| For the Three Months Ended March 31, | For the Years Ended December 31, | ||||||||||||||||||||||
| 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | ||||||||||||||||||
| Calculation of fixed charges ratio: | |||||||||||||||||||||||
| Income (loss) before provision (benefit) for income taxes, equity in earnings of unconsolidated subsidiaries and cumulative effect of change in accounting policy | $ | 166 | $ | 978 | $ | 925 | $ | 821 | $ | 868 | $ | (375 | ) | ||||||||||
| Add/(deduct): | |||||||||||||||||||||||
| Fixed charges | 38 | 142 | 131 | 147 | 265 | 285 | |||||||||||||||||
| Amortization of capitalized interest | 1 | 3 | 2 | 2 | 2 | 1 | |||||||||||||||||
| Capitalized interest | — | (2 | ) | (2 | ) | (3 | ) | (8 | ) | (8 | ) | ||||||||||||
| Total earnings available for fixed charges | $ | 205 | $ | 1,121 | $ | 1,056 | $ | 967 | $ | 1,127 | $ | (97 | ) | ||||||||||
Fixed charges: | |||||||||||||||||||||||
| Interest expense | $ | 34 | $ | 125 | $ | 114 | $ | 128 | $ | 243 | $ | 257 | |||||||||||
| Capitalized interest | — | 2 | 2 | 3 | 8 | 8 | |||||||||||||||||
Interest component of rental expense(1) | 4 | 15 | 15 | 16 | 14 | 20 | |||||||||||||||||
| Total fixed charges | $ | 38 | $ | 142 | $ | 131 | $ | 147 | $ | 265 | $ | 285 | |||||||||||
| Ratio of earnings to fixed charges | 5.4x | 7.9x | 8.1x | 6.6x | 4.3x | — | |||||||||||||||||
| Deficiency in the coverage of earnings to fixed charges | $ | — | $ | — | $ | — | $ | — | $ | — | $ | 382 | |||||||||||
| (1) | Represents a reasonable estimate of the interest component of rental expense incurred by us. |
