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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, 2025 USD ($) GWh Mcf	Jun. 30, 2024 GWh Mcf	Dec. 31, 2024 USD ($)
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 6,502		$ 6,027
Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	4,679	12,229
Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	780	779
Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 2,975		2,825
Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	3,527		3,202
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,425		1,150
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	288	276
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	1,425		1,150
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 1,625		1,775
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	250	246
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	1,625		1,775
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 500		1,125
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	250	246
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	500		1,125
Duke Energy Florida | Interest Rate Contracts
Derivative [Line Items]
Notional amount	1,125		650
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	1,125		650
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 450		250
Duke Energy Indiana | Commodity contracts | Electricity (GWh)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	4,161	10,942
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	26	32
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	450		250
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	518	1,287
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	216	225

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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
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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