Clearing Operations - Guaranty Fund Contributions and Default Insurance (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	$ 407	$ 404
Default insurance	250	250
ICE Clear Europe
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	237	233
Default insurance	75	75	$ 75
ICE Clear U.S.
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	103	103
Default insurance	25	25
ICE Clear Credit
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	50	50
Default insurance	50	50	$ 50
ICE Clear Netherlands
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	2	2
ICE Clear Singapore
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	0	1
ICE NGX
Clearing Organizations [Line Items]
ICE Portion of Guaranty Fund Contribution	15	15
Default insurance	$ 100	$ 100