Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2023	Oct. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 4,034	$ 3,878
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt			684
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 175	475
Duke Energy Ohio | Debt Maturing October 2023, 5.813% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			5.813%
Current maturities of long-term debt			$ 150
Duke Energy (Parent) | Debt Maturing October 2023, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			3.95%
Current maturities of long-term debt			$ 400
Duke Energy (Parent) | Debt Maturing April 2024, 3.75% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			3.75%
Current maturities of long-term debt			$ 1,000
Duke Energy (Parent) | Debt Maturing March 2024, 6.048% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			6.048%
Current maturities of long-term debt			$ 1,000
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt			$ 1,194	$ 328
Duke Energy Florida | Debt Maturing April 2024, 6.196% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)			6.196%
Current maturities of long-term debt			$ 800
Duke Energy Kentucky | Unsecured Debt | Subsequent event
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 75	$ 50
Facility term (in years)	2 years