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Asset Retirement Obligations (Tables) | 9 Months Ended
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Sep. 30, 2019
Asset Retirement Obligation Disclosure [Abstract] |
Changes to Asset Retirement Obligations | The changes to AROs during 2019 were as follows:
| Amount |
(millions) |  |  |  |
Dominion Energy |  |  |  |
AROs at December 31, 2018(1) | $ |  | 2,532 |
Obligations incurred during the period(2) |  |  | 2,404 |
Obligations settled during the period |  |  | (100 | )
AROs acquired in the SCANA Combination |  | 577 |
Revisions in estimated cash flows(2) |  |  | (229 | )
Accretion |  | 153 |
AROs at September 30, 2019(1) | $ |  | 5,337 |
Virginia Power |  |  |  |
AROs at December 31, 2018(3) | $ |  | 1,445 |
Obligations incurred during the period(2) |  |  | 2,403 |
Obligations settled during the period |  |  | (60 | )
Revisions in estimated cash flows(2) |  |  | (202 | )
Accretion |  | 94 |
AROs at September 30, 2019(3) | $ |  | 3,680 |
Dominion Energy Gas |  |  |  |
AROs at December 31, 2018(4) | $ | 167 |
Obligations settled during the period |  |  | (6 | )
Revisions in estimated cash flows |  |  | (26 | )
Accretion |  | 7 |
AROs at September 30, 2019(4) | $ | 142 |
(1) | Includes $282 million and $317 million reported in other current liabilities at December 31, 2018 and September 30, 2019, respectively.
(2) | Primarily related to future ash pond and landfill closure costs at certain utility generation facilities. See Note 18 for further information.
(3) | Includes $245 million and $262 million reported in other current liabilities at December 31, 2018 and September 30, 2019, respectively.
(4) | Includes $153 million and $134 million reported in other deferred credits and other liabilities, with the remainder recorded in other current liabilities, at December 31, 2018 and September 30, 2019, respectively.

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- 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
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