The following table provides the effects as of December 31, 2013 of a one-percentage-point increase or decrease in the healthcare cost trend rate assumed for postretirement benefits: | ||||||||
(MILLIONS OF DOLLARS) | Increase | Decrease | ||||||
Effect on total service and interest cost components | $ | 15 | $ | (14 | ) | |||
Effect on postretirement benefit obligation | 248 | (222 | ) | |||||