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Public Utilities, Combined Cycle Plants, in Megawatts

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Public Utilities, Operating License Extension, Period

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Public Utilities, Proposed Rate, Period

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Public Utilities, Retail Revenue Requirement

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Public Utilities, Settlement Rate, Amount

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Public Utilities, Settlement Rate, Period

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

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

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Percentage of public utility's approved return on equity.

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

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

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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								24 Months Ended	36 Months Ended
	Feb. 01, 2026 USD ($)	Nov. 21, 2025 USD ($) Rate MW	Nov. 20, 2025	Jul. 14, 2025	Dec. 15, 2023	Aug. 18, 2023 USD ($)	Jan. 19, 2023	Aug. 31, 2023 USD ($)	Apr. 30, 2023	Oct. 31, 2022	Nov. 19, 2027 USD ($)	Dec. 14, 2026 USD ($)	Nov. 19, 2026 USD ($)	Aug. 17, 2026 USD ($)	Dec. 14, 2025 USD ($)	Aug. 17, 2025 USD ($)	Dec. 14, 2024 USD ($)	Aug. 17, 2024 USD ($)	Nov. 19, 2027 USD ($)	Dec. 14, 2026 USD ($)	Aug. 17, 2026 USD ($)	Oct. 30, 2025 USD ($) MW	Mar. 31, 2024 MW
NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW		850																					850
Public Utilities, Retail Revenue Requirement		$ 154
Increase (Decrease) in Retail Rate \| Rate		2.30%
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															$ 174		$ 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 \| If approved
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount												$ 158								$ 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]
Approved rate increase (decrease), amount	$ 19
Approved return on equity percentage (as a percent)	9.99%
Approved equity capital structure, percentage (as a percent)	53.00%
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
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW																						1,365
Anderson County Natural Gas CC Generating Facility \| PSCSC \| Duke Energy Carolinas
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
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW																						100
Anderson County Natural Gas CC Generating Facility \| PSCSC \| Central Electric Power Cooperative
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW																						95
2022 North Carolina Rate Case \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)									3 years
Settlement rate, amount						$ 12,200
Settlement rate, period (in years)						3 years				3 years
Approved rate increase (decrease), amount																$ 126		$ 233
Approved return on equity percentage (as a percent)						9.80%
Approved equity capital structure, percentage (as a percent)						53.00%
2022 North Carolina Rate Case \| NCUC \| Duke Energy Progress \| If approved
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount														$ 135							$ 494
2025 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)			10.95%
2025 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas \| Equity
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)			53.00%
2025 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas \| If approved
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount											$ 275		$ 727						$ 1,000
Requested rate increase (decrease) (as a percent)																			15.00%
2025 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas \| If approved \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount											257		695						$ 952
2025 North Carolina Rate Case \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)			10.95%
2025 North Carolina Rate Case \| NCUC \| Duke Energy Progress \| Equity
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)			53.00%
2025 North Carolina Rate Case \| NCUC \| Duke Energy Progress \| If approved
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount											$ 200		$ 529						$ 729
Requested rate increase (decrease) (as a percent)																			15.10%