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Recent Transactions (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 30, 2019 | Jan. 02, 2019 | Dec. 31, 2018 | Mar. 31, 2019 | Sep. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2019 | Jun. 30, 2019 | May 31, 2019 | Sep. 27, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on derecognition of subsidiary | $ 177 |  |  |  |  |  | $ 177 | $ 0 | $ 0 |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% |  |
Payments for businesses acquired, net of cash acquired |  |  |  |  |  |  | 10 | 0 | 186 |  |  |  |
Goodwill |  |  | $ 1,853 |  |  |  | 1,842 | 1,853 |  |  |  |  |
Proceeds from sale of businesses, net of cash divested |  |  |  |  |  |  | 24 | 0 | 0 |  |  |  |
Noncontrolling Interest, Decrease from Deconsolidation |  |  |  |  |  |  |  | 0 |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | 28 |  |  |  |  |  |  |  |  |  |
Asset impairment and loss on divestiture |  |  |  |  |  |  | 7 | 26 | 71 |  |  |  |
Assets |  |  | 10,095 |  |  | $ 9,788 | 9,702 | 10,095 | $ 9,788 |  |  |  |
Inventories, net |  |  | 781 |  |  |  | $ 807 | $ 781 |  |  |  |  |
Romeo Systems Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  |  |  |  |  |  |  |  | $ 50 |
Rinehart Motion Systems LLC and AM Racing LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 10 |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  | $ 5 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  | 2 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 15 |  |  |  |  |  |  |  |  |  |  |
Sevcon, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  |  |  |  |  |  |  | Sep. 27, 2017 |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Payments for businesses acquired, net of cash acquired |  |  |  |  |  |  |  |  | $ 186 |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |  | 27 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  |  |  |  |  |  |  |  |  |  | $ 16
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory |  |  |  |  |  |  |  |  |  |  |  |  | 17
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other |  |  |  |  |  |  |  |  |  |  |  |  | 3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  |  |  |  |  |  |  | 7
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | 128
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  |  |  |  |  |  |  |  |  |  | 71
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent |  |  |  |  |  |  |  |  |  |  |  |  | (9)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other |  |  |  |  |  |  |  |  |  |  |  |  | (1)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets and Liabilities |  |  |  |  |  |  |  |  |  |  |  |  | (3)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable |  |  |  |  |  |  |  |  |  |  |  |  | (25)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  |  | 204
Liabilities assumed from businesses acquired |  |  |  |  |  |  |  |  |  |  |  |  | 18
Goodwill, Purchase Accounting Adjustments |  |  |  |  | $ (6) |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  | 5 |  |  |  |  |  |  |
Customer Relationships [Member] | Sevcon, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | 18
Developed Technology Rights [Member] | Sevcon, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | 49
Trade Names [Member] | Sevcon, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ 4
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized intangible assets, useful life |  |  |  |  |  |  | 3 years |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  | 7 years |  |  |  |  |
Minimum [Member] | Rinehart Motion Systems LLC and AM Racing LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized intangible assets, useful life |  | 2 years |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized intangible assets, useful life |  |  |  |  |  |  | 20 years |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  |  |  |  |  |  | 20 years |  |  |  |  |
Maximum [Member] | Rinehart Motion Systems LLC and AM Racing LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized intangible assets, useful life |  | 15 years |  |  |  |  |  |  |  |  |  |  |
Romeo Systems Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (percent) |  |  |  |  |  |  |  |  |  |  |  | 20.00% |
BorgWarner Romeo Power LLC [Member] | Corporate Joint Venture [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  |  |  |  |  |  |  |  | $ 10 |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  | 60.00% |  |  |
Drivetrain [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 1,012 |  |  | 1,024 | $ 1,007 | $ 1,012 | 1,024 |  |  |  |
Assets |  |  | $ 3,920 |  |  | $ 3,904 | $ 4,075 | $ 3,920 | $ 3,904 |  |  |  |
Drivetrain [Member] | Rinehart Motion Systems LLC and AM Racing LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  | $ 5 |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 7 |  |  |  |  |  |  |  |  |  |  |
BorgWarner Morse TEC LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership Percentage Transferred | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Cash payments on transfer of subsidiary to third party | $ (172) |  |  |  |  |  |  |  |  |  |  |  |
Receivables, net transferred to third party | (9) |  |  |  |  |  |  |  |  |  |  |  |
Investments and other long-term receivables transferred to third party | (371) |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets transferred to third party | (223) |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and accrued expenses transferred to third party | 7 |  |  |  |  |  |  |  |  |  |  |  |
Asbestos-relates and environmental liabilities transferred to third party | 772 |  |  |  |  |  |  |  |  |  |  |  |
Tax expense on derecognition of subsidiary | 173 |  |  |  |  |  |  |  |  |  |  |  |
After-tax gain of derecognition of subsidiary | $ 4 |  |  |  |  |  |  |  |  |  |  |  |

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