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Deferred Revenue (Tables) | 6 Months Ended
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Jun. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Changes in Deferred Revenue | The changes in our deferred revenue during the six months ended June 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 | 470 |  |  | 224 |  |  | 75 |  |  | 769 |
Amortization | (246) |  |  | (173) |  |  | (82) |  |  | (501) |
Deferred revenue balance at June 30, 2025 | $ | 343 |  |  | $ | 181 |  |  | $ | 77 |  |  | $ | 601 |
The changes in our deferred revenue during the six months ended June 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 | 475 |  |  | 265 |  |  | 66 |  |  | 806 |
Amortization | (244) |  |  | (191) |  |  | (76) |  |  | (511) |
Deferred revenue balance at June 30, 2024 | $ | 339 |  |  | $ | 167 |  |  | $ | 96 |  |  | $ | 602 |

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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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