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Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |
Net Income available to Duke Energy common stockholders | $ 1,270 | $ 3,707 | $ 2,666
Income (Loss) From Discontinued Operations, net of tax | 7 | (7) | 19
Accumulated preferred stock dividends adjustment | 1 | (15) | 0
Less: Impact of participating securities | 2 | 5 | 5
Income from continuing operations available to Duke Energy common stockholders | $ 1,262 | $ 3,694 | $ 2,642
Weighted average common shares outstanding – basic (in shares) | 737 | 729 | 708
Equity forwards (in shares) | 1 | 0 | 0
Weighted average common shares outstanding – diluted (in shares) | 738 | 729 | 708
EPS from continuing operations available to Duke Energy common stockholders |  |  |
Basic and diluted (usd per share) | $ 1.71 | $ 5.07 | $ 3.73
Potentially dilutive items excluded from the calculation(in shares) | 2 | 2 | 2
Dividends declared per share (usd per share) | $ 3.82 | $ 3.75 | $ 3.64
Series A Preferred Stock |  |  |
EPS from continuing operations available to Duke Energy common stockholders |  |  |
Dividends declared on preferred stock (usd per share) | 1.437 | $ 1.03 |
Series B Preferred Stock |  |  |
EPS from continuing operations available to Duke Energy common stockholders |  |  |
Dividends declared on preferred stock (usd per share) | $ 49.292 |  | $ 0

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