Change in Projected Benefit Obligation | Pension Benefits | Other Benefits | |||||||||||||
(In millions) | 2013 | 2012 | 2013 | 2012 | |||||||||||
Projected benefit obligation at beginning of year | $ | 24,657 | $ | 21,613 | $ | 818 | $ | 812 | |||||||
Service cost | 579 | 516 | 8 | 8 | |||||||||||
Interest cost | 996 | 1,047 | 32 | 38 | |||||||||||
Plan participants’ contributions | 15 | 18 | 43 | 44 | |||||||||||
Amendments | — | 2 | — | — | |||||||||||
Plan curtailments/settlements | (6 | ) | (5 | ) | — | — | |||||||||
Actuarial loss (gain) | (1,798 | ) | 2,670 | (70 | ) | 13 | |||||||||
Foreign exchange loss (gain) | — | 29 | — | — | |||||||||||
Benefits paid | (1,473 | ) | (1,233 | ) | (99 | ) | (97 | ) | |||||||
Projected benefit obligation at end of year | $ | 22,970 | $ | 24,657 | $ | 732 | $ | 818 |