Effective Income Tax Rate Reconciliation, State and Local Taxes, Increase (Reduction), Amount

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Estimated Storm Costs - Capital Investments

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Estimated Storm Costs - Operation Maintenance

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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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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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- Definition

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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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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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) - Duke Energy Progress $ in Millions	Apr. 26, 2021 USD ($)	Apr. 16, 2021 USD ($)	Oct. 16, 2020	Oct. 30, 2019 USD ($)	Oct. 11, 2019	May 21, 2019 USD ($)	Nov. 08, 2018 USD ($)	Nov. 22, 2017	Jun. 01, 2017 USD ($)	Dec. 31, 2020 USD ($)	Jul. 27, 2020 MW	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)
Hurricane Dorian storm damage
Public Utilities, General Disclosures [Line Items]
Estimated storm costs - O&M													$ 168
Estimated storm costs - capital investments													$ 4
Western Carolinas Modernization Plan
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) \| MW											5
FERC \| FERC Return on Equity Complaint, NCEMPA
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage					11.00%
FERC \| FERC Return on Equity Complaint, NCEMC
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage			11.00%
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
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%
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
NCUC \| 2019 North Carolina Rate Case \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 178
NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement \| Subsequent event
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%
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
Grid Improvement \| NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 400
Storm costs \| Hurricane Dorian storm damage
Public Utilities, General Disclosures [Line Items]
Regulatory assets										$ 145		$ 145
Storm costs \| NCUC \| 2019 North Carolina Rate Case, additional Agreement and Stipulation of Partial Settlement \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 714
Asset retirement obligations - coal ash \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory assets						4
Recovery costs denied						$ 65
Regulatory asset, amortization period						5 years
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
Asset retirement obligations - unprotected EDIT \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory asset, amortization period						5 years
Asset retirement obligations - deferred revenue \| PSCSC \| South Carolina Rate Case 2018
Public Utilities, General Disclosures [Line Items]
Regulatory asset, amortization period						3 years