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ACQUISITIONS AND DISPOSITIONS - Narrative (Details) € / shares in Units, $ / shares in Units, ¥ in Billions |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 15, 2022 USD ($) | Feb. 15, 2022 JPY (¥) | Dec. 31, 2021 USD ($) | Oct. 01, 2020 USD ($) $ / shares | Jan. 02, 2019 USD ($) business_acquired | Feb. 28, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) segment | Dec. 31, 2021 EUR (€) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2022 USD ($) | Feb. 15, 2022 JPY (¥) | Dec. 31, 2021 EUR (€) | Dec. 17, 2021 USD ($) | Dec. 17, 2021 EUR (€) € / shares | Oct. 25, 2021 USD ($) | Sep. 30, 2021 USD ($) | Aug. 02, 2021 | Jun. 04, 2021 USD ($) | Jun. 04, 2021 EUR (€) | Dec. 29, 2020 | Jun. 19, 2020 USD ($) | May 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 3,279,000,000 |  |  |  |  |  |  | $ 3,279,000,000 |  | $ 2,627,000,000 | $ 1,842,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  |  |  |  |  | 4 | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss (gain) on equity securities |  |  |  |  |  |  |  |  |  | $ (362,000,000) |  | 382,000,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  | 130,000,000 |  |  |  |  |  |  | 130,000,000 |  | 472,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of businesses acquired | business_acquired |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  |  |  |  | 759,000,000 |  | 449,000,000 | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on divestiture |  |  |  |  |  |  |  |  |  | (29,000,000) |  | 0 | $ (7,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Water Valley |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 177,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Water Valley |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  |  |  |  | 39,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, consideration |  |  | 57,000,000 |  |  |  |  |  |  | 57,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential earn out payments |  |  | 30,000,000 |  |  |  |  |  |  | 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated payout |  |  | 18,000,000 |  |  |  |  |  |  | 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on divestiture |  |  | 22,000,000 |  |  |  |  |  |  | (22,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale |  |  | 99,000,000 |  |  |  |  |  |  | 99,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 12,000,000 |  |  |  |  |  |  | 12,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  | 20,000,000 |  |  |  |  |  |  | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,100,000,000 |
Senior Notes | 1.000% Senior notes due 05/19/31 (€1,000 million par value) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% | 1.00% |  |  |
Debt instrument face value | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1,000,000,000 |  |  |  |  |  |  |  |  |  |
Senior Notes | DT Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BorgWarner Romeo Power LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14.00% |  |
Investment fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,000,000 |  |  |  |  |  |  |
Corporate Joint Venture | BorgWarner Romeo Power LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00%
Romeo Power Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest equity interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00%
BorgWarner Romeo Power LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss (gain) on equity securities |  |  |  |  |  |  |  |  |  | (362,000,000) |  | 382,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  | $ 70,000,000 |  |  |  |  |  |  | $ 70,000,000 |  | 432,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
BorgWarner Romeo Power LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment fair value |  |  |  |  |  | $ 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of ownership interest disposal |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of equity method investment |  |  |  |  |  | $ 29,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination fair value reduced by discount |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BorgWarner Romeo Power LLC | Corporate Joint Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000
AKASOL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  | 93.00% |  |  |  |  |  |  | 93.00% |  |  |  |  |  | 93.00% |  |  |  |  | 100.00% | 89.00% | 89.00% |  |  |
Business acquisition, preacquisition contingency, amount of settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 788,000,000 | € 648,000,000 |  |  |
Financial liabilities assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 77,000,000 | € 64,000,000 |  |  |
BorgWarner common stock issued for purchase of Delphi Technologies |  |  |  |  |  |  |  |  |  | $ 33,000,000 | € 28,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 119.16 |  |  |  |  |  |  |  |
Noncontrolling interest |  |  | $ 96,000,000 |  |  |  |  |  |  | 96,000,000 |  |  |  |  |  |  | $ 58,000,000 | € 51,000,000 |  |  |  | 96,000,000 |  |  |  |
Goodwill |  |  | $ 704,000,000 |  |  |  |  |  |  | 704,000,000 |  |  |  |  |  |  |  |  |  |  |  | $ 707,000,000 |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | $ 67,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delphi Technologies PLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest |  |  |  | $ 89,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 89,000,000 |  |  |  |  |  |
Goodwill |  |  |  | $ 710,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 754,000,000 |  |  |  |  |  |
Fixed exchange ratio |  |  |  | 0.4307 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollar per share) | $ / shares |  |  |  | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  | $ 2,391,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  |  | $ 89,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  | $ 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Romeo Power Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000
Rinehart Motion Systems LLC and AM Racing LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  | $ 2,000,000 | $ 2,000,000 | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rinehart Motion Systems LLC and AM Racing LLC | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, contingent consideration, liability |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Santoll Automotive Components | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred | $ 220,000,000 | ¥ 1.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, contingent consideration, liability | 47,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 0.3 |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses | $ 173,000,000 | ¥ 1.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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