Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 1,016	$ 270	$ 562
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax expense (benefit) of ($5), $3, and $1 for the years ended December 31, 2014, 2013 and 2012, respectively	(130)	70	29
Change in fair value of available-for-sale securities	55	(67)	(60)
Reclassification of losses realized on available-for-sale securities to other expense	0	190	0
Change in fair value or discontinuance of net investment hedge, net of tax expense (benefit) of $7 and ($12) for the years ended December 31, 2014 and 2013, respectively	21	(19)	0
Employee benefit plan adjustments:
Net (losses) gains, net of tax expense (benefit) of ($78) and $2 for the years ended December 31, 2014 and 2013, respectively	(117)	3	0
Other comprehensive income (loss)	(171)	177	(31)
Comprehensive income	845	447	531
Comprehensive income attributable to non-controlling interest	(35)	(16)	(10)
Comprehensive income attributable to IntercontinentalExchange Group, Inc.	$ 810	$ 431	$ 521