Deferred Revenue (Changes in Deferred Revenue) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	$ 873
Additions	647
Revenue Recognized	(494)
Foreign Currency Translation	(6)
Ending balance	1,020
Initial Listings
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	96
Additions	28
Revenue Recognized	(20)
Foreign Currency Translation	(1)
Ending balance	103
Annual Listings
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	3
Additions	199
Revenue Recognized	(1)
Foreign Currency Translation	(1)
Ending balance	200
Workflow & Insights
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	199
Additions	135
Revenue Recognized	(126)
Foreign Currency Translation	0
Ending balance	208
Other
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	24
Additions	11
Revenue Recognized	(7)
Foreign Currency Translation	(1)
Ending balance	27
Financial Crime Management Technology
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	189
Additions	133
Revenue Recognized	(130)
Foreign Currency Translation	0
Ending balance	192
Regulatory Technology
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	166
Additions	82
Revenue Recognized	(107)
Foreign Currency Translation	0
Ending balance	141
Capital Markets Technology
Change in Contract with Customer Liability [Roll Forward]
Beginning balance	196
Additions	59
Revenue Recognized	(103)
Foreign Currency Translation	(3)
Ending balance	$ 149