Clearing Operations - Separate Cash Accounts (Details) £ in Millions, $ in Millions, € in Billions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 GBP (£)	Dec. 31, 2018 EUR (€)	Dec. 31, 2017 EUR (€)
Clearing Organizations [Line Items]
Cash deposits	$ 63,955	$ 51,222
De Nederlandsche Bank | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 8,000	$ 4,000		€ 7.0	€ 3.3
Exchange Rate to USD	1.1466	1.2003
Bank of England | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 638		£ 500
Exchange Rate to USD	1.2756
National Bank Account | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	$ 8,647	$ 4,002
National Bank Account | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	19,484	18,445
Reverse Repurchase Agreements | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	18,097	13,927
Reverse Repurchase Agreements | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	1,935	1,680
Reverse Repurchase Agreements | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	4,380	3,033
Sovereign Debt | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	4,035	4,868
Demand Deposits | ICE Clear Europe
Clearing Organizations [Line Items]
Cash deposits	85	32
Demand Deposits | ICE Clear Credit
Clearing Organizations [Line Items]
Cash deposits	3,807	3,185
Demand Deposits | ICE Clear Canada
Clearing Organizations [Line Items]
Cash deposits	0	140
Demand Deposits | Other ICE Clearing Houses
Clearing Organizations [Line Items]
Cash deposits	8	10
US Treasury Securities | ICE Clear U.S.
Clearing Organizations [Line Items]
Cash deposits	2,340	1,164
Unsettled Variation Margin and Delivery Contracts Receivable/Payable | ICE NGX
Clearing Organizations [Line Items]
Cash deposits	$ 1,137	$ 736