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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share Reconciliation |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions, except per share amounts) | 2017 |  | 2016 |  | 2017 |  | 2016
Basic earnings per share: |  |  |  |  |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 184.9 |  |  | $ | 83.3 |  |  | $ | 586.1 |  |  | $ | 411.8 |
Weighted average shares of common stock outstanding | 209.803 |  |  | 212.872 |  |  | 210.657 |  |  | 215.332 |
Basic earnings per share of common stock | $ | 0.88 |  |  | $ | 0.39 |  |  | $ | 2.78 |  |  | $ | 1.91 |
Diluted earnings per share: |  |  |  |  |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 184.9 |  |  | $ | 83.3 |  |  | $ | 586.1 |  |  | $ | 411.8 |
Weighted average shares of common stock outstanding | 209.803 |  |  | 212.872 |  |  | 210.657 |  |  | 215.332 |
Effect of stock-based compensation | 1.210 |  |  | 0.894 |  |  | 0.918 |  |  | 0.857 |
Weighted average shares of common stock outstanding including dilutive shares | 211.013 |  |  | 213.766 |  |  | 211.575 |  |  | 216.189 |
Diluted earnings per share of common stock | $ | 0.88 |  |  | $ | 0.39 |  |  | $ | 2.77 |  |  | $ | 1.90 |

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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://www.xbrl.org/2003/role/presentationRef -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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