v3.20.2

Earnings Per Share | 6 Months Ended
--- | ---
Jun. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share (EPS) amounts are computed by dividing Net (loss) income attributable to Arconic Corporation by the weighted-average number of common shares outstanding. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive share equivalents outstanding. The share information used to compute basic and diluted EPS attributable to Arconic Corporation common shareholders was as follows (shares in millions):
|  | Second quarter ended June 30, |  |  |  | Six months ended June 30, |  |
| ​ | 2020 | ​ | 2019 |  | 2020 | ​ | 2019
Weighted-average shares outstanding – basic | ​ | 109 |  |  | 109 |  |  | 109 |  |  | 109 |
Effect of dilutive share equivalents: | ​ |  |  |  |  |  |  |
Stock options |  | — |  |  | — |  |  | — |  |  | — |
Stock units |  | — |  |  | — |  |  | — |  |  | — |
Weighted-average shares outstanding – diluted |  | 109 |  |  | 109 |  |  | 109 |  |  | 109 |
In the 2020 second quarter and six-month period, basic weighted-average shares outstanding and diluted weighted-average shares outstanding were the same because the effect of common share equivalents was anti-dilutive since Arconic Corporation generated a net loss. Had Arconic Corporation generated net income in the 2020 second quarter and six-month period, 3 million and 1 million common share equivalents, respectively, related to outstanding stock units and stock options would have been included in diluted weighted-average shares outstanding. These common share equivalents do not consider 1 million stock options outstanding as of June 30, 2020 with a weighted average exercise price of $26.05 as the respective exercise price of these options was greater than the average market price of Arconic Corporation’s common stock. Prior to the Separation Date, Arconic Corporation did not have any publicly-traded issued and outstanding common stock or any common share equivalents. Accordingly, in the 2019 second quarter and six-month period, the EPS included on the accompanying Statement of Consolidated Operations was calculated based on the 109,021,376 shares of Arconic Corporation common stock distributed on the Separation Date in connection with the completion of the Separation (see Note A).

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
Name: | us-gaap_EarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration