Variable Interest Entities (Narrative) (Details) - USD ($)	1 Months Ended			3 Months Ended	12 Months Ended
	Apr. 30, 2024	Mar. 31, 2024	Nov. 30, 2021	Mar. 31, 2024	Dec. 31, 2023	Apr. 25, 2024	Apr. 01, 2024	Feb. 29, 2024
Variable Interest Entities [Line Items]
Debt issuances		$ 3,475,000,000		$ 3,475,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Debt issuances		1,000,000,000		1,000,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Debt issuances		500,000,000		500,000,000
Duke Energy Progress | Storm Recovery Bonds | Subsequent event
Variable Interest Entities [Line Items]
Debt issuances						$ 177,000,000
Duke Energy Progress | 5.404% Storm Recovery Bonds | Storm Recovery Bonds | Subsequent event
Variable Interest Entities [Line Items]
Debt issuances	$ 177,000,000
Duke Energy (Parent)
Variable Interest Entities [Line Items]
Debt issuances		1,250,000,000		1,250,000,000
Duke Energy Indiana
Variable Interest Entities [Line Items]
Debt issuances		300,000,000		300,000,000
Duke Energy Ohio
Variable Interest Entities [Line Items]
Debt issuances		425,000,000		425,000,000
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 | Subsequent event
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		$ 0	663,000,000			$ 682,000,000
Percent of proceeds received as cash		75.00%		75.00%
Percent of proceeds received as subordinated note		25.00%		25.00%
Minimum equity balance required by Cinergy Receivables		$ 3,000,000		$ 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		$ 467,000,000		$ 467,000,000	$ 532,000,000
VIE primary beneficiary | DEFR | Duke Energy Florida | Subsequent event
Variable Interest Entities [Line Items]
Accounts receivable from securitization							$ 459,000,000