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Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) GWh Mcf | Dec. 31, 2023 USD ($) GWh Mcf
Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 4,952 | $ 5,027
Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 4,981 | 13,608
Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 813 | 846
Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 2,550 | $ 2,300
Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 2,402 | 2,727
Duke Energy Carolinas | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 850 | $ 1,050
Duke Energy Carolinas | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 0 | 0
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 266 | 279
Duke Energy Carolinas | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 850 | 1,050
Progress Energy | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 1,325 | $ 1,250
Progress Energy | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 0 | 0
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 259 | 274
Progress Energy | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Progress Energy | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 1,325 | 1,250
Duke Energy Progress | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 875 | $ 925
Duke Energy Progress | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 0 | 0
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 259 | 274
Duke Energy Progress | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 875 | 925
Duke Energy Florida | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 450 | 325
Duke Energy Florida | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 0 | 0
Duke Energy Florida | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 450 | 325
Duke Energy Indiana | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 200 | $ 400
Duke Energy Indiana | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 4,312 | 11,992
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 35 | 30
Duke Energy Indiana | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | 200 | 400
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 | 669 | 1,616
Duke Energy Ohio | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 0 | 0
Duke Energy Ohio | Designated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts |  |
Derivative [Line Items] |  |
Notional amount | $ 27 | $ 27
Piedmont | Commodity contracts | Electricity (GWh) |  |
Derivative [Line Items] |  |
Notional amount, energy measure (in gigawatt-hours) | GWh | 0 | 0
Piedmont | Commodity contracts | Natural gas (millions of dekatherms) |  |
Derivative [Line Items] |  |
Notional amount, volume (in millions of dekatherms) | Mcf | 253 | 263

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