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Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) GWh Mcf	Dec. 31, 2023 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 6,027	$ 5,027
Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	19,823	13,608
Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	791	846
Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 2,825	$ 2,300
Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	3,202	2,727
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,150	$ 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	264	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	1,150	1,050
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,775	$ 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	244	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	1,775	1,250
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,125	$ 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	244	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	1,125	925
Duke Energy Florida | Interest Rate Contracts
Derivative [Line Items]
Notional amount	650	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	650	325
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 400
Duke Energy Indiana | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	17,349	11,992
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	30	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	250	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	2,474	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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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
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