Clearing Operations - Separate Cash Accounts (Details) € in Millions, £ in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020 EUR (€)	Jun. 30, 2020 GBP (£)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 GBP (£)
Clearing Organizations [Line Items]
Cash deposits	$ 93,960	$ 64,987
National Bank Account | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	14,545	9,667
National Bank Account | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	33,648	19,480
Reverse repo | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	27,262	19,187
Reverse repo | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	4,325	2,411
Reverse repo | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	4,657	4,320
Sovereign Debt | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	3,362	3,591
Sovereign Debt | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	1,600	2,945
Demand deposits | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	4	17
Demand deposits | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	4,053	2,522
Demand deposits | Other ICE Clearing Houses
Clearing Organizations [Line Items]
Cash deposits	9	7
Unsettled Variation Margin and Delivery Contracts Receivable/Payable | ICE NGX
Clearing Organizations [Line Items]
Cash deposits	495	840
Cash Deposit Based On Euro/US Dollar Exchange Rate | De Nederlandsche Bank | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 12,100	$ 9,000	€ 10,700		€ 8,000
Exchange rate to USD	1.1234	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	1.2400	1.3260