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Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 GWh Mcf | Jun. 30, 2023 USD ($) GWh Mcf | Dec. 31, 2022 USD ($)
Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 4,127 | $ 2,877
Commodity contracts | Electricity (GWh) |  |  |
Derivative [Line Items] |  |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 14,086 | 28,253 |
Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 909 | 863 |
Designated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 2,100 | 500
Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 2,027 | 2,377
Duke Energy Carolinas | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 550 | 1,250
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 307 | 290 |
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 550 | 1,250
Progress Energy | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 1,250 | 800
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 292 | 280 |
Progress Energy | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 1,250 | 800
Duke Energy Progress | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 250 | 500
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 292 | 280 |
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 250 | 500
Duke Energy Florida | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 1,000 | 300
Duke Energy Florida | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | 1,000 | 300
Duke Energy Indiana | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 200 | 300
Duke Energy Indiana | Commodity contracts | Electricity (GWh) |  |  |
Derivative [Line Items] |  |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 12,266 | 24,787 |
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 11 | 12 |
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 200 | 300
Duke Energy Ohio | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 27 | 27
Duke Energy Ohio | Commodity contracts | Electricity (GWh) |  |  |
Derivative [Line Items] |  |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 1,820 | 3,466 |
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount |  | $ 27 | $ 27
Piedmont | Commodity contracts | Natural gas (millions of dekatherms) |  |  |
Derivative [Line Items] |  |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 299 | 281 |

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