Estimated Capital Cost Excluding AFUDC

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- Definition

Number of Nuclear Generating Facilities Eligible for Funding

+ References

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- Definition

Site Contingency, Environmental Remediation, Number of Sites

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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

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) - Duke Energy Ohio $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) site	Jul. 23, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jan. 01, 2020 plant	Jul. 12, 2019 USD ($)	Mar. 29, 2019 USD ($)	Sep. 28, 2018 USD ($)
Public Utilities, General Disclosures [Line Items]
Number of nuclear generating facilities eligible for funding \| plant				2
Natural Gas Pipeline extension \| OPSB \| Minimum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC	$ 163
Natural Gas Pipeline extension \| OPSB \| Maximum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC	$ 245
MGP Cost Recovery - 2009 Through 2012 \| PUCO
Public Utilities, General Disclosures [Line Items]
Number of environmental remediation sites \| site	2
Regulatory assets	$ 55
MGP Cost Recovery - 2013 Through 2017 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets							$ 26
MGP Cost Recovery - 2013 Through 2017 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets							$ 12
MGP Cost Recovery - 2018 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets						$ 20
MGP Cost Recovery - 2018 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets					$ 11
MGP Cost Recovery - 2019 \| PUCO
Public Utilities, General Disclosures [Line Items]
Regulatory assets			$ 39
MGP Cost Recovery - 2019 \| PUCO \| MGP Costs - regulatory disallowance
Public Utilities, General Disclosures [Line Items]
Regulatory assets		$ 4