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Variable Interest Entities (Narrative) (Details) - USD ($)	1 Months Ended			6 Months Ended	12 Months Ended
	Apr. 30, 2024	Mar. 31, 2024	Nov. 30, 2021	Jun. 30, 2024	Dec. 31, 2023	Apr. 25, 2024	Apr. 01, 2024	Feb. 29, 2024
Variable Interest Entities [Line Items]
Debt issuances				$ 6,365,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Debt issuances				1,000,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Debt issuances				677,000,000
Duke Energy Progress | Storm Recovery Bonds
Variable Interest Entities [Line Items]
Debt issuances						$ 177,000,000
Duke Energy Progress | 5.404% Storm Recovery Bonds | Storm Recovery Bonds
Variable Interest Entities [Line Items]
Debt issuances	$ 177,000,000
Duke Energy (Parent)
Variable Interest Entities [Line Items]
Debt issuances				3,565,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Debt issuances				173,000,000
Duke Energy Indiana
Variable Interest Entities [Line Items]
Debt issuances				300,000,000
Duke Energy Ohio
Variable Interest Entities [Line Items]
Debt issuances				650,000,000
VIE primary beneficiary
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount				0	$ 0
VIE primary beneficiary | Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt
Variable Interest Entities [Line Items]
Repayments of debt	$ 325,000,000
VIE primary beneficiary | CRC
Variable Interest Entities [Line Items]
Repayments of debt		$ 350,000,000
Accounts receivable from securitization				$ 0	663,000,000			$ 682,000,000
Percent of proceeds received as cash				75.00%
Percent of proceeds received as subordinated note				25.00%
Minimum equity balance required by Cinergy Receivables				$ 3,000,000
VIE primary beneficiary | CRC | Duke Energy Indiana
Variable Interest Entities [Line Items]
Accounts receivable from securitization								316,000,000
VIE primary beneficiary | CRC | Duke Energy Ohio
Variable Interest Entities [Line Items]
Accounts receivable from securitization								$ 366,000,000
VIE primary beneficiary | DECNCSF | Duke Energy Carolinas
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds			$ 237,000,000
VIE primary beneficiary | DEPNCSF | Duke Energy Progress
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds			$ 770,000,000
VIE primary beneficiary | DEFR | Duke Energy Florida
Variable Interest Entities [Line Items]
Accounts receivable from securitization				$ 0	$ 532,000,000		$ 459,000,000

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