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Goodwill And Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill And Other Intangible Assets [Abstract]

Changes In The Carrying Amount Of Goodwill

		Alumina				Primary Metals				Flat- Rolled Products				Engineered Products and Solutions				Corporate*				Total
Balance at December 31, 2009:
Goodwill		$	17			$	939			$	210			$	2,532			$	1,384			$	5,082
Accumulated impairment losses			-				-				-				(28	)			-				(28	)
			17				939				210				2,504				1,384				5,054
Acquisition of businesses			-				48				-				28				-				76
Translation			(5	)			6				(3	)			(9	)			3				(8	)
Balance at December 31, 2010:
Goodwill			12				993				207				2,551				1,387				5,150
Accumulated impairment losses			-				-				-				(28	)			-				(28	)
			12				993				207				2,523				1,387				5,122
Acquisition of businesses			-				-				-				150				-				150
Translation			(1	)			(2	)			1				(7	)			(12	)			(21	)
Balance at December 31, 2011:
Goodwill			11				991				208				2,694				1,375				5,279
Accumulated impairment losses			-				-				-				(28	)			-				(28	)
		$	11			$	991			$	208			$	2,666			$	1,375			$	5,251

* As of December 31, 2011, $1,349 of the amount reflected in Corporate is allocated to each of Alcoa's four reportable segments ($163 to Alumina, $850 to Primary Metals, $63 to Flat-Rolled Products, and $273 to Engineered Products and Solutions) included in the table above for purposes of impairment testing (see Note A). This goodwill is reflected in Corporate for segment reporting purposes because it is not included in management's assessment of performance by the four reportable segments.

Other Intangible Assets

December 31, 2011		Gross carrying amount				Accumulated amortization
Computer software		$	902			$	(595	)
Patents and licenses			148				(85	)
Other intangibles			72				(25	)
Total amortizable intangible assets			1,122				(705	)
Indefinite-lived trade names, trademarks, and customer relationships			77				-
Total other intangible assets		$	1,199			$	(705	)
December 31, 2010		Gross carrying amount				Accumulated amortization
Computer software		$	936			$	(555	)
Patents and licenses			148				(80	)
Other intangibles			68				(28	)
Total amortizable intangible assets			1,152				(663	)
Indefinite-lived trade names and trademarks			35				-
Total other intangible assets		$	1,187			$	(663	)

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Other Intangible Assets [Text Block]

+ References

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- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13854-109267



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph c

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-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 Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 47

-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.

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