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Public Utilities, Equity Ratio

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Public Utilities, Estimated Capital Cost Excluding AFUDC

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Site Contingency, Environmental Remediation, Number of Sites

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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

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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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Period end amount of total net PPE.

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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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The total amount of operating revenues recognized during the period.

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The amount of operating expenses for the period that are associated with the utility's normal revenue producing operation; including selling, general, and administrative expenses, costs incurred for routine plant repairs and maintenance, and operations.

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Regulatory Matters (Duke Energy Ohio Narrative) (Details) $ in Millions						3 Months Ended								12 Months Ended
	Dec. 01, 2022 USD ($)	Sep. 19, 2022 USD ($)	Jul. 14, 2022 USD ($)	May 19, 2022 USD ($)	Oct. 01, 2021 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) site	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Apr. 27, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Revenues						$ 7,351	$ 7,842	$ 6,564	$ 7,011	$ 6,117	$ 6,834	$ 5,638	$ 6,032	$ 28,768	$ 24,621	$ 23,366
Operation, maintenance and other														5,734	5,703	5,502
Income tax expense (benefit) from continuing operations														300	268	(169)
Public utilities, property, plant and equipment, net						111,748				105,536				111,748	105,536
Asset impairment charges														434	353	978
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Revenues														2,514	2,037	1,858
Operation, maintenance and other														523	479	463
Income tax expense (benefit) from continuing operations														(21)	30	$ 43
Impairment (reversal) of assets and other charges														(10)	25
Public utilities, property, plant and equipment, net						9,247				$ 8,625				9,247	8,625
Asset impairment charges														(10)	25
Duke Energy Ohio \| Duke Energy Ohio Electric Base Rate Case \| Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)					$ 55
Requested return on equity, percentage					10.30%
Requested rate increase (decrease), percent					3.30%
Approved rate increase (decrease) amount by state commission		$ 23
Approved return on equity, percentage		9.50%
Duke Energy Ohio \| Duke Energy Ohio Electric Base Rate Case \| Public Utilities Commission Of Ohio \| Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 2
Requested return on equity, percentage				8.84%
Duke Energy Ohio \| Duke Energy Ohio Electric Base Rate Case \| Public Utilities Commission Of Ohio \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 15
Requested return on equity, percentage				9.85%
Duke Energy Ohio \| Natural Gas Pipeline Extension \| Ohio Power Siting Board \| Minimum
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC						$ 170								$ 170
Duke Energy Ohio \| MGP Cost Recovery - 2009 Through 2012 \| Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Number of environmental remediation sites \| site														2
Duke Energy Ohio \| MGP Cost Recovery - 2013 Through 2019 \| Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Revenues														$ 15
Operation, maintenance and other														58
Income tax expense (benefit) from continuing operations														(72)
Duke Energy Ohio \| Propane caverns
Public Utilities, General Disclosures [Line Items]
Impairment (reversal) of assets and other charges														(12)
Public utilities, property, plant and equipment, net																	$ 7
Asset impairment charges															$ 19
Duke Energy Ohio \| Duke Energy Ohio Gas Base Rate Case \| Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)			$ 49
Requested return on equity, percentage			10.30%
Requested rate increase (decrease), percent			5.60%
Duke Energy Ohio \| Duke Energy Ohio Gas Base Rate Case \| Public Utilities Commission Of Ohio \| Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)														$ 24
Requested return on equity, percentage														9.03%
Duke Energy Ohio \| Duke Energy Ohio Gas Base Rate Case \| Public Utilities Commission Of Ohio \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)														$ 36
Requested return on equity, percentage														10.04%
Equity ratio (as a percent)														52.00%
Duke Energy Ohio \| Duke Energy Kentucky Electric Base Rate Case \| KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)	$ 75
Requested return on equity, percentage	10.35%
Requested rate increase (decrease), percent														17.80%