Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 350	$ 310	$ 1,090	$ 922	$ 1,295
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax (expense) benefit of $1 and $3 for the six months ended June 30, 2016 and 2015, respectively, and ($1) and ($1) for the three months ended June 30, 2016 and 2015, respectively	(46)	(36)	(245)	(17)
Change in fair value of available-for-sale securities	(12)	(87)	117	(126)
Comprehensive income	292	187	962	777
Comprehensive income attributable to non-controlling interest	(6)	(4)	(20)	(18)
Comprehensive income attributable to IntercontinentalExchange Group, Inc.	286	183	942	759
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	$ 0	$ 0	$ 0	$ (2)