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Employee Benefit Plans (Marketable Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Retirement Benefits [Abstract]
Marketable securities held in trusts	$ 713	$ 786

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- References

No definition available.

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- Definition

Amount of investment in marketable security, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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