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Balance Sheet Components (Tables) | 3 Months Ended
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Mar. 31, 2024
Balance Sheet Components [Abstract] |
Allowance for Credit Losses [Text Block] | The following summarizes activity in the allowance for credit losses (in millions):
| Three Months Ended March 31, |  |
| 2024 |  |
Balance as of beginning of period | $ | 9 |  |  |
Increase in provision | 3 |  |  |
Amounts written off | (3) |  |  |
Recoveries | 2 |  |  |
Balance as of end of period | $ | 11 |  |  |
Schedule of Other Current Assets [Table Text Block] | Other current assets consist of the following (in millions):
| March 31, 2024 |  | December 31, 2023
Prepaid expenses | $ | 109 |  |  | $ | 68 |
Assets from price risk management activities | 29 |  |  | 22 |
Margin deposits | 65 |  |  | 92 |
Other current assets | $ | 203 |  |  | $ | 182 |
Schedule of Public Utility Property, Plant, and Equipment [Table Text Block] | Electric utility plant, net consists of the following (in millions):
| March 31, 2024 |  | December 31, 2023
Electric utility plant in-service | $ | 13,881 |  |  | $ | 13,329 |
Construction work-in-progress | 628 |  |  | 974 |
Total cost | 14,509 |  |  | 14,303 |
Less: accumulated depreciation and amortization | (4,846) |  |  | (4,757) |
Electric utility plant, net | $ | 9,663 |  |  | $ | 9,546 |
Schedule of Regulatory Assets and Liabilities [Text Block] | Regulatory assets and liabilities consist of the following (in millions):
| March 31, 2024 |  | December 31, 2023
| Current |  | Noncurrent |  | Current |  | Noncurrent
Regulatory assets: |  |  |  |  |  |  |
Price risk management | $ | 108 |  |  | $ | 48 |  |  | $ | 143 |  |  | $ | 63 |
Reliability contingency events | — |  |  | 75 |  |  | — |  |  | — |
Pension and other postretirement plans | — |  |  | 104 |  |  | — |  |  | 104 |
Trojan decommissioning activities | — |  |  | 141 |  |  | — |  |  | 139 |
February 2021 ice storm and damage | 12 |  |  | 53 |  |  | 12 |  |  | 55 |
January 2024 storm and damage | — |  |  | 48 |  |  | — |  |  | — |
2020 Labor Day wildfire | 5 |  |  | 22 |  |  | 5 |  |  | 23 |
Wildfire mitigation | 19 |  |  | 13 |  |  | 19 |  |  | 10 |
Other | 33 |  |  | 102 |  |  | 42 |  |  | 98 |
Total regulatory assets | $ | 177 |  |  | $ | 606 |  |  | $ | 221 |  |  | $ | 492 |
Regulatory liabilities: |  |  |  |  |  |  |
Asset retirement removal costs | $ | — |  |  | $ | 1,178 |  |  | $ | — |  |  | $ | 1,173 |
Deferred income taxes | — |  |  | 171 |  |  | — |  |  | 177 |
Clearwater RAC | — |  |  | 10 |  |  | — |  |  | — |
Other | 50 |  |  | 47 |  |  | 48 |  |  | 48 |
Total regulatory liabilities | $ | 50 |  | * | $ | 1,406 |  |  | $ | 48 |  | * | $ | 1,398 |
* Included in Accrued expenses and other current liabilities in the condensed consolidated balance sheets.
Other Liabilities Disclosure [Text Block] | Accrued expenses and other current liabilities consist of the following (in millions):
| March 31, 2024 |  | December 31, 2023
Accrued employee compensation and benefits | $ | 50 |  |  | $ | 74 |
Accrued taxes payable | 29 |  |  | 30 |
Accrued interest payable | 58 |  |  | 40 |
Accrued dividends payable | 50 |  |  | 51 |
Regulatory liabilities—current | 50 |  |  | 48 |
Margin deposits from wholesale counterparties | 5 |  |  | 5 |
Other | 114 |  |  | 107 |
Total accrued expenses and other current liabilities | $ | 356 |  |  | $ | 355 |
Pension and Other Postretirement Benefits Disclosure [Text Block] | Components of net periodic benefit cost under the defined benefit pension plan are as follows (in millions):
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
Service cost |  |  |  |  | $ | 3 |  |  | $ | 3 |
Interest cost* |  |  |  |  | 8 |  |  | 9 |
Expected return on plan assets* |  |  |  |  | (10) |  |  | (11) |
Net periodic benefit cost |  |  |  |  | $ | 1 |  |  | $ | 1 |
* The net expense portion of non-service cost components are included in Miscellaneous income, net within Other income on the Company’s condensed consolidated statements of income and comprehensive income.

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