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- Definition

Public Utilities, Additional Approved Rate Increase (Decrease), Amount

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- Definition

Requested Rider Revenue Increase

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- Definition

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.

+ References

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- Definition

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

+ References

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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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- Definition

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 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
-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	9 Months Ended
	Oct. 16, 2020 USD ($)	Apr. 27, 2020 USD ($)	Jan. 31, 2020 USD ($)	Sep. 03, 2019 USD ($)	Apr. 13, 2018 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2020 USD ($) site	Jul. 23, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jul. 12, 2019 USD ($)	Mar. 29, 2019 USD ($)	Sep. 28, 2018 USD ($)
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 increase (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 \| Natural Gas Pipeline extension \| OPSB \| Minimum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC							$ 163
Duke Energy Ohio \| Natural Gas Pipeline extension \| OPSB \| Maximum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC							$ 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
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											$ 20
Duke Energy Ohio \| MGP Cost Recovery - 2018 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets										$ 11
Duke Energy Ohio \| MGP Cost Recovery - 2019 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets								$ 4	$ 39
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 increase (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]
Approved rate increase (decrease), amount	$ 28
Approved additional increase	$ 4