|
Investments (Fair Value Method Investments) (Details) (USD $)
In Billions, unless otherwise specified |
3 Months Ended |
|---|---|
|
Jun. 30, 2012
|
|
| Prepaid forward sale obligations carrying value | $ 2.9 |
|
Prepaid Forward Sale Obligations [Member]
|
|
| Equity securities held as collateral | 3.5 |
| Prepaid forward sale obligations fair value | $ 3.0 |