Consolidated Balance Sheet (unaudited) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents (J)	$ 1,017	$ 1,113
Receivables from customers	758	830
Other receivables	184	173
Inventories (H)	1,799	1,819
Fair value of derivative instruments (J)	71	73
Prepaid expenses and other current assets (H)	285	320
Total current assets	4,114	4,328
Properties, plants, and equipment	22,015	21,807
Less: accumulated depreciation, depletion, and amortization	13,687	13,480
Properties, plants, and equipment, net	8,328	8,327
Investments (G & M)	1,362	1,360
Deferred income taxes	604	560
Fair value of derivative instruments (J)	68	82
Other noncurrent assets	1,480	1,475
Total assets	15,956	16,132
Current liabilities:
Accounts payable, trade	1,503	1,663
Accrued compensation and retirement costs	383	400
Taxes, including income taxes	395	426
Fair value of derivative instruments (J)	84	82
Other current liabilities	437	347
Long-term debt due within one year (J)	1	1
Total current liabilities	2,803	2,919
Long-term debt, less amount due within one year (J)	1,802	1,801
Accrued pension benefits (I)	1,387	1,407
Accrued other postretirement benefits (I)	851	868
Asset retirement obligations	543	529
Environmental remediation (M)	243	236
Fair value of derivative instruments (J)	580	261
Noncurrent income taxes	300	301
Other noncurrent liabilities and deferred credits	364	222
Total liabilities	8,873	8,544
CONTINGENCIES AND COMMITMENTS (M)
Alcoa Corporation shareholders’ equity:
Common stock	2	2
Additional capital	9,618	9,611
Retained earnings (H)	371	570
Accumulated other comprehensive loss (F)	(4,834)	(4,565)
Total Alcoa Corporation shareholders’ equity	5,157	5,618
Noncontrolling interest (H)	1,926	1,970
Total equity	7,083	7,588
Total liabilities and equity	$ 15,956	$ 16,132