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Segment And Geographic Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Segment And Geographic Information [Abstract] |
Segment Information |
|  | Year-Ended December 31,
|  | 2019 |  | 2018 |  | 2017
|  | (in millions)
Net revenues |  |  |  |  |  |  |  |  |
Electronic brokerage |  | $ | 1,921 |  | $ | 1,842 |  | $ | 1,405
Market making |  |  | 67 |  |  | 76 |  |  | 86
Corporate |  |  | (51) |  |  | (15) |  |  | 211
Total net revenues |  | $ | 1,937 |  | $ | 1,903 |  | $ | 1,702
Income before income taxes |  |  |  |  |  |  |  |  |
Electronic brokerage |  | $ | 1,197 |  | $ | 1,177 |  | $ | 860
Market making |  |  | 30 |  |  | 34 |  |  | (27)
Corporate |  |  | (70) |  |  | (15) |  |  | 216
Total income before income taxes |  | $ | 1,157 |  | $ | 1,196 |  | $ | 1,049
|  | December 31,
|  | 2019 |  | 2018 |  | 2017
|  | (in millions)
Segment assets |  |  |  |  |  |  |  |  |
Electronic brokerage |  | $ | 69,857 |  | $ | 58,631 |  | $ | 58,787
Market making |  |  | 2,806 |  |  | 2,736 |  |  | 8,469
Corporate |  |  | (987) |  |  | (820) |  |  | (6,094)
Total assets |  | $ | 71,676 |  | $ | 60,547 |  | $ | 61,162
Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area |
|  | Year-Ended December 31,
|  | 2019 |  | 2018 |  | 2017
|  | (in millions)
Net revenues |  |  |  |  |  |  |  |  |
United States |  | $ | 1,524 |  | $ | 1,501 |  | $ | 1,393
International |  |  | 413 |  |  | 402 |  |  | 309
Total net revenues |  | $ | 1,937 |  | $ | 1,903 |  | $ | 1,702
Income before income taxes |  |  |  |  |  |  |  |  |
United States |  | $ | 997 |  | $ | 1,029 |  | $ | 947
International |  |  | 160 |  |  | 167 |  |  | 102
Total income before income taxes |  | $ | 1,157 |  | $ | 1,196 |  | $ | 1,049

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