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Restructuring- Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) facility employee | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($)
Restructuring Cost and Reserve |  |  |  |
Number of offices facilities closed (facility) | facility | 2 |  |  |
Restructuring and related cost, number of positions eliminated (employees) | employee | 550 |  |  |
Restructuring expense | $ 37 | $ 13 | $ 52 | $ 27
Termination Benefit | Engine |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense | 3 |  |  |
Termination Benefit | Drivetrain |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense | 17 |  |  |
Severance And Professional Fees | Engine |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense | 7 | 4 | 12 | 11
Severance And Professional Fees | Drivetrain |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense | 3 |  | 5 |
Voluntary termination | Engine |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense | $ 5 | $ 7 | $ 13 | 11
Corporate restructuring | Corporate |  |  |  |
Restructuring Cost and Reserve |  |  |  |
Restructuring expense |  |  |  | $ 3

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