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Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability $ 396 $ 434
Regulatory assets 16,313 16,959
Regulatory liabilities 16,953 15,942
Duke Energy Carolinas    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 24 24
Regulatory assets 5,232 4,884
Regulatory liabilities 8,178 7,210
Progress Energy    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 247 254
Regulatory assets 7,403 8,265
Regulatory liabilities 5,951 5,780
Duke Energy Progress    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 139 141
Regulatory assets 5,195 5,181
Regulatory liabilities 5,081 4,918
Duke Energy Florida    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 88 92
Regulatory assets 2,208 3,086
Regulatory liabilities 870 862
Duke Energy Ohio    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 88 89
Regulatory assets 772 793
Regulatory liabilities 527 499
Duke Energy Indiana    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 75 82
Regulatory assets 1,225 1,153
Regulatory liabilities 1,460 1,587
Piedmont    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 7 7
Regulatory assets 456 528
Regulatory liabilities 822 847
Pension Plan    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 1,339 907
Net asset recognized (1,339) (907)
Regulatory assets 1,966 2,168
Accumulated other comprehensive income (loss)    
Deferred income tax benefit (21) (24)
Net actuarial gain 98 115
Net amounts recognized in accumulated other comprehensive income 77 91
Pension Plan | Duke Energy Carolinas    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 433 337
Net asset recognized (433) (337)
Regulatory assets 524 570
Pension Plan | Progress Energy    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 678 501
Noncurrent pension liability 1  
Net asset recognized (677) (501)
Regulatory assets 627 711
Accumulated other comprehensive income (loss)    
Deferred income tax benefit (1) (1)
Net actuarial gain 3 4
Net amounts recognized in accumulated other comprehensive income 2 3
Pension Plan | Duke Energy Progress    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 312 231
Noncurrent pension liability 1  
Net asset recognized (311) (231)
Regulatory assets 314 354
Pension Plan | Duke Energy Florida    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 358 263
Net asset recognized (358) (263)
Regulatory assets 313 356
Pension Plan | Duke Energy Ohio    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 89 74
Noncurrent pension liability 73 74
Net asset recognized (16)  
Regulatory assets 92 100
Pension Plan | Duke Energy Indiana    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 120 101
Noncurrent pension liability 72 74
Net asset recognized (48) (27)
Regulatory assets 176 182
Pension Plan | Piedmont    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 53 33
Net asset recognized (53) (33)
Regulatory assets 104 113
Other Post-Retirement Benefit Plans    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Current pension liability 8 8
Noncurrent pension liability 142 165
Net asset recognized 150 173
Regulatory assets 70 81
Regulatory liabilities 124 154
Accumulated other comprehensive income (loss)    
Deferred income tax expense 3 3
Net actuarial gain (13) (12)
Net amounts recognized in accumulated other comprehensive income (10) (9)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 55 44
Net asset recognized (55) (44)
Regulatory assets   17
Regulatory liabilities 18 35
Other Post-Retirement Benefit Plans | Progress Energy    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Current pension liability 5 5
Noncurrent pension liability 139 142
Net asset recognized 144 147
Regulatory assets 69 62
Regulatory liabilities 11 12
Accumulated other comprehensive income (loss)    
Net actuarial gain (1) (1)
Net amounts recognized in accumulated other comprehensive income (1) (1)
Other Post-Retirement Benefit Plans | Duke Energy Progress    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Current pension liability 3 3
Noncurrent pension liability 83 84
Net asset recognized 86 87
Regulatory assets 48 46
Regulatory liabilities 11 12
Other Post-Retirement Benefit Plans | Duke Energy Florida    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Current pension liability 2 2
Noncurrent pension liability 56 58
Net asset recognized 58 60
Regulatory assets 21 16
Other Post-Retirement Benefit Plans | Duke Energy Ohio    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 1 1
Current pension liability 1 1
Noncurrent pension liability 9 11
Net asset recognized 9 11
Regulatory assets 1 1
Regulatory liabilities 13 14
Other Post-Retirement Benefit Plans | Duke Energy Indiana    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Noncurrent pension liability 19 20
Net asset recognized 19 20
Regulatory assets 17 20
Regulatory liabilities 53 62
Other Post-Retirement Benefit Plans | Piedmont    
Amounts Recognized in Consolidated Balance Sheets [Abstract]    
Prefunded pension 17 14
Net asset recognized (17) (14)
Regulatory assets   $ 1
Regulatory liabilities $ 1