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Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Schedule Of Earnings Per Share | The following table presents Duke Energy’s basic and diluted EPS calculations and reconciles the weighted average number of common shares outstanding to the diluted weighted average number of common shares outstanding.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions, except per-share amounts) | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Income from continuing operations attributable to Duke Energy common stockholders excluding impact of participating securities | $ | 1,077 |  |  | $ | 954 |  |  | $ | 2,199 |  |  | $ | 2,356 |
Weighted average shares outstanding – basic | 713 |  |  | 700 |  |  | 705 |  |  | 700 |
Equity Forwards | 1 |  |  | — |  |  | 1 |  |  | — |
Weighted average shares outstanding – diluted | 714 |  |  | 700 |  |  | 706 |  |  | 700 |
Earnings per share from continuing operations attributable to Duke Energy common stockholders |  |  |  |  |  |  |
Basic | $ | 1.51 |  |  | $ | 1.36 |  |  | $ | 3.12 |  |  | $ | 3.37 |
Diluted | $ | 1.51 |  |  | $ | 1.36 |  |  | $ | 3.11 |  |  | $ | 3.37 |
Potentially dilutive items excluded from the calculation(a) | 2 |  |  | 2 |  |  | 2 |  | 2
Dividends declared per common share | $ | 0.9275 |  |  | $ | 0.89 |  |  | $ | 2.7075 |  |  | $ | 2.60 |
(a) | Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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