Clearing Operations - Narrative (Details) $ in Millions		1 Months Ended	12 Months Ended
	Jan. 31, 2019 USD ($)	Feb. 28, 2018 USD ($)	Dec. 31, 2018 USD ($) CDS_index instrument clearing_house	Dec. 31, 2017 USD ($)
Principal Transaction Revenue [Line Items]
Number of clearing organizations | clearing_house			6
Margin deposits and guaranty funds assets received or pledged			$ 121,400	$ 92,600
Contribution of own cash to guaranty fund			$ 253	$ 254
Number of single name instruments cleared | instrument			515
Number of CDS indexes cleared | CDS_index			154
Net notional value of unsettled contracts			$ 2,800,000
Maximum exposure, undiscounted			101,000
ICE Futures Europe, ICE Futures U.S. and ICE Endex Exchanges
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund			67
Average guaranty fund contributions subject to minimum contribution			10
Letter of Credit | ICE NGX
Principal Transaction Revenue [Line Items]
Face amount			100
Amount of guaranty eliminated		$ 100
Repayments of debt			15
Additional losses under insurance policy			100
Futures and options | ICE Clear Europe
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund			100
CDS | ICE Clear Europe
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund			$ 50
Subsequent event | ICE Clear Europe
Principal Transaction Revenue [Line Items]
Increase in contribution to guaranty fund	$ 27