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Segment And Geographic Information (Tables) | 6 Months Ended
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Jun. 30, 2016
Segment And Geographic Information [Abstract] |
Segment And Geographic Information |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended June 30, |  | Six Months Ended June 30,
﻿ |  | 2016 |  | 2015 |  | 2016 |  | 2015
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Net revenues |  |  |  |  |  |  |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 310 |  | $ | 288 |  | $ | 657 |  | $ | 578
﻿Market making |  |  | 43 |  |  | 72 |  |  | 102 |  |  | 139
﻿Corporate |  |  | 16 |  |  | 27 |  |  | 99 |  |  | (158)
﻿Total net revenues |  | $ | 369 |  | $ | 387 |  | $ | 858 |  | $ | 559
﻿Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 191 |  | $ | 188 |  | $ | 426 |  | $ | 239
﻿Market making |  |  | 5 |  |  | 30 |  |  | 25 |  |  | 57
﻿Corporate |  |  | 17 |  |  | 22 |  |  | 99 |  |  | (167)
﻿Total income before income taxes |  | $ | 213 |  | $ | 240 |  | $ | 550 |  | $ | 129
﻿ ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | June 30, |  | December 31,
﻿ |  | 2016 |  | 2015
﻿ |  |  |  |  |  |
﻿ |  | (in millions)
﻿Segment Assets |  |  |  |  |  |
﻿Electronic brokerage |  | $ | 46,805 |  | $ | 44,421
﻿Market making |  |  | 11,680 |  |  | 10,825
﻿Corporate |  |  | (6,656) |  |  | (6,512)
﻿Total assets |  | $ | 51,829 |  | $ | 48,734
﻿
Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended June 30, |  | Six Months Ended June 30,
﻿ |  | 2016 |  | 2015 |  | 2016 |  | 2015
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | (in millions)
﻿Net revenues |  |  |  |  |  |  |  |  |  |  |  |
﻿United States |  | $ | 278 |  | $ | 310 |  | $ | 682 |  | $ | 379
﻿International |  |  | 91 |  |  | 77 |  |  | 176 |  |  | 180
﻿Total net revenues |  | $ | 369 |  | $ | 387 |  | $ | 858 |  | $ | 559
﻿Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
﻿United States |  | $ | 177 |  | $ | 208 |  | $ | 485 |  | $ | 43
﻿International |  |  | 36 |  |  | 32 |  |  | 65 |  |  | 86
﻿Total income before income taxes |  | $ | 213 |  | $ | 240 |  | $ | 550 |  | $ | 129
﻿

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8736-108599 + Details
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