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Segment Information (Tables) | 6 Months Ended
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Jun. 30, 2013
Segment Reporting [Abstract] |
Schedule of Operating Results 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 |
Second quarter ended June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 822 |  |  | $ | 1,620 |  |  | $ | 1,877 |  |  | $ | 1,468 |  |  | $ | 5,787 |
Intersegment sales |  |  | 581 |  |  |  | 677 |  |  |  | 43 |  |  |  | — |  |  |  | 1,301 |
Total sales |  | $ | 1,403 |  |  | $ | 2,297 |  |  | $ | 1,920 |  |  | $ | 1,468 |  |  | $ | 7,088 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity loss |  | $ | (1) |  |  | $ | (7) |  |  | $ | (2) |  |  | $ | — |  |  | $ | (10) |
Depreciation, depletion, and amortization |  |  | 115 |  |  |  | 132 |  |  |  | 55 |  |  |  | 39 |  |  |  | 341 |
Income taxes |  |  | 14 |  |  |  | (25) |  |  |  | 32 |  |  |  | 94 |  |  |  | 115 |
ATOI |  |  | 64 |  |  |  | (32) |  |  |  | 79 |  |  |  | 193 |  |  |  | 304 |
Second quarter ended June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 750 |  |  | $ | 1,804 |  |  | $ | 1,913 |  |  | $ | 1,420 |  |  | $ | 5,887 |
Intersegment sales |  |  | 576 |  |  |  | 782 |  |  |  | 44 |  |  |  | — |  |  |  | 1,402 |
Total sales |  | $ | 1,326 |  |  | $ | 2,586 |  |  | $ | 1,957 |  |  | $ | 1,420 |  |  | $ | 7,289 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 1 |  |  | $ | (9) |  |  | $ | (2) |  |  | $ | — |  |  | $ | (10) |
Depreciation, depletion, and amortization |  |  | 114 |  |  |  | 133 |  |  |  | 57 |  |  |  | 39 |  |  |  | 343 |
Income taxes |  |  | (6) |  |  |  | (19) |  |  |  | 34 |  |  |  | 76 |  |  |  | 85 |
ATOI |  |  | 23 |  |  |  | (3) |  |  |  | 78 |  |  |  | 157 |  |  |  | 255 |
|  | Alumina |  |  | Primary Metals |  |  | Global Rolled Products |  |  | Engineered Products and Solutions |  |  | Total |
Six months ended June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 1,648 |  |  | $ | 3,378 |  |  | $ | 3,656 |  |  | $ | 2,891 |  |  | $ | 11,573 |
Intersegment sales |  |  | 1,176 |  |  |  | 1,404 |  |  |  | 94 |  |  |  | — |  |  |  | 2,674 |
Total sales |  | $ | 2,824 |  |  | $ | 4,782 |  |  | $ | 3,750 |  |  | $ | 2,891 |  |  | $ | 14,247 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity loss |  | $ | — |  |  | $ | (16) |  |  | $ | (6) |  |  | $ | — |  |  | $ | (22) |
Depreciation, depletion, and amortization |  |  | 224 |  |  |  | 267 |  |  |  | 112 |  |  |  | 79 |  |  |  | 682 |
Income taxes |  |  | 28 |  |  |  | (24) |  |  |  | 71 |  |  |  | 178 |  |  |  | 253 |
ATOI |  |  | 122 |  |  |  | 7 |  |  |  | 160 |  |  |  | 366 |  |  |  | 655 |
Six months ended June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 1,525 |  |  | $ | 3,748 |  |  | $ | 3,758 |  |  | $ | 2,810 |  |  | $ | 11,841 |
Intersegment sales |  |  | 1,193 |  |  |  | 1,543 |  |  |  | 88 |  |  |  | — |  |  |  | 2,824 |
Total sales |  | $ | 2,718 |  |  | $ | 5,291 |  |  | $ | 3,846 |  |  | $ | 2,810 |  |  | $ | 14,665 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 2 |  |  | $ | (11) |  |  | $ | (3) |  |  | $ | — |  |  | $ | (12) |
Depreciation, depletion, and amortization |  |  | 228 |  |  |  | 268 |  |  |  | 114 |  |  |  | 79 |  |  |  | 689 |
Income taxes |  |  | (7) |  |  |  | (32) |  |  |  | 85 |  |  |  | 149 |  |  |  | 195 |
ATOI |  |  | 58 |  |  |  | 7 |  |  |  | 180 |  |  |  | 314 |  |  |  | 559 |
Schedule of Segment ATOI to Consolidated Net Income Attributable to Alcoa | The following table reconciles total segment ATOI to consolidated net (loss) income attributable to Alcoa:
|  | Second quarter ended June 30, |  |  | Six months ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Total segment ATOI |  | $ | 304 |  |  | $ | 255 |  |  | $ | 655 |  |  | $ | 559 |
Unallocated amounts (net of tax): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impact of LIFO |  |  | 5 |  |  |  | 19 |  |  |  | 3 |  |  |  | 19 |
Interest expense |  |  | (76 | ) |  |  | (80 | ) |  |  | (151 | ) |  |  | (160 | )
Noncontrolling interests |  |  | 29 |  |  |  | 17 |  |  |  | 8 |  |  |  | 12 |
Corporate expense |  |  | (71 | ) |  |  | (69 | ) |  |  | (138 | ) |  |  | (133 | )
Restructuring and other charges |  |  | (211 | ) |  |  | (10 | ) |  |  | (216 | ) |  |  | (17 | )
Other |  |  | (99 | ) |  |  | (134 | ) |  |  | (131 | ) |  |  | (188 | )
Consolidated net (loss) income attributable to Alcoa |  | $ | (119 | ) |  | $ | (2 | ) |  | $ | 30 |  |  | $ | 92 |

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