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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Reconciliation of NRG's basic and diluted earnings per share | The reconciliation of NRG's basic and diluted income per share is shown in the following table:
| Three months ended June 30, |  |  |  | Six months ended June 30, |  |
(In millions, except per share data) | 2020 |  | 2019 |  | 2020 |  | 2019
Basic income per share: |  |  |  |  |  |  |
Net income available to common shareholders | $ | 313 |  |  | $ | 201 |  |  | $ | 434 |  |  | $ | 683 |
Weighted average number of common shares outstanding - basic | 245 |  |  | 265 |  |  | 246 |  |  | 272 |
Income per weighted average common share — basic | $ | 1.28 |  |  | $ | 0.76 |  |  | $ | 1.76 |  |  | $ | 2.51 |
Diluted income per share: |  |  |  |  |  |  |
Net income available to common shareholders | $ | 313 |  |  | $ | 201 |  |  | $ | 434 |  |  | $ | 683 |
Weighted average number of common shares outstanding - basic | 245 |  |  | 265 |  |  | 246 |  |  | 272 |
Incremental shares attributable to the issuance of equity compensation (treasury stock method) | 1 |  |  | 2 |  |  | 1 |  |  | 2 |
Weighted average number of common shares outstanding - dilutive | 246 |  |  | 267 |  |  | 247 |  |  | 274 |
Income per weighted average common share — diluted | $ | 1.27 |  |  | $ | 0.75 |  |  | $ | 1.76 |  |  | $ | 2.49 |

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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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