Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents (O)	$ 1,113	$ 1,358
Receivables from customers	830	811
Other receivables	173	232
Inventories (I)	1,644	1,453
Fair value of derivative instruments (O)	73	113
Prepaid expenses and other current assets	301	271
Total current assets	4,134	4,238
Properties, plants, and equipment, net (J)	8,327	9,138
Investments (H)	1,360	1,410
Deferred income taxes (P)	560	814
Fair value of derivative instruments (O)	82	128
Other noncurrent assets (S)	1,475	1,719
Total Assets	15,938	17,447
Current liabilities:
Accounts payable, trade	1,663	1,898
Accrued compensation and retirement costs	400	459
Taxes, including income taxes	426	282
Fair value of derivative instruments (O)	82	185
Other current liabilities (C)	347	412
Long-term debt due within one year (L & O)	1	16
Total current liabilities	2,919	3,252
Long-term debt, less amount due within one year (L & O)	1,801	1,388
Accrued pension benefits (N)	1,407	2,341
Accrued other postretirement benefits (N)	868	1,100
Asset retirement obligations (Q)	529	617
Environmental remediation (R)	236	258
Fair value of derivative instruments (O)	261	1,105
Noncurrent income taxes (P)	301	309
Other noncurrent liabilities and deferred credits (S)	222	279
Total liabilities	8,544	10,649
Contingencies and commitments (R)
Alcoa Corporation shareholders’ equity:
Common stock (M)	2	2
Additional capital	9,611	9,590
Retained earnings	341	113
Accumulated other comprehensive loss (G)	(4,565)	(5,182)
Total Alcoa Corporation shareholders’ equity	5,389	4,523
Noncontrolling interest (A)	2,005	2,275
Total equity	7,394	6,798
Total Liabilities and Equity	$ 15,938	$ 17,447