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Income Taxes (Income Taxes Paid) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | $ 58 |  |
Transferrable Credits – purchased/(sold) | (676) |  |
Total Federal | (618) |  |
Total State | (7) |  |
Total Income Taxes Paid (net of refunds) | (625) | $ (400) | $ 1
North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | (4) |  |
South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 1 |  |
Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | (4) |  |
Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Carolinas |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 561 |  |
Transferrable Credits – purchased/(sold) | (551) |  |
Total Federal | 10 |  |
Total State | 75 |  |
Total Income Taxes Paid (net of refunds) | 85 | (85) | 151
Duke Energy Carolinas | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 39 |  |
Duke Energy Carolinas | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 36 |  |
Duke Energy Carolinas | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Carolinas | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Carolinas | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Carolinas | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Carolinas | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Progress Energy |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 424 |  |
Transferrable Credits – purchased/(sold) | (171) |  |
Total Federal | 253 |  |
Total State | 12 |  |
Total Income Taxes Paid (net of refunds) | 265 | 315 | 310
Progress Energy | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 7 |  |
Progress Energy | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Progress Energy | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 5 |  |
Progress Energy | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Progress Energy | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Progress Energy | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Progress Energy | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Progress |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 211 |  |
Transferrable Credits – purchased/(sold) | (102) |  |
Total Federal | 109 |  |
Total State | 11 |  |
Total Income Taxes Paid (net of refunds) | 120 | 192 | 73
Duke Energy Progress | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 9 |  |
Duke Energy Progress | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 2 |  |
Duke Energy Progress | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Progress | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Progress | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Progress | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Progress | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 202 |  |
Transferrable Credits – purchased/(sold) | (69) |  |
Total Federal | 133 |  |
Total State | 34 |  |
Total Income Taxes Paid (net of refunds) | 167 | 270 | 219
Duke Energy Florida | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 34 |  |
Duke Energy Florida | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Florida | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 100 |  |
Transferrable Credits – purchased/(sold) | 0 |  |
Total Federal | 100 |  |
Total State | 3 |  |
Total Income Taxes Paid (net of refunds) | 103 | (79) | 58
Duke Energy Ohio | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 3 |  |
Duke Energy Ohio | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Ohio | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 182 |  |
Transferrable Credits – purchased/(sold) | 0 |  |
Total Federal | 182 |  |
Total State | 26 |  |
Total Income Taxes Paid (net of refunds) | 208 | (80) | 90
Duke Energy Indiana | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 26 |  |
Duke Energy Indiana | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Duke Energy Indiana | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Internal Revenue Service – payments/(refunds) | 55 |  |
Transferrable Credits – purchased/(sold) | 0 |  |
Total Federal | 55 |  |
Total State | 0 |  |
Total Income Taxes Paid (net of refunds) | 55 | $ 48 | $ 28
Piedmont | North Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | South Carolina |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | Florida |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | Indiana |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | Kentucky |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | Oklahoma |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | 0 |  |
Piedmont | Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Total State | $ 0 |  |

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