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Basis Of Presentation Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | $ 1,626 | $ 1,535 | $ 4,512 | $ 4,330
Segment Reporting, Reconciling Item, Corporate Non-Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | (90) | (86) | (251) | (242)
Gross commission income |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [1] | 1,323 | 1,242 | 3,680 | 3,525
Gross commission income | Segment Reporting, Reconciling Item, Corporate Non-Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [1] | 0 | 0 | 0 | 0
Service revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [2] | 165 | 156 | 457 | 434
Service revenue | Segment Reporting, Reconciling Item, Corporate Non-Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [2] | 0 | 0 | 0 | 0
Franchise fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [3] | 104 | 98 | 278 | 269
Franchise fees | Segment Reporting, Reconciling Item, Corporate Non-Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [3] | (86) | (81) | (241) | (231)
Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [4] | 34 | 39 | 97 | 102
Other | Segment Reporting, Reconciling Item, Corporate Non-Segment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [4] | (4) | (5) | (10) | (11)
Franchise Group |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 183 | 181 | 495 | 490
Franchise Group | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 273 | 267 | 746 | 732
Franchise Group | Gross commission income | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [1] | 0 | 0 | 0 | 0
Franchise Group | Service revenue | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [2] | 58 | 57 | 160 | 158
Franchise Group | Franchise fees | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [3] | 190 | 179 | 519 | 500
Franchise Group | Other | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [4] | 25 | 31 | 67 | 74
Owned Brokerage Group |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 1,340 | 1,258 | 3,728 | 3,570
Owned Brokerage Group | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 1,340 | 1,258 | 3,728 | 3,570
Owned Brokerage Group | Gross commission income | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [1] | 1,323 | 1,242 | 3,680 | 3,525
Owned Brokerage Group | Service revenue | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [2] | 7 | 7 | 20 | 18
Owned Brokerage Group | Franchise fees | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [3] | 0 | 0 | 0 | 0
Owned Brokerage Group | Other | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [4] | 10 | 9 | 28 | 27
Title Group |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 103 | 96 | 289 | 270
Title Group | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | 103 | 96 | 289 | 270
Title Group | Gross commission income | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [1] | 0 | 0 | 0 | 0
Title Group | Service revenue | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [2] | 100 | 92 | 277 | 258
Title Group | Franchise fees | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [3] | 0 | 0 | 0 | 0
Title Group | Other | Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | [4] | $ 3 | $ 4 | $ 12 | $ 12
[1] | Gross commission income at Owned Brokerage Group is recognized at a point in time at the closing of a homesale transaction
[2] | Service revenue primarily consists of title and escrow fees at Title Group and are recognized at a point in time at the closing of a homesale transaction. Service revenue at Franchise Group includes relocation fees, which are recognized as revenue when or as the related performance obligation is satisfied dependent on the type of service performed, and fees related to leads and related services, which are recognized at a point in time at the closing of a homesale transaction or at the completion of the related service.
[3] | Franchise fees at Franchise Group primarily include domestic royalties which are recognized at a point in time when the underlying franchisee revenue is earned (upon close of the homesale transaction).
[4] | Other revenue is comprised of brand marketing funds received from franchisees at Franchise Group and other miscellaneous revenues across all of the business segments.

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