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

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1]

$ 1,547

$ 1,168

Realogy Franchise Group

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1]

254

220

Realogy Franchise Group | Royalties and Marketing Fees

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

79

58

Realogy Brokerage Group

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1]

1,171

869

Realogy Title Group

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1]

201

137

Corporate and Other

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

^[1],[2]

$ (79)

$ (58)

[1]	Transactions between segments are eliminated in consolidation. Revenues for the Realogy Franchise Group include intercompany royalties and marketing fees paid by Realogy Brokerage Group of $79 million and $58 million for the three months ended March 31, 2021 and 2020, respectively. Such amounts are eliminated through the Corporate and Other line.
[2]	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).

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