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Restructuring Costs Business Optimization Initiative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs, net | [1],[2] | $ 9 | $ 2 | $ 45 | $ 9 | [3] |
Business Optimization Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Reserve |  |  |  |  |  |  | $ 7
Restructuring costs, net |  | 0 |  |  |  |  |
Costs paid or otherwise settled |  |  |  | (6) |  |  |
Total amount remaining to be incurred |  | 3 |  | 3 |  |  |
Facility Related |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs, net | [4] | $ 3 | $ 0 | 15 | $ 1 |  |
Facility Related | Business Optimization Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs, net |  |  |  | $ 2 |  |  |
[1] | The three and nine months ended September 30, 2018 includes $9 million and $43 million, respectively, of expense related to the Leadership Realignment and Other Restructuring Activities program and zero and $2 million, respectively, of expense related to the Business Optimization Initiative program.
[2] | The three months ended September 30, 2018 includes restructuring charges of $1 million in the Real Estate Franchise Services and $8 million in the Company Owned Real Estate Brokerage Services segment.The three months ended September 30, 2017 includes restructuring charges of $2 million in the Company Owned Real Estate Brokerage Services segment.The nine months ended September 30, 2018 includes restructuring charges of $3 million in the Real Estate Franchise Services segment, $29 million in the Company Owned Real Estate Brokerage Services segment, $9 million in the Relocation Services segment, $2 million at Title and Settlement Services segment and $2 million in the Corporate and Other segment.The nine months ended September 30, 2017 includes restructuring charges of $1 million in the Real Estate Franchise Services segment and $8 million in the Company Owned Real Estate Brokerage Services segment.
[3] | Includes an $8 million expense related to the settlement of the Strader legal matter in Corporate and Other.
[4] | Facility-related costs consist of costs associated with planned facility closures such as contract termination costs, lease payments, net of applicable sublease income, 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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- Definition The increase (decrease) during the period in the carrying amount (including both current and noncurrent portions of the accrual) of the liability pertaining to the exit from or disposal of business activities or restructuring pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination and to asset retirement obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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