Supplemental Financial Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Data

	First		Second(2)		Third		Fourth		Year
2020
Sales	$	1,634	$	1,253	$	1,134	$	1,238	$	5,259
Income (loss) from continuing operations after income taxes	$	153	$	(84)	$	36	$	106	$	211
Net income (loss) per share from continuing operations attributable to Howmet common shareholders(1):
Net income (loss) from continuing operations - basic	$	0.35	$	(0.19)	$	0.08	$	0.24	$	0.48
Net income (loss) from continuing operations - diluted	$	0.34	$	(0.19)	$	0.08	$	0.24	$	0.48
2019
Sales	$	1,752	$	1,818	$	1,794	$	1,734	$	7,098
Income (loss) from continuing operations after income taxes	$	86	$	(136)	$	58	$	118	$	126
Earnings (loss) per share attributable to Howmet common shareholders(1):
Net income (loss) from continuing operations - basic	$	0.18	$	(0.31)	$	0.13	$	0.27	$	0.28
Net income (loss) from continuing operations - diluted	$	0.18	$	(0.31)	$	0.13	$	0.27	$	0.27

(1)Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.

(2)In the second quarter of 2020, the Company recorded settlement accounting charges of $62 associated with its U.K. pension plan related to the Arconic Inc. Separation Transaction and premium paid on early redemption of debt of $59. In the second quarter of 2019, the Company recorded an impairment charge of $428 related to its Disks business (see Note O).