Earnings Per Common Share - Reconciliation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic:
Net income attributable to Intercontinental Exchange, Inc.	$ 526	$ 390	$ 523	$ 650	$ 448	$ 529	$ 472	$ 484	$ 2,089	$ 1,933	$ 1,988
Weighted average common shares outstanding (in shares)									552	561	575
Basic earnings per common share (in dollars per share)	$ 0.94	$ 0.71	$ 0.96	$ 1.18	$ 0.81	$ 0.95	$ 0.84	$ 0.85	$ 3.79	$ 3.44	$ 3.46
Diluted:
Weighted average common shares outstanding (in shares)									552	561	575
Effect of dilutive securities - stock options and restricted stock (in shares)									3	4	4
Diluted weighted average common shares outstanding (in shares)									555	565	579
Diluted earnings per common share (in dollars per share)	$ 0.93	$ 0.71	$ 0.95	$ 1.17	$ 0.80	$ 0.94	$ 0.84	$ 0.85	$ 3.77	$ 3.42	$ 3.43