Clearing Organizations - Narrative (Details) CAD in Millions, € in Billions	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 CAD	Dec. 31, 2016 USD ($)
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	$ 254,000,000			$ 254,000,000
Contribution made deposits depleted	100,000,000
Maximum exposure, undiscounted	78,300,000,000
Net notional value of unsettled contracts	2,600,000,000,000
Margin deposits and guaranty funds assets received or pledged	92,600,000,000			$ 95,700,000,000
Securities for reverse repurchase agreements	$ 24,700,000,000
Exchange rate	1.2003
NGX
Principal Transaction Revenue [Line Items]
Daylight liquidity | CAD			CAD 300
Overdraft facility | CAD			CAD 20
ICE Clear Europe
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	$ 150,000,000
Cash deposits	22,800,000,000
ICE Clear Credit
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	50,000,000
Cash deposits	18,500,000,000
ICE Clear Us
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 Clear Europe Cds Guaranty Fund
Principal Transaction Revenue [Line Items]
Contribution of own cash to guaranty fund	50,000,000
De Nederlandsche Bank
Principal Transaction Revenue [Line Items]
Cash deposits	4,000,000,000	€ 3.3
Futures and Options Products
Principal Transaction Revenue [Line Items]
Cash deposits	18,500,000,000
OTC European Cds Contracts
Principal Transaction Revenue [Line Items]
Cash deposits	4,300,000,000
Letter of Credit | NGX
Principal Transaction Revenue [Line Items]
Face amount	100,000,000
Repayments of debt	15,000,000
Amount guaranteed by parent	100,000,000
Additional losses under insurance policy	$ 100,000,000