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Segment And Geographic Information (Tables) | 9 Months Ended
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Sep. 30, 2016
Segment And Geographic Information [Abstract] |
Segment Information |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
﻿ |  | 2016 |  | 2015 |  | 2016 |  | 2015
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Net revenues |  |  |  |  |  |  |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 288 |  | $ | 300 |  | $ | 945 |  | $ | 878
﻿Market making |  |  | 43 |  |  | 90 |  |  | 145 |  |  | 229
﻿Corporate |  |  | 14 |  |  | (31) |  |  | 113 |  |  | (189)
﻿Total net revenues |  | $ | 345 |  | $ | 359 |  | $ | 1,203 |  | $ | 918
﻿Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 162 |  | $ | 184 |  | $ | 588 |  | $ | 423
﻿Market making |  |  | 7 |  |  | 46 |  |  | 32 |  |  | 103
﻿Corporate |  |  | 14 |  |  | (28) |  |  | 113 |  |  | (195)
﻿Total income before income taxes |  | $ | 183 |  | $ | 202 |  | $ | 733 |  | $ | 331
﻿ ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | September 30, |  | December 31,
﻿ |  | 2016 |  | 2015
﻿ |  |  |  |  |  |
﻿ |  | (in millions)
﻿Segment Assets |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 50,307 |  | $ | 44,421
﻿Market making |  |  | 11,777 |  |  | 10,825
﻿Corporate |  |  | (7,020) |  |  | (6,512)
﻿Total assets |  | $ | 55,064 |  | $ | 48,734
﻿
Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
﻿ |  | 2016 |  | 2015 |  | 2016 |  | 2015
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Net revenues |  |  |  |  |  |  |  |  |  |  |  |
﻿United States |  | $ | 265 |  | $ | 261 |  | $ | 947 |  | $ | 640
﻿International |  |  | 80 |  |  | 98 |  |  | 256 |  |  | 278
﻿Total net revenues |  | $ | 345 |  | $ | 359 |  | $ | 1,203 |  | $ | 918
﻿Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
﻿United States |  | $ | 156 |  | $ | 155 |  | $ | 641 |  | $ | 198
﻿International |  |  | 27 |  |  | 47 |  |  | 92 |  |  | 133
﻿Total income before income taxes |  | $ | 183 |  | $ | 202 |  | $ | 733 |  | $ | 331
﻿

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