XML 145 R88.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies (Future Minimum Payments for Operating and Capital Leases) (Details) - USD ($) $ in Millions | 2 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 31, 2016
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | $ 268 | $ 241 | $ 242 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 239 |  |  |
2020 |  | 219 |  |  |
2021 |  | 186 |  |  |
2022 |  | 170 |  |  |
2023 |  | 160 |  |  |
Thereafter |  | 1,017 |  |  |
Total future minimum lease payments |  | 1,991 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 170 |  |  |
2020 |  | 174 |  |  |
2021 |  | 177 |  |  |
2022 |  | 165 |  |  |
2023 |  | 165 |  |  |
Thereafter |  | 577 |  |  |
Minimum annual payments |  | 1,428 |  |  |
Less amount representing interest |  | (487) |  |  |
Total |  | 941 |  |  |
Duke Energy Carolinas [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 49 | 44 | 45 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 33 |  |  |
2020 |  | 29 |  |  |
2021 |  | 19 |  |  |
2022 |  | 19 |  |  |
2023 |  | 17 |  |  |
Thereafter |  | 68 |  |  |
Total future minimum lease payments |  | 185 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 20 |  |  |
2020 |  | 20 |  |  |
2021 |  | 15 |  |  |
2022 |  | 15 |  |  |
2023 |  | 15 |  |  |
Thereafter |  | 204 |  |  |
Minimum annual payments |  | 289 |  |  |
Less amount representing interest |  | (180) |  |  |
Total |  | 109 |  |  |
Progress Energy [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 143 | 130 | 140 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 97 |  |  |
2020 |  | 90 |  |  |
2021 |  | 79 |  |  |
2022 |  | 76 |  |  |
2023 |  | 77 |  |  |
Thereafter |  | 455 |  |  |
Total future minimum lease payments |  | 874 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 45 |  |  |
2020 |  | 46 |  |  |
2021 |  | 45 |  |  |
2022 |  | 45 |  |  |
2023 |  | 45 |  |  |
Thereafter |  | 230 |  |  |
Minimum annual payments |  | 456 |  |  |
Less amount representing interest |  | (205) |  |  |
Total |  | 251 |  |  |
Duke Energy Progress [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 75 | 75 | 68 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 49 |  |  |
2020 |  | 46 |  |  |
2021 |  | 37 |  |  |
2022 |  | 34 |  |  |
2023 |  | 35 |  |  |
Thereafter |  | 314 |  |  |
Total future minimum lease payments |  | 515 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 20 |  |  |
2020 |  | 21 |  |  |
2021 |  | 20 |  |  |
2022 |  | 21 |  |  |
2023 |  | 21 |  |  |
Thereafter |  | 209 |  |  |
Minimum annual payments |  | 312 |  |  |
Less amount representing interest |  | (175) |  |  |
Total |  | 137 |  |  |
Duke Energy Florida [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 68 | 55 | 72 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 48 |  |  |
2020 |  | 44 |  |  |
2021 |  | 42 |  |  |
2022 |  | 42 |  |  |
2023 |  | 42 |  |  |
Thereafter |  | 141 |  |  |
Total future minimum lease payments |  | 359 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 25 |  |  |
2020 |  | 25 |  |  |
2021 |  | 25 |  |  |
2022 |  | 24 |  |  |
2023 |  | 24 |  |  |
Thereafter |  | 21 |  |  |
Minimum annual payments |  | 144 |  |  |
Less amount representing interest |  | (30) |  |  |
Total |  | 114 |  |  |
Duke Energy Ohio [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 13 | 15 | 16 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 2 |  |  |
2020 |  | 2 |  |  |
2021 |  | 2 |  |  |
2022 |  | 2 |  |  |
2023 |  | 2 |  |  |
Thereafter |  | 23 |  |  |
Total future minimum lease payments |  | 33 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 2 |  |  |
Minimum annual payments |  | 2 |  |  |
Total |  | 2 |  |  |
Duke Energy Indiana [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases |  | 21 | 23 | $ 23 |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 6 |  |  |
2020 |  | 5 |  |  |
2021 |  | 4 |  |  |
2022 |  | 4 |  |  |
2023 |  | 5 |  |  |
Thereafter |  | 66 |  |  |
Total future minimum lease payments |  | 90 |  |  |
Capital Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 1 |  |  |
2020 |  | 1 |  |  |
2021 |  | 1 |  |  |
2022 |  | 1 |  |  |
2023 |  | 1 |  |  |
Thereafter |  | 27 |  |  |
Minimum annual payments |  | 32 |  |  |
Less amount representing interest |  | (22) |  |  |
Total |  | 10 |  |  |
Piedmont Natural Gas [Member] |  |  |  |  |
Operating Leased Assets |  |  |  |  |
Rental expense on operating leases | $ 1 | 11 | $ 7 |  | $ 5
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |
2019 |  | 5 |  |  |
2020 |  | 5 |  |  |
2021 |  | 5 |  |  |
2022 |  | 5 |  |  |
2023 |  | 6 |  |  |
Thereafter |  | 11 |  |  |
Total future minimum lease payments |  | $ 37 |  |  |

X
- Definition Amount of minimum lease payments for capital leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
Name: | us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
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: |