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Segment And Geographic Information (Tables) | 6 Months Ended
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Jun. 30, 2019
Segment And Geographic Information [Abstract] |
Segment Information |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
|  | (in millions)
Net revenues |  |  |  |  |  |  |  |  |  |  |  |
Electronic brokerage |  | $ | 473 |  | $ | 443 |  | $ | 929 |  | $ | 908
Market making |  |  | 20 |  |  | 22 |  |  | 35 |  |  | 43
Corporate |  |  | (80) |  |  | (20) |  |  | 7 |  |  | 21
Total net revenues |  | $ | 413 |  | $ | 445 |  | $ | 971 |  | $ | 972
Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
Electronic brokerage |  | $ | 302 |  | $ | 283 |  | $ | 552 |  | $ | 574
Market making |  |  | 11 |  |  | 9 |  |  | 17 |  |  | 18
Corporate |  |  | (88) |  |  | (21) |  |  | (5) |  |  | 19
Total income before income taxes |  | $ | 225 |  | $ | 271 |  | $ | 564 |  | $ | 611
|  | June 30, |  | December 31,
|  | 2019 |  | 2018
|  | (in millions)
Segment assets |  |  |  |  |  |
Electronic brokerage |  | $ | 64,217 |  | $ | 58,631
Market making |  |  | 2,656 |  |  | 2,736
Corporate |  |  | (839) |  |  | (820)
Total assets |  | $ | 66,034 |  | $ | 60,547
Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
|  | (in millions)
Net revenues |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 310 |  | $ | 345 |  | $ | 771 |  | $ | 765
International |  |  | 103 |  |  | 100 |  |  | 200 |  |  | 207
Total net revenues |  | $ | 413 |  | $ | 445 |  | $ | 971 |  | $ | 972
Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 182 |  | $ | 231 |  | $ | 495 |  | $ | 525
International |  |  | 43 |  |  | 40 |  |  | 69 |  |  | 86
Total income before income taxes |  | $ | 225 |  | $ | 271 |  | $ | 564 |  | $ | 611

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