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Income tax Income tax (Tables)
6 Months Ended
Jun. 30, 2023
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 June 30, Six Months Ended June 30,
2023202220232022
Federal statutory tax rate21.0 %21.0 %21.0 %21.0 %
Federal tax credits*
(11.2)(9.5)(10.0)(10.0)
State and local taxes, net of federal tax benefit8.3 9.0 8.8 9.0 
Flow-through depreciation and cost basis differences(0.6)0.6 0.5 0.6 
Amortization of excess deferred income tax(3.8)(4.1)(3.7)(4.3)
Other7.1 (0.1)0.9 (0.1)
Effective tax rate20.8 %16.9 %17.5 %16.2 %
* 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 2033.