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Description of Business	9 Months Ended
Description of Business	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Nature of Business and Organization We are a leading provider of marketplace infrastructure, data services and technology solutions to a broad range of customers including financial institutions, corporations and government entities. Through our markets, clearinghouses, listings, data and technology offerings, we provide comprehensive workflow solutions that enable our customers to manage risk, raise capital and operate their businesses more efficiently. We operate regulated marketplaces for listing, trading and clearing of a broad array of derivatives contracts and securities across major asset classes including: energy and agricultural commodities, metals, interest rates, equities, exchange-traded funds, or ETFs, credit derivatives, digital assets, bonds and currencies. In addition, we offer comprehensive data services to support the trading, investment, risk management and connectivity needs of customers around the world and across asset classes. We also offer technology solutions that support the United States, or U.S., residential mortgage industry from application and loan origination, through to final settlement. We operate marketplaces and provide data services in the U.S., United Kingdom, or U.K., European Union, or EU, Canada and Singapore, and offer technology and data solutions to the U.S. mortgage industry.