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ACQUISITIONS - Summary of Purchase Price Consideration (Details) - Delphi Technologies PLC $ / shares in Units, $ in Millions	Oct. 01, 2020 USD ($) $ / shares shares
Business Acquisition [Line Items]
BorgWarner common stock issued for purchase of Delphi Technologies (in shares) | shares	37,188,819
BorgWarner share price at October 1, 2020 | $ / shares	$ 39.54
Fair value of stock consideration	$ 1,470
Stock compensation consideration	7
Total stock consideration	1,477
Cash consideration	18
Repayment of Delphi Technologies’ debt	896
Total consideration	$ 2,391

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