|
Regulatory Requirements (Summary Of Capital, Capital Requirements And Excess Capital) (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2014
|
|---|---|
| Net Capital / Eligible Equity | $ 3,870.2 |
| Required net capital | 637.2 |
| Excess regulatory capital | 3,233.0 |
|
IB LLC [Member]
|
|
| Net Capital / Eligible Equity | 2,262.1 |
| Required net capital | 332.6 |
| Excess regulatory capital | 1,929.5 |
|
TH LLC [Member]
|
|
| Net Capital / Eligible Equity | 436.0 |
| Required net capital | 60.3 |
| Excess regulatory capital | 375.7 |
|
THE [Member]
|
|
| Net Capital / Eligible Equity | 706.8 |
| Required net capital | 197.2 |
| Excess regulatory capital | 509.6 |
|
Other Regulated Operating Companies [Member]
|
|
| Net Capital / Eligible Equity | 465.3 |
| Required net capital | 47.1 |
| Excess regulatory capital | $ 418.2 |