Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Financial data for our business segments is as follows for the six months and three months endedJune 30, 2018 and 2017 (in millions):

	Six Months Ended June 30, 2018						Six Months Ended June 30, 2017
	Trading and Clearing Segment		Data and Listings Segment		Consolidated		Trading and Clearing Segment		Data and Listings Segment		Consolidated
Revenues:
Energy futures and options contracts	$	485	$	—	$	485	$	459	$	—	$	459
Agricultural and metals futures and options contracts	139		—		139		118		—		118
Interest rates and other financial futures and options contracts	185		—		185		172		—		172
Cash equities and equity options	827		—		827		771		—		771
OTC and other transactions	126		—		126		95		—		95
Pricing and analytics	—		516		516		—		480		480
Exchange data	—		287		287		—		280		280
Desktops and connectivity	—		243		243		—		281		281
Listings	—		220		220		—		217		217
Other revenues	108		—		108		94		—		94
Revenues	1,870		1,266		3,136		1,709		1,258		2,967
Transaction-based expenses	665		—		665		621		—		621
Revenues, less transaction-based expenses	1,205		1,266		2,471		1,088		1,258		2,346
Operating expenses	425		741		1,166		397		758		1,155
Operating income	$	780	$	525	$	1,305	$	691	$	500	$	1,191

	Three Months Ended June 30, 2018						Three Months Ended June 30, 2017
	Trading and Clearing Segment		Data and Listings Segment		Consolidated		Trading and Clearing Segment		Data and Listings Segment		Consolidated
Revenues:
Energy futures and options contracts	$	250	$	—	$	250	$	231	$	—	$	231
Agricultural and metals futures and options contracts	74		—		74		62		—		62
Interest rates and other financial futures and options contracts	94		—		94		89		—		89
Cash equities and equity options	389		—		389		390		—		390
OTC and other transactions	57		—		57		45		—		45
Pricing and analytics	—		262		262		—		242		242
Exchange data	—		144		144		—		142		142
Desktops and connectivity	—		120		120		—		137		137
Listings	—		111		111		—		109		109
Other revenues	55		—		55		49		—		49
Revenues	919		637		1,556		866		630		1,496
Transaction-based expenses	310		—		310		316		—		316
Revenues, less transaction-based expenses	609		637		1,246		550		630		1,180
Operating expenses	218		373		591		197		374		571
Operating income	$	391	$	264	$	655	$	353	$	256	$	609