Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,555	$ 1,861
Receivables from customers, less allowances of $35 in 2013 and $39 in 2012 (K)	1,680	1,399
Other receivables (K)	338	340
Inventories (D)	2,982	2,825
Prepaid expenses and other current assets	1,213	1,275
Total current assets	7,768	7,700
Properties, plants, and equipment	38,378	38,137
Less: accumulated depreciation, depletion, and amortization	19,422	19,190
Properties, plants, and equipment, net	18,956	18,947
Goodwill	5,123	5,170
Investments	1,862	1,860
Deferred income taxes	3,717	3,790
Other noncurrent assets	2,680	2,712
Total assets	40,106	40,179
Current liabilities:
Short-term borrowings (E)	51	53
Commercial paper	104
Accounts payable, trade	2,860	2,702
Accrued compensation and retirement costs	932	1,058
Taxes, including income taxes	438	366
Other current liabilities	1,090	1,298
Long-term debt due within one year	1,025	465
Total current liabilities	6,500	5,942
Long-term debt, less amount due within one year	7,745	8,311
Accrued pension benefits	3,626	3,722
Accrued other postretirement benefits	2,578	2,603
Other noncurrent liabilities and deferred credits	2,883	3,078
Total liabilities	23,332	23,656
CONTINGENCIES AND COMMITMENTS (F)
Alcoa shareholders' equity:
Preferred stock	55	55
Common stock	1,178	1,178
Additional capital	7,508	7,560
Retained earnings	11,805	11,689
Treasury stock, at cost	(3,816)	(3,881)
Accumulated other comprehensive loss (B)	(3,309)	(3,402)
Total Alcoa shareholders' equity	13,421	13,199
Noncontrolling interests	3,353	3,324
Total equity	16,774	16,523
Total liabilities and equity	$ 40,106	$ 40,179