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Reconciliations of Revenues from Segment to Consolidated (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		$ 5,692	$ 5,636	$ 6,908
Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	319	315	373
Franchise Group
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		642	668	772
Franchise Group | Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	319	315	373
Franchise Group | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		961	983	1,145
Owned Brokerage Group
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		4,688	4,628	5,606
Owned Brokerage Group | Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	0	0	0
Owned Brokerage Group | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		4,688	4,628	5,606
Title Group
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		362	340	530
Title Group | Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	0	0	0
Title Group | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		362	340	530
Reportable Segment, Aggregation before Other Operating Segment | Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	[1]	319	315	373
Reportable Segment, Aggregation before Other Operating Segment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues		$ 6,011	$ 5,951	$ 7,281
[1] Intersegment revenues include intercompany royalties and marketing fees paid by Owned Brokerage Group to Franchise Group and are eliminated in consolidation.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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