Operating EBITDA (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended	12 Months Ended
		Dec. 31, 2022	Dec. 31, 2020	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2008	Dec. 31, 2007
Segment Reporting Information [Line Items]
Operating EBITDA						$ 449		$ 902	$ 726
Depreciation and amortization						214		204	186
Interest expense, net						113		190	246
Income tax (benefit) expense						(68)		133	(104)
Restructuring costs, net	[1],[2]					32		17	67
Impairments	[3]					483		4	682
Former parent legacy cost, net	[4]					1		1	1
Loss on the early extinguishment of debt	[4]					96		21	8
Gain on the sale of businesses, investments or other assets, net	[5]					(135)		(11)	0
Net Income (Loss) Attributable to Parent						(287)		343	(360)
Goodwill, Impairment Loss						(394)	[6]		(540)	[7]	$ (253)	$ (1,279)	$ (507)
Other Asset Impairment Charges						13			50
Cartus Relocation Services Reserves Recorded					$ (133)
Franchise Group
Segment Reporting Information [Line Items]
Operating EBITDA						670		751	594
Depreciation and amortization						119		112	87
Restructuring costs, net						1		5	15
Goodwill, Impairment Loss		$ (114)	$ (22)		$ (105)	(114)	[6]		(127)	[7]
Franchise Group | Indefinite life—Trademarks
Segment Reporting Information [Line Items]
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]		Costs and Expenses	Costs and Expenses	Costs and Expenses
Owned Brokerage Group
Segment Reporting Information [Line Items]
Operating EBITDA						(86)		109	48
Depreciation and amortization						63		56	59
Restructuring costs, net						19		7	37
Goodwill, Impairment Loss		$ (280)		$ (413)		(280)	[6]		(413)	[7]
Title Group
Segment Reporting Information [Line Items]
Operating EBITDA						9		200	226
Depreciation and amortization						11		11	11
Restructuring costs, net									4
Goodwill, Impairment Loss						0	[6]		0	[7]
Corporate and Other
Segment Reporting Information [Line Items]
Operating EBITDA	[4],[8]					(144)		(158)	(142)
Depreciation and amortization						21		25	29
Restructuring costs, net						$ 12		$ 5	$ 11

[1] Restructuring charges for the year ended December 31, 2022 include $20 million of expense related to the Operational Efficiencies Plan and $12 million of expense related to prior restructuring plans. Restructuring charges for the years ended December 31, 2021 and December 31, 2020 related to prior restructuring plans.

[2] The year ended December 31, 2022 includes restructuring charges of $1 million at Franchise Group, $19 million at Owned Brokerage Group and $12 million at Corporate and Other. The year ended December 31, 2021 includes restructuring charges of $5 million at Franchise Group, $7 million at Owned Brokerage Group and $5 million at Corporate and Other. The year ended December 31, 2020 includes restructuring charges of $15 million at Franchise Group, $37 million at Owned Brokerage Group, $4 million at Title Group and $11 million at Corporate and Other.

[3] Non-cash impairments for the year ended December 31, 2022 include an impairment of goodwill at the Owned Brokerage Group reporting unit of $280 million, an impairment of goodwill at the Franchise Group segment of $114 million related to the Cartus/Leads Group reporting unit, an impairment of franchise trademarks of $76 million and $13 million of other impairment charges related to lease asset, investment and software impairments. Non-cash impairments for the year ended December 31, 2021 primarily relate to software and lease asset impairments. Non-cash impairments for the year ended December 31, 2020 include: •a goodwill impairment charge of $413 million related to Owned Brokerage Group; •an impairment charge of $30 million related to Franchise Group's trademarks; •$133 million of impairment charges during the nine months ended September 30, 2020 (while Cartus was held for sale) to reduce the net assets to the estimated proceeds; •a goodwill impairment charge of $22 million related to Cartus; •an impairment charge of $34 million related to Cartus' trademarks; and •other asset impairments of $50 million primarily related to lease asset impairments.

[4] Former parent legacy items and Loss on the early extinguishment of debt are recorded in Corporate and Other.

[5] Gain on the sale of businesses, investments or other assets, net for the year ended December 31, 2022 is recorded in Title Group and related to the sale of the Title Underwriter during the first quarter of 2022 and the sale of a portion of the Company's ownership in the Title Insurance Underwriter Joint Venture during the second quarter of 2022. Gain on the sale of businesses, investments or other assets, net for the year ended December 31, 2021 is primarily recorded in Owned Brokerage Group.

[6] During the year ended December 31, 2022, the Company recognized a goodwill impairment charge of $280 million related to Owned Brokerage Group reporting unit and a goodwill impairment charge of $114 million related to the Cartus/Leads Group reporting unit which is reported within the Franchise Group reportable segment.

[7] During the year ended December 31, 2020, the Company recognized a goodwill impairment charges of $413 million related to Owned Brokerage Group and $127 million at Franchise Group which related to $105 million during the nine months ended September 30, 2020 (while Cartus was held for sale) to reduce the net assets to the estimated proceeds and an additional goodwill impairment charge of $22 million during the fourth quarter of 2020 related to Cartus.

[8] Includes the elimination of transactions between segments.