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Restructuring Costs (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring costs, net | [1],[2] | $ 11 |  | $ 25
Corporate, Non-Segment |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring costs, net |  | 4 |  | 5
Operational Efficiencies Program |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2023 |  | 14 |  |
Restructuring costs, net |  | 10 | [3] | 23
Costs paid or otherwise settled |  | (8) |  |
Balance at March 31, 2024 |  | 16 |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 90 |  |
Amount incurred to date |  | 73 |  |
Total amount remaining to be incurred |  | 17 |  |
Operational Efficiencies Program | Corporate, Non-Segment |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 10 |  |
Amount incurred to date |  | 10 |  |
Total amount remaining to be incurred |  | 0 |  |
Operational Efficiencies Program | Franchise Group |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 14 |  |
Amount incurred to date |  | 14 |  |
Total amount remaining to be incurred |  | 0 |  |
Operational Efficiencies Program | Owned Brokerage Group |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 61 |  |
Amount incurred to date |  | 45 |  |
Total amount remaining to be incurred |  | 16 |  |
Operational Efficiencies Program | Title Group |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 5 |  |
Amount incurred to date |  | 4 |  |
Total amount remaining to be incurred |  | 1 |  |
Prior restructuring programs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2023 |  | 9 |  |
Restructuring costs, net |  | 1 |  | 2
Costs paid or otherwise settled |  | (2) |  |
Balance at March 31, 2024 |  | 8 |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount remaining to be incurred |  | 19 |  |
Personnel Related |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring costs, net | [4] | 5 |  | 11
Personnel Related | Operational Efficiencies Program |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2023 |  | 10 |  |
Restructuring costs, net | [3] | 5 |  |
Costs paid or otherwise settled |  | (4) |  |
Balance at March 31, 2024 |  | 11 |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 42 |  |
Amount incurred to date |  | 40 |  |
Total amount remaining to be incurred |  | 2 |  |
Facility Related |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring costs, net | [5] | 6 |  | $ 14
Facility Related | Operational Efficiencies Program |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2023 |  | 4 |  |
Restructuring costs, net | [3] | 5 |  |
Costs paid or otherwise settled |  | (4) |  |
Balance at March 31, 2024 |  | 5 |  |
Other Asset Impairment Charges |  | 5 |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |
Total amount expected to be incurred |  | 48 |  |
Amount incurred to date |  | 33 |  |
Total amount remaining to be incurred |  | $ 15 |  |
[1] | (b)The three months ended March 31, 2024 includes restructuring charges of $1 million at Franchise Group, $6 million at Owned Brokerage Group and $4 million at Corporate and Other. The three months ended March 31, 2023 includes restructuring charges of $6 million at Franchise Group, $14 million at Owned Brokerage Group and $5 million at Corporate and Other.
[2] | Restructuring charges for the three months ended March 31, 2024 include $10 million of expense related to the Operational Efficiencies Plan and $1 million of expense related to prior restructuring plans. Restructuring charges for the three months ended March 31, 2023 include $23 million of expense related to the Operational Efficiencies Plan and $2 million of expense related to prior restructuring plans.
[3] | In addition, the Company incurred $5 million of facility-related costs for lease asset impairments in connection with the Plan during the three months ended March 31, 2024.
[4] | Personnel-related costs consist of severance costs provided to employees who have been terminated.
[5] | Facility-related costs consist of costs associated with planned facility closures such as contract termination costs, amortization of lease assets that will continue to be incurred under the contract for its remaining term without economic benefit to the Company, accelerated depreciation on asset disposals and other facility and employee relocation related costs.

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