XML 74 R40.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Balance Sheet Components (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Balance Sheet Components [Abstract] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | The following is the activity in the allowance for uncollectible accounts (in millions):
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Balance as of beginning of year | $ | 15 |  |  | $ | 6 |  |  | $ | 6 |
Increase in provision | 2 |  |  | 14 |  |  | 6 |
Amounts written off, less recoveries | (12 | ) |  | (5 | ) |  | (6 | )
Balance as of end of year | $ | 5 |  |  | $ | 15 |  |  | $ | 6 |
Schedule of Other Assets and Other Liabilities [Table Text Block] | Other current assets and Accrued expenses and other current liabilities consist of the following (in millions):
| As of December 31,
| 2019 |  | 2018
Other current assets: |  |  |
Prepaid expenses | $ | 63 |  |  | $ | 54 |
Margin deposits | 16 |  |  | 16 |
Assets from price risk management activities | 25 |  |  | 20 |
| $ | 104 |  |  | $ | 90 |
Accrued expenses and other current liabilities: |  |  |
Regulatory liabilities—current | $ | 44 |  |  | $ | 36 |
Accrued employee compensation and benefits | 74 |  |  | 66 |
Accrued dividends payable | 36 |  |  | 34 |
Accrued interest payable | 25 |  |  | 27 |
Accrued taxes payable | 33 |  |  | 34 |
Other | 103 |  |  | 71 |
| $ | 315 |  |  | $ | 268 |
Public Utility Property, Plant, and Equipment [Table Text Block] | Electric utility plant, net consist of the following (in millions):
| As of December 31,
| 2019 |  | 2018
Electric utility plant: |  |  |
Generation | $ | 4,749 |  |  | $ | 4,600 |
Transmission | 848 |  |  | 580 |
Distribution | 3,917 |  |  | 3,838 |
General | 656 |  |  | 611 |
Intangible | 758 |  |  | 715 |
Total in service | 10,928 |  |  | 10,344 |
Accumulated depreciation and amortization | (4,095 | ) |  | (3,803 | )
Total in service, net | 6,833 |  |  | 6,541 |
Construction work-in-progress | 328 |  |  | 346 |
Electric utility plant, net | $ | 7,161 |  |  | $ | 6,887 |

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 valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock
Namespace Prefix: | srt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, classified as other. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherAssetsAndOtherLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration