RESTRUCTURING - Reserve by Type of Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	$ 51	$ 20	$ 143	$ 72
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	0	2	3	2
Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	11	14	40	43
e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	11	4	44	27
Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	29	0	56	0
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	38	10	95	50
Employee termination benefits | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	0	1	0	1
Employee termination benefits | Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	7	9	30	31
Employee termination benefits | e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	2	0	9	18
Employee termination benefits | Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	29	0	56	0
Other
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	13	10	48	22
Other | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	0	1	3	1
Other | Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	4	5	10	12
Other | e-Propulsion & Drivetrain | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	9	4	35	9
Other | Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	$ 0	$ 0	$ 0	$ 0