Three Months Ended March 31, 2014 | Year Ended Dec. 31 | ||||||||||||||||||||||
| 2013 | 2012 | 2011 | 2010 | 2009 | |||||||||||||||||||
| Earnings, as defined: | |||||||||||||||||||||||
| Pretax income from operations | $ | 165,963 | $ | 575,203 | $ | 515,665 | $ | 544,630 | $ | 455,416 | $ | 468,891 | |||||||||||
| Add: Fixed charges | 56,088 | 227,301 | 243,317 | 249,587 | 243,620 | 239,022 | |||||||||||||||||
| Total earnings, as defined | $ | 222,051 | $ | 802,504 | $ | 758,982 | $ | 794,217 | $ | 699,036 | $ | 707,913 | |||||||||||
| Fixed charges, as defined: | |||||||||||||||||||||||
| Interest charges | $ | 47,452 | $ | 191,889 | $ | 201,158 | $ | 208,003 | $ | 201,431 | $ | 194,808 | |||||||||||
| Interest component of leases | 8,636 | 35,412 | 42,159 | 41,584 | 42,189 | 44,214 | |||||||||||||||||
| Total fixed charges, as defined | $ | 56,088 | $ | 227,301 | $ | 243,317 | $ | 249,587 | $ | 243,620 | $ | 239,022 | |||||||||||
| Ratio of earnings to fixed charges | 4.0 | 3.5 | 3.1 | 3.2 | 2.9 | 3.0 | |||||||||||||||||
