Exhibit 12.1
Statement of Computation of Ratios of Earnings to Fixed Charges
| Three Months Ended March 31, | Year Ended December 31, | |||||||||||||||||||||||
| 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | |||||||||||||||||||
Earnings: | ||||||||||||||||||||||||
| Income before income taxes | $ | 116.2 | $ | 865.0 | $ | 159.3 | $ | 468.1 | $ | 443.7 | $ | 409.2 | ||||||||||||
| Interest expense | 134.5 | 595.9 | 131.9 | 94.8 | 95.8 | 81.0 | ||||||||||||||||||
| Interest component of rent | 3.2 | 14.2 | 3.1 | 2.6 | 2.9 | 3.2 | ||||||||||||||||||
| Total earnings for ratio | 253.9 | $ | 1,475.1 | $ | 294.3 | $ | 565.5 | $ | 542.4 | $ | 493.4 | |||||||||||||
Fixed Charges: | ||||||||||||||||||||||||
| Interest expense | $ | 134.5 | $ | 595.9 | $ | 131.9 | $ | 94.8 | $ | 95.8 | $ | 81.0 | ||||||||||||
| Capitalized interest | 0.9 | 7.8 | 2.6 | 3.0 | 2.7 | 2.0 | ||||||||||||||||||
| Interest component of rent | 3.2 | 14.2 | 3.1 | 2.6 | 2.9 | 3.2 | ||||||||||||||||||
| Total interest for ratio | 138.6 | $ | 617.9 | $ | 137.6 | $ | 100.4 | $ | 101.4 | $ | 86.2 | |||||||||||||
| Earnings to fixed charges | 1.83 | 2.39 | 2.14 | 5.63 | 5.35 | 5.72 | ||||||||||||||||||