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Deferred Revenue - Schedule of Changes in Deferred Revenue (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Disaggregation Of Revenue [Roll Forward]    
Beginning balance $ 307 $ 254
Additions 806 742
Amortization (511) (467)
Ending balance 602 529
Listings Revenues    
Disaggregation Of Revenue [Roll Forward]    
Beginning balance 108 115
Additions 475 474
Amortization (244) (252)
Ending balance 339 337
Data Services and Other Revenues    
Disaggregation Of Revenue [Roll Forward]    
Beginning balance 93 88
Additions 265 236
Amortization (191) (175)
Ending balance 167 149
Mortgage technology    
Disaggregation Of Revenue [Roll Forward]    
Beginning balance 106 51
Additions 66 32
Amortization (76) (40)
Ending balance $ 96 $ 43