XML 173 R117.htm IDEA: XBRL DOCUMENT
v3.20.4

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Offsetting Assets [Line Items] |  |
Gross amounts recognized | $ 61 | $ 25
Net amounts presented on Balance Sheets | 61 | 25
Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 48 | 24
Gross amounts offset | (3) | (1)
Net amounts presented on Balance Sheets | 45 | 23
Noncurrent assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 13 | 1
Gross amounts offset | (5) |
Net amounts presented on Balance Sheets | 8 | 1
Duke Energy Carolinas |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 20 |
Duke Energy Carolinas | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 14 |
Gross amounts offset | (2) |
Net amounts presented on Balance Sheets | 12 |
Duke Energy Carolinas | Noncurrent assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 6 |
Gross amounts offset | (1) |
Net amounts presented on Balance Sheets | 5 |
Progress Energy |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 33 | 7
Net amounts presented on Balance Sheets | 33 | 7
Progress Energy | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 27 | 7
Gross amounts offset | (2) | (1)
Net amounts presented on Balance Sheets | 25 | 6
Progress Energy | Noncurrent assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 6 |
Gross amounts offset | (4) |
Net amounts presented on Balance Sheets | 2 |
Duke Energy Progress |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 33 |
Net amounts presented on Balance Sheets | 33 |
Duke Energy Progress | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 27 |
Gross amounts offset | (2) |
Net amounts presented on Balance Sheets | 25 |
Duke Energy Progress | Noncurrent assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 6 |
Gross amounts offset | (4) |
Net amounts presented on Balance Sheets | 2 |
Duke Energy Florida |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized |  | 7
Net amounts presented on Balance Sheets |  | 7
Duke Energy Florida | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized |  | 7
Gross amounts offset |  | (1)
Net amounts presented on Balance Sheets |  | 6
Duke Energy Ohio |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 1 | 4
Duke Energy Ohio | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 1 | 3
Net amounts presented on Balance Sheets | 1 | 3
Duke Energy Ohio | Noncurrent assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized |  | 1
Net amounts presented on Balance Sheets |  | 1
Duke Energy Indiana |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 6 | 13
Net amounts presented on Balance Sheets | 6 | 13
Duke Energy Indiana | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 6 | 13
Net amounts presented on Balance Sheets | 6 | 13
Piedmont |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 1 | 1
Net amounts presented on Balance Sheets | 1 | 1
Piedmont | Current Assets |  |
Offsetting Assets [Line Items] |  |
Gross amounts recognized | 1 | 1
Net amounts presented on Balance Sheets | $ 1 | $ 1

X
- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssetFairValueGrossLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
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_ProgressEnergyMember
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: | 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: |

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