v3.26.1
Debt and Credit Facilities (Summary of Debt Issuances) (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Debt Instrument [Line Items]  
Debt issuances $ 2,275
Unsecured Debt Issued March 2026 Due March 2029 | Unsecured Debt  
Debt Instrument [Line Items]  
Interest rate 3.00%
Debt issuances $ 1,500
First Mortgage Bonds Issued March 2026 Due March 2036 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Interest rate 4.95%
Debt issuances $ 500
First Mortgage Bonds Issued March 2026 Due April 2076 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Interest rate 3.30%
Debt issuances $ 275
Duke Energy (Parent)  
Debt Instrument [Line Items]  
Debt issuances 1,500
Duke Energy (Parent) | Unsecured Debt Issued March 2026 Due March 2029 | Unsecured Debt  
Debt Instrument [Line Items]  
Debt issuances 1,500
Duke Energy (Parent) | First Mortgage Bonds Issued March 2026 Due March 2036 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy (Parent) | First Mortgage Bonds Issued March 2026 Due April 2076 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy Indiana  
Debt Instrument [Line Items]  
Debt issuances 500
Duke Energy Indiana | Unsecured Debt Issued March 2026 Due March 2029 | Unsecured Debt  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy Indiana | First Mortgage Bonds Issued March 2026 Due March 2036 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances 500
Duke Energy Indiana | First Mortgage Bonds Issued March 2026 Due April 2076 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy Florida  
Debt Instrument [Line Items]  
Debt issuances 275
Duke Energy Florida | Unsecured Debt Issued March 2026 Due March 2029 | Unsecured Debt  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy Florida | First Mortgage Bonds Issued March 2026 Due March 2036 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances 0
Duke Energy Florida | First Mortgage Bonds Issued March 2026 Due April 2076 | First Mortgage Bonds  
Debt Instrument [Line Items]  
Debt issuances $ 275