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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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Public Utilities, Solar Generation Capacity Plants, in Megawatts

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Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)

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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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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details) $ in Millions										3 Months Ended		9 Months Ended
	May 21, 2021 USD ($)	Apr. 16, 2021 USD ($)	Oct. 16, 2020	Oct. 30, 2019 USD ($)	Oct. 11, 2019	May 21, 2019 USD ($)	Nov. 08, 2018 USD ($)	Nov. 22, 2017	Jun. 01, 2017 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jul. 27, 2020 MW
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges										$ 211	$ 28	$ 342	$ 36
Other income and expenses, net										238	127	493	310
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges										42	$ 5	60	$ 5
Duke Energy Progress \| Western Carolinas Modernization Plan
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW														5
Duke Energy Progress \| NCUC \| 2017 North Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount									$ 477
Requested rate increase (decrease), amended amount									$ 420
Requested return on equity, percent								9.90%
Public utilities, requested equity capital structure, percentage								52.00%
Public utilities, requested debt capital structure, percentage								48.00%
Duke Energy Progress \| NCUC \| 2019 North Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 464
Requested rate increase, percentage				12.30%
Requested rate increase (decrease), gross amount				$ 586
Rider reduction				122
Requested rate increase (decrease), rider reduction				$ 120
Approved rate increase, amount	$ 178
Duke Energy Progress \| NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage		9.60%
Public utilities, approved equity capital structure, percentage		52.00%
Public utilities, approved debt capital structure, percentage		48.00%
Duke Energy Progress \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount							$ 59
Approved return on equity percentage						9.50%
Public utilities, approved equity capital structure, percentage						53.00%
Public utilities, approved debt capital structure, percentage						47.00%
Change in tax rate, deferred tax liability, income tax benefit						$ 17
Measurement period adjustment, income tax expense (benefit)						12
Duke Energy Progress \| FERC \| FERC Return on Equity Complaint, NCEMPA
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage					11.00%
Duke Energy Progress \| FERC \| FERC Return on Equity Complaint, NCEMC
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage			11.00%
Duke Energy Progress \| State and local jurisdiction \| North Carolina Department of Revenue \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
State and local taxes increase amount						12
Duke Energy Progress \| Grid Improvement \| NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 400
Duke Energy Progress \| Storm costs \| NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 714
Duke Energy Progress \| Asset retirement obligations - coal ash \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory assets						$ 4
Regulatory asset, amortization period						5 years
Recovery costs denied						$ 65
Impairment of assets and other charges										42		42
Other income and expenses, net										$ 6		$ 6
Duke Energy Progress \| Asset retirement obligations - unprotected EDIT, Property, Plant and Equipment \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory asset, amortization period						20 years
Duke Energy Progress \| Asset retirement obligations - unprotected EDIT \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory asset, amortization period						5 years
Duke Energy Progress \| Asset retirement obligations - deferred revenue \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory asset, amortization period						3 years