|
Commitments and Contingencies (Details)
In Millions, unless otherwise specified |
3 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2012
USD ($)
|
Mar. 31, 2012
GBP (£)
|
Mar. 31, 2012
Alleged Damages [Member]
Minimum [Member]
USD ($)
|
Mar. 31, 2012
Alleged Damages [Member]
Maximum [Member]
USD ($)
|
|
| Loss Contingencies [Line Items] | ||||
| Portfolio amount of client seeking damages | £ 500 | |||
| Damages sought | 177 | 234 | ||
| Realized losses in the portfolio | $ (125) | |||