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Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2023
Asset Retirement Obligations [Abstract]
Change in Asset Retirement Obligations	The change in ARO for the years ended December 31 is as follows: millions of dollars 2023 2022 Balance, January 1 $ 174 $ 174 Accretion included in depreciation expense 9 9 Change in FX rate (1) 3 Additions - 1 Accretion deferred to regulatory asset (included in PP&E) 18 1 Liabilities settled (8) (1) Revisions in estimated cash flows - (13) Balance, December 31 $ 192 $ 174

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- References

No definition available.

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- 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
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481850/410-20-50-1

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