Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Reconciliation of Information Used to Compute Basic and Diluted EPS

The information used to compute basic and diluted EPS attributable to Alcoa common shareholders was as follows (shares in millions):

	2015			2014		2013
Net (loss) income attributable to Alcoa	$	(322	)	$	268	$	(2,285	)
Less: preferred stock dividends declared		69			21		2
Net (loss) income available to Alcoa common shareholders—basic		(391	)		247		(2,287	)
Add: dividends related to mandatory convertible preferred stock		-			-		-
Add: interest expense related to convertible notes		-			-		-
Net (loss) income available to Alcoa common shareholders—diluted	$	(391	)	$	247	$	(2,287	)
Average shares outstanding—basic		1,259			1,162		1,070
Effect of dilutive securities:
Stock options		-			7		-
Stock and performance awards		-			11		-
Mandatory convertible preferred stock		-			-		-
Convertible notes		-			-		-
Average shares outstanding—diluted		1,259			1,180		1,070