Earnings Per Share Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Components of basic and diluted earnings per share are as follows:



	Years Ended December 31,
	2011		2010		2009
Numerator (in millions):
Net income attributable to Portland General Electric Company common shareholders	$	147	$	125	$	95
Denominator (in thousands):
Weighted average common shares outstanding—basic	75,333		75,275		72,790
Dilutive effect of unvested restricted stock units and employee stock purchase plan shares	17		16		62
Weighted average common shares outstanding—diluted	75,350		75,291		72,852

Earnings per share—basic and diluted	$	1.95	$	1.66	$	1.31

Basic and diluted earnings per share amounts are calculated based on actual amounts rather than the rounded amounts presented in the table above and on the consolidated statements of income. Accordingly, calculations using the rounded amounts presented for net income and weighted average shares outstanding may yield results that vary from the earnings per share amounts presented in the table above.