XML 221 R164.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Income Taxes (Other Disclosures) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | $ 125 | $ 126 | $ 24
Unrecognized tax benefit increases |  |  |  | 105
Gross decreases – tax positions in prior periods |  | (86) | (2) | (3)
Gross increases – current period tax positions |  | 12 | 4 |
Reduction due to lapse of statute of limitations |  |  | (3) |
Total changes |  | (74) | (1) | 102
Unrecognized tax benefits – December 31 | $ 51 | 51 | 125 | 126
Amount that if recognized, would affect the effective tax rate or regulatory liability | 47 | 47 |  |
Federal capital gain | 426 |  |  |
Duke Energy Carolinas |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 10 | 8 | 6
Unrecognized tax benefit increases |  |  |  | 2
Gross increases – current period tax positions |  | 3 | 2 |
Total changes |  | 3 | 2 | 2
Unrecognized tax benefits – December 31 | 13 | 13 | 10 | 8
Amount that if recognized, would affect the effective tax rate or regulatory liability | 13 | 13 |  |
Progress Energy |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 10 | 9 | 9
Unrecognized tax benefit increases |  |  |  | 1
Gross decreases – tax positions in prior periods |  |  |  | (1)
Gross increases – current period tax positions |  | 5 | 1 |
Total changes |  | 5 | 1 |
Unrecognized tax benefits – December 31 | 15 | 15 | 10 | 9
Amount that if recognized, would affect the effective tax rate or regulatory liability | 14 | 14 |  |
Duke Energy Progress |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 6 | 6 | 6
Unrecognized tax benefit increases |  |  |  | 1
Gross decreases – tax positions in prior periods |  |  |  | (1)
Gross increases – current period tax positions |  | 4 |  |
Total changes |  | 4 |  |
Unrecognized tax benefits – December 31 | 10 | 10 | 6 | 6
Amount that if recognized, would affect the effective tax rate or regulatory liability | 10 | 10 |  |
Duke Energy Florida |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 3 | 3 | 3
Gross increases – current period tax positions |  | 1 |  |
Total changes |  | 1 |  |
Unrecognized tax benefits – December 31 | 4 | 4 | 3 | 3
Amount that if recognized, would affect the effective tax rate or regulatory liability | 4 | 4 |  |
Duke Energy Ohio |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 1 | 1 | 1
Unrecognized tax benefits – December 31 | 1 | 1 | 1 | 1
Amount that if recognized, would affect the effective tax rate or regulatory liability | 1 | 1 |  |
Duke Energy Indiana |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 1 | 1 | 1
Gross increases – current period tax positions |  | 1 |  |
Total changes |  | 1 |  |
Unrecognized tax benefits – December 31 | 2 | 2 | 1 | 1
Amount that if recognized, would affect the effective tax rate or regulatory liability | 2 | 2 |  |
Piedmont |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Unrecognized tax benefits – January 1 |  | 1 | 4 | 4
Gross increases – current period tax positions |  | 3 |  |
Reduction due to lapse of statute of limitations |  |  | (3) |
Total changes |  | 3 | (3) |
Unrecognized tax benefits – December 31 | 4 | 4 | $ 1 | $ 4
Amount that if recognized, would affect the effective tax rate or regulatory liability | $ 4 | $ 4 |  |

X
- Definition Federal Capital Gain, Amount + References No definition available. + Details
Name: | duk_FederalCapitalGainAmount
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrecognized Tax Benefits, Other Increases (Decreases) + References No definition available. + Details
Name: | duk_UnrecognizedTaxBenefitsOtherIncreasesDecreases
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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: |