|
Short-Term Investments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Short-term investments | $ 1,852 | $ 959 |
|
Externally Managed Investment Accounts [Member]
|
||
| Short-term investments | $ 1,500 |