Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(In millions, except ratios)



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|--------------------------------------------------------------------------------------------------------------------------- |  | ----------------------- | --- | - | -------------------------------- |  | --- | ---- |  |  | ---- | ------ |  | ---- | ---- | --- |  |  | --- | --- |  |  | --- | ---
|                                                                                                                            |  | Year Ended December 31, |     |   | Three MonthsEnded 
March 31,2011 | 
|                                                                                                                            |  | 2006                    |     |   | 2007                             |  |     | 2008 |  |  | 2009 |        |  | 2010 |      |    
|Earnings:                                                                                                                   |  |                         |     |   |                                  |  |     |      |  |  |      |        |  |      |      |     |  |  |     |     |  |  |     |    
|Income (loss) from continuing operations before provision (benefit) for income taxes                                        |  |                         | 405 |   |                                  |  | 578 |      |  |  | (813 | )      |  |      | (107 | )   |  |  | (63 | )   |  |  | (27 | )  
|Add:                                                                                                                        |  |                         |     |   |                                  |  |     |      |  |  |      |        |  |      |      |     |  |  |     |     |  |  |     |    
|Fixed charges, net of capitalized interest                                                                                  |  |                         | 289 |   |                                  |  | 251 |      |  |  | 277  |        |  |      | 288  |     |  |  | 279 |     |  |  | 66  |    
|Total earnings available for fixed charges                                                                                  |  |                         | 694 |   |                                  |  | 829 |      |  |  | (536 | )      |  |      | 181  |     |  |  | 216 |     |  |  | 39  |    
|Fixed charges (1):                                                                                                          |  |                         |     |   |                                  |  |     |      |  |  |      |        |  |      |      |     |  |  |     |     |  |  |     |    
|Interest expense, net                                                                                                       |  |                         | 208 |   |                                  |  | 187 |      |  |  | 174  |        |  |      | 226  |     |  |  | 255 |     |  |  | 56  |    
|Add back interest income, which is netted in interest expense                                                               |  |                         | 11  |   |                                  |  | 6   |      |  |  | 6    |        |  |      | 1    |     |  |  | 1   |     |  |  |    |    
|Add back gains (losses) on bond repurchases/retirement of subordinated convertible debentures, included in interest
expense |  |                         |    |   |                                  |  |    |      |  |  | 41   |        |  |      | 20   |     |  |  | (28 | )   |  |  | (1  | )  
|Interest expense  subordinated convertible debentures, net                                                                 |  |                         | 13  |   |                                  |  | 9   |      |  |  | 9    |        |  |      | (4   | )   |  |  | 8   |     |  |  | 2   |    
|Capitalized interest                                                                                                        |  |                         | 1   |   |                                  |  | 2   |      |  |  | 1    |        |  |      | 1    |     |  |  |    |     |  |  |    |    
|Interest component of rent expense                                                                                          |  |                         | 53  |   |                                  |  | 49  |      |  |  | 47   |        |  |      | 45   |     |  |  | 43  |     |  |  | 9   |    
|Interest expense  discontinued operation                                                                                   |  |                         | 4   |   |                                  |  |    |      |  |  |     |        |  |      |     |     |  |  |    |     |  |  |    |    
|Fixed charges                                                                                                               |  |                         | 290 |   |                                  |  | 253 |      |  |  | 278  |        |  |      | 289  |     |  |  | 279 |     |  |  | 66  |    
|Ratio of earnings to fixed charges                                                                                          |  |                         | 2.4 | x |                                  |  | 3.3 | x    |  |  |     | (2)(3) |  |      |     | (2) |  |  |    | (2) |  |  |    | (2)



|(1) | Fixed charges consist of interest expense, which includes amortization of deferred finance charges, interest expense-subordinated debentures, capitalized interest and
imputed interest on our lease obligations. The interest component of rent is determined based on an estimate of a reasonable interest factor at the inception of the leases.
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|(2) | Due to our losses for the three months ended March 31, 2011 and the years ended December 31, 2010, 2009 and 2008, the ratio coverage was less than 1:1 for
these periods. We would have had to have generated additional earnings of $27, $63, $108, and $814 for the three months ended March 31, 2011 and the years ended December 31, 2010, 2009 and 2008, respectively, to have achieved coverage
ratios of 1:1.
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|(3) | The loss for the year ended December 31, 2008 includes the effect of an $1,147 pretax non-cash goodwill impairment charge. The effect of this charge was to reduce
the ratio of earnings to fixed charges. Had this charge been excluded from the calculation, the ratio of earnings to fixed charges would have been 2.2x for the year ended December 31, 2008.
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