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Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | $ 22,042 | $ 22,778 | $ 19,133
Duke Energy Carolinas |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 6,255 | 5,799 | 5,449
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 | 823 | 838 | 894
Duke Energy Carolinas | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 34 | 28 | 24
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 | 177 | 600 | 207
Related party transaction, other revenues from transactions with related party | 34 | 109 | 41
Duke Energy Carolinas | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 11 | 12 | 11
Progress Energy |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 10,485 | 10,297 | 8,666
Progress Energy | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 736 | 818 | 856
Progress Energy | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 47 | 43 | 41
Progress Energy | Joint Dispatch Agreement (JDA) revenue | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 34 | 109 | 41
Related party transaction, other revenues from transactions with related party | 177 | 600 | 207
Progress Energy | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 75 | 76 | 75
Duke Energy Progress |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5,041 | 5,351 | 4,564
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 | 434 | 469 | 504
Duke Energy Progress | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 20 | 20 | 19
Duke Energy Progress | Joint Dispatch Agreement (JDA) revenue | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 34 | 109 | 41
Related party transaction, other revenues from transactions with related party | 177 | 600 | 207
Duke Energy Progress | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 75 | 76 | 75
Duke Energy Florida |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5,426 | 4,933 | 4,087
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 | 302 | 349 | 352
Duke Energy Florida | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 27 | 23 | 22
Duke Energy Ohio |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 1,983 | 2,124 | 1,711
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 | 294 | 334 | 329
Duke Energy Ohio | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 5 | 5 | 4
Duke Energy Indiana |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 2,655 | 3,656 | 2,432
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 | 365 | 447 | 409
Duke Energy Indiana | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 8 | 8 | 8
Piedmont |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 1,066 | 1,680 | 1,174
Piedmont | Corporate governance and shared service expenses | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 149 | 155 | 139
Piedmont | Indemnification coverages | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | 4 | 3 | 3
Piedmont | Intercompany natural gas transactions | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, other revenues from transactions with related party | 86 | 88 | 86
Piedmont | Natural gas storage and transportation costs | Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, expenses from transactions with related party | $ 24 | $ 23 | $ 22

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