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



	Three Months Ended June 30,					Six Months Ended June 30,
	2013			2012		2013		2012
Numerator (in millions):
Net income (loss) attributable to Portland General Electric Company common shareholders	$	(22	)	$	26	$	27	$	75
Denominator (in thousands):
Weighted-average common shares outstanding—basic	75,935			75,507		75,772		75,465
Dilutive effect of shares issuable pursuant to the EFSA, unvested restricted stock units, and employee stock purchase plan shares	—			10		121		14
Weighted-average common shares outstanding—diluted	75,935			75,517		75,893		75,479
Earnings (loss) per share—basic and diluted	$	(0.29	)	$	0.34	$	0.36	$	0.99

Basic and diluted earnings (loss) 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 operations. 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.