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Segment And Geographic Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment And Geographic Information [Abstract]

Segment Information



		Three Months Ended June 30,						Six Months Ended June 30,
		2018			2017			2018			2017
		(in millions)
Net revenues
Electronic brokerage		$	443		$	334		$	908		$	648
Market making			22			23			43			31
Corporate			(20)			30			21			82
Total net revenues		$	445		$	387		$	972		$	761
Income before income taxes
Electronic brokerage		$	283		$	198		$	574		$	383
Market making			9			(24)			18			(46)
Corporate			(21)			30			19			80
Total income before income taxes		$	271		$	204		$	611		$	417







		June 30,			December 31,
		2018			2017

		(in millions)
Segment assets
Electronic brokerage		$	58,355		$	58,787
Market making			2,781			8,469
Corporate			(833)			(6,094)
Total assets		$	60,303		$	61,162



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



		Three Months Ended June 30,						Six Months Ended June 30,
		2018			2017			2018			2017
		(in millions)
Net revenues
United States		$	345		$	316		$	765		$	619
International			100			71			207			142
Total net revenues		$	445		$	387		$	972		$	761
Income before income taxes
United States		$	231		$	186		$	525		$	381
International			40			18			86			36
Total income before income taxes		$	271		$	204		$	611		$	417



X

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph a
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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=68060357&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-Publisher FASB
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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