Public Utilities, Actual Storm Costs

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- Definition

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, Combined Cycle Plants, in Megawatts

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Public Utilities, Estimated Cost of Generation Facilities to be Built

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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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- 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 accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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Cash received for the settlement of litigation during the current period.

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- Definition

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 (Regulatory Matters Narrative - Duke Energy Florida) (Details) outage in Millions, customer in Millions									1 Months Ended	12 Months Ended
	Apr. 02, 2024	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 ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2024 USD ($)	Sep. 29, 2023 USD ($)	Aug. 30, 2023 customer	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 28, 2022 outage	Sep. 27, 2022 USD ($)	Apr. 11, 2022 USD ($)
Duke Energy Florida \| Solar Project
Public Utilities, General Disclosures [Line Items]
Estimated cost of facilities								$ 1,000,000,000
FPSC \| Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Number of solar plants \| plant								10
Generation capacity (MW) \| MW								750
2021 Settlement \| FPSC \| Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount														$ 49,000,000	$ 67,000,000
Public utilities, approved equity capital structure, percentage (as a percent)							53.00%
Public utilities, basis points, increase, percentage							0.25%
Contract with customer, asset, after allowance for credit loss, noncurrent						$ 154,000,000	$ 173,000,000									$ 149,000,000
Capitalized contract cost during period																$ 8,000,000				$ 54,000,000
Proceeds from legal settlements						$ 180,000,000
Requested rate increase (decrease), amount				$ (56,000,000)
Future investment in infrastructure							$ 1,000,000,000
2021 Settlement \| FPSC \| Duke Energy Florida \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Public utilities, basis points, increase, percentage							0.50%
2021 Settlement \| FPSC \| Duke Energy Florida \| Minimum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)							8.85%
2021 Settlement \| FPSC \| Duke Energy Florida \| Minimum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)							9.85%
2021 Settlement \| FPSC \| Duke Energy Florida \| Maximum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)							10.85%
2021 Settlement \| FPSC \| Duke Energy Florida \| Maximum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)							10.10%
2021 Settlement \| FPSC \| Duke Energy Florida \| Weighted Average
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)							9.85%
2021 Settlement \| FPSC \| Duke Energy Florida \| Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount													$ 79,000,000
Contract with customer, asset, after allowance for credit loss, noncurrent													$ 24,000,000
Storm Protection Plan \| FPSC \| Duke Energy Florida
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
Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Actual storm costs																	$ 431,000,000
Hurricane Ian \| FPSC \| Duke Energy Florida \| Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Number of outages \| outage																					1.1
Storm reserves																			$ 132,000,000			$ 107,000,000
Interim recovery payments			$ 442,000,000
Hurricane Idalia \| FPSC \| Duke Energy Florida \| Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Interim recovery payments		$ 74,000,000
Hurricane Idalia, Retail Portion \| FPSC \| Duke Energy Florida \| Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Interim recovery payments		92,000,000
Hurricane Idalia \| FPSC \| Duke Energy Florida \| Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Interim recovery payments		$ 166,000,000
Number of impacted customers \| customer																		0.2
2022 North Carolina Rate Case \| FPSC \| Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease) (as a percent)									4.00%
2022 North Carolina Rate Case \| FPSC \| Duke Energy Florida \| Weighted Average \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	11.15%
Public utilities, approved equity capital structure, percentage (as a percent)	53.00%
2022 North Carolina Rate Case \| FPSC \| Duke Energy Florida \| Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount										$ 129,000,000	$ 98,000,000	$ 593,000,000