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Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | $ 23,656 | $ 22,457 | $ 22,042
Duke Energy Carolinas |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 6,892 | 7,136 | 6,255
Duke Energy Carolinas | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 638 | 812 | 823
Duke Energy Carolinas | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 54 | 44 | 34
Duke Energy Carolinas | Joint Dispatch Agreement (JDA) revenue | Duke Energy Progress |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 349 | 187 | 177
Related party transaction, other revenues from transactions with related party | 119 | 35 | 34
Duke Energy Carolinas | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 6 | 12 | 11
Progress Energy |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 10,804 | 10,234 | 10,485
Progress Energy | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 591 | 709 | 736
Progress Energy | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 63 | 57 | 47
Progress Energy | Joint Dispatch Agreement (JDA) revenue | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 119 | 35 | 34
Related party transaction, other revenues from transactions with related party | 349 | 187 | 177
Progress Energy | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 76 | 75 | 75
Duke Energy Progress |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5,553 | 5,316 | 5,041
Duke Energy Progress | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 342 | 426 | 434
Duke Energy Progress | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 26 | 23 | 20
Duke Energy Progress | Joint Dispatch Agreement (JDA) revenue | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 119 | 35 | 34
Related party transaction, other revenues from transactions with related party | 349 | 187 | 177
Duke Energy Progress | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 76 | 75 | 75
Duke Energy Florida |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5,237 | 4,898 | 5,426
Duke Energy Florida | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 249 | 283 | 302
Duke Energy Florida | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 37 | 34 | 27
Duke Energy Ohio |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 2,213 | 1,968 | 1,983
Duke Energy Ohio | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 260 | 304 | 294
Duke Energy Ohio | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 6 | 6 | 5
Duke Energy Indiana |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 2,760 | 2,361 | 2,655
Duke Energy Indiana | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 293 | 355 | 365
Duke Energy Indiana | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 9 | 10 | 8
Piedmont |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 1,541 | 1,098 | 1,066
Piedmont | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 143 | 166 | 149
Piedmont | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5 | 4 | 4
Piedmont | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, other revenues from transactions with related party | 82 | 87 | 86
Piedmont | Natural gas storage and transportation costs | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | $ 22 | $ 23 | $ 24

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