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Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2022

Asset Retirement Obligation Disclosure [Abstract]

Asset retirement obligations

			Asset Retirement Obligations
(Dollars in millions)
Balance at December 31, 2021			$	469
Additional liabilities accrued			19
Revisions in estimated cash outflows			12
Disposition of assets			(1)
Accretion expense			19
Balance at September 30, 2022			$	518

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- References

No definition available.

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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://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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