Clearing Operations - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Clearing Organizations [Line Items]
ICE NGX cash deposits	$ 113,274	$ 76,789
Invested deposits, delivery contracts receivable and unsettled variation margin	2,811	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	4,966	5,368
National bank account \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	22,905	19,422
Reverse repo \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	55,418	33,020
Reverse repo \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	5,155	4,965
Reverse repo \| ICE Clear U.S.
Clearing Organizations [Line Items]
ICE NGX cash deposits	11,125	7,342
Sovereign debt \| ICE Clear Europe
Clearing Organizations [Line Items]
ICE NGX cash deposits	8,485	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	360	176
Demand deposits \| ICE Clear Credit
Clearing Organizations [Line Items]
ICE NGX cash deposits	4,354	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	771	1,658
Invested deposits - sovereign debt \| ICE Clear Europe
Clearing Organizations [Line Items]
Invested deposits, delivery contracts receivable and unsettled variation margin	$ 2,040	$ 2,779