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Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | $ 6,685 | $ 5,758 | $ 13,817 | $ 11,908 |
Segment income (loss) | 893 | 751 | 1,711 | 1,704 |
Less: Noncontrolling interests | 27 | 67 | 64 | 118 |
Add: Preferred stock dividend | 14 | 14 | 53 | 53 |
Net Income | 880 | 698 | 1,700 | 1,639 |
Segment assets | 172,383 |  | 172,383 |  | $ 169,587
Impairment of assets and other charges | (9) | 131 | 206 | 131 |
Unregulated operating revenue | (186) | (198) | (383) | (380) |
Incurred costs | 1,447 | 1,410 | 3,077 | 2,812 |
Equity in earnings (losses) of unconsolidated affiliates | 36 | 9 | 61 | (8) |
Income before taxes | (957) | (734) | (1,763) | (1,759) |
Impairment charges |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Impairment of assets and other charges | 131 |  | 211 | 131 |
Operations, maintenance and other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Impairment of assets and other charges | 27 |  | 27 |  |
Depreciation and amortization |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Impairment of assets and other charges | 17 |  | 17 |  |
Regulated Electric Revenues |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Impairment of assets and other charges |  |  | 46 |  |
Duke Energy Carolinas |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 1,781 | 1,610 | 3,669 | 3,326 |
Segment assets | 47,774 |  | 47,774 |  | 47,162
Impairment of assets and other charges | (12) | 75 | (9) | 75 |
Incurred costs | 462 | 435 | 974 | 876 |
Income before taxes | (354) | (226) | (721) | (561) |
Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 545 | 456 | 1,183 | 988 |
Segment income (loss) | 56 | 39 | 133 | 130 |
Segment assets | 11,015 |  | 11,015 |  | 10,774
Impairment of assets and other charges |  | 5 |  | 5 |
Incurred costs | 109 | 111 | 287 | 219 |
Income before taxes | (65) | (50) | (86) | (155) |
Duke Energy Progress |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 1,581 | 1,349 | 3,213 | 2,750 |
Segment assets | 35,336 |  | 35,336 |  | $ 35,383
Impairment of assets and other charges | 4 | 18 | 4 | 18 |
Incurred costs | 360 | 367 | 751 | 724 |
Income before taxes | (254) | (221) | (504) | (450) |
Electric Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 6,126 | 5,328 | 12,121 | 10,601 |
Gas Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 430 | 305 | 1,439 | 1,057 |
Gas Utilities and Infrastructure | Asset Impairment for Regulatory Action |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates |  | (16) |  |  |
Commercial Renewables |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 121 | 119 | 242 | 238 |
Total Reportable Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 6,677 | 5,752 | 13,802 | 11,896 |
Operating Segments | Electric Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 6,135 | 5,335 | 12,137 | 10,616 |
Segment income (loss) | 974 | 935 | 1,697 | 1,755 |
Segment assets | 145,874 |  | 145,874 |  |
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Supreme Court Ruling |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Less: Noncontrolling interests | (2) |  | (20) |  |
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 401 | 343 | 813 | 706 |
Segment income (loss) | 37 | 24 | 78 | 74 |
Segment assets | 7,237 |  | 7,237 |  |
Operating Segments | Gas Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 453 | 327 | 1,485 | 1,102 |
Segment income (loss) | 19 | 17 | 273 | 262 |
Segment assets | 15,420 |  | 15,420 |  |
Equity in earnings (losses) of unconsolidated affiliates |  |  |  | 22 |
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 144 | 113 | 370 | 282 |
Segment income (loss) | 19 | 23 | 57 | 66 |
Segment assets | 3,899 |  | 3,899 |  |
Operating Segments | Commercial Renewables |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 121 | 119 | 242 | 238 |
Segment income (loss) | 30 | 47 | 41 | 74 |
Segment assets | 7,276 |  | 7,276 |  |
Operating Segments | Commercial Renewables | Texas Storm Uri |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Less: Noncontrolling interests |  |  | 12 |  |
Unregulated operating revenue |  |  | (8) |  |
Incurred costs |  |  | 2 |  |
Equity in earnings (losses) of unconsolidated affiliates |  |  | 29 |  |
Income before taxes |  |  | 35 |  |
Operating Segments | Total Reportable Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 6,709 | 5,781 | 13,864 | 11,956 |
Segment income (loss) | 1,023 | 999 | 2,011 | 2,091 |
Segment assets | 168,570 |  | 168,570 |  |
Operating Segments | Total Reportable Segments | Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 545 | 456 | 1,183 | 988 |
Segment income (loss) | 56 | 47 | 135 | 140 |
Segment assets | 11,136 |  | 11,136 |  |
Operating Segments | Nonregulated Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment income (loss) |  |  | 21 |  |
Loss on derivative instruments | 21 |  |  |  |
Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment assets | 3,821 |  | 3,821 |  |
Other | Other | Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment income (loss) |  | (8) | (2) | (10) |
Segment assets | 14 |  | 14 |  |
Corporate And Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 30 | 27 | 60 | 53 |
Segment income (loss) | (130) | (248) | (300) | (387) |
Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | (54) | (50) | (107) | (101) |
Segment assets | (8) |  | (8) |  |
Eliminations | Duke Energy Ohio |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment assets | (135) |  | (135) |  |
Eliminations | Electric Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 9 | 7 | 16 | 15 |
Eliminations | Gas Utilities and Infrastructure |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 23 | 22 | 46 | 45 |
Eliminations | Total Reportable Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 32 | 29 | 62 | 60 |
Eliminations | Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | 22 | 21 | 45 | 41 |
Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating Revenues | $ 8 | $ 6 | $ 15 | $ 12 |

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