XML 154 R54.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of asset retirement obligations | The components of the change in our asset retirement obligations are shown below:
|  | Years Ended December 31,
|  | 2019 |  | 2018
|  | ($ in millions)
Asset retirement obligations, beginning of period |  | $ | 166 |  |  | $ | 177 |
Additions(a) |  | 21 |  |  | 3 |
Revisions |  | 18 |  |  | 11 |
Settlements and disposals |  | (5 | ) |  | (35 | )
Accretion expense |  | 11 |  |  | 10 |
Asset retirement obligations, end of period |  | 211 |  |  | 166 |
Less current portion |  | 11 |  |  | 11 |
Asset retirement obligation, long-term |  | $ | 200 |  |  | $ | 155 |
___________________________________________ (a) During 2019, approximately $17 million of additions relate to the acquisition of WildHorse.

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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