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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Schedule of Reconciliation of Information Used to Compute Basic and Diluted EPS | The information used to compute basic and diluted EPS attributable to Howmet common shareholders was as follows (shares in millions):
| Second quarter ended |  | Six months ended
| June 30, |  | June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Net income attributable to common shareholders | $ | 147 |  |  | $ | 74 |  |  | $ | 278 |  |  | $ | 154 |
Less: preferred stock dividends declared | — |  |  | — |  |  | 1 |  |  | 1 |
Net income available to Howmet Aerospace common shareholders - basic and diluted | $ | 147 |  |  | $ | 74 |  |  | $ | 277 |  |  | $ | 153 |
Average shares outstanding - basic | 417 |  |  | 432 |  |  | 418 |  |  | 433 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options | — |  |  | 1 |  |  | — |  |  | 1 |
Stock and performance awards | 5 |  |  | 4 |  |  | 5 |  |  | 4 |
Average shares outstanding - diluted | 422 |  |  | 437 |  |  | 423 |  |  | 438 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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