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Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	1 Months Ended					12 Months Ended
	Jan. 31, 2026	Dec. 31, 2025	Oct. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 7,104				$ 7,104	$ 4,349
Repayments of debt		500	$ 95	$ 650	$ 150
Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 45
Piedmont
Debt Instrument [Line Items]
Current maturities of long-term debt		490				490	205
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt		437				437	534
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt		285				285	983
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 629				$ 629	$ 521
Unsecured Debt | Parent | Convertible Senior Notes Due April 2026
Debt Instrument [Line Items]
Interest rate (as a percent)		4.125%				4.125%
Current maturities of long-term debt		$ 1,725				$ 1,725
Unsecured Debt | Parent | Unsecured Debt Maturing September 2026
Debt Instrument [Line Items]
Interest rate (as a percent)		2.65%				2.65%
Current maturities of long-term debt		$ 1,500				$ 1,500
Unsecured Debt | Parent | Term Loan Facility Maturing September 2026
Debt Instrument [Line Items]
Interest rate (as a percent)		4.704%				4.704%
Current maturities of long-term debt		$ 2,000				$ 2,000
Unsecured Debt | Piedmont | Term Loan Facility Maturing August 2026
Debt Instrument [Line Items]
Interest rate (as a percent)		4.611%				4.611%
Current maturities of long-term debt		$ 450				$ 450
First Mortgage Bonds | Duke Energy Florida | Debt Maturing October 2073, 4.910% Coupon
Debt Instrument [Line Items]
Interest rate (as a percent)		3.981%				3.981%
Current maturities of long-term debt		$ 200				$ 200
First Mortgage Bonds | Duke Energy Florida | Debt Maturing April 2074, 4.910% Coupon
Debt Instrument [Line Items]
Interest rate (as a percent)		3.981%				3.981%
Current maturities of long-term debt		$ 173				$ 173
First Mortgage Bonds | Duke Energy Progress | Debt maturing October 2046
Debt Instrument [Line Items]
Interest rate (as a percent)		3.30%				3.30%
Current maturities of long-term debt		$ 200				$ 200
First Mortgage Bonds | Duke Energy Carolinas | Debt Maturing December 2026, 2.950% Coupon
Debt Instrument [Line Items]
Interest rate (as a percent)		2.95%				2.95%
Current maturities of long-term debt		$ 600				$ 600
Other
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 256				$ 256
First Mortgage Bonds | Duke Energy Florida | Debt Maturing October 2073, 4.910% Coupon
Debt Instrument [Line Items]
Term (in years)						12 months
First Mortgage Bonds | Duke Energy Florida | Debt Maturing April 2074, 4.910% Coupon
Debt Instrument [Line Items]
Term (in years)						12 months

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