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Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,636	$ 5,839	$ 6,383
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	240	248
Franchise Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,326	4,430
Owned Brokerage Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	561	630
Title Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	509	531
Reportable Segment, Aggregation before Other Operating Segment | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,396	$ 5,591

X

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Amount of asset recognized for present right to economic benefit.

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