XML 81 R39.htm IDEA: XBRL DOCUMENT
v3.19.2

Fair Value Measurements (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 10. See Note 11 for additional information related to investments by major security type for the Duke Energy Registrants.
| June 30, 2019
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |  | Not Categorized |
NDTF equity securities | $ | 5,178 |  | $ | 5,119 |  | $ | — |  | $ | — |  | $ | 59 |
NDTF debt securities | 2,425 |  | 870 |  | 1,555 |  | — |  | — |
Other equity securities | 112 |  | 112 |  | — |  | — |  | — |
Other debt securities | 315 |  | 99 |  | 216 |  | — |  | — |
Derivative assets | 38 |  | 3 |  | — |  | 35 |  | — |
Total assets | 8,068 |  | 6,203 |  | 1,771 |  | 35 |  | 59 |
Derivative liabilities | (342 | ) | (12 | ) | (216 | ) | (114 | ) | — |
Net assets (liabilities) | $ | 7,726 |  | $ | 6,191 |  | $ | 1,555 |  | $ | (79 | ) | $ | 59 |
| December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |  | Not Categorized |
NDTF equity securities | $ | 4,475 |  | $ | 4,410 |  | $ | — |  | $ | — |  | $ | 65 |
NDTF debt securities | 2,231 |  | 576 |  | 1,655 |  | — |  | — |
Other equity securities | 99 |  | 99 |  | — |  | — |  | — |
Other debt securities | 270 |  | 67 |  | 203 |  | — |  | — |
Derivative assets | 57 |  | 4 |  | 25 |  | 28 |  | — |
Total assets | 7,132 |  | 5,156 |  | 1,883 |  | 28 |  | 65 |
Derivative liabilities | (242 | ) | (11 | ) | (90 | ) | (141 | ) | — |
Net assets (liabilities) | $ | 6,890 |  | $ | 5,145 |  | $ | 1,793 |  | $ | (113 | ) | $ | 65 |
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs | The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
| Derivatives (net)
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Balance at beginning of period | $ | (115 | ) |  | $ | (124 | ) |  | $ | (113 | ) |  | $ | (114 | )
Purchases, sales, issuances and settlements: |  |  |  |  |  |  |
Purchases | 38 |  |  | 56 |  |  | 38 |  |  | 56 |
Settlements | (11 | ) |  | (15 | ) |  | (23 | ) |  | (29 | )
Total gains (losses) included on the Condensed Consolidated Balance Sheet | 9 |  |  | (14 | ) |  | 19 |  |  | (10 | )
Balance at end of period | $ | (79 | ) |  | $ | (97 | ) |  | $ | (79 | ) |  | $ | (97 | )
Quantitative Information Table - Level 3 | The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3.
| June 30, 2019
| Fair Value |  |  |  |  |
Investment Type | (in millions) | Valuation Technique | Unobservable Input | Range
Duke Energy Ohio |  |  |  |  |  |  |
FTRs | $ | 7 |  | RTO auction pricing | FTR price – per MWh | $ | 0.36 |  | - | $ | 3.13 |
Duke Energy Indiana |  |  |  |  |  |  |
FTRs | 28 |  | RTO auction pricing | FTR price – per MWh | (0.59 | ) | - | 7.61 |
Piedmont |  |  |  |  |  |
Natural gas contracts | (114 | ) | Discounted cash flow | Forward natural gas curves – price per MMBtu | 1.96 |  | - | 3.21 |
Duke Energy |  |  |  |  |  |
Total Level 3 derivatives | $ | (79 | ) |  |  |  |  |
| December 31, 2018
| Fair Value |  |  |  |  |
Investment Type | (in millions) | Valuation Technique | Unobservable Input | Range
Duke Energy Ohio |  |  |  |  |  |  |
FTRs | $ | 6 |  | RTO auction pricing | FTR price – per MWh | $ | 1.19 |  | - | $ | 4.59 |
Duke Energy Indiana |  |  |  |  |  |  |
FTRs | 22 |  | RTO auction pricing | FTR price – per MWh | (2.07 | ) | - | 8.27 |
Piedmont |  |  |  |  |  |
Natural gas contracts | (141 | ) | Discounted cash flow | Forward natural gas curves – price per MMBtu | 1.87 |  | - | 2.95 |
Duke Energy |  |  |  |  |  |
Total Level 3 derivatives | $ | (113 | ) |  |  |  |  |
Schedule Of Long Term Debt Fair Value | The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements.
| June 30, 2019 |  | December 31, 2018
(in millions) | Book Value |  |  | Fair Value |  |  | Book Value |  |  | Fair Value |
Duke Energy(a) | $ | 57,040 |  |  | $ | 60,667 |  |  | $ | 54,529 |  |  | $ | 54,534 |
Duke Energy Carolinas | 10,964 |  |  | 12,300 |  |  | 10,939 |  |  | 11,471 |
Progress Energy | 19,199 |  |  | 21,408 |  |  | 18,911 |  |  | 19,885 |
Duke Energy Progress | 9,049 |  |  | 9,707 |  |  | 8,204 |  |  | 8,300 |
Duke Energy Florida | 7,213 |  |  | 8,173 |  |  | 7,321 |  |  | 7,742 |
Duke Energy Ohio | 2,509 |  |  | 2,779 |  |  | 2,165 |  |  | 2,239 |
Duke Energy Indiana | 3,723 |  |  | 4,363 |  |  | 3,782 |  |  | 4,158 |
Piedmont | 2,384 |  |  | 2,576 |  |  | 2,138 |  |  | 2,180 |
(a) Book value of long-term debt includes $1.5 billion as of June 30, 2019, and $1.6 billion as of December 31, 2018, of unamortized debt discount and premium, net in purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt.
Duke Energy Carolinas [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  | Not Categorized |
NDTF equity securities | $ | 2,883 |  | $ | 2,824 |  | $ | — |  | $ | 59 |
NDTF debt securities | 1,161 |  | 250 |  | 911 |  | — |
Total assets | 4,044 |  | 3,074 |  | 911 |  | 59 |
Derivative liabilities | (93 | ) | — |  | (93 | ) | — |
Net assets | $ | 3,951 |  | $ | 3,074 |  | $ | 818 |  | $ | 59 |
| December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  | Not Categorized |
NDTF equity securities | $ | 2,484 |  | $ | 2,419 |  | $ | — |  | $ | 65 |
NDTF debt securities | 1,069 |  | 149 |  | 920 |  | — |
Derivative assets | 3 |  | — |  | 3 |  | — |
Total assets | 3,556 |  | 2,568 |  | 923 |  | 65 |
Derivative liabilities | (33 | ) | — |  | (33 | ) | — |
Net assets | $ | 3,523 |  | $ | 2,568 |  | $ | 890 |  | $ | 65 |
Progress Energy [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019 |  | December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  |  | Total Fair Value |  | Level 1 |  | Level 2 |
NDTF equity securities | $ | 2,295 |  | $ | 2,295 |  | $ | — |  |  | $ | 1,991 |  | $ | 1,991 |  | $ | — |
NDTF debt securities | 1,264 |  | 620 |  | 644 |  |  | 1,162 |  | 427 |  | 735 |
Other debt securities | 97 |  | 47 |  | 50 |  |  | 64 |  | 17 |  | 47 |
Derivative assets | — |  | — |  | — |  |  | 4 |  | — |  | 4 |
Total assets | 3,656 |  | 2,962 |  | 694 |  |  | 3,221 |  | 2,435 |  | 786 |
Derivative liabilities | (90 | ) | — |  | (90 | ) |  | (44 | ) | — |  | (44 | )
Net assets | $ | 3,566 |  | $ | 2,962 |  | $ | 604 |  |  | $ | 3,177 |  | $ | 2,435 |  | $ | 742 |
Duke Energy Progress [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019 |  | December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  |  | Total Fair Value |  | Level 1 |  | Level 2 |
NDTF equity securities | $ | 1,886 |  | $ | 1,886 |  | $ | — |  |  | $ | 1,588 |  | $ | 1,588 |  | $ | — |
NDTF debt securities | 948 |  | 304 |  | 644 |  |  | 906 |  | 294 |  | 612 |
Other debt securities | 2 |  | 2 |  | — |  |  | 6 |  | 6 |  | — |
Derivative assets | — |  | — |  | — |  |  | 4 |  | — |  | 4 |
Total assets | 2,836 |  | 2,192 |  | 644 |  |  | 2,504 |  | 1,888 |  | 616 |
Derivative liabilities | (35 | ) | — |  | (35 | ) |  | (27 | ) | — |  | (27 | )
Net assets | $ | 2,801 |  | $ | 2,192 |  | $ | 609 |  |  | $ | 2,477 |  | $ | 1,888 |  | $ | 589 |
Duke Energy Florida [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019 |  | December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  |  | Total Fair Value |  | Level 1 |  | Level 2 |
NDTF equity securities | $ | 409 |  | $ | 409 |  | $ | — |  |  | $ | 403 |  | $ | 403 |  | $ | — |
NDTF debt securities | 316 |  | 316 |  | — |  |  | 256 |  | 133 |  | 123 |
Other debt securities | 52 |  | 2 |  | 50 |  |  | 48 |  | 1 |  | 47 |
Total assets | 777 |  | 727 |  | 50 |  |  | 707 |  | 537 |  | 170 |
Derivative liabilities | (39 | ) | — |  | (39 | ) |  | (9 | ) | — |  | (9 | )
Net assets | $ | 738 |  | $ | 727 |  | $ | 11 |  |  | $ | 698 |  | $ | 537 |  | $ | 161 |
Duke Energy Ohio [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets were not material at June 30, 2019, and December 31, 2018.
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
Duke Energy Indiana [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019 |  | December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |  |  | Total Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Other equity securities | $ | 74 |  | $ | 74 |  | $ | — |  | $ | — |  |  | $ | 67 |  | $ | 67 |  | $ | — |  | $ | — |
Other debt securities | 42 |  | — |  | 42 |  | — |  |  | 41 |  | — |  | 41 |  | — |
Derivative assets | 29 |  | 1 |  | — |  | 28 |  |  | 23 |  | 1 |  | — |  | 22 |
Total assets | $ | 145 |  | $ | 75 |  | $ | 42 |  | $ | 28 |  |  | $ | 131 |  | $ | 68 |  | $ | 41 |  | $ | 22 |
Derivative liabilities | (2 | ) | (2 | ) | — |  | — |  |  | — |  | — |  | — |  | — |
Net assets | $ | 143 |  | $ | 73 |  | $ | 42 |  | $ | 28 |  |  | $ | 131 |  | $ | 68 |  | $ | 41 |  | $ | 22 |
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs | The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
| Derivatives (net)
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Balance at beginning of period | $ | 5 |  |  | $ | 7 |  |  | $ | 22 |  |  | $ | 27 |
Purchases, sales, issuances and settlements: |  |  |  |  |  |  |
Purchases | 29 |  |  | 49 |  |  | 29 |  |  | 49 |
Settlements | (9 | ) |  | (14 | ) |  | (19 | ) |  | (28 | )
Total gains (losses) included on the Condensed Consolidated Balance Sheet | 3 |  |  | 2 |  |  | (4 | ) |  | (4 | )
Balance at end of period | $ | 28 |  |  | $ | 44 |  |  | $ | 28 |  |  | $ | 44 |
Piedmont Natural Gas [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurement Amounts For Assets And Liabilities | The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
| June 30, 2019 |  | December 31, 2018
(in millions) | Total Fair Value |  | Level 1 |  | Level 3 |  |  | Total Fair Value |  | Level 1 |  | Level 3 |
Derivative assets | $ | 2 |  | $ | 2 |  | $ | — |  |  | $ | 3 |  | 3 |  | — |
Derivative liabilities | (114 | ) | — |  | (114 | ) |  | (141 | ) | — |  | (141 | )
Net (liabilities) assets | $ | (112 | ) | $ | 2 |  | $ | (114 | ) |  | $ | (138 | ) | $ | 3 |  | $ | (141 | )
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs | The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
| Derivatives (net)
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Balance at beginning of period | $ | (121 | ) |  | $ | (132 | ) |  | $ | (141 | ) |  | $ | (142 | )
Total gains (losses) and settlements | 7 |  |  | (18 | ) |  | 27 |  |  | (8 | )
Balance at end of period | $ | (114 | ) |  | $ | (150 | ) |  | $ | (114 | ) |  | $ | (150 | )

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

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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: |