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Variable Interest Entities (Fair Value Assumptions) (Details) - CRC - VIE, Not Primary Beneficiary	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Duke Energy Ohio
Variable Interest Entity [Line Items]
Anticipated credit loss ratio	0.60%	0.50%
Discount rate	3.30%	3.00%
Receivable turnover rate	13.40%	13.50%
Duke Energy Indiana
Variable Interest Entity [Line Items]
Anticipated credit loss ratio	0.30%	0.30%
Discount rate	3.30%	3.00%
Receivable turnover rate	11.50%	11.00%

X

- Definition

The ratio of total receivables to total monthly billings, as related to total receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	duk_
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Balance Type:	na
Period Type:	instant

X

- Definition

Discount rate which is used to value residual cash flows generated by financial assets of a securitization, asset-backed financing arrangement, or similar transfer regardless of when the transfer occurred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719

+ Details

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Period Type:	duration

X

- Definition

Rate at which principal will not be repaid on securitized financial assets regardless of when the transfer occurred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719

+ Details

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X

- 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.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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