Coal-Fired Generation Capacity, in Megawatts

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Dual Capability Combined-cycle Natural Gas Plants, Number of Plants to be Constructed Capacity in Megawatts

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Estimated Storm Costs - Capital Investments

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Estimated Storm Costs - Operation Maintenance

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Estimated capital cost of new project

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

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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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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Percentage of public utility's approved return on equity.

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Percentage of public utility's requested debt 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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Percentage of public utility's amended 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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Regulatory Matters (Duke Energy Progress Narrative) (Details) customer in Thousands, $ in Millions									1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) customer	May 21, 2019 USD ($)	Nov. 08, 2018 USD ($)	Nov. 22, 2017	Aug. 25, 2017 USD ($)	Jun. 01, 2017 USD ($)	Nov. 04, 2015 plant MW	Feb. 28, 2018	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) MW	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Public Utilities, General Disclosures [Line Items]
Total income (loss) from continuing operations before income taxes											$ 4,097	$ 3,073	$ 4,266
Regulatory assets											15,018	15,622
Net property, plant and equipment											102,127	91,694
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Total income (loss) from continuing operations before income taxes											962	827	1,007
Regulatory assets											4,678	4,814
Net property, plant and equipment											22,934	20,398
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Total income (loss) from continuing operations before income taxes											1,714	1,374	$ 1,866
Regulatory assets											3,910	3,977
Net property, plant and equipment											32,397	29,245
2017 North Carolina Rate Case \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)							$ 477
Requested rate increase (decrease), percent							14.90%
Requested rate increase (decrease), amended, amount							$ 420
Requested rate increase (decrease), amended, percentage							13.00%
Requested return on equity, percentage					9.90%
Requested capital structure, percentage					52.00%
Requested debt structure, percentage					48.00%
Total income (loss) from continuing operations before income taxes										$ (68)
2017 North Carolina Rate Case \| NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)						$ 647
Requested rate increase (decrease), percent						13.60%
Requested return on equity, percentage									9.90%
Requested capital structure, percentage									52.00%
Requested debt structure, percentage									48.00%
Total income (loss) from continuing operations before income taxes										$ (14)
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 \| NCUC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)		$ 291
Requested rate increase (decrease), percent		6.00%
Requested gross rate case revenue increase		$ 445
Requested EDIT rider decrease		$ 154
Hurricane Dorian Storm Damage \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Estimated storm costs - operation maintenance											205
Estimated storm costs - capital investments											$ 4
2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 59
Requested rate increase (decrease), percent				10.30%
Measurement period adjustments			$ (12)	$ (10)
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)
2018 South Carolina Rate Case \| PSCSC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 168
Requested rate increase (decrease), percent				10.00%
Measurement period adjustments			$ (45)	$ (46)
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			$ (66)	66
Western Carolinas Modernization Plan \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Number of plants to be constructed \| plant								2
Plants to be constructed capacity (in MW) \| MW								280
Western Carolinas Modernization Plan \| NCUC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Recovery period											10 years
Estimated capital cost											$ 893
North Carolina \| Hurricane Dorian Storm Damage \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Customers experiencing outages \| customer		270
South Carolina \| Hurricane Dorian Storm Damage \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Customers experiencing outages \| customer		30
Storm cost deferrals
Public Utilities, General Disclosures [Line Items]
Regulatory assets											1,399	1,117
Storm cost deferrals \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets											801	571
Storm cost deferrals \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets											178	160
Storm cost deferrals \| Hurricane Dorian Storm Damage \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets											179
AROs – coal ash
Public Utilities, General Disclosures [Line Items]
Regulatory assets											4,084	4,255
AROs – coal ash \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets											1,834	2,051
AROs – coal ash \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets											$ 1,696	1,725
AROs – coal ash \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Regulatory assets			4	$ 51
Recovery period				5 years
Denied recovery costs			65
AROs – coal ash \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets			96	$ 242
Recovery period				5 years
Denied recovery costs			115
North Carolina DOR \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Measurement period adjustments				$ (17)
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	$ 12
State \| North Carolina DOR \| 2018 South Carolina Rate Case \| PSCSC \| Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Approved increase (decrease) through EDIT Rider			$ (17)
Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) \| MW											5,002
Generating facilities planned for retirement \| Asheville Plant \| Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) \| MW											376
Net property, plant and equipment											$ 214	$ 327