Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 1,749	$ 1,939
Receivables from customers, less allowances of $45 in 2012 and $46 in 2011 (J)	1,526	1,571
Other receivables (J)	587	371
Inventories (D)	3,097	2,899
Prepaid expenses and other current assets	924	933
Total current assets	7,883	7,713
Properties, plants, and equipment	38,429	37,820
Less: accumulated depreciation, depletion, and amortization	18,813	18,404
Properties, plants, and equipment, net	19,616	19,416
Goodwill	5,271	5,251
Investments	1,750	1,626
Deferred income taxes	3,615	3,546
Other noncurrent assets	2,568	2,568
Total assets	40,703	40,120
LIABILITIES
Short-term borrowings (E)	722	62
Commercial paper	275	224
Accounts payable, trade	2,734	2,692
Accrued compensation and retirement costs	909	985
Taxes, including income taxes	479	438
Other current liabilities	1,045	1,167
Long-term debt due within one year (E)	128	445
Total current liabilities	6,292	6,013
Long-term debt, less amount due within one year	8,618	8,640
Accrued pension benefits	3,059	3,261
Accrued other postretirement benefits	2,560	2,583
Other noncurrent liabilities and deferred credits	2,548	2,428
Total liabilities	23,077	22,925
CONTINGENCIES AND COMMITMENTS
EQUITY
Preferred stock	55	55
Common stock	1,178	1,178
Additional capital	7,523	7,561
Retained earnings	11,690	11,629
Treasury stock, at cost	(3,898)	(3,952)
Accumulated other comprehensive loss	(2,406)	(2,627)
Total Alcoa shareholders' equity	14,142	13,844
Noncontrolling interests	3,484	3,351
Total equity	17,626	17,195
Total liabilities and equity	$ 40,703	$ 40,120