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Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
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, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 1,444 |  | $ 1,674 |  | $ 1,793 |  | $ 1,203 |  | $ 1,370 |  | $ 1,644 |  | $ 1,662 |  | $ 1,134 |  | $ 6,114 | [1],[2] | $ 5,810 | [1],[2] | $ 5,706 | [1],[2]
Real Estate Franchise Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 199 |  | 224 |  | 237 |  | 170 |  | 188 |  | 215 |  | 221 |  | 157 |  | 830 | [1],[2] | 781 | [1],[2] | 755 | [1],[2]
Real Estate Franchise Services | Royalties and Marketing Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 311 |  | 293 |  | 295 |
Company Owned Real Estate Brokerage Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 1,087 |  | 1,267 |  | 1,392 |  | 897 |  | 1,004 |  | 1,231 |  | 1,268 |  | 841 |  | 4,643 | [1],[2] | 4,344 | [1],[2] | 4,344 | [1],[2]
Relocation Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 92 |  | 111 |  | 102 |  | 77 |  | 97 |  | 116 |  | 109 |  | 83 |  | 382 | [1],[2] | 405 | [1],[2] | 415 | [1],[2]
Relocation Services | Referral and Relocation Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40 |  | 43 |  | 49 |
Title and Settlement Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 139 |  | 154 |  | 157 |  | 120 |  | 149 |  | 164 |  | 149 |  | 111 |  | 570 | [1],[2] | 573 | [1],[2] | 487 | [1],[2]
Corporate and Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ (73) | [3] | $ (82) | [3] | $ (95) | [3] | $ (61) | [3] | $ (68) | [4] | $ (82) | [4] | $ (85) | [4] | $ (58) | [4] | $ (311) | [1],[2],[5] | $ (293) | [1],[2],[5] | $ (295) | [1],[2],[5]
[1] | Revenues for the Relocation Services segment include intercompany referral commissions paid by the Company Owned Real Estate Brokerage Services segment of $40 million, $43 million and $49 million for the years ended December 31, 2017, 2016 and 2015, respectively. Such amounts are recorded as contra-revenues by the Company Owned Real Estate Brokerage Services segment. There are no other material intersegment transactions.
[2] | Transactions between segments are eliminated in consolidation. Revenues for the Real Estate Franchise Services segment include intercompany royalties and marketing fees paid by the Company Owned Real Estate Brokerage Services segment of $311 million, $293 million and $295 million for the years ended December 31, 2017, 2016 and 2015, respectively. Such amounts are eliminated through the Corporate and Other line.
[3] | Represents the elimination of transactions primarily between the Real Estate Franchise Services segment and the Company Owned Real Estate Brokerage Services segment.
[4] | Represents the elimination of transactions primarily between the Real Estate Franchise Services segment and the Company Owned Real Estate Brokerage Services segment.
[5] | Includes the elimination of transactions between segments.

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