Three Months Ended March 31, 2015 | Year Ended Dec. 31 | ||||||||||||||||||||||
| 2014 | 2013 | 2012 | 2011 | 2010 | |||||||||||||||||||
| Earnings, as defined: | |||||||||||||||||||||||
| Pretax income | $ | 176,901 | $ | 698,779 | $ | 704,123 | $ | 690,620 | $ | 625,164 | $ | 628,901 | |||||||||||
| Add: Fixed charges | 58,001 | 232,832 | 232,539 | 254,443 | 253,867 | 233,604 | |||||||||||||||||
| Total earnings, as defined | $ | 234,902 | $ | 931,611 | $ | 936,662 | $ | 945,063 | $ | 879,031 | $ | 862,505 | |||||||||||
| Fixed charges, as defined: | |||||||||||||||||||||||
| Interest charges | $ | 43,090 | $ | 171,881 | $ | 173,602 | $ | 188,094 | $ | 186,885 | $ | 171,945 | |||||||||||
| Interest charges on life insurance policy borrowings | 37 | 214 | 245 | 310 | 332 | 372 | |||||||||||||||||
| Interest component of leases | 14,874 | 60,737 | 58,692 | 66,039 | 66,650 | 61,287 | |||||||||||||||||
| Total fixed charges, as defined | $ | 58,001 | $ | 232,832 | $ | 232,539 | $ | 254,443 | $ | 253,867 | $ | 233,604 | |||||||||||
| Ratio of earnings to fixed charges | 4.0 | 4.0 | 4.0 | 3.7 | 3.5 | 3.7 | |||||||||||||||||
