Name:	rlgy_AdditionalCreditFacilities
Namespace Prefix:	rlgy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Annual percentage of the original principal amount for which quarterly amortization payments are made.

No definition available.

Name:	rlgy_Annualpercentageoforiginalprincipalamountforquarterlyamortizationpayments
Namespace Prefix:	rlgy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Debt Maturity Term

No definition available.

Name:	rlgy_DebtMaturityTerm
Namespace Prefix:	rlgy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount before unamortized (discount) premium and debt issuance costs of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, classified as noncurrent.

No definition available.

Name:	rlgy_LongTermGross
Namespace Prefix:	rlgy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Ratio of Indebtedness to Net Capital Denominator

No definition available.

Name:	rlgy_RatioOfIndebtednessToNetCapitalDenominator
Namespace Prefix:	rlgy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Indebtedness divided by net capital.

No definition available.

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_DebtInstrumentAxis=rlgy_TermLoanAFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_DebtCovenantRatioAxis=rlgy_RequiredCovenantRatioToReceiveAdditionalCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_InterestRateTypeAxis=rlgy_LiborMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_SeniorSecuredLeverageRatioScenarioAxis=rlgy_Greaterthan3.50to1.00Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_SeniorSecuredLeverageRatioScenarioAxis=rlgy_Lessthanorequalto3.50to1.00butgreaterthanorequalto2.50to1.00Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_SeniorSecuredLeverageRatioScenarioAxis=rlgy_Lessthan2.50to1.00Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_InterestRateTypeAxis=rlgy_AbrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_QuarterlyAmortizationPaymentYearsAxis=rlgy_A2016Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_QuarterlyAmortizationPaymentYearsAxis=rlgy_A2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_QuarterlyAmortizationPaymentYearsAxis=rlgy_A2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	rlgy_QuarterlyAmortizationPaymentYearsAxis=rlgy_A2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: