|
Employee Benefits Textual (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
| Employee Benefits Textual [Abstract] | ||||
| Defined benefit plan settlement loss recognized during period, portion remaining in comprehensive income based on percentage reduction in the benefit obligation | $ 68 | $ 5 | $ 71 | $ 5 |
| Decrease in defined benefit plan liability from remeasurement | 772 | (12) | 778 | (17) |
| Increase in cumulative other comprehensive income from remeasurement of defined benefit plan obligation, before tax | 840 | |||
| Increase in cumulative other comprehensive income from remeasurement of defined benefit plan obligation, after tax | $ 524 | |||
| Discount rate, benefit obligation | 4.75% | 4.75% | ||