Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 2,020	$ 2,554	$ 1,457
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax expense (benefit) of ($1), ($6) and ($22) for 2018, 2017 and 2016, respectively, and net impact of $1 from adoption of ASU 2018-02 in 2018	(91)	133	(300)
Change in fair value of available-for-sale securities	0	68	134
Reclassification of realized gain on available-for-sale investment to other income	0	(176)	0
Reclassification of foreign currency translation loss on sale of Trayport to other expense	0	76	0
Employee benefit plan net gains (losses), net of tax expense of $9, $8 and $7 in 2018, 2017 and 2016, respectively, and net impact of $25 from adoption of ASU 2018-02 in 2018	(1)	20	10
Other comprehensive income (loss)	(92)	121	(156)
Comprehensive income	1,928	2,675	1,301
Comprehensive income attributable to non-controlling interest	(32)	(28)	(27)
Comprehensive income attributable to Intercontinental Exchange, Inc.	$ 1,896	$ 2,647	$ 1,274