Clearing Operations - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Clearing Organizations [Line Items]
ICE NGX cash deposits	$ 114,599	$ 76,789
Invested deposits, delivery contracts receivable and unsettled variation margin	2,313	4,437
ICE NGX
Clearing Organizations [Line Items]
ICE NGX cash deposits	15
National bank account \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	5,609	5,368
National bank account \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	22,992	19,422
Reverse repo \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	58,525	33,020
Reverse repo \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	5,882	4,965
Reverse repo \| ICE Clear U.S.
Clearing Organizations [Line Items]
ICE NGX cash deposits	9,822	7,342
Sovereign debt \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	7,644	2,359
Sovereign debt \| ICE Clear U.S.
Clearing Organizations [Line Items]
ICE NGX cash deposits	497	563
Demand deposits \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	100	176
Demand deposits \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	3,519	3,564
Demand deposits \| Other ICE Clearing Houses
Clearing Organizations [Line Items]
ICE NGX cash deposits	9	10
Unsettled variation margin and delivery contracts receivable \| ICE NGX
Clearing Organizations [Line Items]
Invested deposits, delivery contracts receivable and unsettled variation margin	757	1,658
Invested deposits - sovereign debt \| ICE Clear Europe
Clearing Organizations [Line Items]
Invested deposits, delivery contracts receivable and unsettled variation margin	$ 1,556	$ 2,779