Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility	Mar. 31, 2024 USD ($)
Line of Credit Facility [Line Items]
Facility size	$ 9,000,000,000
Commercial paper	(3,759,000,000)
Outstanding letters of credit	(38,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	5,122,000,000
Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,400,000,000
Commercial paper	(355,000,000)
Outstanding letters of credit	(4,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	1,041,000,000
Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	1,575,000,000
Commercial paper	(904,000,000)
Outstanding letters of credit	(1,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	670,000,000
Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(66,000,000)
Outstanding letters of credit	(7,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	877,000,000
Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	1,050,000,000
Commercial paper	(331,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	719,000,000
Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	950,000,000
Commercial paper	(286,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	583,000,000
Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(508,000,000)
Outstanding letters of credit	0
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	292,000,000
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants
Line of Credit Facility [Line Items]
Commercial paper	(625,000,000)
Duke Energy (Parent) | Duke Energy (Parent)
Line of Credit Facility [Line Items]
Facility size	2,275,000,000
Commercial paper	(1,309,000,000)
Outstanding letters of credit	(26,000,000)
Tax-exempt bonds	0
Available capacity under the Master Credit Facility	$ 940,000,000