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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. + Details
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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 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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