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Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 2,340	$ 2,800
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 247
Duke Energy (Parent) | Debt Maturing April 2025, 3.364% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.364%
Current maturities of long-term debt	$ 420
Duke Energy (Parent) | Debt Maturing April 2025, 3.950% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.95%
Current maturities of long-term debt	$ 250
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 150	0
Duke Energy Ohio | Debt Maturing June 2025, 6.900% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.90%
Current maturities of long-term debt	$ 150
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 520	19
Duke Energy Carolinas | 6.177% Notes Due January 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.177%
Current maturities of long-term debt	$ 305
Duke Energy Carolinas | 5.973% Notes Due January 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	5.973%
Current maturities of long-term debt	$ 195
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 479	72
Duke Energy Progress | 6.199% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.199%
Current maturities of long-term debt	$ 240
Duke Energy Progress | 6.177% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.177%
Current maturities of long-term debt	$ 160
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 435	$ 589
Duke Energy Florida | 4.998% Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	4.998%
Current maturities of long-term debt	$ 200
Duke Energy Florida | 4.970% Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	4.97%
Current maturities of long-term debt	$ 173
Duke Energy Florida | 4.998% Notes Due October 2073 And 4.970% Notes Due April 2074 | First Mortgage Bonds
Debt Instrument [Line Items]
Facility term (in years)	12 months

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