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Segment Information - Revenues (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2018

Mar. 31, 2017

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

$ 1,229

$ 1,203

^[3]

Real Estate Franchise Services

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

176

170

^[3]

Real Estate Franchise Services | Royalties and Marketing Fees

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

63

61

Company Owned Real Estate Brokerage Services

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

917

897

^[3]

Relocation Services

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

79

77

^[3]

Relocation Services | Referral and Relocation Fees

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

8

8

Title and Settlement Services

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

120

120

^[3]

Corporate and Other

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2],[4]

$ (63)

$ (61)

^[3]

[1]	Revenues for the Relocation Services segment include intercompany referral commissions paid by the Company Owned Real Estate Brokerage Services segment of $8 million for both the three months ended March 31, 2018 and 2017. 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 $63 million and $61 million for the three months ended March 31, 2018 and 2017, respectively. Such amounts are eliminated through the Corporate and Other line.
[3]	Prior period amounts have not been adjusted under the modified retrospective method.
[4]	Includes the elimination of transactions between segments.

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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