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Note 11. Restructuring Costs Restructuring Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net | $ 3 | $ 2 | $ 2 | $ 5 | $ 9 | $ 9 | $ 12 | $ 9 |  | $ 12 |  | $ 39 |  | $ 10 |
Real Estate Franchise Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
Company Owned Real Estate Brokerage Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  | 9 |  | 22 |  | 5 |
Relocation Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  | 4 |  | 1 |
Title and Settlement Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  | 1 |  | 1 |  |  |
Business Optimization Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at October 1, 2015 |  |  |  | 16 |  |  |  | 9 | $ 0 | 16 |  | 9 |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  | 10 | 12 |  | 39 |  | 10 |
Costs paid or otherwise settled |  |  |  |  |  |  |  |  | (1) | (21) |  | (32) |  |  |
Balance at December 31, 2017 | 7 |  |  |  | 16 |  |  |  | 9 | 7 |  | 16 |  | 9 |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 63 |  |  |  |  |  |  |  |  | 63 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 61 |  |  |  |  |
Total amount remaining to be incurred | 2 |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Business Optimization Plan [Member] | Real Estate Franchise Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 5 |  |  |  |  |  |  |  |  | 5 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Business Optimization Plan [Member] | Company Owned Real Estate Brokerage Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 36 |  |  |  |  |  |  |  |  | 36 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 36 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Business Optimization Plan [Member] | Relocation Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 5 |  |  |  |  |  |  |  |  | 5 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Business Optimization Plan [Member] | Title and Settlement Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 2 |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Business Optimization Plan [Member] | Corporate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 15 |  |  |  |  |  |  |  |  | 15 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 13 |  |  |  |  |
Total amount remaining to be incurred | 2 |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Personnel-related costs | Business Optimization Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at October 1, 2015 |  |  |  | 9 |  |  |  | 3 | 0 | 9 |  | 3 |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  | 3 | 7 |  | 22 |  | 3 | [1]
Costs paid or otherwise settled |  |  |  |  |  |  |  |  | 0 | (13) |  | (16) |  |  |
Balance at December 31, 2017 | 3 |  |  |  | 9 |  |  |  | 3 | 3 |  | 9 |  | 3 |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 32 |  |  |  |  |  |  |  |  | 32 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 32 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Facility-related costs | Business Optimization Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at October 1, 2015 |  |  |  | 7 |  |  |  | 3 | 0 | 7 |  | 3 |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  | 3 | 3 |  | 10 |  | 3 | [2]
Costs paid or otherwise settled |  |  |  |  |  |  |  |  | 0 | (7) |  | (6) |  |  |
Balance at December 31, 2017 | 3 |  |  |  | 7 |  |  |  | 3 | 3 |  | 7 |  | 3 |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 16 |  |  |  |  |  |  |  |  | 16 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 16 |  |  |  |  |
Total amount remaining to be incurred | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Accelerated depreciation related to asset disposals | Business Optimization Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at October 1, 2015 |  |  |  | 0 |  |  |  | 0 | 0 | 0 |  | 0 |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  | 0 | 1 |  | 1 |  | 0 |
Costs paid or otherwise settled |  |  |  |  |  |  |  |  | 0 | 0 |  | (1) |  |  |
Balance at December 31, 2017 | 1 |  |  |  | 0 |  |  |  | 0 | 1 |  | 0 |  | 0 |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 3 |  |  |  |  |  |  |  |  | 3 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Total amount remaining to be incurred | 1 |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
Other restructuring costs | Business Optimization Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at October 1, 2015 |  |  |  | $ 0 |  |  |  | $ 3 | 0 | 0 |  | 3 |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  | 4 | 1 | [3] | 6 | [3] | 4 | [3]
Costs paid or otherwise settled |  |  |  |  |  |  |  |  | (1) | (1) |  | (9) |  |  |
Balance at December 31, 2017 | 0 |  |  |  | $ 0 |  |  |  | $ 3 | 0 |  | $ 0 |  | $ 3 |
Restructuring and Related Cost, Expected Cost [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total amount expected to be incurred | 12 |  |  |  |  |  |  |  |  | 12 |  |  |  |  |
Amount incurred to date |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |
Total amount remaining to be incurred | $ 1 |  |  |  |  |  |  |  |  | $ 1 |  |  |  |  |
[1] | Personnel-related costs consist of severance costs provided to employees who have been terminated and duplicate payroll costs during transition.
[2] | Facility-related costs consist of costs associated with planned facility closures such as contract termination costs, lease payments that will continue to be incurred under the contract for its remaining term without economic benefit to the Company and other facility and employee relocation related costs.
[3] | Other restructuring costs consist of costs related to professional fees, consulting fees and other costs associated with restructuring activities which are primarily included in the Corporate and Other business segment.

X
- 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 No definition available. + Details
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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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