Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 4,609	$ 3,878
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 659
Duke Energy (Parent) | Debt Maturing October 2023, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate	3.95%
Current maturities of long-term debt	$ 400
Duke Energy (Parent) | Debt Maturing October 2023, 5.645% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate	5.645%
Current maturities of long-term debt	$ 1,000
Duke Energy (Parent) | Debt Maturing March 2024, 5.385% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate	3.75%
Current maturities of long-term debt	$ 1,000
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 475	475
Duke Energy Ohio | Debt Maturing October 2023, 4.879% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate	5.546%
Current maturities of long-term debt	$ 150
Duke Energy Ohio | Debt Maturing September 2023, 3.800% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate	3.80%
Current maturities of long-term debt	$ 300
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	18	1,018
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 370	369
Duke Energy Progress | Debt Maturing September 2023, 3.375% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate	3.375%
Current maturities of long-term debt	$ 300
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 1,201	$ 328
Duke Energy Florida | Debt Maturing April 2024, 5.921% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate	5.921%
Current maturities of long-term debt	$ 800