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Segment And Geographic Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment And Geographic Information [Abstract]

Segment Information



		Year-Ended December 31,
		2016			2015			2014

		(in millions)
Net revenues
Electronic brokerage		$	1,239		$	1,097		$	952
Market making			190			298			284
Corporate			(33)			(206)			(193)
Total net revenues		$	1,396		$	1,189		$	1,043
Income before income taxes
Electronic brokerage		$	756		$	536		$	589
Market making			44			130			114
Corporate			(39)			(208)			(197)
Total income before income taxes		$	761		$	458		$	506







		December 31,
		2016			2015			2014

		(in millions)
Segment assets
Electronic brokerage		$	50,072		$	44,421		$	38,280
Market making			11,765			10,825			12,172
Corporate			(7,164)			(6,512)			(7,067)
Total assets		$	54,673		$	48,734		$	43,385



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



		Year-Ended December 31,
		2016			2015			2014

		(in millions)
Net revenues
United States		$	1,046		$	832		$	773
International			350			357			270
Total net revenues		$	1,396		$	1,189		$	1,043
Income before income taxes
United States		$	632		$	294		$	425
International			129			164			81
Total income before income taxes		$	761		$	458		$	506



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=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
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599

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-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

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-Name Accounting Standards Codification
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-Section 50
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