XML 36 R25.htm IDEA: XBRL DOCUMENT
v3.23.1

(Loss) Earnings Per Share (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Earnings Per Share [Abstract] |
Basic and diluted earnings (loss) per share and securities excluded from the calculation of diluted EPS | The following table shows the basic and diluted (loss) earnings per share:
| For the three months ended March 31,
| 2023 |  | 2022
| Net Loss |  | Shares (in millions) |  | Per Share |  | Net Income |  | Shares (in millions) |  | Per Share
Net (loss) income | $ | (38.6) |  |  |  |  |  |  | $ | 17.7 |  |  |  |  |
Less: net income allocated to participating securities | — |  |  |  |  |  |  | 1.1 |  |  |  |  |
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net (loss) income allocated to common stockholders | $ | (38.6) |  |  | 92.3 |  |  | $ | (0.42) |  |  | $ | 16.6 |  |  | 91.2 |  |  | $ | 0.18 |
Effect of Dilutive Securities(1): |  |  |  |  |  |  |  |  |  |  |
Share-based compensation | — |  |  | — |  |  |  |  | — |  |  | 1.1 |  |  |
Convertible senior notes | — |  |  | — |  |  |  |  | 0.7 |  |  | 4.8 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net (loss) income allocated to common stockholders with assumed conversion | $ | (38.6) |  |  | 92.3 |  |  | $ | (0.42) |  |  | $ | 17.3 |  |  | 97.1 |  |  | $ | 0.18 |
|  |  | Three months ended March 31, |  |
Securities excluded from the calculation of diluted EPS (in millions)(1): |  |  |  |  | 2023 |  | 2022 |  |  |  |
Share-based compensation - TVPSU |  |  |  |  | 0.6 |  |  | — |  |  |  |  |
Share-based compensation - PSU |  |  |  |  | 0.3 |  |  | 0.7 |  |  |  |  |
Convertible preferred shares |  |  |  |  | 5.4 |  |  | 5.9 |  |  |  |  |
Convertible notes |  |  |  |  | 4.6 |  |  | — |  |  |  |  |
(1) In periods when we report a net loss, all share-based compensation awards, convertible preferred shares and convertible senior notes are excluded from the calculation of diluted weighted average shares outstanding because of their anti-dilutive effect on earnings (loss) per share.

X
- Definition Schedule of Earnings Per Share, Basic and Diluted and Antidilutive Securities Excluded from Computation + References No definition available. + Details
Name: | cenx_ScheduleOfEarningsPerShareBasicAndDilutedAndAntidilutiveSecuritiesExcludedFromComputationTableTextBlock
Namespace Prefix: | cenx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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