Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 2,542	$ 1,449	$ 1,295
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax benefit of ($6), ($22) and ($4) for the years ended December 31, 2017, 2016 and 2015, respectively	133	(300)	(58)
Change in fair value of available-for-sale securities	68	134	(81)
Reclassification of realized gain on available-for-sale investment to other income	(176)	0	0
Reclassification of foreign currency translation loss on sale of Trayport to other expense	76	0	0
Comprehensive income from equity method investment	0	0	2
Employee benefit plan net gains (losses), net of tax expense of $8 and $7 for the years ended December 31, 2017 and 2016, respectively	20	10	(5)
Other comprehensive income (loss)	121	(156)	(142)
Comprehensive income	2,663	1,293	1,153
Comprehensive income attributable to non-controlling interest	(28)	(27)	(21)
Comprehensive income attributable to Intercontinental Exchange, Inc.	$ 2,635	$ 1,266	$ 1,132