Statement of Consolidated Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash from Operations
Net income (loss)	$ 24	$ (773)	$ 38
Adjustments to reconcile net income (loss) to cash from operations:
Depreciation, depletion, and amortization	642	632	617
Deferred income taxes (Q)	23	(22)	219
Equity (income) loss, net of dividends (H)	(2)	201	4
Restructuring and other charges, net (D)	341	184	696
Net loss from investing activities - asset sales (U)	37	18	10
Net periodic pension benefit cost (O)	10	6	54
Stock-based compensation (N)	36	35	40
(Gain) loss on mark-to-market derivative financial contracts	(8)	26	(44)
Other	34	78	53
Changes in assets and liabilities, excluding effects of divestitures and foreign currency translation adjustments:
(Increase) decrease in receivables	(493)	104	(59)
Decrease (increase) in inventories (J)	51	243	(547)
(Increase) decrease in prepaid expenses and other current assets	(68)	39	44
Increase (decrease) in accounts payable, trade	190	(74)	189
Decrease in accrued expenses	(108)	(133)	(173)
Increase (decrease) in taxes, including income taxes	95	(146)	(152)
Pension contributions (O)	(16)	(24)	(17)
Increase in noncurrent assets	(4)	(210)	(87)
Decrease in noncurrent liabilities	(162)	(93)	(63)
Cash provided from operations	622	91	822
Financing Activities
Additions to debt (M)	1,032	127	4
Payments on debt (M)	(679)	(72)	(1)
Proceeds from the exercise of employee stock options (N)	0	1	22
Repurchase of common stock (N)	0	0	(500)
Dividends paid on Alcoa preferred stock (N)	(1)	0	0
Dividends paid on Alcoa common stock (N)	(89)	(72)	(72)
Payments related to tax withholding on stock-based compensation awards	(15)	(34)	(19)
Financial contributions for the divestiture of businesses (C)	(35)	(52)	(33)
Contributions from noncontrolling interest (A)	65	188	214
Distributions to noncontrolling interest (A)	(49)	(30)	(379)
Acquisition of noncontrolling interest (C)	(23)	0	0
Other	(5)	1	(4)
Cash provided from (used for) financing activities	201	57	(768)
Investing Activities
Capital expenditures	(580)	(531)	(480)
Proceeds from the sale of assets and businesses (C)	3	4	5
Additions to investments (H)	(37)	(70)	(32)
Sale of investments (H)	0	0	10
Other	6	12	2
Cash used for investing activities	(608)	(585)	(495)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(28)	10	(9)
Net change in cash and cash equivalents and restricted cash	187	(427)	(450)
Cash and cash equivalents and restricted cash at beginning of year	1,047	1,474	1,924
Cash and cash equivalents and restricted cash at end of year	$ 1,234	$ 1,047	$ 1,474