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Public Utilities, Regulatory Asset, Amount of Recovery Costs Disallowed

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Public Utilities, Requested Rate Increase (Decrease), Gross Amount

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Public Utilities, Requested Rate Increase (Decrease), Rider Reduction

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Public Utilities, Requested Rate Increase (Decrease), Rider Reduction, Tax Cuts And Jobs Act And Return Deferred Revenue

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of income (expense) related to nonoperating activities, classified as other.

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

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

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Amount of public utility's amended requested rate increase (decrease) with 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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Percentage of public utility's requested return on equity.

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Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

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Amount of income tax benefit for remeasurement of deferred tax liability from change in tax rate pursuant to Tax Cuts and Jobs Act.

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Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.

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Regulatory Matters (Duke Energy Progress Narrative) (Details) - USD ($) $ in Millions										12 Months Ended
	May 21, 2021	Apr. 16, 2021	Oct. 16, 2020	Oct. 30, 2019	Oct. 11, 2019	May 21, 2019	Nov. 08, 2018	Nov. 22, 2017	Jun. 01, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Public Utilities, General Disclosures [Line Items]
Regulatory assets										$ 14,637	$ 14,062
Impairment of assets and other charges										356	984	$ (8)
Other income and expenses, net										643	453	430
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets										4,651	4,468
Impairment of assets and other charges										63	499	12
Other income and expenses, net										143	75	$ 100
2017 North Carolina Rate Case \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)									$ 477
Requested rate increase (decrease), amended, amount									$ 420
Requested return on equity, percentage								9.90%
Requested capital structure, percentage								52.00%
Requested debt structure, percentage								48.00%
2019 North Carolina Rate Case \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 464
Requested rate increase (decrease), percent				12.30%
Requested gross rate case revenue increase				$ 586
Requested rate increase (decrease), rider reduction, tax cuts and jobs act and return deferred revenue				122
Requested EDIT rider decrease				$ 120
2019 North Carolina Rate Case \| North Carolina Utilities Commission \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission	$ 178
2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement \| North Carolina Utilities Commission \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage		9.60%
Approved capital structure, percentage		52.00%
Approved debt structure, percentage		48.00%
2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)							$ 59
Approved return on equity, percentage						9.50%
Approved capital structure, percentage						53.00%
Approved debt structure, percentage						47.00%
Tax benefit from change in enacted tax rates						$ (17)
Measurement period adjustment						(12)
FERC Return on Equity Complaint, North Carolina Eastern Municipal Power Agency \| FERC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage					11.00%
FERC Return on Equity Complaint, North Carolina Electric Membership Corporation \| FERC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage			11.00%
Grid Improvement \| 2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement \| North Carolina Utilities Commission \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 400
Storm cost deferrals
Public Utilities, General Disclosures [Line Items]
Regulatory assets										213	1,102
Storm cost deferrals \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets										170	785
Storm cost deferrals \| 2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement \| North Carolina Utilities Commission \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 714
AROs – coal ash
Public Utilities, General Disclosures [Line Items]
Regulatory assets										3,408	3,408
AROs – coal ash \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets										1,389	$ 1,347
AROs – coal ash \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets						4
Denied recovery costs						$ 65
Impairment of assets and other charges										42
Other income and expenses, net										$ 6
Asset retirement obligations - unprotected EDIT, Property, Plant and Equipment \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Recovery period						20 years
Asset retirement obligations - Unprotected EDIT \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Recovery period						5 years
Asset retirement obligations - deferred revenue \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Recovery period						3 years
State \| North Carolina DOR \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved increase (decrease) through EDIT Rider						$ 12