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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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 5	$ 6
Interest cost	8	9	17	18
Expected return on plan assets	(10)	(11)	(20)	(22)
Net periodic benefit cost	$ 1	$ 1	$ 2	$ 2

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