RESTRUCTURING - Narratives (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) employee	Dec. 31, 2019 USD ($) employee	Dec. 31, 2018 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		$ 50	$ 203	$ 72	$ 67
Restructuring and Related plan	$ 300		300
2020 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			$ 148
Delphi Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	$ 54
Restructuring and Related plan		$ 175		$ 175
Air Management
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee			200	350
Air Management | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					49
e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					10
Fuel Injection | Delphi Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			$ 8
Corporate | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				$ 6
Severance And Professional Fees | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				5
Severance And Professional Fees | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			59
Severance And Professional Fees | e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			14	6
Severance And Professional Fees | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					$ 8
Facility Closing | Air Management | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			19
Facility Closing | e-Propulsion & Drivetrain
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			$ 55
Number of positions eliminated | employee			350
One-time Termination Benefits | Air Management | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				37
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			$ 157	44
Employee termination benefits | Air Management
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee					140
Employee termination benefits | Corporate, Non-Segment | Delphi Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net			$ 44
Employee termination benefits | Air Management | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net					$ 28
Employee termination benefits | Air Management | Air Management
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net				$ 18