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Note 3. Acquisitions Acquisitions (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2014 USD ($) Offices | Dec. 31, 2016 USD ($) real_estate_brokerage_operations | Dec. 31, 2015 USD ($) real_estate_brokerage_operations | Dec. 31, 2014 USD ($) real_estate_brokerage_operations
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired |  | $ 72 | $ 141 | $ 142
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 |  | $ 20 | $ 47 | $ 5
Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | real_estate_brokerage_operations |  | 1 | 3 | 3
Cash consideration paid for acquisition |  | $ 24 | $ 34 | $ 6
Liabilities established related to acquisition |  | 10 | 37 |
Goodwill acquired |  | 20 | 47 | 5
Other Assets Acquired |  | 6 | 1 |
Other Liabilities Acquired |  | 9 |  |
Company Owned Real Estate Brokerage Services |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired |  | $ 52 | $ 94 | $ 86
Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | real_estate_brokerage_operations |  | 11 | 13 | 16
Cash consideration paid for acquisition |  | $ 74 | $ 96 | $ 44
Liabilities established related to acquisition |  | 9 | 13 | 19
Goodwill acquired |  | 52 | 94 | 45
Other Assets Acquired |  | 5 | 7 | 3
Other Liabilities Acquired |  | $ 3 | 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 |  | $ 5 | 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 |  | 6 | 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 |  | 2 | 5 |
Amortizable—Other (g) | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 3 | 1 | 8
Amortizable—Customer relationships (d) | Zip Realty [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired | $ 1 |  |  |
Amortizable—Customer relationships (d) | Company Owned Real Estate Brokerage Services | NRT Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 20 |  |
Unamortizable—Trademarks (b) | Title and Settlement Services | TRG Business Combinations [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived Intangible Assets Acquired |  | 3 | 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 |  | $ 7 | $ 1 |

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