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Severance (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) employee	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Restructuring and Related Activities [Abstract]
Severance expense | $	$ (8)	$ (28)	$ 102
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]			Operation, maintenance and other
Number of employees | employee	682

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- References

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- Definition

The number of positions eliminated during the period as a result of restructuring activities.

+ References

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- Definition

Indicates line item in statement of income or comprehensive income that includes restructuring charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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