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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 |

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