XML 76 R34.htm IDEA: XBRL DOCUMENT
v3.19.1

Asset Retirement Obligations (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
Asset Retirement Obligation [Abstract] |
Schedule of Asset Retirement Obligations | The following table presents the AROs recorded on the Condensed Consolidated Balance Sheets.
| March 31, 2019
|  |  | Duke |  |  |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  |
| Duke |  |  | Energy |  |  | Progress |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  |
(in millions) | Energy |  |  | Carolinas |  |  | Energy |  |  | Progress |  |  | Florida |  |  | Ohio |  |  | Indiana |  |  | Piedmont |
Decommissioning of nuclear power facilities(a) | $ | 5,753 |  |  | $ | 2,368 |  |  | $ | 3,239 |  |  | $ | 2,709 |  |  | $ | 530 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Closure of ash impoundments | 6,961 |  |  | 3,013 |  |  | 3,197 |  |  | 3,177 |  |  | 20 |  |  | 52 |  |  | 699 |  |  | — |
Other | 321 |  |  | 47 |  |  | 70 |  |  | 37 |  |  | 33 |  |  | 41 |  |  | 20 |  |  | 19 |
Total ARO | $ | 13,035 |  |  | $ | 5,428 |  |  | $ | 6,506 |  |  | $ | 5,923 |  |  | $ | 583 |  |  | $ | 93 |  |  | $ | 719 |  |  | $ | 19 |
Less: current portion | 779 |  |  | 209 |  |  | 456 |  |  | 452 |  |  | 4 |  |  | 6 |  |  | 108 |  |  | — |
Total noncurrent ARO | $ | 12,256 |  |  | $ | 5,219 |  |  | $ | 6,050 |  |  | $ | 5,471 |  |  | $ | 579 |  |  | $ | 87 |  |  | $ | 611 |  |  | $ | 19 |
(a) Duke Energy amount includes purchase accounting adjustments related to the merger with Progress Energy.
Schedule of Change in Asset Retirement Obligation | The following table presents the change in liability associated with AROs for the Duke Energy Registrants.
|  |  | Duke |  |  |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  |
| Duke |  |  | Energy |  |  | Progress |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  |
(in millions) | Energy |  |  | Carolinas |  |  | Energy |  |  | Progress |  |  | Florida |  |  | Ohio |  |  | Indiana |  |  | Piedmont |
Balance at December 31, 2018(a) | $ | 10,467 |  |  | $ | 3,949 |  |  | $ | 5,411 |  |  | $ | 4,820 |  |  | $ | 591 |  |  | $ | 93 |  |  | $ | 722 |  |  | $ | 19 |
Accretion expense(b) | 110 |  |  | 48 |  |  | 57 |  |  | 50 |  |  | 7 |  |  | 1 |  |  | 7 |  |  | — |
Liabilities settled(c) | (184 | ) |  | (76 | ) |  | (97 | ) |  | (82 | ) |  | (15 | ) |  | (1 | ) |  | (10 | ) |  | — |
Revisions in estimates of cash flows(d) | 2,642 |  |  | 1,507 |  |  | 1,135 |  |  | 1,135 |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at March 31, 2019 | $ | 13,035 |  |  | $ | 5,428 |  |  | $ | 6,506 |  |  | $ | 5,923 |  |  | $ | 583 |  |  | $ | 93 |  |  | $ | 719 |  |  | $ | 19 |
(a) | Primarily relates to decommissioning nuclear power facilities, closure of ash impoundments, asbestos removal, closure of landfills at fossil generation facilities, retirement of natural gas mains and removal of renewable energy generation assets.
(b) | For the three months ended March 31, 2019, substantially all accretion expense relates to Duke Energy's regulated operations and has been deferred in accordance with regulatory accounting treatment.
(c) | Primarily relates to ash impoundment closures.
(d) | Relates to increases in closure estimates for certain ash impoundments as a result of the NCDEQ's determination that all ash basins must be excavated. See Note 4 for more information. The incremental amount recorded represents the discounted cash flows for estimated closure costs based upon the probability weightings of the potential closure methods as evaluated on a site-by-site basis.
Public Utilities General Disclosures |
(in millions) | March 31, 2019 |  | December 31, 2018
Duke Energy | $ | 6,102 |  |  | $ | 5,579 |
Duke Energy Carolinas | 3,443 |  |  | 3,133 |
Duke Energy Progress | 2,659 |  |  | 2,446 |

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

X
- Definition Tabular disclosure of regulation for public utility entities, including, but not limited to, rate requests, decommissioning costs and the amount of allowance for earnings on equity capitalized for rate making purposes. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration