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Balance Sheet Components (Tables) | 9 Months Ended
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Sep. 30, 2022
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 September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2022
Balance as of beginning of period | $ | 23 |  |  | $ | 26 |
Increase in provision | 2 |  |  | 6 |
Amounts written off | (4) |  |  | (14) |
Recoveries | 1 |  |  | 4 |
Balance as of end of period | $ | 22 |  |  | $ | 22 |
Schedule of Other Current Assets [Table Text Block] | Other current assets consist of the following (in millions):
| September 30, 2022 |  | December 31, 2021
Prepaid expenses | $ | 38 |  |  | $ | 66 |
Assets from price risk management activities | 200 |  |  | 102 |
Margin deposits | 45 |  |  | 37 |
Other current assets | $ | 283 |  |  | $ | 205 |
Schedule of Public Utility Property, Plant, and Equipment [Table Text Block] | Electric utility plant, net consists of the following (in millions):
| September 30, 2022 |  | December 31, 2021
Electric utility plant | $ | 12,273 |  |  | $ | 11,838 |
Construction work-in-progress | 376 |  |  | 313 |
Total cost | 12,649 |  |  | 12,151 |
Less: accumulated depreciation and amortization | (4,357) |  |  | (4,146) |
Electric utility plant, net | $ | 8,292 |  |  | $ | 8,005 |
Schedule of Regulatory Assets and Liabilities [Text Block] | Regulatory assets and liabilities consist of the following (in millions):
| September 30, 2022 |  | December 31, 2021
| Current |  | Noncurrent |  | Current |  | Noncurrent
Regulatory assets: |  |  |  |  |  |  |
Price risk management | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 55 |
Pension and other postretirement plans | — |  |  | 121 |  |  | — |  |  | 131 |
Debt issuance costs | — |  |  | 22 |  |  | — |  |  | 23 |
Trojan decommissioning activities | — |  |  | 101 |  |  | — |  |  | 90 |
February 2021 ice storm and damage | — |  |  | 73 |  |  | — |  |  | 67 |
Power cost adjustment mechanism | — |  |  | 30 |  |  | — |  |  | 29 |
2020 Labor Day wildfire | — |  |  | 31 |  |  | — |  |  | 45 |
COVID-19 | — |  |  | 34 |  |  | — |  |  | 36 |
Wildfire mitigation | — |  |  | 25 |  |  | — |  |  | — |
Other | 13 |  |  | 69 |  |  | 24 |  |  | 57 |
Total regulatory assets | $ | 13 |  |  | $ | 506 |  |  | $ | 24 |  |  | $ | 533 |
Regulatory liabilities: |  |  |  |  |  |  |
Asset retirement removal costs | $ | — |  |  | $ | 1,130 |  |  | $ | — |  |  | $ | 1,047 |
Deferred income taxes | — |  |  | 198 |  |  | — |  |  | 208 |
Asset retirement obligations | — |  |  | 6 |  |  | — |  |  | 43 |
Price risk management | 132 |  |  | 12 |  |  | 55 |  |  | — |
Other | 28 |  |  | 56 |  |  | 51 |  |  | 62 |
Total regulatory liabilities | $ | 160 |  | * | $ | 1,402 |  |  | $ | 106 |  | * | $ | 1,360 |
* 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):
| September 30, 2022 |  | December 31, 2021
Accrued employee compensation and benefits | $ | 66 |  |  | $ | 67 |
Accrued taxes payable | 65 |  |  | 46 |
Accrued interest payable | 43 |  |  | 29 |
Accrued dividends payable | 42 |  |  | 40 |
Regulatory liabilities—current | 160 |  |  | 106 |
Margin deposits from wholesale counterparties | 102 |  |  | 58 |
Other | 96 |  |  | 111 |
Total accrued expenses and other current liabilities | $ | 574 |  |  | $ | 457 |
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 September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Service cost | $ | 4 |  |  | $ | 5 |  |  | $ | 12 |  |  | $ | 15 |
Interest cost* | 7 |  |  | 6 |  |  | 21 |  |  | 20 |
Expected return on plan assets* | (12) |  |  | (12) |  |  | (36) |  |  | (34) |
Amortization of net actuarial loss* | 4 |  |  | 6 |  |  | 12 |  |  | 16 |
Net periodic benefit cost | $ | 3 |  |  | $ | 5 |  |  | $ | 9 |  |  | $ | 17 |
* The net expense portion of non-service cost components are included in Miscellaneous income (expense), net within Other income on the Company’s condensed consolidated statements of income and comprehensive income. PGE sponsors a health and welfare plan, under which it offers medical and life insurance benefits, as well as health reimbursement arrangements. Retirees who participate in the Company’s postretirement health insurance plans are eligible for a Defined Dollar Medical Benefit, which limits PGE’s obligation pursuant to the postretirement health plan by establishing a maximum benefit per employee with employees responsible for the additional cost. In the third quarter of 2022, PGE executed a buyout of the Non-represented Retiree Medical Plan, resulting in a $11 million settlement gain, which has been recorded in Miscellaneous income, net on the condensed consolidated statement of income and comprehensive income.

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