Income Taxes

3 Months Ended

Mar. 31, 2012

Income Taxes [Abstract]

Income Tax Disclosure [Text Block]

(8) Income Taxes

The effective tax rate was 27% for the three-month period ended March 31, 2012 compared to 33% for 2011. The decrease in PacifiCorp's effective tax rate for the three-month period ended March 31, 2012 compared to the prior period was primarily due to the effects of ratemaking in the prior year.