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Note 2. Summary of Significant Accounting Policies Derivative Instruments (Details) - Interest rate swap contracts
$ in Millions

Dec. 31, 2017

USD ($)

Derivative [Line Items]

Notional value of derivative instrument

$ 1,475

July 2012

Derivative [Line Items]

Notional value of derivative instrument

225

^[1],[2]

January 2013

Derivative [Line Items]

Notional value of derivative instrument

200

^[1],[2]

August 2015

Derivative [Line Items]

Notional value of derivative instrument

600

November 2017

Derivative [Line Items]

Notional value of derivative instrument

450

^[1],[2]

July 2012 and January 2013

Derivative [Line Items]

Notional value of derivative instrument

$ 425

[1]	(a)Interest rates swaps with a notional value of $425 million expired February 10, 2018, and interest rate swaps with a notional value of $450 million commenced in the fourth quarter of 2017.
[2]	Interest rates swaps with a notional value of $425 million expired February 10, 2018, and interest rate swaps with a notional value of $450 million commenced in the fourth quarter of 2017.

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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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.

+ Details

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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

Name:	rlgy_SwapCommencementDateAxis=rlgy_July2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	rlgy_SwapCommencementDateAxis=rlgy_January2013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	rlgy_SwapCommencementDateAxis=rlgy_August2015Member
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	rlgy_SwapCommencementDateAxis=rlgy_November2017Member
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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