Entity Shell Company Entity Shell Company Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Document Information [Line Items] Document Information [Line Items] Auditor Name Auditor Name ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Auditor Location Auditor Location Amendment Flag Amendment Flag Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Entity Current Reporting Status Entity Current Reporting Status Entity File Number Entity File Number Entity Small Business Entity Small Business Duke Energy Carolinas Duke Energy Carolinas [Member] Duke Energy Carolinas Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Auditor Firm ID Auditor Firm ID Entity Address, State or Province Entity Address, State or Province Document Transition Report Document Transition Report Entity Address, Address Line One Entity Address, Address Line One City Area Code City Area Code Document Fiscal Period Focus Document Fiscal Period Focus Entity Voluntary Filers Entity Voluntary Filers Cover [Abstract] Cover [Abstract] Document Period End Date Document Period End Date Document Information [Table] Document Information [Table] Current Fiscal Year End Date Current Fiscal Year End Date Entity Central Index Key Entity Central Index Key Legal Entity [Axis] Legal Entity [Axis] Entity Tax Identification Number Entity Tax Identification Number Document Annual Report Document Annual Report Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Registrant Name Entity Registrant Name Entity [Domain] Entity [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Address, City or Town Entity Address, City or Town Document Type Document Type Entity Interactive Data Current Entity Interactive Data Current