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Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 5,859	$ 5,636
Segment Reporting, Reconciling Item, Corporate Non-Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	381	240
Franchise Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,400	4,326
Owned Brokerage Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	572	561
Title Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	506	509
Reportable Segment, Aggregation before Other Operating Segment | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 5,478	$ 5,396

X

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Amount of asset recognized for present right to economic benefit.

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