Pension Benefits | Medical and Life Benefits | ||||||||||||
$ in millions | 2013 | 2012 | 2013 | 2012 | |||||||||
Amounts recorded in accumulated other comprehensive loss | |||||||||||||
Net actuarial loss | ($5,291 | ) | ($8,057 | ) | ($151 | ) | ($461 | ) | |||||
Prior service credit | 423 | 481 | 47 | 98 | |||||||||
Income tax benefits related to above items | 1,928 | 3,003 | 44 | 146 | |||||||||
Unamortized benefit plan costs | ($2,940 | ) | ($4,573 | ) | ($ 60 | ) | ($217 | ) | |||||