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- Definition

Requested Rider Revenue Increase

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Site Contingency, Environmental Remediation, Number of Sites

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- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

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- Definition

Percentage of public utility's approved return on equity.

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- Definition

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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- Definition

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

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- Definition

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

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- Definition

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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Amount of public utility's requested rate increase (decrease) with regulatory agency.

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- Definition

Percentage of public utility's requested return on equity.

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- Definition

The amount of regulated power revenues recognized during the period.

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) $ in Millions						1 Months Ended		3 Months Ended		6 Months Ended
	Aug. 06, 2020 USD ($)	Apr. 27, 2020 USD ($)	Jan. 31, 2020 USD ($)	Sep. 03, 2019 USD ($)	Apr. 13, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) site	Jun. 30, 2019 USD ($)	Jul. 23, 2020 USD ($)	Jul. 12, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 28, 2018 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulated operating revenue, electric, non-nuclear								$ 4,963	$ 5,423	$ 10,087	$ 10,708
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Regulated operating revenue, electric, non-nuclear								330	$ 336	676	$ 691
Duke Energy Ohio \| Ohio Base Rate Case 2017 \| PUCO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 15
Requested return on equity, percent						10.40%
Requested rate decrease, amended amount					$ 19
Requested rate increase (decrease) amended, percentage					9.84%
Public utilities, requested equity capital structure, percentage					50.75%
Public utilities, requested debt capital structure, percentage					49.25%
Approved rate increase (decrease), amount					$ (20)
Duke Energy Ohio \| Ohio Base Rate Case 2017 \| PUCO \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested rider revenue increase					$ 10
Duke Energy Ohio \| Energy Efficiency Cost Recovery \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulated operating revenue, electric, non-nuclear							$ 20
Duke Energy Ohio \| Natural Gas Pipeline extension \| OPSB \| Minimum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC								163		163
Duke Energy Ohio \| Natural Gas Pipeline extension \| OPSB \| Maximum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC								245		$ 245
Duke Energy Ohio \| MGP Cost Recovery - 2009 Through 2012 \| PUCO
Public Utilities, General Disclosures [Line Items]
Number of environmental remediation sites \| site										2
Regulatory assets								55		$ 55
Duke Energy Ohio \| MGP Cost Recovery - 2013 Through 2017 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets															$ 26
Duke Energy Ohio \| MGP Cost Recovery - 2013 Through 2017 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets															$ 12
Duke Energy Ohio \| MGP Cost Recovery - 2018 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets								$ 39		$ 39				$ 20
Duke Energy Ohio \| MGP Cost Recovery - 2018 \| PUCO \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Regulatory assets												$ 4
Duke Energy Ohio \| MGP Cost Recovery - 2018 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets													$ 11
Duke Energy Kentucky \| Duke Energy Kentucky Electric base rate case \| KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 46
Requested rate decrease, amended amount			$ (44)
Approved rate increase (decrease), amount		$ 24
Approved return on equity percentage		9.25%
Duke Energy Kentucky \| Duke Energy Kentucky Electric base rate case \| KPSC \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested rate decrease, amended amount	$ (5)