Acquisitions and Divestitures	12 Months Ended
Dec. 31, 2013
Business Combinations [Abstract]
Acquisitions and Divestitures	F. Acquisitions and Divestitures Pro forma results of the Company, assuming all acquisitions described below were made at the beginning of the earliest prior period presented, would not have been materially different from the results reported. 2012 Divestitures. In November 2012, Alcoa completed the sale of its 351-megawatt Tapoco Hydroelectric Project (“Tapoco”) to Brookfield Renewable Energy Partners for $597 in cash. Alcoa recognized a gain of $320 ($173 after-tax) in Other income, net on the accompanying Statement of Consolidated Operations, of which a gain of $426 ($275 after-tax) was reflected in the Primary Metals segment and a loss of $106 ($102 after-tax) was reflected in Corporate. The amount in Corporate represents the write-off of goodwill and capitalized interest related to Tapoco that were not included in the assets of the Primary Metals segment. This transaction is no longer subject to post-closing adjustments. Tapoco is a four-station hydroelectric project located on the Little Tennessee and Cheoah Rivers in eastern Tennessee and western North Carolina. The transaction included four generating stations and dams, 86 miles of transmission lines, and approximately 14,500 acres of land associated with and surrounding Tapoco. The power generated by Tapoco was primarily consumed by Alcoa’s smelter in Tennessee, which was temporarily idled in 2009 and permanently shut down in 2011. Since 2009, the power generated from Tapoco was sold into the open market. Prior to November 2012, the carrying value of the assets sold, which consisted of properties, plants, and equipment and intangible assets, along with an allocation of goodwill ($94) from the Primary Metals reporting unit, were classified as held for sale. 2011 Acquisitions. On March 9, 2011, Alcoa completed an acquisition of the aerospace fastener business of TransDigm Group Inc. for $240 (cash acquired and post-closing adjustments resulted in a net purchase price of $239). This business is a leading global designer, producer, and supplier of highly engineered aircraft components, with three locations (one in the state of California and two in the United Kingdom) that employ a combined 400 people. Specifically, this business provides a wide variety of high-strength, high temperature nickel alloy specialty engine fasteners, airframe bolts, and slotted entry bearings. In 2010, this business generated sales of $61. The assets and liabilities of this business were included in the Engineered Products and Solutions segment as of March 31, 2011; this business’ results of operations were included in this segment beginning March 9, 2011. Based on the preliminary purchase price allocation, goodwill of $154 was recorded for this transaction. In 2012, the purchase price allocation was finalized based on the completion of a valuation study resulting in a $1 reduction of the initial goodwill amount. Approximately $60 of goodwill is deductible for income tax purposes. No other intangible assets were identified as a result of the final valuation. This transaction is no longer subject to post-closing adjustments. This acquisition is part of a strategic plan to accelerate the growth of Alcoa’s fastener business, while adding efficiencies, broadening the existing technology base, and expanding product offerings to better serve customers and increase shareholder value. Contingent Payments. In connection with the 2005 acquisition of two fabricating facilities in Russia, Alcoa could be required to make contingent payments of approximately $50 through 2015 based upon the achievement of various financial and operating targets. Any such payment would be reflected as additional goodwill.

F. Acquisitions and Divestitures

Pro forma results of the Company, assuming all acquisitions described below were made at the beginning of the earliest prior period presented, would not have been materially different from the results reported.

2012 Divestitures. In November 2012, Alcoa completed the sale of its 351-megawatt Tapoco Hydroelectric Project (“Tapoco”) to Brookfield Renewable Energy Partners for $597 in cash. Alcoa recognized a gain of $320 ($173 after-tax) in Other income, net on the accompanying Statement of Consolidated Operations, of which a gain of $426 ($275 after-tax) was reflected in the Primary Metals segment and a loss of $106 ($102 after-tax) was reflected in Corporate. The amount in Corporate represents the write-off of goodwill and capitalized interest related to Tapoco that were not included in the assets of the Primary Metals segment. This transaction is no longer subject to post-closing adjustments. Tapoco is a four-station hydroelectric project located on the Little Tennessee and Cheoah Rivers in eastern Tennessee and western North Carolina. The transaction included four generating stations and dams, 86 miles of transmission lines, and approximately 14,500 acres of land associated with and surrounding Tapoco. The power generated by Tapoco was primarily consumed by Alcoa’s smelter in Tennessee, which was temporarily idled in 2009 and permanently shut down in 2011. Since 2009, the power generated from Tapoco was sold into the open market. Prior to November 2012, the carrying value of the assets sold, which consisted of properties, plants, and equipment and intangible assets, along with an allocation of goodwill ($94) from the Primary Metals reporting unit, were classified as held for sale.

2011 Acquisitions. On March 9, 2011, Alcoa completed an acquisition of the aerospace fastener business of TransDigm Group Inc. for $240 (cash acquired and post-closing adjustments resulted in a net purchase price of $239). This business is a leading global designer, producer, and supplier of highly engineered aircraft components, with three locations (one in the state of California and two in the United Kingdom) that employ a combined 400 people. Specifically, this business provides a wide variety of high-strength, high temperature nickel alloy specialty engine fasteners, airframe bolts, and slotted entry bearings. In 2010, this business generated sales of $61. The assets and liabilities of this business were included in the Engineered Products and Solutions segment as of March 31, 2011; this business’ results of operations were included in this segment beginning March 9, 2011. Based on the preliminary purchase price allocation, goodwill of $154 was recorded for this transaction. In 2012, the purchase price allocation was finalized based on the completion of a valuation study resulting in a $1 reduction of the initial goodwill amount. Approximately $60 of goodwill is deductible for income tax purposes. No other intangible assets were identified as a result of the final valuation. This transaction is no longer subject to post-closing adjustments. This acquisition is part of a strategic plan to accelerate the growth of Alcoa’s fastener business, while adding efficiencies, broadening the existing technology base, and expanding product offerings to better serve customers and increase shareholder value.

Contingent Payments. In connection with the 2005 acquisition of two fabricating facilities in Russia, Alcoa could be required to make contingent payments of approximately $50 through 2015 based upon the achievement of various financial and operating targets. Any such payment would be reflected as additional goodwill.