Statement of Consolidated Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Sales (I)	$ 5,454	$ 5,833
Cost of goods sold (exclusive of expenses below)	4,495	4,847
Selling, general administrative, and other expenses	236	251
Research and development expenses	51	45
Provision for depreciation, depletion, and amortization	340	361
Restructuring and other charges (D)	461	7
Interest expense	120	115
Other expenses (income), net (H)	25	(27)
Total costs and expenses	5,728	5,599
(Loss) income before income taxes	(274)	234
(Benefit) provision for income taxes (K)	(77)	64
Net (loss) income	(197)	170
Less: Net (loss) income attributable to noncontrolling interests	(19)	21
NET (LOSS) INCOME ATTRIBUTABLE TO ALCOA	$ (178)	$ 149
EARNINGS PER SHARE ATTRIBUTABLE TO ALCOA COMMON SHAREHOLDERS (J):
Basic	$ (0.16)	$ 0.14
Diluted	$ (0.16)	$ 0.13
Dividends paid per common share	$ 0.03	$ 0.03