Balance Sheet Components Allowance for Uncollectible accounts activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance as of beginning of year	$ 12	$ 26	$ 16
Increase in provision	5	2	35
Amounts written off, less recoveries	(8)	(12)	(25)
Balance as of end of year	$ 9	$ 12	$ 26