XML 28 R18.htm IDEA: XBRL DOCUMENT
v3.21.2

Balance Sheet Components (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
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, |  |  |  |  |  |
| 2021 |  | 2021 |  |  |  |  |  |
Balance as of beginning of period | $ | 22 |  |  | $ | 16 |  |  |  |  |  |  |
Increase in provision | 11 |  |  | 26 |  |  |  |  |  |  |
Amounts written off | (7) |  |  | (19) |  |  |  |  |  |  |
Recoveries | 1 |  |  | 4 |  |  |  |  |  |  |
Balance as of end of period | $ | 27 |  |  | $ | 27 |  |  |  |  |  |  |
Schedule of Other Current Assets [Table Text Block] | Other current assets consist of the following (in millions):
| September 30, 2021 |  | December 31, 2020
Prepaid expenses | $ | 44 |  |  | $ | 57 |
Assets from price risk management activities | 194 |  |  | 33 |
Margin deposits | 5 |  |  | 8 |
Other current assets | $ | 243 |  |  | $ | 98 |
Schedule of Public Utility Property, Plant, and Equipment [Table Text Block] | Electric utility plant, net consists of the following (in millions):
| September 30, 2021 |  | December 31, 2020
Electric utility plant | $ | 11,334 |  |  | $ | 10,974 |
Construction work-in-progress | 503 |  |  | 429 |
Total cost | 11,837 |  |  | 11,403 |
Less: accumulated depreciation and amortization | (4,064) |  |  | (3,864) |
Electric utility plant, net | $ | 7,773 |  |  | $ | 7,539 |
Schedule of Regulatory Assets and Liabilities [Text Block] | Regulatory assets and liabilities consist of the following (in millions):
| September 30, 2021 |  | December 31, 2020
| Current |  | Noncurrent |  | Current |  | Noncurrent
Regulatory assets: |  |  |  |  |  |  |
Price risk management | $ | — |  |  | $ | 11 |  |  | $ | — |  |  | $ | 124 |
Pension and other postretirement plans | — |  |  | 223 |  |  | — |  |  | 240 |
Debt issuance costs | — |  |  | 24 |  |  | — |  |  | 25 |
Trojan decommissioning activities | — |  |  | 99 |  |  | — |  |  | 95 |
Incremental storm costs | — |  |  | 58 |  |  | — |  |  | — |
Power cost adjustment mechanism | — |  |  | 27 |  |  | — |  |  | — |
Wildfire | — |  |  | 36 |  |  | — |  |  | 15 |
COVID-19 | — |  |  | 27 |  |  | — |  |  | 10 |
Other | 14 |  |  | 62 |  |  | 23 |  |  | 60 |
Total regulatory assets | $ | 14 |  |  | $ | 567 |  |  | $ | 23 |  |  | $ | 569 |
Regulatory liabilities: |  |  |  |  |  |  |
Asset retirement removal costs | $ | — |  |  | $ | 1,035 |  |  | $ | — |  |  | $ | 1,016 |
Deferred income taxes | — |  |  | 213 |  |  | — |  |  | 239 |
Asset retirement obligations | — |  |  | 54 |  |  | — |  |  | 37 |
Price risk management | 155 |  |  | — |  |  | 18 |  |  | — |
Other | 32 |  |  | 68 |  |  | 5 |  |  | 77 |
Total regulatory liabilities | $ | 187 |  | * | $ | 1,370 |  |  | $ | 23 |  | * | $ | 1,369 |
* 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, 2021 |  | December 31, 2020
Accrued employee compensation and benefits | $ | 65 |  |  | $ | 67 |
Accrued taxes payable | 58 |  |  | 36 |
Accrued interest payable | 42 |  |  | 29 |
Accrued dividends payable | 40 |  |  | 38 |
Regulatory liabilities—current | 187 |  |  | 23 |
Margin deposits from wholesale counterparties | 102 |  |  | — |
Other | 117 |  |  | 129 |
Total accrued expenses and other current liabilities | $ | 611 |  |  | $ | 322 |
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,
| 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 5 |  |  | $ | 4 |  |  | $ | 15 |  |  | $ | 12 |
Interest cost* | 6 |  |  | 8 |  |  | 20 |  |  | 24 |
Expected return on plan assets* | (12) |  |  | (11) |  |  | (34) |  |  | (33) |
Amortization of net actuarial loss* | 6 |  |  | 4 |  |  | 16 |  |  | 12 |
Net periodic benefit cost | $ | 5 |  |  | $ | 5 |  |  | $ | 17 |  |  | $ | 15 |
* 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.

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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -URI http://asc.fasb.org/topic&trid=2196771 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section S99 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (o) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (p) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(03) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (q) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (r)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (r)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + 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, deprecation expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167750&loc=d3e42232-110370 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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