
Employee termination benefits | Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	9	11	23	22
Employee termination benefits | e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	3	17	7	18
Employee termination benefits | Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	24	0	27	0
Other
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	26	9	35	12
Other | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	3	0	3	0
Other | Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	3	5	6	7
Other | e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	20	4	26	5
Other | Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	$ 0	$ 0	$ 0	$ 0