v3.3.0.814

Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | $ 1,370 | $ 2,036 | $ 1,931 | $ 1,501
Restricted receivables of VIEs | 2,037 | 1,973 |  |
Other current assets | 1,566 | 1,837 |  |
Investments and other assets | 3,205 | 3,008 |  |
Property, plant and equipment, cost | 110,795 | 104,861 |  |
Accumulated depreciation and amortization | (37,479) | (34,824) |  |
Other deferred debits | 188 | 171 |  |
Accounts payable | 2,078 | 2,271 |  |
Current maturities of long-term debt | 2,536 | 2,807 |  |
Other current liabilities | 2,052 | 2,188 |  |
Long-Term Debt | 37,667 | 37,213 |  |
Deferred income taxes | 13,999 | 13,423 |  |
Asset retirement obligation | 9,713 | 8,466 |  |
Other liabilities | 1,595 | 1,675 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 2 |  |  |
Restricted receivables of VIEs | 2,037 | 1,973 |  |
Other current assets | 222 | 74 |  |
Investments and other assets | 25 | 50 |  |
Property, plant and equipment, cost | 1,945 | 1,873 |  |
Accumulated depreciation and amortization | (307) | (255) |  |
Other deferred debits | 38 | 36 |  |
Total assets | 3,962 | 3,751 |  |
Accounts payable | 6 | 3 |  |
Taxes accrued | 15 | 6 |  |
Current maturities of long-term debt | 91 | 84 |  |
Other current liabilities | 27 | 21 |  |
Long-Term Debt | 2,169 | 2,234 |  |
Deferred income taxes | 325 | 283 |  |
Asset retirement obligation | 30 | 29 |  |
Other liabilities | 42 | 38 |  |
Total liabilities | 2,705 | 2,698 |  |
Net assets of consolidated VIEs | 1,257 | 1,053 |  |
Duke Energy Carolinas [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 198 | 13 | 34 | 23
Restricted receivables of VIEs | 687 | 647 |  |
Other current assets | 164 | 77 |  |
Investments and other assets | 1,018 | 959 |  |
Property, plant and equipment, cost | 38,653 | 37,372 |  |
Accumulated depreciation and amortization | (13,445) | (12,700) |  |
Other deferred debits | 43 | 42 |  |
Accounts payable | 623 | 709 |  |
Current maturities of long-term debt | 506 | 507 |  |
Other current liabilities | 415 | 434 |  |
Long-Term Debt | 8,078 | 7,584 |  |
Deferred income taxes | 6,067 | 5,812 |  |
Asset retirement obligation | 3,599 | 3,428 |  |
Other liabilities | 618 | 642 |  |
Duke Energy Progress [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 123 | 9 | 6 | 21
Restricted receivables of VIEs | 468 | 436 |  |
Other current assets | 53 | 384 |  |
Investments and other assets | 484 | 412 |  |
Property, plant and equipment, cost | 26,919 | 24,207 |  |
Accumulated depreciation and amortization | (10,207) | (9,021) |  |
Other deferred debits | 40 | 34 |  |
Accounts payable | 381 | 481 |  |
Current maturities of long-term debt | 402 | 945 |  |
Other current liabilities | 375 | 409 |  |
Long-Term Debt | 6,449 | 5,256 |  |
Deferred income taxes | 3,097 | 2,908 |  |
Asset retirement obligation | 4,489 | 3,905 |  |
Other liabilities | 120 | 168 |  |
Duke Energy Florida [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 16 | 8 | $ 15 | $ 16
Restricted receivables of VIEs | 395 | 305 |  |
Other current assets | 179 | 521 |  |
Investments and other assets | 308 | 204 |  |
Property, plant and equipment, cost | 15,011 | 14,433 |  |
Accumulated depreciation and amortization | (4,648) | (4,478) |  |
Other deferred debits | 36 | 39 |  |
Accounts payable | 316 | 365 |  |
Current maturities of long-term debt | 563 | 562 |  |
Other current liabilities | 553 | 586 |  |
Long-Term Debt | 4,287 | 4,298 |  |
Deferred income taxes | 2,579 | 2,452 |  |
Asset retirement obligation | 732 | 806 |  |
Other liabilities | 157 | 158 |  |
DERF [Member] | Duke Energy Carolinas [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Restricted receivables of VIEs | 687 | 647 |  |
Total assets | 687 | 647 |  |
Taxes accrued | 5 |  |  |
Long-Term Debt | 400 | 400 |  |
Total liabilities | 405 | 400 |  |
Net assets of consolidated VIEs | 282 | 247 |  |
DEPR [Member] | Duke Energy Progress [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Restricted receivables of VIEs | 468 | 436 |  |
Other current assets | 1 |  |  |
Total assets | 469 | 436 |  |
Taxes accrued | 3 |  |  |
Long-Term Debt | 300 | 300 |  |
Total liabilities | 303 | 300 |  |
Net assets of consolidated VIEs | 166 | 136 |  |
DEFR [Member] | Duke Energy Florida [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Restricted receivables of VIEs | 395 | 305 |  |
Other current assets | 2 |  |  |
Total assets | 397 | 305 |  |
Taxes accrued | 1 |  |  |
Long-Term Debt | 225 | 225 |  |
Total liabilities | 226 | 225 |  |
Net assets of consolidated VIEs | 171 | 80 |  |
Cinergy Receivables [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Restricted receivables of VIEs | 453 | 547 |  |
Total assets | 453 | 547 |  |
Long-Term Debt | 325 | 325 |  |
Total liabilities | 325 | 325 |  |
Net assets of consolidated VIEs | 128 | 222 |  |
Renewables [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 2 |  |  |
Restricted receivables of VIEs | 12 | 20 |  |
Other current assets | 215 | 68 |  |
Investments and other assets | 20 | 25 |  |
Property, plant and equipment, cost | 1,926 | 1,855 |  |
Accumulated depreciation and amortization | (302) | (250) |  |
Other deferred debits | 37 | 34 |  |
Total assets | 1,910 | 1,752 |  |
Accounts payable | 6 | 3 |  |
Taxes accrued | 6 | 6 |  |
Current maturities of long-term debt | 73 | 68 |  |
Other current liabilities | 23 | 16 |  |
Long-Term Debt | 916 | 967 |  |
Deferred income taxes | 325 | 283 |  |
Asset retirement obligation | 30 | 29 |  |
Other liabilities | 42 | 34 |  |
Total liabilities | 1,421 | 1,406 |  |
Net assets of consolidated VIEs | 489 | 346 |  |
Other VIEs [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] |  |  |  |
Restricted receivables of VIEs | 22 | 18 |  |
Other current assets | 4 | 6 |  |
Investments and other assets | 5 | 25 |  |
Property, plant and equipment, cost | 19 | 18 |  |
Accumulated depreciation and amortization | (5) | (5) |  |
Other deferred debits | 1 | 2 |  |
Total assets | 46 | 64 |  |
Current maturities of long-term debt | 18 | 16 |  |
Other current liabilities | 4 | 5 |  |
Long-Term Debt | 3 | 17 |  |
Other liabilities |  | 4 |  |
Total liabilities | 25 | 42 |  |
Net assets of consolidated VIEs | $ 21 | $ 22 |  |

X
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AccountsPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount owed to the reporting entity by counterparties in securitized loan transactions. + References No definition available. + Details
Name: | us-gaap_AccountsReceivableFromSecuritization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(1) -Article 7 + Details
Name: | us-gaap_AccruedIncomeTaxesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_AssetRetirementObligationsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total carrying amount as of the balance sheet date of unearned revenue or income, not otherwise specified in the taxonomy, which is expected to be taken into income in future periods and obligations not separately disclosed in the balance sheet (other liabilities). + References No definition available. + Details
Name: | us-gaap_DeferredCreditsAndOtherLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences, after deferred tax asset, and other tax liabilities expected to be paid after one year or operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6904-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765 + Details
Name: | us-gaap_OtherLiabilitiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 8 -Article 5 + Details
Name: | us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685 + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net carrying amount of the consolidated Variable Interest Entity's assets and liabilities included in the reporting entity's statement of financial position. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685 + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyCarolinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_DerfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_DeprMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_DefrmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_CinergyReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_RenewablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=duk_OtherViesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |