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Earnings Per Share (EPS) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] |
13. | EARNINGS PER SHARE (EPS)
We present earnings per share using the two-class method. This method allocates undistributed earnings between common shares and non-vested share based payment awards that entitle the holder to non-forfeitable dividend rights. Our participating securities include non-vested restricted stock units. The following table sets forth the computation of our basic and diluted EPS available to shareholders of common stock (excluding participating securities):
|  | Three Months Ended
|  | March 31,
|  | 2018 |  | 2017
|  | (in millions, except per share data)
Numerator |  |  |  |  |
Net income attributable to AAM |  | $ | 89.4 |  |  | $ | 78.4 |
Less: Net income attributable to participating securities |  | (2.2 | ) |  | (1.9 | )
Net income attributable to common shareholders - Basic and Dilutive |  | $ | 87.2 |  |  | $ | 76.5 |
Denominators |  |  |  |  |  |
Basic common shares outstanding - |  |  |  |  |  |
Weighted-average shares outstanding |  | 114.2 |  |  | 78.5 |
Less: Participating securities |  | (2.8 | ) |  | (1.9 | )
Weighted-average common shares outstanding |  | 111.4 |  |  | 76.6 |
Effect of dilutive securities - |  |  |  |  |  |
Dilutive stock-based compensation |  | 0.5 |  |  | 0.4 |
Diluted shares outstanding - |  |  |  |  |  |
Adjusted weighted-average shares after assumed conversions |  | 111.9 |  |  | 77.0 |
Basic EPS |  | $ | 0.78 |  |  | $ | 1.00 |
Diluted EPS |  | $ | 0.78 |  |  | $ | 0.99 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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