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Deferred Revenue (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Changes in Deferred Revenue | The changes in our deferred revenue during the nine months ended September 30, 2025 are as follows (in millions):
| Listings Revenues |  | Data Services and Other Revenues |  | Mortgage Technology |  | Total
Deferred revenue balance at January 1, 2025 | $ | 119 |  |  | $ | 130 |  |  | $ | 84 |  |  | $ | 333 |
Additions | 483 |  |  | 282 |  |  | 105 |  |  | 870 |
Amortization | (370) |  |  | (267) |  |  | (119) |  |  | (756) |
Deferred revenue balance at September 30, 2025 | $ | 232 |  |  | $ | 145 |  |  | $ | 70 |  |  | $ | 447 |
The changes in our deferred revenue during the nine months ended September 30, 2024 are as follows (in millions):
| Listings Revenues |  | Data Services and Other Revenues |  | Mortgage Technology |  | Total
Deferred revenue balance at January 1, 2024 | $ | 108 |  |  | $ | 93 |  |  | $ | 106 |  |  | $ | 307 |
Additions | 487 |  |  | 335 |  |  | 106 |  |  | 928 |
Amortization | (366) |  |  | (270) |  |  | (124) |  |  | (760) |
Deferred revenue balance at September 30, 2024 | $ | 229 |  |  | $ | 158 |  |  | $ | 88 |  |  | $ | 475 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- References No definition available. + Details
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