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Earnings Per Share | 6 Months Ended
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Jun. 30, 2013
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Earnings Per Share | Note 12: Earnings Per Share Basic earnings per share excludes dilution and is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflects the dilutive effect of all stock options, warrants and other items outstanding during the period that could potentially result in the issuance of common stock. For the three months ended June 30, 2013 and 2012, there were 26,762,203 and 28,737,819, respectively, of stock options and warrants outstanding that were not included in the diluted earnings per share calculation because they were antidilutive. For the six months ended June 30, 2013 and 2012, there were 27,563,460 and 28,812,255, respectively, of stock options and warrants outstanding that were not included in the diluted earnings per share calculation because they were antidilutive. The following table presents the computation of basic and diluted earnings per share for the three and six months ended June 30, 2013 and 2012:
|  |  | Three Months Ended June 30, |  | Six Months Ended June 30,
$ in millions except share and per share amounts |  | 2013 |  | 2012 |  | 2013 |  |  | 2012
Net income (loss) |  | $ | (178) |  | $ | 581 |  | $ | (14) |  | $ | 591
Basic weighted average shares (1) |  |  | 193,104,610 |  |  | 193,926,953 |  |  | 193,810,351 |  |  | 193,700,328
Effect of common stock equivalents: |  |  |  |  |  |  |  |  |  |  |  |
| Stock options and warrants |  |  | 0 |  |  | 1,014,280 |  |  | 0 |  |  | 1,063,289
Diluted weighted average shares |  |  | 193,104,610 |  |  | 194,941,233 |  |  | 193,810,351 |  |  | 194,763,617
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |
| Basic |  | $ | (0.92) |  | $ | 2.99 |  | $ | (0.07) |  | $ | 3.05
| Diluted |  | $ | (0.92) |  | $ | 2.98 |  | $ | (0.07) |  | $ | 3.03
_________ |  |  |  |  |  |  |  |  |  |  |  |
(1) - Includes 4,490,348 and 5,597,797 of unvested restricted stock and units that receive nonforfeitable dividends or dividend equivalents for the three months ended June 30,
| 2013 and 2012, respectively. Includes 5,303,456 and 5,400,564 of unvested restricted stock and units that receive nonforfeitable dividends or dividend equivalents for the
| six months ended June 30, 2013 and 2012, respectively.

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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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