Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 2,472	$ 2,459
Transaction-based expenses	576	560
Total revenues, less transaction-based expenses	1,896	1,899
Operating expenses	927	907
Operating income	969	992
Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	1,673	1,643
Transaction-based expenses	576	560
Total revenues, less transaction-based expenses	1,097	1,083
Operating expenses	332	299
Operating income	765	784
Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	563	509
Transaction-based expenses	0	0
Total revenues, less transaction-based expenses	563	509
Operating expenses	343	354
Operating income	220	155
Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	236	307
Transaction-based expenses	0	0
Total revenues, less transaction-based expenses	236	307
Operating expenses	252	254
Operating income	(16)	53
Energy futures and options
Segment Reporting Information [Line Items]
Total revenues	345	353
Energy futures and options | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	345	353
Energy futures and options | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Energy futures and options | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Agricultural and metals futures and options
Segment Reporting Information [Line Items]
Total revenues	70	61
Agricultural and metals futures and options | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	70	61
Agricultural and metals futures and options | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Agricultural and metals futures and options | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Financial futures and options
Segment Reporting Information [Line Items]
Total revenues	128	130
Financial futures and options | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	128	130
Financial futures and options | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Financial futures and options | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Cash equities and equity options
Segment Reporting Information [Line Items]
Total revenues	671	659
Cash equities and equity options | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	671	659
Cash equities and equity options | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Cash equities and equity options | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
OTC and other
Segment Reporting Information [Line Items]
Total revenues	101	97
OTC and other | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	101	97
OTC and other | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
OTC and other | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Data and connectivity services
Segment Reporting Information [Line Items]
Total revenues	232	214
Data and connectivity services | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	232	214
Data and connectivity services | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Data and connectivity services | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Listings
Segment Reporting Information [Line Items]
Total revenues	126	129
Listings | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	126	129
Listings | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Listings | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Fixed income execution
Segment Reporting Information [Line Items]
Total revenues	32	15
Fixed income execution | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Fixed income execution | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	32	15
Fixed income execution | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
CDS clearing
Segment Reporting Information [Line Items]
Total revenues	101	72
CDS clearing | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
CDS clearing | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	101	72
CDS clearing | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Fixed income data and analytics
Segment Reporting Information [Line Items]
Total revenues	276	277
Fixed income data and analytics | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Fixed income data and analytics | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	276	277
Fixed income data and analytics | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Other data and network services
Segment Reporting Information [Line Items]
Total revenues	154	145
Other data and network services | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Other data and network services | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	154	145
Other data and network services | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Origination technology
Segment Reporting Information [Line Items]
Total revenues	167	203
Origination technology | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Origination technology | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Origination technology | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	167	203
Closing solutions
Segment Reporting Information [Line Items]
Total revenues	40	72
Closing solutions | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Closing solutions | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Closing solutions | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	40	72
Data and analytics
Segment Reporting Information [Line Items]
Total revenues	21	20
Data and analytics | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Data and analytics | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Data and analytics | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	21	20
Other
Segment Reporting Information [Line Items]
Total revenues	8	12
Other | Exchanges Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Other | Fixed Income and Data Services Segment
Segment Reporting Information [Line Items]
Total revenues	0	0
Other | Mortgage Technology Segment
Segment Reporting Information [Line Items]
Total revenues	$ 8	$ 12