Reconciliation of Depreciation and Amortization from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	$ 196	$ 214	$ 204
Corporate, Non-Segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	18	21	25
Franchise Group | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	114	119	112
Owned Brokerage Group | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	52	63	56
Title Group | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	$ 12	$ 11	$ 11