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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2011
Earnings Per Share [Abstract] |
Reconciliation Of Information Used To Compute Basic And Diluted EPS |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Income (loss) from continuing operations attributable to Alcoa common shareholders |  | $ | 614 |  |  | $ | 262 |  |  | $ | (985 | )
Less: preferred stock dividends declared |  |  | 2 |  |  |  | 2 |  |  |  | 2 |
Income (loss) from continuing operations available to common equity |  |  | 612 |  |  |  | 260 |  |  |  | (987 | )
Less: dividends and undistributed earnings allocated to participating securities |  |  | 1 |  |  |  | 1 |  |  |  | — |
Income (loss) from continuing operations available to Alcoa common shareholders—basic |  |  | 611 |  |  |  | 259 |  |  |  | (987 | )
Add: interest expense related to convertible notes |  |  | 30 |  |  |  | — |  |  |  | — |
Income (loss) from continuing operations available to Alcoa common shareholders—diluted |  | $ | 641 |  |  | $ | 259 |  |  | $ | (987 | )
Average shares outstanding—basic |  |  | 1,061 |  |  |  | 1,018 |  |  |  | 935 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 7 |  |  |  | 6 |  |  |  | — |
Stock and performance awards |  |  | 4 |  |  |  | 1 |  |  |  | — |
Convertible notes |  |  | 89 |  |  |  | — |  |  |  | — |
Average shares outstanding—diluted |  |  | 1,161 |  |  |  | 1,025 |  |  |  | 935 |

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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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