Statement of Consolidated Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Sales (Q)	$ 23,032	$ 23,700	$ 24,951
Cost of goods sold (exclusive of expenses below)	19,286	20,401	20,480
Selling, general administrative, and other expenses	1,008	997	1,027
Research and development expenses	192	197	184
Provision for depreciation, depletion, and amortization	1,421	1,460	1,479
Impairment of goodwill (A & E)	1,731
Restructuring and other charges (D)	782	172	281
Interest expense (V)	453	490	524
Other income, net (O)	(25)	(341)	(87)
Total costs and expenses	24,848	23,376	23,888
(Loss) income from continuing operations before income taxes	(1,816)	324	1,063
Provision for income taxes (T)	428	162	255
(Loss) income from continuing operations	(2,244)	162	808
Loss from discontinued operations			(3)
Net (loss) income	(2,244)	162	805
Less: Net income (loss) attributable to noncontrolling interests	41	(29)	194
Net (Loss) Income Attributable to Alcoa	(2,285)	191	611
Amounts Attributable to Alcoa Common Shareholders:
(Loss) income from continuing operations	(2,285)	191	614
Loss from discontinued operations			(3)
Net (Loss) Income Attributable to Alcoa	$ (2,285)	$ 191	$ 611
Basic:
(Loss) income from continuing operations	$ (2.14)	$ 0.18	$ 0.58
Loss from discontinued operations			$ (0.01)
Net (loss) income	$ (2.14)	$ 0.18	$ 0.57
Diluted:
(Loss) income from continuing operations	$ (2.14)	$ 0.18	$ 0.55
Loss from discontinued operations
Net (loss) income	$ (2.14)	$ 0.18	$ 0.55