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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Reconciliation of Information Used to Compute Basic and Diluted EPS | The information used to compute basic and diluted EPS attributable to Alcoa common shareholders was as follows (shares in millions):
|  | Second quarter ended June 30, |  |  | Six months ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Net (loss) income attributable to Alcoa common shareholders |  | $ | (119 | ) |  | $ | (2 | ) |  | $ | 30 |  |  | $ | 92 |
Less: preferred stock dividends declared |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 1 |
Net (loss) income available to common equity |  |  | (119 | ) |  |  | (2 | ) |  |  | 29 |  |  |  | 91 |
Less: dividends and undistributed earnings allocated to participating securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net (loss) income available to Alcoa common shareholders – basic |  |  | (119 | ) |  |  | (2 | ) |  |  | 29 |  |  |  | 91 |
Add: interest expense related to convertible notes |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net (loss) income available to Alcoa common shareholders – diluted |  | $ | (119 | ) |  | $ | (2 | ) |  | $ | 29 |  |  | $ | 91 |
Average shares outstanding – basic |  |  | 1,069 |  |  |  | 1,067 |  |  |  | 1,069 |  |  |  | 1,066 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | 4 |
Stock and performance awards |  |  | — |  |  |  | — |  |  |  | 8 |  |  |  | 5 |
Convertible notes |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Average shares outstanding – diluted |  |  | 1,069 |  |  |  | 1,067 |  |  |  | 1,079 |  |  |  | 1,075 |

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- Definition Disclosure of the description and amount of each reconciling item used to derive the numerator and denominator for the calculation of an entity's basic and diluted earnings per share. + References No definition available. + Details
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- Details
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