Summary of Significant Accounting Policies - Schedule of New Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues from contract with customer, excluding assessed tax	$ 1,463	$ 1,435	$ 4,599	$ 4,402
Total revenues, less transaction-based expenses	1,200	1,146	3,671	3,492
Income tax expense	89	186	381	540
Net income attributable to Intercontinental Exchange, Inc.	$ 458	$ 371	$ 1,377	$ 1,293
Basic (in dollars per share)	$ 0.80	$ 0.63	$ 2.39	$ 2.19
Diluted (in dollars per share)	$ 0.79	$ 0.63	$ 2.37	$ 2.17
Previously Reported
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues from contract with customer, excluding assessed tax		$ 1,432		$ 4,395
Total revenues, less transaction-based expenses		1,143		3,485
Income tax expense		185		537
Net income attributable to Intercontinental Exchange, Inc.		$ 369		$ 1,289
Basic (in dollars per share)		$ 0.63		$ 2.18
Diluted (in dollars per share)		$ 0.62		$ 2.17
Restatement Adjustment | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues from contract with customer, excluding assessed tax		$ 3		$ 7
Total revenues, less transaction-based expenses		3		7
Income tax expense		1		3
Net income attributable to Intercontinental Exchange, Inc.		$ 2		$ 4
Basic (in dollars per share)		$ 0.00		$ 0.01
Diluted (in dollars per share)		$ 0.01		$ 0.00