Variable Interest Entities (Fair Value Assumptions) (Details) - Non-consolidated VIEs - CRC	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Duke Energy Ohio
Variable Interest Entity [Line Items]
Anticipated credit loss ratio (as a percent)	0.60%	0.50%
Discount rate (as a percent)	6.10%	2.70%
Receivable turnover rate (as a percent)	13.90%	13.50%
Duke Energy Indiana
Variable Interest Entity [Line Items]
Anticipated credit loss ratio (as a percent)	0.40%	0.30%
Discount rate (as a percent)	6.10%	2.70%
Receivable turnover rate (as a percent)	12.00%	11.30%