Effective Income Tax Rate Reconciliation, State and Local Taxes, Increase (Reduction), Amount

No definition available.

Name:	duk_EffectiveIncomeTaxRateReconciliationStateandLocalTaxesIncreaseReductionAmount
Namespace Prefix:	duk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Public Utilities, Operating License, Comment Period

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesOperatingLicenseCommentPeriod
Namespace Prefix:	duk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Operating License Extension, Period

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesOperatingLicenseExtensionPeriod
Namespace Prefix:	duk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Operating License, Number of Contentions

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesOperatingLicenseNumberOfContentions
Namespace Prefix:	duk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Operating License, Period

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesOperatingLicensePeriod
Namespace Prefix:	duk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Regulatory Asset, Amount of Recovery Costs Disallowed

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesRegulatoryAssetAmountofRecoveryCostsDisallowed
Namespace Prefix:	duk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Public Utilities, Requested Rate Increase (Decrease), Gross Amount

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesRequestedRateIncreaseDecreaseGrossAmount
Namespace Prefix:	duk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Requested Rate Increase (Decrease), Rider Reduction

+ References

No definition available.

+ Details

Name:	duk_PublicUtilitiesRequestedRateIncreaseDecreaseRiderReduction
Namespace Prefix:	duk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228

+ Details

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

Name:	us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedDebtCapitalStructurePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedDebtCapitalStructurePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

Name:	us-gaap_RegulatoryAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of income tax benefit for remeasurement of deferred tax liability from change in tax rate pursuant to Tax Cuts and Jobs Act.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319

+ Details

Name:	us-gaap_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxLiabilityIncomeTaxBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2A
-Subparagraph (SAB Topic 5.EE.Q2(f))
-URI http://asc.fasb.org/extlink&oid=122134291&loc=SL116722634-122817

+ Details

Name:	us-gaap_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_RegulatoryAssetAxis=us-gaap_StormCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=duk_AssetretirementobligationscoalashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=duk_NuclearRegulatoryCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=duk_DukeEnergyCarolinasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=duk_NCUCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2017NCRateCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_NorthCarolinaRateCase2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=duk_NorthCarolinaUtilitiesCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_A2019NorthCarolinaRateCaseAdditionalAgreementandStipulationofPartialSettlementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=duk_GridImprovementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=duk_PSCSCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_SouthCarolinaRateCase2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=us-gaap_DeferredProjectCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=duk_AssetRetirementObligationsUnprotectedEDITPropertyPlantandEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=duk_AssetretirementobligationsUnprotectedEDITMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=duk_AssetRetirementObligationsDeferredRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=duk_NorthCarolinaDepartmentofRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=duk_OconeeNuclearStationSubsequentLicenseRenewalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=duk_OconeeNuclearStationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Regulatory Matters (Duke Energy Carolinas Narrative) (Details) $ in Millions												12 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	May 21, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2019 USD ($)	May 21, 2019 USD ($)	Nov. 08, 2018 USD ($)	Feb. 28, 2018	Aug. 25, 2017 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory assets												$ 14,637	$ 14,062
Impairment of assets and other charges												356	984	$ (8)
Other income and expenses, net												643	453	430
Storm cost deferrals
Public Utilities, General Disclosures [Line Items]
Regulatory assets												213	1,102
AROs – coal ash
Public Utilities, General Disclosures [Line Items]
Regulatory assets												$ 3,408	3,408
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension												20 years
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Regulatory assets												$ 3,479	3,469
Impairment of assets and other charges												227	476	17
Other income and expenses, net												270	177	$ 151
Duke Energy Carolinas \| Storm cost deferrals
Public Utilities, General Disclosures [Line Items]
Regulatory assets												22	205
Duke Energy Carolinas \| AROs – coal ash
Public Utilities, General Disclosures [Line Items]
Regulatory assets												1,227	$ 1,414
Duke Energy Carolinas \| NCUC \| 2017 North Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)											$ 647
Requested return on equity, percentage										9.90%
Requested capital structure, percentage										52.00%
Requested debt structure, percentage										48.00%
Duke Energy Carolinas \| NCUC \| 2019 North Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)							$ 291
Requested rate increase (decrease), percent							6.00%
Requested gross rate case revenue increase							$ 445
Requested EDIT rider decrease							$ 154
Duke Energy Carolinas \| North Carolina Utilities Commission \| 2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement
Public Utilities, General Disclosures [Line Items]
Approved return on equity, percentage						9.60%
Approved capital structure, percentage						52.00%
Approved debt structure, percentage						48.00%
Approved rate increase (decrease) amount by state commission					$ 33
Duke Energy Carolinas \| North Carolina Utilities Commission \| 2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement \| Grid Improvement
Public Utilities, General Disclosures [Line Items]
Regulatory assets						$ 800
Duke Energy Carolinas \| North Carolina Utilities Commission \| 2019 North Carolina Rate Case, Additional Agreement and Stipulation of Partial Settlement \| Storm cost deferrals
Public Utilities, General Disclosures [Line Items]
Regulatory assets						$ 213
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)									$ 168
Approved return on equity, percentage								9.50%
Approved capital structure, percentage								53.00%
Approved debt structure, percentage								47.00%
Tax benefit from change in enacted tax rates								$ (66)
Measurement period adjustment								(45)
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| Deferred project costs
Public Utilities, General Disclosures [Line Items]
Regulatory assets								$ 125
Recovery period								12 years
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| AROs – coal ash
Public Utilities, General Disclosures [Line Items]
Regulatory assets								$ 96
Recovery period								5 years
Denied recovery costs								$ 115
Impairment of assets and other charges												160
Other income and expenses, net												$ 31
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| Asset retirement obligations - unprotected EDIT, Property, Plant and Equipment
Public Utilities, General Disclosures [Line Items]
Recovery period								20 years
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| Asset retirement obligations - Unprotected EDIT
Public Utilities, General Disclosures [Line Items]
Recovery period								5 years
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| Asset retirement obligations - deferred revenue
Public Utilities, General Disclosures [Line Items]
Recovery period								5 years
Duke Energy Carolinas \| PSCSC \| 2018 South Carolina Rate Case \| State \| North Carolina DOR
Public Utilities, General Disclosures [Line Items]
Recovery period								5 years
Approved decrease through EDIT Rider								$ 17
Duke Energy Carolinas \| Nuclear Regulatory Commission \| Oconee Nuclear Station Subsequent License Renewal
Public Utilities, General Disclosures [Line Items]
Comment period		60 days
Number of contentions \| contention	3
Duke Energy Carolinas \| Nuclear Regulatory Commission \| Oconee Nuclear Station Subsequent License Renewal \| Oconee
Public Utilities, General Disclosures [Line Items]
Operating license extension			20 years
Operating license			80 years	60 years