RESTRUCTURING - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended	20 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($) employee	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	$ 51	$ 20	$ 143	$ 72
Restructuring expense, net	51	20	143	$ 72
Air Management
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee				350
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
Contractual Settlements, Professional Fees And Other Costs | Air Management | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	10		36
Contractual Settlements, Professional Fees And Other Costs | e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	4		27
Termination Benefit | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		8		21
Severance Costs and Professional Fees | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		7		19
Severance Costs and Professional Fees | e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		3		8
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	38	10	95	50
Restructuring expense, net			95	50
Employee termination benefits | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				$ 3
Number of positions eliminated | employee				200
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 | e-Propulsion & Drivetrain | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		19		$ 19
Number of positions eliminated | employee				350
Employee termination benefits | Fuel Injection | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid	29	0	56	$ 0
Severance Costs, Equipment Relocation and Professional Fees | e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	7		17
Delphi Technologies PLC
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			62
Delphi Technologies PLC | Employee termination benefits | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net of cash paid			4
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	20	$ 20	81	$ 72		$ 229
Restructuring and related plan	$ 300		$ 300		$ 300	$ 300
Delphi Technologies Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					$ 64