Clearing Operations - Separate Cash Accounts (Details) € in Millions, £ in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 GBP (£)	Mar. 31, 2020 EUR (€)	Dec. 31, 2019 GBP (£)	Dec. 31, 2019 EUR (€)
Clearing Organizations [Line Items]
Cash deposits	$ 108,863	$ 64,987
National Bank Account | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	11,618	9,667
National Bank Account | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	35,183	19,480
Reverse repo | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	27,291	19,187
Reverse repo | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	3,035	2,411
Reverse repo | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	5,050	4,320
Sovereign Debt | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	10,094	3,591
Sovereign Debt | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	10,819	2,945
Demand deposits | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	7	17
Demand deposits | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	5,192	2,522
Demand deposits | Other ICE Clearing Houses
Clearing Organizations [Line Items]
Cash deposits	10	7
Unsettled Variation Margin and Delivery Contracts Receivable/Payable | ICE NGX
Clearing Organizations [Line Items]
Cash deposits	564	840
Cash Deposit Based On Euro/US Dollar Exchange Rate | De Nederlandsche Bank | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 9,100	$ 9,000		€ 8,300		€ 8,000
Exchange rate to USD	1.1035	1.1212
Cash Deposit Based On Euro/US Dollar Exchange Rate | Bank of England | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 11	$ 11		€ 10		€ 10
Cash Deposit Based On Pound Sterling/US Dollar Exchange Rate | Bank of England | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 2,500	$ 663	£ 2,000		£ 500
Exchange rate to USD	1.2414	1.3260