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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Public Utilities, Investment in Transmission and Distribution

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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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Utilities, Future Investment in Infrastructure

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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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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details) - Duke Energy Florida						3 Months Ended	12 Months Ended
	Oct. 17, 2022 USD ($)	Oct. 04, 2022 USD ($)	Jun. 15, 2022 USD ($)	May 04, 2021 USD ($)	Jul. 01, 2020 USD ($) plant MW	Mar. 31, 2023 USD ($)	Dec. 31, 2034 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 28, 2022 outage	Sep. 27, 2022 USD ($)	Apr. 11, 2022 USD ($)
Solar Project
Public Utilities, General Disclosures [Line Items]
Estimated cost of facilities					$ 1,000,000,000
FPSC
Public Utilities, General Disclosures [Line Items]
Number of solar plants \| plant					10
Generation capacity (MW) \| MW					750
FPSC \| Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Number of outages \| outage										1,100,000
Deferred storm coats						$ 357,000,000
Storm reserves									$ 132,000,000		$ 107,000,000
Interim recovery payments						442,000,000
2021 Settlement \| FPSC
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount						67,000,000
Public utilities, approved equity capital structure, percentage (as a percent)				53.00%
Public utilities, approved debt capital structure, percentage				47.00%
Public utilities, basis points, increase, percentage				0.25%
Contract with customer, asset, after allowance for credit loss, noncurrent			$ 154,000,000	$ 173,000,000		$ 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 \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Public utilities, basis points, increase, percentage				0.50%
2021 Settlement \| FPSC \| Minimum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)				8.85%
2021 Settlement \| FPSC \| Minimum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)				9.85%
2021 Settlement \| FPSC \| Maximum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)				10.85%
2021 Settlement \| FPSC \| Maximum \| US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)				10.10%
2021 Settlement \| FPSC \| Weighted Average
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)				9.85%
2021 Settlement \| FPSC \| Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount							$ 79,000,000	$ 49,000,000
Contract with customer, asset, after allowance for credit loss, noncurrent								$ 119,000,000
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