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Restructuring Costs Restructuring Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring costs, net | [1] | $ 4 | $ 17 | $ 14 | $ 47
Personnel Related |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring costs, net | [2] | 1 | 5 | 5 | 13
Facility Related |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring costs, net | [3] | $ 3 | $ 12 | $ 9 | $ 34
[1] | The three months ended September 30, 2021 includes restructuring charges of $1 million at Realogy Franchise Group, $2 million at Realogy Brokerage Group and $1 million at Corporate and Other. The three months ended September 30, 2020 includes restructuring charges of $4 million at Realogy Franchise Group, $11 million at Realogy Brokerage Group and $2 million at Corporate and Other. The nine months ended September 30, 2021 includes restructuring charges of $4 million at Realogy Franchise Group, $6 million at Realogy Brokerage Group and $4 million at Corporate and Other. The nine months ended September 30, 2020 includes restructuring charges of $10 million at Realogy Franchise Group, $32 million at Realogy Brokerage Group, $3 million at Realogy Title Group and $2 million at Corporate and Other.
[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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