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Income tax Income tax (Tables) | 9 Months Ended
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Sep. 30, 2024
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The significant differences between the Federal statutory tax rate and PGE’s effective tax rate are reflected in the following table:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Federal statutory tax rate | 21.0 | % |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Federal tax credits* | (16.5) |  |  | (14.2) |  |  | (16.9) |  |  | (11.1) |
State and local taxes, net of federal tax benefit | 7.3 |  |  | 5.8 |  |  | 8.5 |  |  | 7.9 |
Flow-through depreciation and cost basis differences | (0.6) |  |  | (0.7) |  |  | (0.6) |  |  | 0.1 |
Reversal of excess deferred income tax | (1.9) |  |  | (4.4) |  |  | (2.4) |  |  | (3.9) |
Other | 1.2 |  |  | 3.8 |  |  | 0.6 |  |  | 1.8 |
Effective tax rate | 10.5 | % |  | 11.3 | % |  | 10.2 | % |  | 15.8 | %
* Federal tax credits primarily consist of production tax credits (PTCs) earned from Company-owned wind-powered generating facilities. PTCs are earned based on a per-kilowatt hour rate and, as a result, the annual amount of PTCs earned will vary based on weather conditions and availability of the facilities. PTCs are earned for 10 years from the in-service dates of the corresponding facilities. PGE’s PTC generation will end at various dates through 2034.

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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