Public Utilities, Combined Cycle Plants, in Megawatts

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- Definition

Public Utilities, Expected Capital Expenditures

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- Definition

Public Utilities, Operating License Extension, Period

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- Definition

Public Utilities, Proposed Rate, Period

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- Definition

Public Utilities, Settlement Rate, Amount

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- Definition

Public Utilities, Settlement Rate, Period

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- Definition

Percentage of public utility's approved equity to capital, including debt and equity.

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- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

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- Definition

Percentage of public utility's approved return on equity.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Percentage of public utility's requested equity to capital, including debt and equity.

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- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

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- Definition

Percentage of public utility's requested rate increase (decrease) with regulatory agency.

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- Definition

Percentage of public utility's requested return on equity.

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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) $ in Millions						1 Months Ended	12 Months Ended			36 Months Ended
	Jul. 14, 2025	Jul. 01, 2025 USD ($)	Dec. 15, 2023	Jan. 19, 2023	Jun. 07, 2021	Aug. 31, 2023 USD ($)	Dec. 14, 2026 USD ($)	Dec. 14, 2025 USD ($)	Dec. 14, 2024 USD ($)	Dec. 14, 2026 USD ($)	Oct. 30, 2025 USD ($) MW
Oconee Nuclear Station Subsequent License Renewal \| NRC \| Duke Energy Carolinas \| Oconee Nuclear Station
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
2023 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)				3 years
Settlement rate, amount						$ 19,500
Settlement rate, period (in years)						3 years
Approved rate increase (decrease), amount									$ 436
Approved return on equity percentage (as a percent)			10.10%
Approved equity capital structure, percentage (as a percent)			53.00%
2023 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas \| Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount							$ 158	$ 174		$ 768
2023 North Carolina Rate Case, Retail Allocated \| NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Settlement rate, amount						$ 4,600
2025 South Carolina Rate Case \| PSCSC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 151
Requested return on equity (as a percent)		10.85%
Requested equity capital structure, percentage (as a percent)		53.00%
Requested rate increase (decrease) (as a percent)		7.70%
Bad Creek Pumped Storage Hydroelectric Station License Renewal \| Federal Energy Regulatory Commission (FERC) \| Duke Energy Carolinas \| Bad Creek Pumped Storage Hydroelectric Station
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)	50 years
Anderson County Natural Gas CC Generating Facility \| PSCSC \| Duke Energy Carolinas and Third Parties \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW											1,365
Anderson County Natural Gas CC Generating Facility \| PSCSC \| Duke Energy Carolinas \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW											1,170
Expected total project cost											$ 3,200
Anderson County Natural Gas CC Generating Facility \| PSCSC \| North Carolina Electric Membership Corporation \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW											100
Anderson County Natural Gas CC Generating Facility \| PSCSC \| Central Electric Power Cooperative \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW											95