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Restructuring (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) employee | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 27, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  | 20.00% | 20.00% |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision | $ 31 | $ 14 | $ 13 | $ 14 | $ 23 | $ 6 | $ 31 | $ 8 | $ 72 | $ 67 | $ 58 |
Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | 25 |  |  |  | 5 | 25 | 5 |  |
Provision |  |  |  |  |  |  |  |  | 44 | 42 |  |
Cash payments |  |  |  |  |  |  |  |  | (35) | (22) |  |
Restructuring reserve, ending balance | 34 |  |  |  | 25 |  |  |  | 34 | 25 | 5 |
Corporate Restructuring Activities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | 6 |  |  |
Sevcon, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Engine [Member] | Reduce structural costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | 5 |  |  |
Engine [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | 21 |  |  |  | 1 | 21 | 1 |  |
Provision |  |  |  |  |  |  |  |  | 43 | 35 |  |
Cash payments |  |  |  |  |  |  |  |  | (34) | (15) |  |
Restructuring reserve, ending balance | 30 |  |  |  | 21 |  |  |  | $ 30 | 21 | 1 |
Restructuring and Related Cost, Number of Positions Eliminated | employee |  |  |  |  |  |  |  |  | 350 |  |  |
Engine [Member] | Employee Severance [Member] | Reduce structural costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | $ 37 |  |  |
Engine [Member] | Professional Fees, Employee Termination and Relocation Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | 18 | 54 |  |
Emissions [Member] | Professional Fees, Employee Termination and Relocation Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  |  |  | 48 |
Drivetrain [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  |  | 7 |  |
Drivetrain [Member] | Reduce structural costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | 6 |  |  |
Drivetrain [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring reserve, beginning balance |  |  |  | $ 4 |  |  |  | $ 4 | 4 | 4 |  |
Provision |  |  |  |  |  |  |  |  | 1 | 7 |  |
Cash payments |  |  |  |  |  |  |  |  | (1) | (7) |  |
Restructuring reserve, ending balance | $ 4 |  |  |  | $ 4 |  |  |  | 4 | 4 | $ 4 |
Drivetrain [Member] | Manufacturing Footprint Rationalization Activities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | $ 10 |  |  |
Europe | Engine [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  |  | $ 28 |  |
Europe | Engine [Member] | Professional Fees, Employee Termination and Relocation Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated | employee |  |  |  |  |  |  |  |  | 140 |  |  |
Non-Europe [Member] | Engine [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Provision |  |  |  |  |  |  |  |  | $ 6 |  |  |

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