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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share Reconciliation |
| Three Months Ended March 31,
(in millions, except per share amounts) | 2019 |  | 2018
Basic earnings per share: |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 160 |  |  | $ | 225 |
Weighted average shares of common stock outstanding | 206.5 |  |  | 209.5 |
Basic earnings per share of common stock | $ | 0.77 |  |  | $ | 1.07 |
Diluted earnings per share: |  |  |
Net earnings attributable to BorgWarner Inc. | $ | 160 |  |  | $ | 225 |
Weighted average shares of common stock outstanding | 206.5 |  |  | 209.5 |
Effect of stock-based compensation | 0.6 |  |  | 1.3 |
Weighted average shares of common stock outstanding including dilutive shares | 207.1 |  |  | 210.8 |
Diluted earnings per share of common stock | $ | 0.77 |  |  | $ | 1.07 |
Anti-dilutive stock-based awards excluded from the calculation of diluted earnings per share: | 0.5 |  |  | — |

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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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