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Regulatory Requirements (Tables) | 6 Months Ended
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Jun. 30, 2017
Regulatory Requirements [Abstract] |
Summary Of Capital, Capital Requirements And Excess Capital |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Net Capital/ |  |  |  |  |  |
﻿ |  | Eligible Equity |  | Requirement |  | Excess
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿IB LLC |  | $ | 3,727 |  | $ | 345 |  | $ | 3,382
﻿TH LLC |  |  | 368 |  |  | 1 |  |  | 367
﻿THE |  |  | 619 |  |  | 104 |  |  | 515
﻿Other regulated Operating Companies |  |  | 757 |  |  | 93 |  |  | 664
﻿ |  | $ | 5,471 |  | $ | 543 |  | $ | 4,928
﻿

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