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Earnings Per Common Share | 12 Months Ended
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Dec. 31, 2012
Earnings Per Common Share | S. EARNINGS PER COMMON SHARE Reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share were as follows, in millions:
|  | 2012 |  |  | 2011 |  |  | 2010 |
Numerator (basic and diluted): |  |  |  |  |  |  |  |  |  |  |  |
Loss from continuing operations |  | $ | (76 | ) |  | $ | (465 | ) |  | $ | (1,022 | )
Allocation to unvested restricted stock awards |  |  | (2 | ) |  |  | (3 | ) |  |  | (3 | )
Loss from continuing operations attributable to common shareholders |  |  | (78 | ) |  |  | (468 | ) |  |  | (1,025 | )
Loss from discontinued operations, net |  |  | (38 | ) |  |  | (110 | ) |  |  | (21 | )
Net loss available to common shareholders |  | $ | (116 | ) |  | $ | (578 | ) |  | $ | (1,046 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic common shares (based on weighted average) |  |  | 349 |  |  |  | 348 |  |  |  | 349 |
Add: |  |  |  |  |  |  |  |  |  |  |  |
Contingent common shares |  |  | — |  |  |  | — |  |  |  | — |
Stock option dilution |  |  | — |  |  |  | — |  |  |  | — |
Diluted common shares |  |  | 349 |  |  |  | 348 |  |  |  | 349 |
The Company follows accounting guidance regarding determining whether instruments granted in share-based payment transactions are participating securities. This accounting guidance clarifies that share-based payment awards that entitle their holders to receive non-forfeitable dividends prior to vesting should be considered participating securities. The Company has granted restricted stock awards that contain non-forfeitable rights to dividends on unvested shares; such unvested restricted stock awards are considered participating securities. As participating securities, the unvested shares are required to be included in the calculation of the Company’s basic earnings per common share, using the “two-class method.” The two-class method of computing earnings per common share is an allocation method that calculates earnings per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. For the years ended December 31, 2012, 2011 and 2010, the Company allocated dividends to the unvested restricted stock awards (participating securities). At December 31, 2011 and 2010, the Company did not include any common shares related to the Zero Coupon Convertible Senior Notes (“Notes”) in the calculation of diluted earnings per common share, as the price of the Company’s common stock at December 31, 2010 did not exceed the equivalent accreted value of the Notes. Additionally, 30 million common shares, 36 million common shares and 37 million common shares for 2012, 2011 and 2010, respectively, related to stock options were excluded from the computation of diluted earnings per common share due to their antidilutive effect. Common shares outstanding included on the Company’s balance sheet and for the calculation of earnings per common share do not include unvested stock awards (8 million shares and 10 million common shares at December 31, 2012 and 2011, respectively); shares outstanding for legal requirements included all common shares that have voting rights (including unvested stock awards).

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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 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: 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 3: 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 4: 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 Reference 5: 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 6: 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 + Details
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