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v3.20.2

Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Duke Energy Carolinas | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | $ 198 | $ 197 | $ 528 | $ 606
Duke Energy Carolinas | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 5 | 5 | 15 | 15
Duke Energy Carolinas | JDA | Duke Energy Progress |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 28 | 32 | 72 | 145
Related party transaction, other revenues from transactions with related party | 6 | 12 | 16 | 52
Duke Energy Carolinas | Intercompany natural gas purchases and sales | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 10 | 0 | 26 | 7
Progress Energy | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 185 | 194 | 520 | 553
Progress Energy | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 9 | 8 | 27 | 27
Progress Energy | JDA | Duke Energy Carolinas |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 6 | 12 | 16 | 52
Related party transaction, other revenues from transactions with related party | 28 | 32 | 72 | 145
Progress Energy | Intercompany natural gas purchases and sales | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 18 | 19 | 56 | 57
Duke Energy Progress | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 113 | 114 | 301 | 328
Duke Energy Progress | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 4 | 3 | 13 | 11
Duke Energy Progress | JDA | Duke Energy Carolinas |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 6 | 12 | 16 | 52
Related party transaction, other revenues from transactions with related party | 28 | 32 | 72 | 145
Duke Energy Progress | Intercompany natural gas purchases and sales | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 18 | 19 | 56 | 57
Duke Energy Florida | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 72 | 80 | 219 | 225
Duke Energy Florida | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 5 | 5 | 14 | 16
Duke Energy Ohio | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 80 | 90 | 241 | 258
Duke Energy Ohio | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 1 | 1 | 3 | 3
Duke Energy Indiana | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 102 | 109 | 300 | 299
Duke Energy Indiana | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 2 | 2 | 6 | 5
Piedmont Natural Gas | Corporate governance and shared service expenses | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 31 | 33 | 102 | 102
Piedmont Natural Gas | Indemnification coverages | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | 1 | 1 | 2 | 2
Piedmont Natural Gas | Intercompany natural gas purchases and sales | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, other revenues from transactions with related party | 28 | 19 | 82 | 64
Piedmont Natural Gas | Natural gas storage and transportation costs | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, expenses from transactions with related party | $ 6 | $ 6 | $ 17 | $ 17

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