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Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 1,370 |  | $ 1,644 |  | $ 1,662 |  | $ 1,134 |  | $ 1,325 |  | $ 1,668 |  | $ 1,651 |  | $ 1,062 |  | $ 5,810 |  | $ 5,706 |  | $ 5,328 |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | 86 |  | 176 |  | 153 |  | (66) |  | 1 |  | 182 |  | 157 |  | (58) |  | 349 |  | 282 |  | 225 |
Net income (loss) attributable to Realogy Holdings and Realogy Group | $ 57 |  | $ 106 |  | $ 92 |  | $ (42) |  | $ 9 |  | $ 110 |  | $ 97 |  | $ (32) |  | $ 213 |  | $ 184 |  | $ 143 |
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share | $ 0.40 | [1] | $ 0.74 | [1] | $ 0.63 | [1] | $ (0.29) | [1] | $ 0.06 | [2] | $ 0.75 | [2] | $ 0.66 | [2] | $ (0.22) | [2] | $ 1.47 |  | $ 1.26 |  | $ 0.98 |
Diluted earnings per share | $ 0.40 | [1] | $ 0.73 | [1] | $ 0.63 | [1] | $ (0.29) | [1] | $ 0.06 | [2] | $ 0.74 | [2] | $ 0.66 | [2] | $ (0.22) | [2] | $ 1.46 |  | $ 1.24 |  | $ 0.97 |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Former parent legacy benefit, net | $ (3) |  |  |  |  |  | $ 1 |  |  |  | $ (14) |  | $ (1) |  |  |  | $ (2) |  | $ (15) |  | $ (10) |
Restructuring costs, net | 9 |  | $ 9 |  | $ 12 |  | 9 |  | $ 10 |  |  |  |  |  |  |  | 39 |  | 10 |  | (1) |
Loss on the early extinguishment of debt |  |  |  |  |  |  |  |  | 48 |  |  |  |  |  |  |  | 0 |  | 48 |  | 47 |
Real Estate Franchise Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 188 |  | 215 |  | 221 |  | 157 |  | 177 |  | 214 |  | 213 |  | $ 151 |  | 781 | [3],[4] | 755 | [3],[4] | 716 | [3],[4]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | 102 | [5] | 133 | [5] | 130 | [5] | 73 | [5] | 92 | [6] | 133 | [6] | 127 | [6] | 67 | [6] |  |  |  |  |  |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |
Company Owned Real Estate Brokerage Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 1,004 |  | 1,231 |  | 1,268 |  | 841 |  | 992 |  | 1,267 |  | 1,289 |  | 796 |  | 4,344 | [3],[4] | 4,344 | [3],[4] | 4,078 | [3],[4]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | (8) | [5] | 55 | [5] | 63 | [5] | (32) | [5] | 8 | [6] | 82 | [6] | 75 | [6] | (28) | [6] |  |  |  |  |  |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22 |  | 5 |  |  |
Relocation Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 97 |  | 116 |  | 109 |  | 83 |  | 98 |  | 124 |  | 108 |  | 85 |  | 405 | [3],[4] | 415 | [3],[4] | 419 | [3],[4]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | 16 | [5] | 34 | [5] | 22 | [5] | (1) | [5] | 16 | [6] | 39 | [6] | 22 | [6] | (1) | [6] |  |  |  |  |  |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  | 1 |  |  |
Title and Settlement Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | 149 |  | 164 |  | 149 |  | 111 |  | 125 |  | 147 |  | 128 |  | 87 |  | 573 | [3],[4] | 487 | [3],[4] | 398 | [3],[4]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | 6 | [5] | 17 | [5] | 21 | [5] | (5) | [5] | 5 | [6] | 9 | [6] | 16 | [6] | (7) | [6] |  |  |  |  |  |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues | (68) | [7] | (82) | [7] | (85) | [7] | (58) | [7] | (67) | [8] | (84) | [8] | (87) | [8] | (57) | [8] | (293) | [3],[4],[9] | (295) | [3],[4],[9] | $ (283) | [3],[4],[9]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes, equity in earnings and noncontrolling interests (b) | $ (30) | [5] | $ (63) | [5] | $ (83) | [5] | $ (101) | [5] | $ (120) | [6] | $ (81) | [6] | $ (83) | [6] | $ (89) | [6] |  |  |  |  |  |
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8 |  | $ 4 |  |  |
[1] | Basic and diluted EPS amounts in each quarter are computed using the weighted-average number of shares outstanding during that quarter, while basic and diluted EPS for the full year is computed using the weighted-average number of shares outstanding during the year. Therefore, the sum of the four quarters’ basic or diluted EPS may not equal the full year basic or diluted EPS (see Note 16 "Earnings Per Share" for further information).
[2] | Basic and diluted EPS amounts in each quarter are computed using the weighted-average number of shares outstanding during that quarter, while basic and diluted EPS for the full year is computed using the weighted-average number of shares outstanding during the year. Therefore, the sum of the four quarters’ basic or diluted EPS may not equal the full year basic or diluted EPS.
[3] | Revenues for the Relocation Services segment include intercompany referral commissions paid by the Company Owned Real Estate Brokerage Services segment of $43 million for the year ended December 31, 2016, $49 million for the year ended December 31, 2015 and $42 million for the year ended December 31, 2014. Such amounts are recorded as contra-revenues by the Company Owned Real Estate Brokerage Services segment. There are no other material intersegment transactions.
[4] | 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 $293 million for the year ended December 31, 2016, $295 million for the year ended December 31, 2015 and $283 million for the year ended December 31, 2014. Such amounts are eliminated through the Corporate and Other line.
[5] | The quarterly results include the following: •former parent legacy cost of $1 million in the first quarter and former parent legacy benefit of $3 million in the fourth quarter; and•restructuring charges of $9 million, $12 million, $9 million and $9 million in the first, second, third and fourth quarters, respectively.
[6] | The quarterly results include the following: •a loss on the early extinguishment of debt of $48 million in the fourth quarter;•former parent legacy benefit of $1 million and $14 million in the second and third quarters, respectively; and•restructuring charges of $10 million in the fourth quarter.
[7] | Represents the elimination of transactions primarily between the Real Estate Franchise Services segment and the Company Owned Real Estate Brokerage Services segment.
[8] | Represents the elimination of transactions primarily between the Real Estate Franchise Services segment and the Company Owned Real Estate Brokerage Services segment.
[9] | Includes the elimination of transactions between segments.

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