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Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Total Derivative Assets $ 382 $ 434
Total Derivative Liabilities 244 319
Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 116 267
Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 266 167
Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 131 145
Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 113 174
Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 56 109
Total Derivative Liabilities 210 242
Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 170 320
Total Derivative Liabilities 7 3
Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 27 74
Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 156 5
Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 156  
Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 25 108
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 20 52
Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 27  
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities   39
Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 28 49
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 28 60
Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 104 108
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 106 134
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 63 110
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 62  
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities   2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 7 1
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   50
Not Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities   35
Not Designated as Hedging Instruments | Foreign Currency Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   5
Duke Energy Carolinas    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 101 94
Total Derivative Liabilities 88 88
Duke Energy Carolinas | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 43 39
Duke Energy Carolinas | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 58 55
Duke Energy Carolinas | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 56 57
Duke Energy Carolinas | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 32 31
Duke Energy Carolinas | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 21 49
Total Derivative Liabilities 85 88
Duke Energy Carolinas | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 80 45
Total Derivative Liabilities 3  
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 9 20
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 12 29
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 53 57
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 32 31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 34 19
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 46  
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 3  
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   26
Progress Energy    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 67 127
Total Derivative Liabilities 48 58
Progress Energy | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 36 72
Progress Energy | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 31 55
Progress Energy | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 21 34
Progress Energy | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 27 24
Progress Energy | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 23 49
Total Derivative Liabilities 46 56
Progress Energy | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 44 78
Total Derivative Liabilities 2 2
Progress Energy | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities   0
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 7 17
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 16 32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 25 32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 21 24
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 29 55
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 15  
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities (4) 2
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 6  
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   23
Duke Energy Progress    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 52 109
Total Derivative Liabilities 47 57
Duke Energy Progress | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 36 61
Duke Energy Progress | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 16 48
Duke Energy Progress | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 20 33
Duke Energy Progress | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 27 24
Duke Energy Progress | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 23 49
Total Derivative Liabilities 46 56
Duke Energy Progress | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 29 60
Total Derivative Liabilities 1 1
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 7 17
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 16 32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 25 32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 21 24
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 29 44
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities (5) 1
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 6  
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   16
Duke Energy Florida    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 15 18
Total Derivative Liabilities 1 1
Duke Energy Florida | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 1 11
Duke Energy Florida | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 14 7
Duke Energy Florida | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 1 1
Duke Energy Florida | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 15 18
Total Derivative Liabilities 1 1
Duke Energy Florida | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities   0
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 1 11
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 14  
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 1 1
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   7
Duke Energy Ohio    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Total Derivative Liabilities 1 1
Duke Energy Ohio | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Duke Energy Ohio | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 1 1
Duke Energy Ohio | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Duke Energy Ohio | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 1 1
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 1 1
Duke Energy Indiana    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 12 44
Total Derivative Liabilities 9 3
Duke Energy Indiana | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 11 44
Duke Energy Indiana | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 1  
Duke Energy Indiana | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 9 3
Duke Energy Indiana | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 11 8
Total Derivative Liabilities 7 3
Duke Energy Indiana | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 1 36
Total Derivative Liabilities 2  
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 11 8
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 7 3
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   36
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets 1  
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 2  
Piedmont    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Total Derivative Liabilities 72 94
Piedmont | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Piedmont | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 19 16
Piedmont | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 53 78
Piedmont | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Total Derivative Liabilities 72 94
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets    
Derivatives, Fair Value [Line Items]    
Total Derivative Assets   1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities 19 16
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Total Derivative Liabilities $ 53 $ 78