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Recent Transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2019 | Jan. 02, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments for investments in equity securities |  |  | $ 48 | $ 3 |  |  |
Payments for business acquired |  | $ 10 | 10 | $ 0 |  |  |
Business Combination, Contingent Consideration, Liability | $ 5 |  | 5 |  |  |  |
Goodwill | 1,845 |  | $ 1,845 |  |  |  | $ 1,853
Cascadia Motion [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  | Jan. 02, 2019 |  |  |  |
Payments for business acquired |  |  | $ 15 |  |  |  |
Other intangible assets |  |  |  |  |  | $ 5 |
Goodwill |  |  |  |  |  | 7 |
Other assets and liabilities |  |  |  |  |  | $ 2 |
Minimum [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 2 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 15 years |  |  |  |
Series A-1 Preferred Stock of Romeo Power Technology [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount | 50 |  | $ 50 |  |  |  |
Payments for investments in equity securities | $ 46 |  |  |  |  |  |
Romeo Power Technology [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Ownership Percentage in Investee | 20.00% |  | 20.00% |  |  |  |
Scenario, Forecast [Member] | Joint Venture between BorgWarner and Romeo Power Technology [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  | 60.00% |  |

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