Consolidated Balance Sheet (unaudited) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents (M)	$ 2,544	$ 1,607
Receivables from customers (I)	587	471
Other receivables	90	85
Inventories (J)	1,417	1,398
Fair value of derivative instruments (M)	15	21
Assets held for sale (C)		648
Prepaid expenses and other current assets	238	290
Total current assets	4,891	4,520
Properties, plants, and equipment	20,199	20,522
Less: accumulated depreciation, depletion, and amortization	13,269	13,332
Properties, plants, and equipment, net	6,930	7,190
Investments (H)	1,055	1,051
Deferred income taxes	653	655
Other noncurrent assets	1,402	1,444
Total assets	14,931	14,860
Current liabilities:
Accounts payable, trade	1,284	1,403
Accrued compensation and retirement costs	365	395
Taxes, including income taxes	92	91
Fair value of derivative instruments (M)	181	103
Liabilities held for sale (C)		242
Other current liabilities	554	525
Long-term debt due within one year (K & M)	745	2
Total current liabilities	3,221	2,761
Long-term debt, less amount due within one year (K & M)	2,214	2,463
Accrued pension benefits (L)	1,393	1,492
Accrued other postretirement benefits (L)	671	744
Asset retirement obligations	596	625
Environmental remediation (P)	278	293
Fair value of derivative instruments (M)	923	742
Noncurrent income taxes	204	209
Other noncurrent liabilities and deferred credits	558	515
Total liabilities	10,058	9,844
CONTINGENCIES AND COMMITMENTS (P)
Alcoa Corporation shareholders’ equity:
Common stock	2	2
Additional capital	9,674	9,663
Accumulated deficit	(550)	(725)
Accumulated other comprehensive loss (G)	(5,878)	(5,629)
Total Alcoa Corporation shareholders’ equity	3,248	3,311
Noncontrolling interest	1,625	1,705
Total equity	4,873	5,016
Total liabilities and equity	$ 14,931	$ 14,860