Year Ended December 31, | ||||||||||||||||
2017 | 2016 | 2015 | 2014 | 2013 | ||||||||||||
Earnings: | ||||||||||||||||
Income before income taxes | $ | 7,148 | $ | 5,136 | $ | 7,342 | $ | 4,637 | $ | 6,674 | ||||||
Add: Interest expense | 453 | 381 | 341 | 353 | 380 | |||||||||||
Add: Interest factor in rental expense | 268 | 229 | 223 | 225 | 192 | |||||||||||
Total earnings | $ | 7,869 | $ | 5,746 | $ | 7,906 | $ | 5,215 | $ | 7,246 | ||||||
Fixed charges: | ||||||||||||||||
Interest expense | $ | 453 | $ | 381 | $ | 341 | $ | 353 | $ | 380 | ||||||
Interest capitalized | 49 | 14 | 13 | 11 | 14 | |||||||||||
Interest factor in rental expense | 268 | 229 | 223 | 225 | 192 | |||||||||||
Total fixed charges | $ | 770 | $ | 624 | $ | 577 | $ | 589 | $ | 586 | ||||||
Ratio of earnings to fixed charges | 10.2 | 9.2 | 13.7 | 8.9 | 12.4 | |||||||||||