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Note 3. Acquisitions Acquisitions (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2014 USD ($) Offices | Dec. 31, 2015 USD ($) real_estate_brokerage_operations | Dec. 31, 2014 USD ($) real_estate_brokerage_operations | Dec. 31, 2013 USD ($) real_estate_brokerage_operations
Business Acquisition [Line Items] |  |  |  |
Contingent consideration period |  | 4 years |  |
Goodwill acquired |  | $ 141 | $ 142 | $ 31
Zip Realty [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash consideration paid for acquisition | $ 167 |  |  |
Goodwill acquired | 92 |  |  |
Software and Fixed Assets Acquired | 18 |  |  |
Deferred Tax Assets Acquired | 46 |  |  |
Other Assets Acquired | 6 |  |  |
Other Liabilities Acquired | $ 6 |  |  |
Number Of Offices Acquired | Offices | 23 |  |  |
Title and Settlement Services |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired |  | $ 47 | $ 5 | 0
Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | real_estate_brokerage_operations |  | 3 | 3 |
Cash consideration paid for acquisition |  | $ 34 | $ 6 |
Liabilities established related to acquisition |  | 37 |  |
Goodwill acquired |  | 47 | 5 |
Other Assets Acquired |  | 1 |  |
Company Owned Real Estate Brokerage Services |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired |  | $ 94 | $ 86 | $ 31
Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | real_estate_brokerage_operations |  | 13 | 16 | 15
Cash consideration paid for acquisition |  | $ 96 | $ 44 | $ 32
Liabilities established related to acquisition |  | 13 | 19 | 4
Goodwill acquired |  | 94 | 45 | 31
Other Assets Acquired |  | 7 | 3 |
Other Liabilities Acquired |  | $ 3 | 1 |
Amortizable—Pendings and listings (f) |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Useful Life of Pendings and Listings |  | 5 months |  |
Amortizable—Pendings and listings (f) | Zip Realty [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired | $ 3 |  |  |
Amortizable—Pendings and listings (f) | Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | $ 8 | 1 |
Amortizable—Pendings and listings (f) | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 10 | 4 |
Amortizable—Other (g) | Zip Realty [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired | 7 |  |  |
Amortizable—Other (g) | Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 5 |  |
Amortizable—Other (g) | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 1 | 8 |
Amortizable—Customer relationships (d) | Zip Realty [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired | $ 1 |  |  |
Pendings and Listings and Other Intangibles [Member] [Member] | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  | $ 5
Unamortizable—Trademarks (b) | Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired |  | 9 |  |
Unamortizable—Trademarks (b) | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired |  |  | $ 4 |
Unamortizable—Title plant shares (e) | Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired |  | $ 1 |  |

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