| |
Pension Plans | Postretirement Benefit Plans |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
(in millions) |
2013 | 2012 | 2011 | 2013 | 2012 | 2011 | |||||||||||||
|
Net Periodic Benefit Cost: |
|||||||||||||||||||
|
Service cost |
$ | 118 | $ | 113 | $ | 98 | $ | — | $ | — | $ | — | |||||||
|
Interest cost on benefit obligation |
132 | 138 | 135 | 9 | 12 | 13 | |||||||||||||
|
Expected return on plan assets |
(208 | ) | (187 | ) | (182 | ) | (1 | ) | (1 | ) | (1 | ) | |||||||
|
Amortization of unrecognized: |
|||||||||||||||||||
|
Prior service benefit |
— | — | — | (2 | ) | — | — | ||||||||||||
|
Net actuarial loss (gain) |
107 | 89 | 76 | — | (1 | ) | — | ||||||||||||
|
Net benefit expense |
$ | 149 | $ | 153 | $ | 127 | $ | 6 | $ | 10 | $ | 12 | |||||||
|
Other Changes in Benefit Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income: |
|||||||||||||||||||
|
Prior service benefit |
$ | — | $ | — | $ | — | $ | — | $ | — | $ | — | |||||||
|
Net actuarial loss (gain) |
(518 | ) | 176 | 388 | (24 | ) | 11 | (5 | ) | ||||||||||
|
Plan amendments |
— | — | — | — | (31 | ) | — | ||||||||||||
|
Amortization of prior service benefit |
— | — | — | 2 | — | — | |||||||||||||
|
Amortization of net actuarial gain (loss) |
(107 | ) | (89 | ) | (76 | ) | — | 1 | — | ||||||||||
|
Total other changes recognized in other comprehensive income |
(625 | ) | 87 | 312 | (22 | ) | (19 | ) | (5 | ) | |||||||||
|
Total other changes recognized in net benefit expense and other comprehensive income |
$ | (476 | ) | $ | 240 | $ | 439 | $ | (16 | ) | $ | (9 | ) | $ | 7 | ||||