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Segment And Geographic Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment And Geographic Information [Abstract]

Segment Information



		Year-Ended December 31,
		2018			2017			2016
		(in millions)
Net revenues
Electronic brokerage		$	1,842		$	1,405		$	1,239
Market making			76			86			190
Corporate			(15)			211			(33)
Total net revenues		$	1,903		$	1,702		$	1,396
Income before income taxes
Electronic brokerage		$	1,177		$	860		$	756
Market making			34			(27)			44
Corporate			(15)			216			(39)
Total income before income taxes		$	1,196		$	1,049		$	761







		December 31,
		2018			2017			2016

		(in millions)
Segment assets
Electronic brokerage		$	58,631		$	58,787		$	50,072
Market making			2,736			8,469			11,765
Corporate			(820)			(6,094)			(7,164)
Total assets		$	60,547		$	61,162		$	54,673



Schedule Of Total Net Revenues And Income Before Income Taxes By Geographic Area



		Year-Ended December 31,
		2018			2017			2018
		(in millions)
Net revenues
United States		$	1,501		$	1,393		$	1,046
International			402			309			350
Total net revenues		$	1,903		$	1,702		$	1,396
Income before income taxes
United States		$	1,029		$	947		$	632
International			167			102			129
Total income before income taxes		$	1,196		$	1,049		$	761



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- Definition

Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.

+ References

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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.

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