Clearing Organizations - Narrative (Details) € in Billions, £ in Billions	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2018 GBP (£)	Mar. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($)
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	$ 254,000,000
Margin deposits and guaranty funds assets received Or pledged	102,500,000,000			$ 92,600,000,000
Securities for reverse repurchase agreements	25,600,000,000
Cash deposits held in federal reserve bank	$ 19,400,000,000
Exchange rate related to cash deposits held in De Nederlandsche Bank	1.2324
Exchange rate related to cash deposits held in Bank of England	1.4022
ICE Clear Europe
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	$ 150,000,000
ICE Clear Credit
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	50,000,000
Ice Clear U.S.
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	50,000,000
ICE Clear Canada, ICE Clear Netherlands and ICE Clear Singapore
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	4,000,000
ICE Futures Europe, ICE Futures U.S. and ICE Endex Exchanges
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	67,000,000
Average guaranty fund contributions subject to minimum contribution	10,000,000
De Nederlandsche Bank
Principal Transaction Revenue [Line Items]
Cash deposits	3,100,000,000		€ 2.5
Bank of England
Principal Transaction Revenue [Line Items]
Cash deposits	2,500,000,000	£ 1.8
Letter of Credit | NGX
Principal Transaction Revenue [Line Items]
Amount of guaranty eliminated	100,000,000
Debt instrument, face amount	100,000,000
Repayments of secured debt	15,000,000
Additional losses under insurance policy (up to)	$ 100,000,000