Summary of Significant Accounting Policies - Revenue Recognition, New Accounting Guidance ASC 606 (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues											$ 5,843
Total revenues, less transaction-based expenses	$ 1,298	$ 1,336	$ 1,298	$ 1,270	$ 1,308	$ 1,200	$ 1,246	$ 1,225	$ 5,202	$ 4,979	4,638
Income tax benefit									521	500	(28)
Net income attributable to Intercontinental Exchange, Inc.	$ 448	$ 529	$ 472	$ 484	$ 611	$ 458	$ 455	$ 464	$ 1,933	$ 1,988	$ 2,526
Diluted (in dollars per share)	$ 0.80	$ 0.94	$ 0.84	$ 0.85	$ 1.07	$ 0.79	$ 0.78	$ 0.79	$ 3.42	$ 3.43	$ 4.25
Deferred revenue, current	$ 129				$ 135				$ 129	$ 135	$ 125
Deferred revenue, non-current	72				82				72	82	91
Net deferred tax liabilities	2,314				2,335				2,314	2,335	2,295
Retained earnings	$ 9,629				$ 8,317				$ 9,629	$ 8,317	6,858
As Reported | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues											5,834
Total revenues, less transaction-based expenses											4,629
Income tax benefit											(25)
Net income attributable to Intercontinental Exchange, Inc.											$ 2,514
Diluted (in dollars per share)											$ 4.23
Deferred revenue, current											$ 121
Deferred revenue, non-current											143
Net deferred tax liabilities											2,280
Retained earnings											6,825
New Revenue Standard Adjustment | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues											9
Total revenues, less transaction-based expenses											9
Income tax benefit											(3)
Net income attributable to Intercontinental Exchange, Inc.											$ 12
Diluted (in dollars per share)											$ 0.02
Deferred revenue, current											$ 4
Deferred revenue, non-current											(52)
Net deferred tax liabilities											15
Retained earnings											$ 33