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RESTRUCTURING - Narratives (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) employee | Dec. 31, 2020 USD ($) employee | Dec. 31, 2019 USD ($) employee
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  | $ 50 | $ 163 | $ 203 | $ 72
2020 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | 103 | $ 148 |
Restructuring cost, incurred to date |  |  | 251 |  |
Restructuring and related plan |  |  | 300 |  |
Delphi Technologies Restructuring |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net | $ 54 |  | 60 |  |
Restructuring cost, incurred to date |  |  | $ 62 |  |
Air Management |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Number of positions eliminated | employee |  |  | 140 | 200 | 130
Professional Fees Employee Termination and Relocation Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  |  |  | $ 18
Professional Fees Employee Termination and Relocation Costs | Air Management |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  |  |  | 18
One-time Termination Benefits | Air Management |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | $ 23 | $ 27 | 37
Employee termination benefits |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | 99 | 157 |
Employee termination benefits | Air Management |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | 4 | $ 19 | $ 5
Number of positions eliminated | employee |  |  |  | 200 |
Severance And Professional Fees | Air Management |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | 25 | $ 33 |
Severance And Professional Fees | e-Propulsion & Drivetrain |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | 19 | 15 |
Contractual Settlements, Professional Fees And Other Costs | e-Propulsion & Drivetrain |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  | $ 35 |  |
Facility Closing | e-Propulsion & Drivetrain |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense, net |  |  |  | $ 55 |
Facility Closing | e-Propulsion & Drivetrain | Europe |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Number of positions eliminated | employee |  |  |  | 350 |

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