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Restructuring Costs Restructuring Costs (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs, net | [1] | $ 5 | $ 12
Personnel Related |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs, net | [2] | 2 | 3
Facility Related |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs, net | [3] | $ 3 | $ 9
[1] | The three months ended March 31, 2021 includes restructuring charges of $2 million at Realogy Franchise Group, $2 million at Realogy Brokerage Group and $1 million at Corporate and Other.The three months ended March 31, 2020 includes restructuring charges of $2 million at Realogy Franchise Group, $9 million at Realogy Brokerage Group and $1 million at Realogy Title Group.
[2] | Personnel-related costs consist of severance costs provided to employees who have been terminated and duplicate payroll costs during transition.
[3] | 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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