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Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 3,597	$ 2,800
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 204
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 (Parent) | Debt Maturing September 2025, 0.900% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	0.90%
Current maturities of long-term debt	$ 650
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
Piedmont
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 150	40
Piedmont | Debt Maturing September 2025, 3.600% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.60%
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)	6.036%
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)	6.097%
Current maturities of long-term debt	$ 195
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 983	72
Duke Energy Progress | Debt Maturing August 2025, 3.500% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	3.25%
Current maturities of long-term debt	$ 500
Duke Energy Progress | 6.096% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.096%
Current maturities of long-term debt	$ 240
Duke Energy Progress | 6.096% Notes Due April 2025 | Secured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)	6.096%
Current maturities of long-term debt	$ 160
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 436	$ 589
Duke Energy Florida | 4.998% Notes Due October 2073 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate (as a percent)	5.005%
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)	5.008%
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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