Statement of Consolidated Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net income	$ 261	$ 470	$ 642
Adjustments to reconcile net income to cash used for operations:
Depreciation and amortization	338	536	576
Deferred income taxes	2	(19)	31
Restructuring and other charges	164	620	9
Net loss from investing activities - asset sales	8	7	10
Net periodic pension benefit cost (H)	51	115	130
Stock-based compensation	45	60	50
Other	59	13	75
Changes in assets and liabilities, excluding effects of acquisitions, divestitures, and foreign currency translation adjustments:
(Increase) in receivables	(238)	(977)	(1,142)
Decrease (increase) in inventories	74	(3)	(74)
(Increase) decrease in prepaid expenses and other current assets	(2)	4	(1)
(Decrease) increase in accounts payable, trade	(381)	(1)	339
(Decrease) in accrued expenses	(217)	(42)	(190)
Decrease (increase) in taxes, including income taxes	98	(2)	104
Pension contributions	(257)	(268)	(298)
Decrease (increase) in noncurrent assets	39	(7)	(20)
(Decrease) in noncurrent liabilities	(35)	(45)	(24)
Cash provided from operations	9	461	217
Financing Activities
Net change in short-term borrowings (original maturities of three months or less)	(15)	2	(7)
Additions to debt (original maturities greater than three months) (R)	2,400	400	600
Payments on debt (original maturities greater than three months) (R)	(2,043)	(806)	(1,103)
Debt issuance costs (C and R)	(61)	0	0
Premiums paid on early redemption of debt (R)	(59)	0	(17)
Proceeds from exercise of employee stock options	33	56	16
Dividends paid to shareholders	(11)	(57)	(119)
Repurchase of common stock (J)	(73)	(1,150)	0
Net cash transferred to Arconic Corporation at separation	(500)	0	0
Other	(40)	(13)	(19)
Cash used for financing activities	(369)	(1,568)	(649)
Investing Activities
Capital expenditures (A and D)	(267)	(641)	(768)
Proceeds from the sale of assets and businesses (U)	114	103	309
Sales of investments	0	73	9
Cash receipts from sold receivables (M)	422	995	1,016
Other	2	(2)	(1)
Cash provided from Investing Activities	271	528	565
Effect of exchange rates on cash, cash equivalents and restricted cash	(3)	0	(4)
Net change in cash, cash equivalents and restricted cash	(92)	(579)	129
Cash, cash equivalents and restricted cash at beginning of year	1,703	2,282	2,153
Cash, cash equivalents and restricted cash at end of year	$ 1,611	$ 1,703	$ 2,282