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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings per Share reconciliation [Text Block] |
| Year Ended December 31,
(in millions except share and per share amounts) | 2019 |  | 2018 |  | 2017
Basic earnings per share: |  |  |  |  |  |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 746 |  |  | $ | 931 |  |  | $ | 440 |
Weighted average shares of common stock outstanding | 205.7 |  |  | 208.2 |  |  | 210.4 |
Basic earnings per share of common stock | $ | 3.63 |  |  | $ | 4.47 |  |  | $ | 2.09 |
Diluted earnings per share: |  |  |  |  |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 746 |  |  | $ | 931 |  |  | $ | 440 |
Weighted average shares of common stock outstanding | 205.7 |  |  | 208.2 |  |  | 210.4 |
Effect of stock-based compensation | 1.1 |  |  | 1.3 |  |  | 1.1 |
Weighted average shares of common stock outstanding including dilutive shares | 206.8 |  |  | 209.5 |  |  | 211.5 |
Diluted earnings per share of common stock | $ | 3.61 |  |  | $ | 4.44 |  |  | $ | 2.08 |
Antidilutive stock-based awards excluded from the calculation of diluted earnings per share | 0.1 |  |  | 0.1 |  |  | — |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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