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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Reconciliation Of Information Used To Compute Basic And Diluted EPS

		First quarter ended March  31,
		2012				2011
Income from continuing operations attributable to Alcoa common shareholders		$	94			$	309
Less: preferred stock dividends declared			1				1
Income from continuing operations available to common equity			93				308
Less: dividends and undistributed earnings allocated to participating securities			—				1
Income from continuing operations available to Alcoa common shareholders – basic			93				307
Add: interest expense related to convertible notes			8				8
Income from continuing operations available to Alcoa common shareholders – diluted		$	101			$	315
Average shares outstanding – basic			1,066				1,052
Effect of dilutive securities:
Stock options			4				9
Stock and performance awards			5				3
Convertible notes			89				89
Average shares outstanding – diluted			1,164				1,153

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- Definition

Disclosure of the description and amount of each reconciling item used to derive the numerator and denominator for the calculation of an entity's basic and diluted earnings per share.

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No definition available.

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