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Quarterly Data (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Data | Supplemental Financial Information (unaudited) Quarterly Data (in millions, except per-share amounts)
|  | First |  |  | Second |  |  | Third |  |  | Fourth* |  |  | Year |
2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales |  | $ | 5,833 |  |  | $ | 5,849 |  |  | $ | 5,765 |  |  | $ | 5,585 |  |  | $ | 23,032 |
Net income (loss) attributable to Alcoa common shareholders |  | $ | 149 |  |  | $ | (119 | ) |  | $ | 24 |  |  | $ | (2,339 | ) |  | $ | (2,285 | )
Earnings per share attributable to Alcoa common shareholders**: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.14 |  |  | $ | (0.11 | ) |  | $ | 0.02 |  |  | $ | (2.19 | ) |  | $ | (2.14 | )
Diluted |  | $ | 0.13 |  |  | $ | (0.11 | ) |  | $ | 0.02 |  |  | $ | (2.19 | ) |  | $ | (2.14 | )
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales |  | $ | 6,006 |  |  | $ | 5,963 |  |  | $ | 5,833 |  |  | $ | 5,898 |  |  | $ | 23,700 |
Net income (loss) attributable to Alcoa common shareholders |  | $ | 94 |  |  | $ | (2 | ) |  | $ | (143 | ) |  | $ | 242 |  |  | $ | 191 |
Earnings per share attributable to Alcoa common shareholders**: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.09 |  |  | $ | - |  |  | $ | (0.13 | ) |  | $ | 0.23 |  |  | $ | 0.18 |
Diluted |  | $ | 0.09 |  |  | $ | - |  |  | $ | (0.13 | ) |  | $ | 0.21 |  |  | $ | 0.18 |
* | In the fourth quarter of 2013, Alcoa recorded a $1,731 ($1,719 after noncontrolling interest) impairment of goodwill (see Goodwill and Other Intangible Assets in Note A and Note E), a $372 discrete income tax charge for valuation allowances on certain deferred tax assets in Spain and the U.S. (see Note T), and a $288 ($243 after-tax and noncontrolling interest) charge related to a legal matter (see Note C and Government Investigations under Litigation in Note N).
** | Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 + Details
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