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Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Class of Stock [Line Items] |  |
Net income available to Duke Energy common stockholders | $ 818 | $ 953
Accumulated preferred stock dividends adjustment | 12 | 12
Less: Impact of participating securities | 1 | 1
Income from continuing operations available to Duke Energy common stockholders | $ 829 | $ 964
Weighted average common shares outstanding – basic (in shares) | 770 | 769
Weighted average common shares outstanding – diluted (in shares) | 770 | 769
EPS available to Duke Energy common stockholders |  |
Basic (in usd per share) | $ 1.08 | $ 1.25
Diluted (in usd per share) | $ 1.08 | $ 1.25
Potentially dilutive items excluded from the calculation (in shares) | 2 | 2
Common Stock |  |
EPS available to Duke Energy common stockholders |  |
Dividends declared per common share (in usd per share) | $ 0.985 | $ 0.965
Preferred stock, Series A |  |
EPS available to Duke Energy common stockholders |  |
Dividends declared on preferred stock per depositary share (in usd per share) | $ 0.359 | 0.359
Cumulative dividend rate per annum | 5.75% |
Liquidation preference per share (in usd per share) | $ 25 |
Preferred stock, Series B |  |
EPS available to Duke Energy common stockholders |  |
Dividends declared on preferred stock per depositary share (in usd per share) | $ 24.375 | $ 24.375
Cumulative dividend rate per annum | 4.875% |
Liquidation preference per share (in usd per share) | $ 1,000 |

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