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Loss per share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of calculation of basic and diluted EPS | The components of the numerator for the calculation of basic and diluted LPS are as follows:
| Successor |  |  | Predecessor
(In $ millions) | Year ended December 31, 2020 |  | Year ended December 31, 2019 |  | Period from July 2, 2018 through December 31, 2018 |  |  | Period from January 1, 2018 through July 1, 2018
Net loss attributable to the parent | (4,659) |  |  | (1,219) |  |  | (602) |  |  |  | (3,881) |
Less: Allocation to participating securities | — |  |  | — |  |  | — |  |  |  | — |
Net loss available to stockholders | (4,659) |  |  | (1,219) |  |  | (602) |  |  |  | (3,881) |
Effect of dilution | — |  |  | — |  |  | — |  |  |  | — |
Diluted net loss available to stockholders | (4,659) |  |  | (1,219) |  |  | (602) |  |  |  | (3,881) |
The components of the denominator for the calculation of basic and diluted LPS are as follows:
| Successor |  |  | Predecessor
(In $ millions) | Year ended December 31, 2020 |  | Year ended December 31, 2019 |  | Period from July 2, 2018 through December 31, 2018 |  |  | Period from January 1, 2018 through July 1, 2018
Basic loss per share: |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding | 100 |  |  | 100 |  |  | 100 |  |  |  | 504 |
Diluted loss per share: |  |  |  |  |  |  |  |
Effect of dilution | — |  |  | — |  |  | — |  |  |  | — |
Weighted average number of common shares outstanding adjusted for the effects of dilution | 100 |  |  | 100 |  |  | 100 |  |  |  | 504 |
The basic and diluted loss per share are as follows:
| Successor |  |  | Predecessor
(In $) | Year ended December 31, 2020 |  | Year ended December 31, 2019 |  | Period from July 2, 2018 through December 31, 2018 |  |  | Period from January 1, 2018 through July 1, 2018
Basic loss per share | (46.43) |  |  | (12.18) |  |  | (6.02) |  |  |  | (7.71) |
Diluted loss per share | (46.43) |  |  | (12.18) |  |  | (6.02) |  |  |  | (7.71) |

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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 http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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