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Investments, Equity Method and Joint Ventures (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Nov. 06, 2024 | Mar. 29, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  | $ 182,000,000 | $ 178,000,000 |  |  |
Sotheby's % Ownership in Concierge Auctions |  |  |  |  | 80.00% |  |  |  |
Dividends received from unconsolidated entities |  |  |  |  | $ 3,000,000 | 8,000,000 | $ 3,000,000 |  |
Equity in (earnings) losses of unconsolidated entities |  |  |  |  | (7,000,000) | (9,000,000) | 28,000,000 |  |
Binding term sheet with a subsidiary of JV related to the sale, percentage of the preferred equity |  |  |  |  |  |  |  | 1000.00% |
Binding term sheet with a subsidiary of JV related to the sale, value |  |  |  |  |  |  |  | $ 18.8 |
Binding term sheet with a subsidiary of JV related to the sale, percentage of the right to purchase |  |  |  |  |  |  |  | 10000.00% |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Title Insurance Underwriter |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Disposal Group Consideration Received |  |  |  |  |  |  |  |  | $ 210,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Other Nonoperating Income (Expense) |  |  |  |  |
Title Insurance Underwriter Joint Venture |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 30.00%
Equity Method Investment, Realized Gain (Loss) on Disposal |  | $ 1,000,000 | $ 4,000,000 |  |  |  |  |  |
Title Group | Guaranteed Rate Affinity |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investments | [1] |  |  |  | $ 65,000,000 | 67,000,000 |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 49.90% |  |  |  |
Equity in (earnings) losses of unconsolidated entities |  |  |  |  | $ 2,000,000 | 0 | 22,000,000 |  |
Title Group | Title Insurance Underwriter Joint Venture |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investments | [2] |  |  |  | $ 73,000,000 | $ 74,000,000 |  |  |
Equity Method Investment, Ownership Percentage |  |  | 26.00% |  | 22.00% | 25.00% |  |  |
Equity in (earnings) losses of unconsolidated entities |  |  |  |  | $ 1,000,000 | $ (4,000,000) | (6,000,000) |  |
Owned Brokerage Group | Real Estate Auction Joint Venture |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 50.00% |  |  |  |
Title Group and Owned Brokerage Group | Other Equity Method Investments |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investments | [3] |  |  |  | $ 44,000,000 | 37,000,000 |  |  |
Dividends received from unconsolidated entities |  |  |  |  | 3,000,000 |  |  |  |
Equity in (earnings) losses of unconsolidated entities |  |  |  |  | $ (10,000,000) | $ (5,000,000) | $ 12,000,000 |  |
[1] | Represents the Company's 49.9% minority-owned mortgage origination joint venture with Guaranteed Rate, Inc at Title Group which originates and markets its mortgage lending services to the Company's real estate brokerage as well as other real estate brokerage companies across the country.
[2] | Represents the Company's 22% equity interest in the Title Insurance Underwriter Joint Venture at Title Group (see below under the header "Title Insurance Underwriter Joint Venture" for further discussion).
[3] | Includes the Company's various other equity method investments at Title Group and Brokerage Group, including the Company's 50% owned unconsolidated real estate auction joint venture with Sotheby's which holds an 80% ownership stake in Sotheby's Concierge Auctions. The Company received $3 million in cash dividends related to these investments during the year ended December 31, 2024.

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