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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2012
Segment Information [Abstract] |
Schedule Of Operating Results And Assets Of Alcoa's Reportable Segments |
|  | Alumina |  |  | Primary Metals |  |  | Global Rolled Products* |  |  | Engineered Products and Solutions |  |  | Total |
First quarter ended March 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 775 |  |  | $ | 1,944 |  |  | $ | 1,845 |  |  | $ | 1,390 |  |  | $ | 5,954 |
Intersegment sales |  |  | 617 |  |  |  | 761 |  |  |  | 44 |  |  |  | — |  |  |  | 1,422 |
Total sales |  | $ | 1,392 |  |  | $ | 2,705 |  |  | $ | 1,889 |  |  | $ | 1,390 |  |  | $ | 7,376 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 1 |  |  | $ | (2 | ) |  | $ | (1 | ) |  | $ | — |  |  | $ | (2 | )
Depreciation, depletion, and amortization |  |  | 114 |  |  |  | 135 |  |  |  | 57 |  |  |  | 40 |  |  |  | 346 |
Income taxes |  |  | (1 | ) |  |  | (13 | ) |  |  | 49 |  |  |  | 72 |  |  |  | 107 |
After-tax operating income (ATOI) |  |  | 35 |  |  |  | 10 |  |  |  | 96 |  |  |  | 155 |  |  |  | 296 |
First quarter ended March 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 810 |  |  | $ | 1,980 |  |  | $ | 1,892 |  |  | $ | 1,247 |  |  | $ | 5,929 |
Intersegment sales |  |  | 633 |  |  |  | 839 |  |  |  | 69 |  |  |  | — |  |  |  | 1,541 |
Total sales |  | $ | 1,443 |  |  | $ | 2,819 |  |  | $ | 1,961 |  |  | $ | 1,247 |  |  | $ | 7,470 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income |  | $ | 3 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 5 |
Depreciation, depletion, and amortization |  |  | 103 |  |  |  | 141 |  |  |  | 58 |  |  |  | 38 |  |  |  | 340 |
Income taxes |  |  | 44 |  |  |  | 53 |  |  |  | 33 |  |  |  | 62 |  |  |  | 192 |
ATOI |  |  | 142 |  |  |  | 202 |  |  |  | 81 |  |  |  | 130 |  |  |  | 555 |
* | In the first quarter of 2012, Alcoa changed the name of the Flat-Rolled Products segment to the Global Rolled Products segment
Schedule Of Segment Reporting Information To Consolidated Net Income Attributable To Alcoa |
|  | First quarter ended March 31, |
|  | 2012 |  |  | 2011 |
Total segment ATOI |  | $ | 296 |  |  | $ | 555 |
Unallocated amounts (net of tax): |  |  |  |  |  |  |  |
Impact of LIFO |  |  | — |  |  |  | (24 | )
Interest expense |  |  | (80 | ) |  |  | (72 | )
Noncontrolling interests |  |  | (5 | ) |  |  | (58 | )
Corporate expense |  |  | (64 | ) |  |  | (67 | )
Restructuring and other charges |  |  | (7 | ) |  |  | (6 | )
Discontinued operations |  |  | — |  |  |  | (1 | )
Other |  |  | (46 | ) |  |  | (19 | )
Consolidated net income attributable to Alcoa |  | $ | 94 |  |  | $ | 308 |

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