Statement of Consolidated Cash Flows (unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FROM OPERATIONS
Net (loss) income	$ (546)	$ 458
Adjustments to reconcile net (loss) income to cash from operations:
Depreciation, depletion, and amortization	469	470
Deferred income taxes	(156)	93
Equity loss (income), net of dividends	161	(35)
Restructuring and other charges, net (D)	195	702
Net loss from investing activities - asset sales (R)	18	7
Net periodic pension benefit cost (M)	4	39
Stock-based compensation	27	28
Loss (gain) on mark-to-market derivative financial contracts	31	(84)
Other	67	30
Changes in assets and liabilities, excluding effects of divestitures and foreign currency translation adjustments:
Decrease in receivables	108	23
Decrease (increase) in inventories	166	(580)
Decrease (increase) in prepaid expenses and other current assets	53	(10)
Decrease in accounts payable, trade	(275)	(10)
Decrease in accrued expenses	(119)	(122)
Decrease in taxes, including income taxes	(52)	(103)
Pension contributions (M)	(20)	(12)
Increase in noncurrent assets	(179)	(94)
Decrease in noncurrent liabilities	(59)	(96)
CASH (USED FOR) PROVIDED FROM OPERATIONS	(107)	704
FINANCING ACTIVITIES
Additions to debt	80
Payments on debt	(39)
Proceeds from the exercise of employee stock options	1	22
Repurchase of common stock		(500)
Dividends paid on Alcoa common stock	(54)	(55)
Payments related to tax withholding on stock-based compensation awards	(34)	(19)
Financial contributions for the divestiture of businesses (C)	(44)	(19)
Contributions from noncontrolling interest	164	150
Distributions to noncontrolling interest	(24)	(319)
Other	1	(3)
CASH PROVIDED FROM (USED FOR) FINANCING ACTIVITIES	51	(743)
INVESTING ACTIVITIES
Capital expenditures	(343)	(309)
Proceeds from the sale of assets	2	5
Additions to investments	(51)	(32)
Sale of investments		10
Other	4	2
CASH USED FOR INVESTING ACTIVITIES	(388)	(324)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH		(20)
Net change in cash and cash equivalents and restricted cash	(444)	(383)
Cash and cash equivalents and restricted cash at beginning of year	1,474	1,924
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	$ 1,030	$ 1,541