Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Data

Supplemental Financial Information (unaudited)

Quarterly Data

(in millions, except per-share amounts)

	First			Second		Third		Fourth*			Year
2015
Sales	$	5,819		$	5,897	$	5,573	$	5,245		$	22,534
Net income (loss) attributable to Alcoa	$	195		$	140	$	44	$	(701	)	$	(322	)
Earnings per share attributable to Alcoa common shareholders**:
Basic	$	0.15		$	0.10	$	0.02	$	(0.55	)	$	(0.31	)
Diluted	$	0.14		$	0.10	$	0.02	$	(0.55	)	$	(0.31	)
2014
Sales	$	5,454		$	5,836	$	6,239	$	6,377		$	23,906
Net (loss) income attributable to Alcoa	$	(178	)	$	138	$	149	$	159		$	268
Earnings per share attributable to Alcoa common shareholders**:
Basic	$	(0.16	)	$	0.12	$	0.13	$	0.12		$	0.21
Diluted	$	(0.16	)	$	0.12	$	0.12	$	0.11		$	0.21

* In the fourth quarter of 2015, Alcoa recorded restructuring and other charges of $735 ($507 after-tax and noncontrolling interest), which were primarily related to closures and/or curtailments of a number of smelters and refineries (see Note D) and a charge for legal matters in Italy (see Note N); a discrete income tax charge of $190 for valuation allowances on certain deferred tax assets in the United States and Iceland (see Note T); and an impairment of goodwill of $25 (see Goodwill and Other Intangible Assets in Notes A and E). In the fourth quarter of 2014, Alcoa recorded a net loss of $332 ($163 after-tax and noncontrolling interest) related to the divestiture of four operations (see Notes D and F).

** Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.