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Balance Sheet Components (Tables)
 9 Months Ended
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,
 20222022
Balance as of beginning of period$23 $26 
Increase in provision2 6 
Amounts written off(4)(14)
Recoveries1 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, 2022December 31, 2021
Prepaid expenses$38 $66 
Assets from price risk management activities200 102 
Margin deposits45 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, 2022December 31, 2021
Electric utility plant$12,273 $11,838 
Construction work-in-progress376 313 
Total cost12,649 12,151 
Less: accumulated depreciation and amortization(4,357)(4,146)
Electric utility plant, net$8,292 $8,005 
Schedule of Regulatory Assets and Liabilities [Text Block]
Regulatory assets and liabilities consist of the following (in millions):
September 30, 2022December 31, 2021
CurrentNoncurrentCurrentNoncurrent
Regulatory assets:
Price risk management$— $— $— $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 — — 
Other13 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 management132 12 55 — 
Other28 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, 2022December 31, 2021
Accrued employee compensation and benefits$66 $67 
Accrued taxes payable65 46 
Accrued interest payable43 29 
Accrued dividends payable42 40 
Regulatory liabilities—current160 106 
Margin deposits from wholesale counterparties102 58 
Other96 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,
2022202120222021
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.