Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents (X)	$ 1,877	$ 1,437
Receivables from customers, less allowances of $14 in 2014 and $20 in 2013 (U)	1,395	1,221
Other receivables (U)	733	597
Inventories (G)	3,082	2,705
Prepaid expenses and other current assets	1,182	1,009
Total current assets	8,269	6,969
Properties, plants, and equipment, net (H)	16,426	17,639
Goodwill (A & E)	5,247	3,415
Investments (I)	1,944	1,907
Deferred income taxes (T)	2,754	3,184
Other noncurrent assets (J)	2,759	2,628
Total Assets	37,399	35,742
Current liabilities:
Short-term borrowings (K & X)	54	57
Accounts payable, trade	3,152	2,960
Accrued compensation and retirement costs	937	1,013
Taxes, including income taxes	348	376
Other current liabilities	1,021	1,044
Long-term debt due within one year (K & X)	29	655
Total current liabilities	5,541	6,105
Long-term debt, less amount due within one year (K & X)	8,769	7,607
Accrued pension benefits (W)	3,291	3,183
Accrued other postretirement benefits (W)	2,155	2,354
Other noncurrent liabilities and deferred credits (L)	2,849	2,971
Total liabilities	22,605	22,220
Contingencies and commitments (N)
Alcoa shareholders' equity:
Preferred stock (R)	55	55
Mandatory convertible preferred stock (R)	3
Common stock (R)	1,304	1,178
Additional capital	9,284	7,509
Retained earnings	9,379	9,272
Treasury stock, at cost	(3,042)	(3,762)
Accumulated other comprehensive loss (B)	(4,667)	(3,659)
Total Alcoa shareholders' equity	12,306	10,593
Noncontrolling interests (M)	2,488	2,929
Total equity	14,794	13,522
Total Liabilities and Equity	$ 37,399	$ 35,742