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Earnings Per Share (Notes) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE Basic earnings (loss) per share is computed based on the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per share is computed using the weighted average number of common shares outstanding and the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares consist of: (1) employee stock purchase plan shares; (2) unvested time-based and performance-based restricted stock units along with associated dividend equivalent rights; and (3) shares issuable pursuant to an equity forward sale agreement (EFSA). See Note 6, Equity, for additional information on the EFSA and its impact on earnings per share. Unvested performance-based restricted stock units and associated dividend equivalent rights are included in dilutive potential common shares only after the performance criteria has been met. For the three and six month periods ended June 30, 2013 and 2012, unvested performance-based restricted stock units and related dividend equivalent rights of 435,224 and 466,624, respectively, were excluded from the dilutive calculation because the performance goals had not been met. Due to PGE’s net loss position for the three months ended June 30, 2013, shares of approximately 228,000 related to shares issuable pursuant to the EFSA and unvested restricted stock units shares were excluded from the diluted weighted average common shares outstanding as their effect would have been anti-dilutive. 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.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 + Details
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