Balance Sheet Components Allowance for Uncollectible accounts activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance as of beginning of year	$ 26	$ 16	$ 5
Increase in provision	(2)	(35)	(15)
Amounts written off, less recoveries	(12)	(25)	(4)
Balance as of end of year	$ 12	$ 26	$ 16