Consolidated Balance Sheet (unaudited) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents (M)	$ 1,452	$ 1,607
Receivables from customers (I)	769	471
Other receivables	92	85
Inventories (J)	1,702	1,398
Fair value of derivative instruments (M)	19	21
Assets held for sale (C)		648
Prepaid expenses and other current assets	251	290
Total current assets	4,285	4,520
Properties, plants, and equipment	20,111	20,522
Less: accumulated depreciation, depletion, and amortization	13,432	13,332
Properties, plants, and equipment, net	6,679	7,190
Investments (H)	1,146	1,051
Deferred income taxes	698	655
Fair value of derivative instruments (M)	2
Other noncurrent assets	1,387	1,444
Total assets	14,197	14,860
Current liabilities:
Accounts payable, trade	1,482	1,403
Accrued compensation and retirement costs	378	395
Taxes, including income taxes	218	91
Fair value of derivative instruments (M)	299	103
Liabilities held for sale (C)		242
Other current liabilities	551	525
Long-term debt due within one year (K & M)	1	2
Total current liabilities	2,929	2,761
Long-term debt, less amount due within one year (K & M)	1,724	2,463
Accrued pension benefits (L)	633	1,492
Accrued other postretirement benefits (L)	652	744
Asset retirement obligations	554	625
Environmental remediation (P)	260	293
Fair value of derivative instruments (M)	1,278	742
Noncurrent income taxes	182	209
Other noncurrent liabilities and deferred credits	524	515
Total liabilities	8,736	9,844
CONTINGENCIES AND COMMITMENTS (P)
Alcoa Corporation shareholders’ equity:
Common stock	2	2
Additional capital	9,708	9,663
Retained earnings (deficit)	96	(725)
Accumulated other comprehensive loss (G)	(5,928)	(5,629)
Total Alcoa Corporation shareholders’ equity	3,878	3,311
Noncontrolling interest	1,583	1,705
Total equity	5,461	5,016
Total liabilities and equity	$ 14,197	$ 14,860