Summary of Significant Accounting Policies - Schedule of New Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 1,580.0	$ 1,471.0
Revenues, less transaction-based expenses	1,225.0	1,166.0
Income tax expense	143.0	214.0
Net income attributable to Intercontinental Exchange, Inc.	$ 464.0	$ 503.0
Basic (in dollars per share)	$ 0.80	$ 0.85
Diluted (in dollars per share)	$ 0.79	$ 0.84
As Reported
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ 1,469.0
Revenues, less transaction-based expenses		1,164.0
Income tax expense		213.0
Net income attributable to Intercontinental Exchange, Inc.		$ 502.0
Basic (in dollars per share)		$ 0.84
Diluted (in dollars per share)		$ 0.84
New Revenue Standard Adjustment | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ 2.0
Revenues, less transaction-based expenses		2.0
Income tax expense		1.0
Net income attributable to Intercontinental Exchange, Inc.		$ 1.0
Basic (in dollars per share)		$ 0.01
Diluted (in dollars per share)		$ 0.00