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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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