Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

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

	Three Months Ended March 31,
	2013		2012
Numerator (in millions):
Net income attributable to Portland General Electric Company common shareholders	$	49	$	49
Denominator (in thousands):
Weighted-average common shares outstanding—basic	75,608		75,423
Dilutive effect of unvested restricted stock units and  employee stock purchase plan shares	91		20
Weighted-average common shares outstanding—diluted	75,699		75,443
Earnings per share—basic and diluted	$	0.65	$	0.65

In addition to unvested time-based restricted stock units and employee stock purchase plan shares, unvested performance-based restricted stock units and related dividend equivalent rights are included in the computation of dilutive securities when the required performance goals are met at the end of a three-year performance period. For the three months ended March 31, 2013 and 2012, unvested performance-based restricted stock units and related dividend equivalent rights of 430,824 and 462,413, respectively, were excluded from the dilutive calculation because the performance goals had not been met.

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.