XML 150 R94.htm IDEA: XBRL DOCUMENT
v3.20.4

Debt and Credit Facilities (Annual Maturities) (Details) - USD ($) | Dec. 31, 2020 | Oct. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | $ 4,238,000,000 |  | $ 3,141,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 4,238,000,000 |  |
2022 | 4,905,000,000 |  |
2023 | 3,356,000,000 |  |
2024 | 1,344,000,000 |  |
2025 | 3,153,000,000 |  |
Thereafter | 41,983,000,000 |  |
Total long-term debt, including current maturities | 58,979,000,000 |  |
Purchase accounting adjustments | (1,300,000,000) |  | (1,500,000,000)
Other |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 478,000,000 |  |
Purchase Accounting Adjustments |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Purchase accounting adjustments | 1,346,000,000 |  |
Progress Energy |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 1,426,000,000 |  | 1,577,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 1,426,000,000 |  |
2022 | 1,736,000,000 |  |
2023 | 638,000,000 |  |
2024 | 76,000,000 |  |
2025 | 725,000,000 |  |
Thereafter | 14,802,000,000 |  |
Total long-term debt, including current maturities | $ 19,403,000,000 |  |
Progress Energy | Unsecured Debt |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
Repurchase amount |  | $ 500,000,000 |
Duke Energy (Parent) | Debt Maturing May 2021 | Unsecured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 0.721% |  |
Current maturities of long-term debt | $ 500,000,000 |  |
Duke Energy (Parent) | Debt Maturing September 2021 | Unsecured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 3.55% |  |
Current maturities of long-term debt | $ 500,000,000 |  |
Duke Energy (Parent) | Debt Maturing September 2021 1.80% | Unsecured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 1.80% |  |
Current maturities of long-term debt | $ 750,000,000 |  |
Piedmont |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 160,000,000 |  | 0
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 160,000,000 |  |
2023 | 45,000,000 |  |
2024 | 40,000,000 |  |
2025 | 205,000,000 |  |
Thereafter | 2,350,000,000 |  |
Total long-term debt, including current maturities | $ 2,800,000,000 |  |
Piedmont | Debt Maturing June 2021 | Unsecured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 4.24% |  |
Current maturities of long-term debt | $ 160,000,000 |  |
Duke Energy Florida |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 823,000,000 |  | 571,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 823,000,000 |  |
2022 | 78,000,000 |  |
2023 | 77,000,000 |  |
2024 | 66,000,000 |  |
2025 | 64,000,000 |  |
Thereafter | 6,878,000,000 |  |
Total long-term debt, including current maturities | $ 7,986,000,000 |  |
Duke Energy Florida | Debt Maturing November 2021 | Unsecured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 0.482% |  |
Current maturities of long-term debt | $ 200,000,000 |  |
Duke Energy Florida | Debt Maturing April 2021 | Secured Debt |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 0.972% |  |
Current maturities of long-term debt | $ 250,000,000 |  |
Duke Energy Florida | Debt Maturing August 2021 | First Mortgage Bonds |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 3.10% |  |
Current maturities of long-term debt | $ 300,000,000 |  |
Duke Energy Carolinas |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 506,000,000 |  | 458,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 506,000,000 |  |
2022 | 721,000,000 |  |
2023 | 1,008,000,000 |  |
2024 | 9,000,000 |  |
2025 | 310,000,000 |  |
Thereafter | 9,745,000,000 |  |
Total long-term debt, including current maturities | $ 12,299,000,000 |  |
Duke Energy Carolinas | Debt Maturing June 2021 | First Mortgage Bonds |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 3.90% |  |
Current maturities of long-term debt | $ 500,000,000 |  |
Duke Energy Progress |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 603,000,000 |  | 1,006,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 603,000,000 |  |
2022 | 1,208,000,000 |  |
2023 | 561,000,000 |  |
2024 | 10,000,000 |  |
2025 | 661,000,000 |  |
Thereafter | 6,274,000,000 |  |
Total long-term debt, including current maturities | $ 9,317,000,000 |  |
Duke Energy Progress | Debt Maturing September 2021 | First Mortgage Bonds |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 3.00% |  |
Current maturities of long-term debt | $ 500,000,000 |  |
Duke Energy Progress | Debt Maturing September 2021 | First Mortgage Bonds |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Interest Rate | 8.625% |  |
Current maturities of long-term debt | $ 100,000,000 |  |
Duke Energy Ohio |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 50,000,000 |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 50,000,000 |  |
2023 | 325,000,000 |  |
2025 | 270,000,000 |  |
Thereafter | 2,486,000,000 |  |
Total long-term debt, including current maturities | 3,131,000,000 |  |
Duke Energy Indiana |  |  |
Current Maturities Of Long Term Debt [Abstract] |  |  |
Current maturities of long-term debt | 70,000,000 |  | $ 503,000,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |
2021 | 70,000,000 |  |
2022 | 84,000,000 |  |
2023 | 3,000,000 |  |
2024 | 4,000,000 |  |
2025 | 154,000,000 |  |
Thereafter | 3,818,000,000 |  |
Total long-term debt, including current maturities | $ 4,133,000,000 |  |

X
- Definition Current Maturities of Long Term Debt + References No definition available. + Details
Name: | duk_CurrentMaturitiesOfLongTermDebtAbstract
Namespace Prefix: | duk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date, excluding purchase accounting adjustments. + References No definition available. + Details
Name: | duk_LongTermDebtExcludingPurchaseAccountingAdjustments
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value amount of debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_PurchaseAccountingAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingMay2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingSeptember2021355Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingSeptember2021180Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingJune2021Member
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_DebtInstrumentAxis=duk_DebtMaturingNovember2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingApril2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingAugust2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_FirstMortgageMember
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: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingSeptember2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=duk_DebtMaturingSeptember20212Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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