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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2013
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 |
First quarter ended March 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third-party sales |  | $ | 826 |  |  | $ | 1,758 |  |  | $ | 1,779 |  |  | $ | 1,423 |  |  | $ | 5,786 |
Intersegment sales |  |  | 595 |  |  |  | 727 |  |  |  | 51 |  |  |  | — |  |  |  | 1,373 |
Total sales |  | $ | 1,421 |  |  | $ | 2,485 |  |  | $ | 1,830 |  |  | $ | 1,423 |  |  | $ | 7,159 |
Profit and loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income (loss) |  | $ | 1 |  |  | $ | (9 | ) |  | $ | (4 | ) |  | $ | — |  |  | $ | (12 | )
Depreciation, depletion, and amortization |  |  | 109 |  |  |  | 135 |  |  |  | 57 |  |  |  | 40 |  |  |  | 341 |
Income taxes |  |  | 14 |  |  |  | 1 |  |  |  | 39 |  |  |  | 84 |  |  |  | 138 |
ATOI |  |  | 58 |  |  |  | 39 |  |  |  | 81 |  |  |  | 173 |  |  |  | 351 |
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 | ) |  |  | 51 |  |  |  | 73 |  |  |  | 110 |
ATOI |  |  | 35 |  |  |  | 10 |  |  |  | 102 |  |  |  | 157 |  |  |  | 304 |
Schedule of Segment ATOI to Consolidated Net Income Attributable to Alcoa | The following table reconciles total segment ATOI to consolidated net income attributable to Alcoa:
|  | First quarter ended March 31, |
|  | 2013 |  |  | 2012 |
Total segment ATOI |  | $ | 351 |  |  | $ | 304 |
Unallocated amounts (net of tax): |  |  |  |  |  |  |  |
Impact of LIFO |  |  | (2 | ) |  |  | — |
Interest expense |  |  | (75 | ) |  |  | (80 | )
Noncontrolling interests |  |  | (21 | ) |  |  | (5 | )
Corporate expense |  |  | (67 | ) |  |  | (64 | )
Restructuring and other charges |  |  | (5 | ) |  |  | (7 | )
Other |  |  | (32 | ) |  |  | (54 | )
Consolidated net income attributable to Alcoa |  | $ | 149 |  |  | $ | 94 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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