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Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation, Revision of Estimate	$ 9	$ 36	$ (14)
Asset Retirement Obligation, Accretion Expense	11	10	10
Asset Retirement Obligation, Liabilities Incurred	$ 2	1	0
Document Period End Date	Dec. 31, 2023
Decommissioning Liability, Noncurrent	$ 7
Asset Retirement Obligation, Liabilities Settled	12
Asset Retirement Obligation, Cash Paid to Settle	25	27	$ 18
Recorded Third-Party Environmental Recoveries, Amount	$ 9	$ 6
Asset Retirement Obligations, Significant Changes	7 million
Utility Plant [Domain]
Asset Retirement Obligation, Accretion Expense	$ 4
Asset Retirement Obligation, Period Increase (Decrease)	$ 1

X

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481879/410-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481879/410-20-45-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of asset retirement obligations incurred during the period.

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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
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- Definition

Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
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Amount of increase (decrease) in asset retirement obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
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Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
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Description of the significant increases or decreases in the carrying amount of the asset retirement obligation during the period, such as changes in significant assumptions used to calculate the carrying amount of the asset retirement obligation.

+ References

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Amount of a decommissioning liability associated with a legal obligation that a firm incurs when it constructs or operates an asset that must eventually be withdrawn from active service. This may include operating assets such as nuclear power plants or shipping vessels.

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Recorded amount of the individual components comprising the asset for third-party recoveries related to environmental remediation obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
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