|
Investments (Fair Value Method Investments) (Details) (USD $)
|
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2014
|
Dec. 31, 2013
|
|
| Fair value equity securities held as collateral | $ 2,250,000,000 | $ 3,959,000,000 |
| Obligations under prepaid forward sale agreements | 470,000,000 | 811,000,000 |
| Derivative component of prepaid forward sale agreements | 1,586,000,000 | 2,800,000,000 |
| Total liabilities associated with prepaid forward sale agreements | 2,056,000,000 | 3,611,000,000 |
| Prepaid forward sale obligations fair value | 2,100,000,000 | |
| Equity securities held as collateral under our prepaid forward sale agreements acquired during the period | $ 1,500,000,000 |