Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,017	$ 1,861
Receivables from customers, less allowances of $21 in 2013 and $39 in 2012 (K)	1,422	1,399
Other receivables (K)	616	340
Inventories (D)	2,893	2,825
Prepaid expenses and other current assets	1,101	1,275
Total current assets	7,049	7,700
Properties, plants, and equipment	37,326	38,137
Less: accumulated depreciation, depletion, and amortization	19,465	19,190
Properties, plants, and equipment, net	17,861	18,947
Goodwill	5,144	5,170
Investments	1,908	1,860
Deferred income taxes	3,621	3,790
Other noncurrent assets	2,646	2,712
Total assets	38,229	40,179
Current liabilities:
Short-term borrowings (E)	59	53
Accounts payable, trade	2,816	2,702
Accrued compensation and retirement costs	1,019	1,058
Taxes, including income taxes	398	366
Other current liabilities	1,093	1,298
Long-term debt due within one year (E)	655	465
Total current liabilities	6,040	5,942
Long-term debt, less amount due within one year	7,630	8,311
Accrued pension benefits	3,407	3,722
Accrued other postretirement benefits	2,527	2,603
Other noncurrent liabilities and deferred credits	2,761	3,078
Total liabilities	22,365	23,656
CONTINGENCIES AND COMMITMENTS (F)
Alcoa shareholders' equity:
Preferred stock	55	55
Common stock	1,178	1,178
Additional capital	7,536	7,560
Retained earnings	11,611	11,689
Treasury stock, at cost	(3,810)	(3,881)
Accumulated other comprehensive loss (B)	(3,714)	(3,402)
Total Alcoa shareholders' equity	12,856	13,199
Noncontrolling interests	3,008	3,324
Total equity	15,864	16,523
Total liabilities and equity	$ 38,229	$ 40,179