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Variable Interest Entities (Narrative) (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2025 | Oct. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Jan. 31, 2025 | Apr. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2025 | Apr. 01, 2024 | Feb. 29, 2024
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 500,000,000 | $ 95,000,000 | $ 650,000,000 | $ 150,000,000 |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 7,005,000,000 |  |  |  |  |  |  |  | $ 7,005,000,000 | $ 7,740,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 4,569,000,000 |  |  |  |  |  |  |  | 4,569,000,000 | 4,496,000,000 |  |  |  |
Accounts payable | 5,223,000,000 |  |  |  |  |  |  |  | 5,223,000,000 | 5,436,000,000 |  |  |  |
Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 2,243,000,000 |  |  |  |  |  |  |  | 2,243,000,000 | 1,000,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 1,530,000,000 |  |  |  |  |  |  |  | 1,530,000,000 | 1,536,000,000 |  |  |  |
Accounts payable | 1,670,000,000 |  |  |  |  |  |  |  | 1,670,000,000 | 1,809,000,000 |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 2,561,000,000 |  |  |  |  |  |  |  | 2,561,000,000 | 677,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 1,363,000,000 |  |  |  |  |  |  |  | 1,363,000,000 | 1,341,000,000 |  |  |  |
Accounts payable | 886,000,000 |  |  |  |  |  |  |  | 886,000,000 | 749,000,000 |  |  |  |
Parent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 1,750,000,000 |  |  |  |  |  |  |  | 1,750,000,000 | 4,565,000,000 |  |  |  |
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 501,000,000 |  |  |  |  |  |  |  | 501,000,000 | 650,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 187,000,000 |  |  |  |  |  |  |  | 187,000,000 | 183,000,000 |  |  |  |
Accounts payable | 333,000,000 |  |  |  |  |  |  |  | 333,000,000 | 313,000,000 |  |  |  |
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 1,100,000,000 |  |  |  |  |  |  |  | 1,100,000,000 | 173,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 847,000,000 |  |  |  |  |  |  |  | 847,000,000 | 745,000,000 |  |  |  |
Accounts payable | 792,000,000 |  |  |  |  |  |  |  | 792,000,000 | 1,418,000,000 |  |  |  |
Duke Energy Indiana |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued | 300,000,000 |  |  |  |  |  |  |  | 300,000,000 | 300,000,000 |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 531,000,000 |  |  |  |  |  |  |  | 531,000,000 | 586,000,000 |  |  |  |
Accounts payable | 360,000,000 |  |  |  |  |  |  |  | 360,000,000 | 257,000,000 |  |  |  |
Consolidated VIEs |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial support |  |  |  |  |  |  |  |  | 0 | 0 | $ 0 |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 669,000,000 |  |  |  |  |  |  |  | 669,000,000 | 494,000,000 |  |  |  |
Accounts payable | 296,000,000 |  |  |  |  |  |  |  | 296,000,000 | 214,000,000 |  |  |  |
Consolidated VIEs | Duke Energy Carolinas | DERF Accounts Receivable Securitization financing | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |
Consolidated VIEs | Duke Energy Progress | DERF Accounts Receivable Securitization financing | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |  |
Consolidated VIEs | Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory (includes $669 at 2025 and $494 at 2024 related to VIEs) | 669,000,000 |  |  |  |  |  |  |  | 669,000,000 | 494,000,000 |  |  |  |
Accounts payable | $ 289,000,000 |  |  |  |  |  |  |  | $ 289,000,000 | 208,000,000 |  |  |  |
Consolidated VIEs | Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  | $ 325,000,000 |  |  |  |  |  |  |
Consolidated VIEs | Duke Energy Florida | DERF Accounts Receivable Securitization financing | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |
Consolidated VIEs | Cinergy Receivables [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  | $ 350,000,000 |  |  |  |  |  |
Restricted receivables |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 682,000,000
Proceeds received as cash (as a percent) | 75.00% |  |  |  |  |  |  |  | 75.00% |  |  |  |  |
Proceeds received as subordinated note (as a percent) | 25.00% |  |  |  |  |  |  |  | 25.00% |  |  |  |  |
Consolidated VIEs | Cinergy Receivables [Member] | Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables |  |  |  |  |  |  |  |  |  |  |  |  |  | 366,000,000
Consolidated VIEs | Cinergy Receivables [Member] | Duke Energy Indiana |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 316,000,000
Consolidated VIEs | DECNCSF | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables | $ 1,000,000 |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |
Consolidated VIEs | DEPNCSF | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables | 4,000,000 |  |  |  |  |  |  |  | 4,000,000 |  |  |  |  |
Consolidated VIEs | Defr [Member] | Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables |  |  |  |  |  |  |  |  |  |  |  |  | $ 459,000,000 |
Consolidated VIEs | DERF | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables |  |  |  |  |  | $ 1,081,000,000 |  |  |  | $ 1,054,000,000 |  |  |  |
Consolidated VIEs | DERF | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables |  |  |  |  | $ 943,000,000 |  |  |  |  |  |  |  |  |
Consolidated VIEs | DEPSCSF | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables | 2,000,000 |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |
Proceeds from issuance of senior secured bonds |  |  |  |  |  |  | $ 177,000,000 |  |  |  |  |  |  |
Consolidated VIEs | DECNCSFII | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables | 3,000,000 |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |
Consolidated VIEs | DECNCSFII | Duke Energy Carolinas | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued |  |  | 582,000,000 |  |  |  |  |  |  |  |  |  |  |
Consolidated VIEs | DEPNCSFII | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted receivables | $ 3,000,000 |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |  |
Consolidated VIEs | DEPNCSFII | Duke Energy Progress | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued |  |  | $ 461,000,000 |  |  |  |  |  |  |  |  |  |  |
Consolidated VIEs | DECSCSF | Duke Energy Carolinas | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  | $ 561,000,000 |  |
Non-consolidated VIEs | Cinergy Receivables [Member] | Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate (as a percent) |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |

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