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- Definition

Public Utilities, Actual Storm Costs

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Public Utilities, Approved Plan, Restoration Cost Reduction

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Public Utilities, Approved Plan, Restoration Cost Reduction Period

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Public Utilities, Basis Points, Increase, Percentage

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Public Utilities, Estimated Cost of Generation Facilities to be Built

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- Definition

Public Utilities, Investment in Transmission and Distribution

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Public Utilities, Number Of Impacted Customers

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Public Utilities, Number Of Outages

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Public Utilities, Number of Solar Plants Petition for Approval

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Public Utilities, Solar Generation Capacity Plants, in Megawatts

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- Definition

Utilities, Future Investment in Infrastructure

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- Definition

Carrying amount as of the balance sheet date of the portion of the reserved funds established by a utility from customer payments to cover the repair costs of damages from major storms, which repairs are expected to be incurred beyond one year or the normal operating cycle, if longer.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as noncurrent.

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Carrying amount as of the balance sheet date of capitalized storm costs of a regulated entity that are expected to be recoverable through rate adjustments after one year or beyond the normal operating cycle, if longer.

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Cash received for the settlement of litigation during the current period.

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

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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 interim rate increase (decrease) allowed while waiting final decision of regulatory agency.

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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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Regulatory Matters (Duke Energy Florida Narrative) (Details)								1 Months Ended	12 Months Ended
	Oct. 16, 2023 USD ($)	Jan. 23, 2023 USD ($)	Oct. 17, 2022 USD ($)	Oct. 04, 2022 USD ($)	Jun. 15, 2022 USD ($)	Jan. 14, 2021 USD ($)	Jul. 01, 2020 USD ($) plant MW	Jan. 31, 2024	Dec. 31, 2027 USD ($)	Dec. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 29, 2023 USD ($)	Aug. 30, 2023 outage	Dec. 31, 2022 USD ($)	Sep. 28, 2022 outage	Sep. 27, 2022 USD ($)	Apr. 11, 2022 USD ($)	May 04, 2021 USD ($)
Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Actual storm costs														$ 431,000,000
Duke Energy Florida \| Solar Plant
Public Utilities, General Disclosures [Line Items]
Estimated cost of generation facilities to be built							$ 1,000,000,000
Duke Energy Florida \| FPSC
Public Utilities, General Disclosures [Line Items]
Number of solar plants petition for approval \| plant							10
Solar generation capacity plants (in MW) \| MW							750
Duke Energy Florida \| FPSC \| Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Number of outages \| outage																	1,100,000
Deferred storm coats													$ 353,000,000
Storm reserves																$ 132,000,000		$ 107,000,000
Expected recovery payments to be received		$ 442,000,000
Duke Energy Florida \| 2021 Settlement \| FPSC
Public Utilities, General Disclosures [Line Items]
Approved capital structure (as a percent)						53.00%
Approved debt structure (as a percent)						47.00%
Public utilities, basis points, increase						0.25%
Contract asset, noncurrent					$ 154,000,000	$ 173,000,000							141,000,000							$ 173,000,000
Proceeds from legal settlements					$ 180,000,000
Requested rate increase (decrease)			$ 56,000,000
Future investments in new cost						$ 1,000,000,000
Duke Energy Florida \| 2021 Settlement \| FPSC \| Forecast
Public Utilities, General Disclosures [Line Items]
Contract asset, noncurrent												$ 32,000,000
Duke Energy Florida \| 2021 Settlement \| FPSC \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Public utilities, basis points, increase						0.50%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Minimum
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						8.85%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Minimum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						9.85%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Maximum
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						10.85%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Maximum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						10.10%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Weighted Average
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						9.85%
Duke Energy Florida \| 2021 Settlement \| FPSC \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission										$ 79,000,000	$ 49,000,000	$ 67,000,000
Duke Energy Florida \| Storm Protection Plan \| FPSC
Public Utilities, General Disclosures [Line Items]
Investment in transmission and distribution																			$ 7,000,000,000
Cost reduction to transmission loop				$ 80,000,000
Cost reduction period (in years)				10 years
Duke Energy Florida \| Hurricane Idalia \| FPSC \| Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Deferred storm coats													$ 102,000,000
Number of customers impacted \| outage															200,000
Interim recovery payments	$ 166,000,000
Duke Energy Florida \| Hurricane Idalia, Retail Portion \| FPSC \| Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Interim recovery payments	92,000,000
Duke Energy Florida \| Hurricane Idalia, Projected Costs \| FPSC \| Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Interim recovery payments	$ 74,000,000
Duke Energy Florida \| 2022 North Carolina Rate Case \| FPSC \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), percent								4.00%
Duke Energy Florida \| 2022 North Carolina Rate Case \| FPSC \| Subsequent Event \| Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)									$ (127,000,000)	$ (95,000,000)	$ (596,000,000)