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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedules of Intangible Assets and Goodwill
The following is a summary of the activity in our goodwill balance by segment for the nine months ended September 30, 2024 (in millions):
Exchanges SegmentFixed Income and Data Services SegmentMortgage Technology SegmentTotal Consolidated
Goodwill balance at December 31, 2023
$8,155 $4,854 $17,544 $30,553 
Acquisition— — 4 4 
Foreign currency translation15 2 — 17 
Other activity, net
— — 24 24 
Goodwill balance at September 30, 2024
$8,170 $4,856 $17,572 $30,598 

The following is a summary of the activity in our other intangible assets balance for the nine months ended September 30, 2024 (in millions):
Other intangible assets balance at December 31, 2023
$17,317 
Acquisition
3 
Foreign currency translation
12 
Amortization of other intangible assets
(759)
Other intangible assets balance at September 30, 2024
$16,573