v3.25.0.1
Deferred Revenue (Tables)
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Deferred Revenue The changes in our deferred revenue during 2024 and 2023 are as follows (in millions):
Listing RevenuesData Services and Other RevenuesMortgage TechnologyTotal
Deferred revenue balance at January 1, 2023
$115 $88 $51 $254 
Additions(1)
490 401 177 1,068 
Amortization
(497)(396)(122)(1,015)
Deferred revenue balance at December 31, 2023
108 93 106 307 
Additions500 400 147 1,047 
Amortization
(489)(363)(169)(1,021)
Deferred revenue balance at December 31, 2024
$119 $130 $84 $333 
(1)    Additions in our Mortgage Technology segment in the table above include $68 million of deferred revenue acquired on the date of the Black Knight acquisition (Note 3) and $37 million of Black Knight related deferred revenue added in the period after the date of acquisition through December 31, 2023.
As of December 31, 2024, we estimate that our deferred revenue will be recognized in the following years (in millions):
Listing RevenuesData Services and Other RevenuesMortgage TechnologyTotal
2025$41 $122 $74 $237 
202636 5 5 46 
202725 2 2 29 
202812 1 2 15 
20294 — 1 5 
Thereafter1 — — 1 
Total$119 $130 $84 $333