Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Components of Earnings per Share [Abstract]

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

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator (in millions):
Net income attributable to Portland General Electric Company common shareholders	$	31	$	38	$	58	$	113
Denominator (in thousands):
Weighted-average common shares outstanding—basic	77,637		75,528		76,401		75,486
Dilutive effect of potential common shares	693		13		302		14
Weighted-average common shares outstanding—diluted	78,330		75,541		76,703		75,500
Earnings per share—basic and diluted	$	0.40	$	0.50	$	0.76	$	1.49

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 condensed 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.