XML 110 R68.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 213 | $ 230
Net amounts recognized on the Condensed Consolidated Balance Sheet | 213 | 230
Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 32 | 66
Gross amounts offset | (4) | (3)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 28 | 63
Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 181 | 164
Gross amounts offset | (2) | (1)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 179 | 163
Duke Energy Carolinas [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 19 | 35
Net amounts recognized on the Condensed Consolidated Balance Sheet | 19 | 35
Duke Energy Carolinas [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 9 | 31
Gross amounts offset | (2) | (2)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 7 | 29
Duke Energy Carolinas [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 10 | 4
Gross amounts offset | (1) |
Net amounts recognized on the Condensed Consolidated Balance Sheet | 9 | 4
Progress Energy [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 35 | 36
Net amounts recognized on the Condensed Consolidated Balance Sheet | 35 | 36
Progress Energy [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 8 | 19
Gross amounts offset | (2) | (2)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 6 | 17
Progress Energy [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 27 | 17
Gross amounts offset | (1) | (1)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 26 | 16
Duke Energy Progress [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 21 | 18
Net amounts recognized on the Condensed Consolidated Balance Sheet | 21 | 18
Duke Energy Progress [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 5 | 8
Gross amounts offset | (2) | (2)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 3 | 6
Duke Energy Progress [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 16 | 10
Gross amounts offset | (1) | (1)
Net amounts recognized on the Condensed Consolidated Balance Sheet | 15 | 9
Duke Energy Florida [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 5 | 12
Net amounts recognized on the Condensed Consolidated Balance Sheet | 5 | 12
Duke Energy Florida [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 4 | 10
Net amounts recognized on the Condensed Consolidated Balance Sheet | 4 | 10
Duke Energy Florida [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 2
Net amounts recognized on the Condensed Consolidated Balance Sheet | 1 | 2
Duke Energy Ohio [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 4 | 5
Net amounts recognized on the Condensed Consolidated Balance Sheet | 4 | 5
Duke Energy Ohio [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 1
Net amounts recognized on the Condensed Consolidated Balance Sheet |  | 1
Duke Energy Ohio [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 4 | 4
Net amounts recognized on the Condensed Consolidated Balance Sheet | 4 | 4
Piedmont Natural Gas [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 150 | 142
Net amounts recognized on the Condensed Consolidated Balance Sheet | 150 | 142
Piedmont Natural Gas [Member] | Other Current Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 10 | 11
Net amounts recognized on the Condensed Consolidated Balance Sheet | 10 | 11
Piedmont Natural Gas [Member] | Other Noncurrent Liabilities [Member] |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 140 | 131
Net amounts recognized on the Condensed Consolidated Balance Sheet | $ 140 | $ 131

X
- Definition Fair value, before effects of master netting arrangements, of a financial liability or 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 liabilities elected not to be offset. Excludes liabilities 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 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 2: 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=109980867&loc=SL5624163-113959 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 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
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 liability or 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 liabilities 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 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 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=109250915&loc=d3e13433-108611 Reference 3: 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 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of asset associated with financial liability or 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 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 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 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeLiabilityFairValueGrossAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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