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Balance Sheet Components Pension and Other Postretirement Benefits (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 5	$ 5
Interest cost	8	8	16	17
Expected return on plan assets	(9)	(10)	(18)	(20)
Net periodic benefit cost	$ 2	$ 1	$ 3	$ 2

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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