Statement of Combined Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total Sales	$ 1,187	$ 1,923	$ 2,798	$ 3,764
Cost of goods sold (exclusive of expenses below)	1,046	1,671	2,373	3,267
Selling, general administrative, and other expenses	55	87	135	173
Research and development expenses	8	11	19	25
Provision for depreciation and amortization	68	64	128	127
Restructuring and other charges (E)	77	38	58	40
Operating (loss) income	(67)	52	85	132
Interest expense	40	29	75	57
Other expenses (income), net (F)	16	10	42	(4)
(Loss) Income before income taxes	(123)	13	(32)	79
(Benefit) Provision for income taxes (H)	(31)	8	0	33
Net (loss) income	(92)	5	(32)	46
Less: Net income attributable to noncontrolling interest	0	0	0	0
Net (loss) income attributable to Arconic Corporation	$ (92)	$ 5	$ (32)	$ 46
Earnings per Share Attributable to Arconic Corporation Common Shareholders (I):
Basic (in dollars per share)	$ (0.84)	$ 0.04	$ (0.29)	$ 0.42
Diluted (in dollars per share)	$ (0.84)	$ 0.04	$ (0.29)	$ 0.42
Sales to unrelated parties
Total Sales	$ 1,165	$ 1,874	$ 2,741	$ 3,663
Sales to related parties
Total Sales	$ 22	$ 49	$ 57	$ 101