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(Loss)/Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Reconciliation of NRG's basic and diluted (loss)/income per share | The reconciliation of NRG's basic and diluted (loss)/income per share is shown in the following table:
| Three months ended March 31, |  |
(In millions, except per share data) | 2021 |  | 2020 |  |  |  |
Basic (loss)/income per share: |  |  |  |
Net (loss)/income | $ | (82) |  |  | $ | 121 |  |  |  |  |
Weighted average number of common shares outstanding - basic | 245 |  |  | 248 |  |  |  |  |
(Loss)/income per weighted average common share — basic | $ | (0.33) |  |  | $ | 0.49 |  |  |  |  |
Diluted (loss)/income per share: |  |  |  |
Net (loss)/income | $ | (82) |  |  | $ | 121 |  |  |  |  |
Weighted average number of common shares outstanding - basic | 245 |  |  | 248 |  |  |  |  |
Incremental shares attributable to the issuance of equity compensation (treasury stock method) | — |  |  | 1 |  |  |  |  |
Weighted average number of common shares outstanding - dilutive | 245 |  |  | 249 |  |  |  |  |
(Loss)/income per weighted average common share — diluted | $ | (0.33) |  |  | $ | 0.49 |  |  |  |  |

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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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