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Balance Sheet Components Allowance for Uncollectible accounts activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance as of beginning of year	$ 9	$ 12	$ 26
Increase in provision	11	5	(2)
Amounts written off, less recoveries	(8)	(8)	(12)
Balance as of end of year	12	$ 9	$ 12
reductioninprovisionoffsetinregulatoryassets	$ 10

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- Definition

Reduction in provision off set in regulatory assets due to Covid-19 deferral accounting.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
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-Name Accounting Standards Codification
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- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

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-Topic 210
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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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