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Reconciliation of Other Segment Items from Segment to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	$ 166		$ 182
Depreciation and amortization	46	$ 55
Segment Reporting, Reconciling Item, Corporate Non-Segment
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	0		0
Depreciation and amortization	4	4
Franchise Group | Operating Segments
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	0		0
Depreciation and amortization	29	29
Owned Brokerage Group | Operating Segments
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	32		31
Depreciation and amortization	10	12
Title Group | Operating Segments
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	134		151
Depreciation and amortization	3	10
Reportable Segment, Aggregation before Other Operating Segment | Operating Segments
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Equity Method Investments	166		$ 182
Depreciation and amortization	$ 42	$ 51

X

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Topic 230
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481664/323-10-45-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(10))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

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