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Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) GWh Mcf | Dec. 31, 2022 USD ($) GWh Mcf
Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 5,027 | $ 2,877
Interest Rate Contracts | Designated contracts | Cash flow hedges |  |
Derivative [Line Items] |  |
Pay Notional | 2,300 | 500
Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 2,727 | $ 2,377
Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure, electricity (in GWh) | GWh | 13,608 | 14,086
Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 846 | 909
Duke Energy Carolinas | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 1,050 | $ 1,250
Duke Energy Carolinas | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 1,050 | $ 1,250
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 279 | 307
Progress Energy | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 1,250 | $ 800
Progress Energy | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 1,250 | $ 800
Progress Energy | Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 274 | 292
Duke Energy Progress | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 925 | $ 500
Duke Energy Progress | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 925 | $ 500
Duke Energy Progress | Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 274 | 292
Duke Energy Florida | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 325 | $ 300
Duke Energy Florida | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | 325 | 300
Duke Energy Ohio | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | 27 | 27
Duke Energy Ohio | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 27 | $ 27
Duke Energy Ohio | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure, electricity (in GWh) | GWh | 1,616 | 1,820
Duke Energy Indiana | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 400 | $ 300
Duke Energy Indiana | Interest Rate Contracts | Undesignated contracts |  |
Derivative [Line Items] |  |
Pay Notional | $ 400 | $ 300
Duke Energy Indiana | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure, electricity (in GWh) | GWh | 11,992 | 12,266
Duke Energy Indiana | Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 30 | 11
Piedmont | Commodity contracts | Natural gas (millions of Dth) |  |
Derivative [Line Items] |  |
Notional amount, volume of natural gas (in millions of Dth) | Mcf | 263 | 299

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