XML 30 R20.htm IDEA: XBRL DOCUMENT
v3.24.3

Balance Sheet Components (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2024
Balance Sheet Components [Abstract] |
Allowance for Credit Losses [Text Block] | The following summarizes activity during 2024 in the allowance for credit losses (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
Balance as of beginning of period | $ | 11 |  |  | $ | 9 |
Increase in provision | 3 |  |  | 8 |
Amounts written off | (5) |  |  | (11) |
Recoveries | 2 |  |  | 5 |
Balance as of end of period | $ | 11 |  |  | $ | 11 |
Schedule of Other Current Assets [Table Text Block] | Other current assets consist of the following (in millions):
| September 30, 2024 |  | December 31, 2023
Prepaid expenses | $ | 45 |  |  | $ | 68 |
Assets from price risk management activities | 20 |  |  | 22 |
Margin deposits | 91 |  |  | 92 |
Other current assets | $ | 156 |  |  | $ | 182 |
Schedule of Public Utility Property, Plant, and Equipment [Table Text Block] | Electric utility plant, net consists of the following (in millions):
| September 30, 2024 |  | December 31, 2023
Electric utility plant in-service | $ | 14,253 |  |  | $ | 13,329 |
Construction work-in-progress | 803 |  |  | 974 |
Total cost | 15,056 |  |  | 14,303 |
Less: accumulated depreciation and amortization | (4,981) |  |  | (4,757) |
Electric utility plant, net | $ | 10,075 |  |  | $ | 9,546 |
Schedule of Regulatory Assets and Liabilities [Text Block] | Regulatory assets and liabilities consist of the following (in millions):
| September 30, 2024 |  | December 31, 2023
| Current |  | Noncurrent |  | Current |  | Noncurrent
Regulatory assets: |  |  |  |  |  |  |
Price risk management | $ | 94 |  |  | $ | 73 |  |  | $ | 143 |  |  | $ | 63 |
Pension and other postretirement plans | — |  |  | 104 |  |  | — |  |  | 104 |
Trojan decommissioning activities | — |  |  | 142 |  |  | — |  |  | 139 |
February 2021 ice storm and damage | 13 |  |  | 48 |  |  | 12 |  |  | 55 |
January 2024 storm and damage | — |  |  | 28 |  |  | — |  |  | — |
Reliability contingency events | — |  |  | 89 |  |  | — |  |  | — |
2020 Labor Day wildfire | 5 |  |  | 20 |  |  | 5 |  |  | 23 |
Wildfire mitigation | 41 |  |  | — |  |  | 19 |  |  | 10 |
Other | 32 |  |  | 115 |  |  | 42 |  |  | 98 |
Total regulatory assets | $ | 185 |  |  | $ | 619 |  |  | $ | 221 |  |  | $ | 492 |
Regulatory liabilities: |  |  |  |  |  |  |
Asset retirement removal costs | $ | — |  |  | $ | 1,193 |  |  | $ | — |  |  | $ | 1,173 |
Deferred income taxes | — |  |  | 164 |  |  | — |  |  | 177 |
Clearwater RAC | — |  |  | 26 |  |  | — |  |  | — |
Other | 55 |  |  | 30 |  |  | 48 |  |  | 48 |
Total regulatory liabilities | $ | 55 |  | * | $ | 1,413 |  |  | $ | 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):
| September 30, 2024 |  | December 31, 2023
Accrued employee compensation and benefits | $ | 75 |  |  | $ | 74 |
Accrued taxes payable | 56 |  |  | 30 |
Accrued interest payable | 54 |  |  | 40 |
Accrued dividends payable | 54 |  |  | 51 |
Regulatory liabilities—current | 55 |  |  | 48 |
Other | 107 |  |  | 112 |
Total accrued expenses and other current liabilities | $ | 401 |  |  | $ | 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 September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Service cost | $ | 3 |  |  | $ | 3 |  |  | $ | 8 |  |  | $ | 9 |
Interest cost* | 8 |  |  | 9 |  |  | 25 |  |  | 27 |
Expected return on plan assets* | (10) |  |  | (11) |  |  | (30) |  |  | (33) |
Net periodic benefit cost | $ | 1 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 3 |
* 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.

X
- Definition Balance Sheet Components [Abstract] + References No definition available. + Details
Name: | por_BalanceSheetComponentsAbstract
Namespace Prefix: | por_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -Publisher FASB -URI https://asc.fasb.org/310/tableOfContent + Details
Name: | us-gaap_AllowanceForCreditLossesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for other liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 405 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/405/tableOfContent + Details
Name: | us-gaap_OtherLiabilitiesDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for retirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/715/tableOfContent Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (o) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (p) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (r)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (r)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480126/715-20-S99-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-3 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation expense and method used, including composite depreciation, and accumulated depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 20 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481834/980-20-45-1 + Details
Name: | us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration