|
Collateralized Transactions (Amounts Related to Collateralized Transactions) (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2014
|
Dec. 31, 2013
|
||||
|---|---|---|---|---|---|---|
|
Permitted To Repledge [Member]
|
||||||
| Collateralized Transactions [Line Items] | ||||||
| Securities lending transactions | $ 10,023.5 | $ 9,331.9 | ||||
| Agreements to resell | 6,187.0 | [1] | 7,116.1 | [1] | ||
| Customer margin assets | 14,122.6 | 11,753.3 | ||||
| Total collateralized transactions | 30,333.1 | 28,201.3 | ||||
|
Sold Or Repledged [Member]
|
||||||
| Collateralized Transactions [Line Items] | ||||||
| Securities lending transactions | 3,170.3 | 2,504.3 | ||||
| Agreements to resell | 6,183.8 | [1] | 7,099.6 | [1] | ||
| Customer margin assets | 5,564.4 | 4,602.9 | ||||
| Total collateralized transactions | $ 14,918.5 | $ 14,206.8 | ||||
|
||||||