EXHIBIT 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines.



|                                                                 |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|---------------------------------------------------------------- |  | ------------------------- | ---- | --- | ------------------------- | - | ------------------------- |  | ------------------------------- | --- |  | ----------------------------- | --- | ------------------------- |  | - | --- |  | - | ---
|                                                                 |  | Successor                 |      |     | Predecessor              
|                                                                 |  | YearEndedDecember 31,2009 |      |     | YearEndedDecember 31,2008 |   | YearEndedDecember 31,2007 |  | NineMonthsEndedDecember 31,2006 |     |  | ThreeMonthsEndedMarch 31,2006 |     | YearEndedDecember 31,2005
|                                                                 |  | (in millions)             |      |     |                           |   |                          
|Earnings as defined for fixed charges calculation                |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Add:                                                             |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Pre-tax income from continuing operations                        |  | $                         | (240 | )   |                           | $ | 458                       |  | $                               | 415 |  | $                             | 102 |                           |  | $ | 186 |  | $ | 412
|Fixed charges                                                    |  |                           | 128  |     |                           |   | 122                       |  |                                 | 139 |  |                               | 100 |                           |  |   | 35  |  |   | 114
|Deduct:                                                          |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Interest capitalized(a)                                          |  |                           | 4    |     |                           |   | 19                        |  |                                 | 30  |  |                               | 14  |                           |  |   | 3   |  |   | 7  
|                                                                 |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|                                                                 |  |                           |      |     |                           |  
|Total earnings (as defined for the Fixed Charges calculation)(b) |  | $                         | (116 | )   |                           | $ | 561                       |  | $                               | 524 |  | $                             | 188 |                           |  | $ | 218 |  | $ | 519
|                                                                 |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|                                                                 |  |                           |      |     |                           |  
|Fixed charges:                                                   |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Interest on debt, including capitalized portions                 |  | $                         | 121  |     |                           | $ | 113                       |  | $                               | 130 |  | $                             | 95  |                           |  | $ | 33  |  | $ | 105
|Estimate of interest within rental expense                       |  |                           | 7    |     |                           |   | 9                         |  |                                 | 9   |  |                               | 5   |                           |  |   | 2   |  |   | 9  
|                                                                 |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Total fixed charges                                              |  | $                         | 128  |     |                           | $ | 122                       |  | $                               | 139 |  | $                             | 100 |                           |  | $ | 35  |  | $ | 114
|                                                                 |  |                           |      |     |                           |   |                           |  |                                 |     |  |                               |     |                           |  |   |     |  |   |    
|Ratio of earnings to fixed charges                               |  |                           |     | (b) |                           |   | 4.6                       |  |                                 | 3.8 |  |                               | 1.9 |                           |  |   | 6.2 |  |   | 4.6



|(a) | Excludes equity costs related to AFUDC that are included in Other Income and Expenses in the Consolidated Statements of Operations.
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|(b) | Earnings insufficient to cover fixed charges by approximately $244 million during the year ended December 31, 2009 due primarily to a non-cash goodwill impairment
charge.
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