XML 135 R95.htm IDEA: XBRL DOCUMENT
v3.20.2

Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | $ 102 | $ 76
Cumulative Change in Accounting Principle | 133 | 76
Write-Offs | 12 | (7)
Credit Loss Expense | (9) | 24
Other Adjustments | 28 | 35
Balance at September 30, 2020 | 133 | 133
Duke Energy Carolinas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 14 | 10
Cumulative Change in Accounting Principle | 22 | 22
Write-Offs | (2) | (8)
Credit Loss Expense |  | 9
Other Adjustments | 10 | 10
Balance at September 30, 2020 | 22 | 22
Progress Energy |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 29 | 16
Cumulative Change in Accounting Principle | 37 | 16
Write-Offs | 15 | 8
Credit Loss Expense | (16) | 2
Other Adjustments | 9 | 9
Balance at September 30, 2020 | 37 | 37
Duke Energy Progress |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 14 | 8
Cumulative Change in Accounting Principle | 21 | 8
Write-Offs | 13 | 8
Credit Loss Expense | (15) | (5)
Other Adjustments | 9 | 9
Balance at September 30, 2020 | 21 | 21
Duke Energy Florida |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 14 | 7
Cumulative Change in Accounting Principle | 16 | 16
Write-Offs | 2 |
Credit Loss Expense |  | 8
Balance at September 30, 2020 | 16 | 16
Duke Energy Ohio |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 5 | 4
Cumulative Change in Accounting Principle | 5 | 4
Credit Loss Expense |  | 1
Balance at September 30, 2020 | 5 | 5
Duke Energy Indiana |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 3 | 3
Cumulative Change in Accounting Principle | 3 | 3
Balance at September 30, 2020 | 3 | 3
Piedmont Natural Gas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 | 6 | 6
Cumulative Change in Accounting Principle | 9 | 9
Write-Offs |  | (5)
Credit Loss Expense | 3 | 7
Balance at September 30, 2020 | $ 9 | 9
Cumulative Change in Accounting Principle |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 5
Cumulative Change in Accounting Principle |  | 5
Cumulative Change in Accounting Principle | Duke Energy Carolinas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 1
Cumulative Change in Accounting Principle |  | 1
Cumulative Change in Accounting Principle | Progress Energy |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 2
Cumulative Change in Accounting Principle |  | 2
Cumulative Change in Accounting Principle | Duke Energy Progress |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 1
Cumulative Change in Accounting Principle |  | 1
Cumulative Change in Accounting Principle | Duke Energy Florida |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 1
Cumulative Change in Accounting Principle |  | 1
Cumulative Change in Accounting Principle | Piedmont Natural Gas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at December 31, 2019 |  | 1
Cumulative Change in Accounting Principle |  | $ 1

X
- Definition Accounts Receivable, Allowance for Credit Loss, Other + References No definition available. + Details
Name: | duk_AccountsReceivableAllowanceforCreditLossOther
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Accounts Receivable, Allowance for Credit Loss, Writeoff (Recovery) + References No definition available. + Details
Name: | duk_AccountsReceivableAllowanceforCreditLossWriteoffRecovery
Namespace Prefix: | duk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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: |

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |