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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2012
Schedule of Operating Results and Assets of Alcoa's Reportable Segments | The operating results of Alcoa’s reportable segments were as follows (differences between segment totals and consolidated totals are in Corporate):
|  | Alumina |  |  | Primary Metals |  |  | Global Rolled Products |  |  | Engineered Products and Solutions |  |  | Total |
Third quarter ended September 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 764 |  |  | $ | 1,794 |  |  | $ | 1,849 |  |  | $ | 1,367 |  |  | $ | 5,774 |
Intersegment sales |  |  | 575 |  |  |  | 691 |  |  |  | 42 |  |  |  | — |  |  |  | 1,308 |
Total sales |  | $ | 1,339 |  |  | $ | 2,485 |  |  | $ | 1,891 |  |  | $ | 1,367 |  |  | $ | 7,082 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 2 |  |  | $ | (5 | ) |  | $ | (1 | ) |  | $ | — |  |  | $ | (4 | )
Depreciation, depletion, and amortization |  |  | 120 |  |  |  | 130 |  |  |  | 57 |  |  |  | 39 |  |  |  | 346 |
Income taxes |  |  | (22 | ) |  |  | (19 | ) |  |  | 44 |  |  |  | 79 |  |  |  | 82 |
After-tax operating income (ATOI) |  |  | (9 | ) |  |  | (14 | ) |  |  | 98 |  |  |  | 160 |  |  |  | 235 |
Third quarter ended September 30, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 879 |  |  | $ | 2,124 |  |  | $ | 1,974 |  |  | $ | 1,373 |  |  | $ | 6,350 |
Intersegment sales |  |  | 751 |  |  |  | 798 |  |  |  | 48 |  |  |  | — |  |  |  | 1,597 |
Total sales |  | $ | 1,630 |  |  | $ | 2,922 |  |  | $ | 2,022 |  |  | $ | 1,373 |  |  | $ | 7,947 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 2 |  |  | $ | (4 | ) |  | $ | — |  |  | $ | — |  |  | $ | (2 | )
Depreciation, depletion, and amortization |  |  | 117 |  |  |  | 137 |  |  |  | 61 |  |  |  | 40 |  |  |  | 355 |
Income taxes |  |  | 42 |  |  |  | 21 |  |  |  | 26 |  |  |  | 67 |  |  |  | 156 |
ATOI |  |  | 154 |  |  |  | 110 |  |  |  | 60 |  |  |  | 138 |  |  |  | 462 |
|  | Alumina |  |  | Primary Metals |  |  | Global Rolled Products |  |  | Engineered Products and Solutions |  |  | Total |
Nine months ended September 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 2,289 |  |  | $ | 5,542 |  |  | $ | 5,607 |  |  | $ | 4,177 |  |  | $ | 17,615 |
Intersegment sales |  |  | 1,768 |  |  |  | 2,234 |  |  |  | 130 |  |  |  | — |  |  |  | 4,132 |
Total sales |  | $ | 4,057 |  |  | $ | 7,776 |  |  | $ | 5,737 |  |  | $ | 4,177 |  |  | $ | 21,747 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 4 |  |  | $ | (16 | ) |  | $ | (4 | ) |  | $ | — |  |  | $ | (16 | )
Depreciation, depletion, and amortization |  |  | 348 |  |  |  | 398 |  |  |  | 171 |  |  |  | 118 |  |  |  | 1,035 |
Income taxes |  |  | (29 | ) |  |  | (51 | ) |  |  | 136 |  |  |  | 228 |  |  |  | 284 |
ATOI |  |  | 49 |  |  |  | (7 | ) |  |  | 289 |  |  |  | 475 |  |  |  | 806 |
Nine months ended September 30, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 2,615 |  |  | $ | 6,249 |  |  | $ | 5,951 |  |  | $ | 3,990 |  |  | $ | 18,805 |
Intersegment sales |  |  | 2,107 |  |  |  | 2,559 |  |  |  | 179 |  |  |  | — |  |  |  | 4,845 |
Total sales |  | $ | 4,722 |  |  | $ | 8,808 |  |  | $ | 6,130 |  |  | $ | 3,990 |  |  | $ | 23,650 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 27 |  |  | $ | (4 | ) |  | $ | — |  |  | $ | 1 |  |  | $ | 24 |
Depreciation, depletion, and amortization |  |  | 332 |  |  |  | 420 |  |  |  | 179 |  |  |  | 119 |  |  |  | 1,050 |
Income taxes |  |  | 146 |  |  |  | 129 |  |  |  | 94 |  |  |  | 201 |  |  |  | 570 |
ATOI |  |  | 482 |  |  |  | 513 |  |  |  | 240 |  |  |  | 417 |  |  |  | 1,652 |
Schedule of Segment Reporting Information to Consolidated Net Income Attributable to Alcoa | The following table reconciles total segment ATOI to consolidated net (loss) income attributable to Alcoa:
|  | Third quarter ended September 30, |  |  | Nine months ended September 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Total segment ATOI |  | $ | 235 |  |  | $ | 462 |  |  | $ | 806 |  |  | $ | 1,652 |
Unallocated amounts (net of tax): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impact of LIFO |  |  | (7 | ) |  |  | 2 |  |  |  | 12 |  |  |  | (49 | )
Interest expense |  |  | (81 | ) |  |  | (81 | ) |  |  | (241 | ) |  |  | (259 | )
Noncontrolling interests |  |  | 32 |  |  |  | (53 | ) |  |  | 44 |  |  |  | (166 | )
Corporate expense |  |  | (62 | ) |  |  | (76 | ) |  |  | (195 | ) |  |  | (219 | )
Restructuring and other charges |  |  | (2 | ) |  |  | (7 | ) |  |  | (19 | ) |  |  | (35 | )
Discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (5 | )
Other* |  |  | (258 | ) |  |  | (75 | ) |  |  | (458 | ) |  |  | (117 | )
Consolidated net (loss) income attributable to Alcoa |  | $ | (143 | ) |  | $ | 172 |  |  | $ | (51 | ) |  | $ | 802 |
* | In the third quarter and nine-month period of 2012, Other includes after-tax charges related to environmental remediation ($116 and $129) and a civil litigation matter ($26 and $55), respectively, (see Note G).

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