Exhibit 12.1
Computation of Ratios
The computation of the ratio of earnings to fixed charges for the six months ended June 30, 2008 and the years ended December 31, 2007, 2006, 2005,
2004 and 2003 are as follows:
| Six Months Ended | Years Ended December 31, | |||||||||||||||||||
| (Millions) | June 30, 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | ||||||||||||||
| Pretax income from continuing operations | $ | 1,396.4 | $ | 2,796.4 | $ | 2,586.6 | $ | 2,453.3 | $ | 1,760.0 | $ | 1,378.7 | ||||||||
| Add back fixed charges | 141.7 | 234.3 | 199.5 | 177.5 | 165.5 | 161.1 | ||||||||||||||
| Income, as adjusted | $ | 1,538.1 | $ | 3,030.7 | $ | 2,786.1 | $ | 2,630.8 | $ | 1,925.5 | $ | 1,539.8 | ||||||||
| Fixed charges: | ||||||||||||||||||||
| Interest on indebtedness | $ | 111.0 | $ | 180.6 | $ | 148.3 | $ | 122.8 | $ | 104.7 | $ | 102.9 | ||||||||
| Portion of rents representative | ||||||||||||||||||||
| of interest factor | 30.7 | 53.7 | 51.2 | 54.7 | 60.8 | 58.2 | ||||||||||||||
| Total fixed charges | $ | 141.7 | $ | 234.3 | $ | 199.5 | $ | 177.5 | $ | 165.5 | $ | 161.1 | ||||||||
| Ratio of earnings to fixed charges | 10.85 | 12.94 | 13.97 | 14.82 | 11.63 | 9.56 | ||||||||||||||