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Contingencies - Narrative (Details) $ in Millions		9 Months Ended
	Apr. 20, 2017 States	Sep. 30, 2021 USD ($) Loan States	Sep. 30, 2020 USD ($) Loan
Loss Contingencies [Line Items]
Accrued penalty		$ 44.6
Number of states charging with regulatory action | States	29
Warranty repurchase demands unpaid principal balance		$ 59.6	$ 45.2
Warranty repurchase demands number of loans | Loan		301	263
PHH Corporation
Loss Contingencies [Line Items]
Accrued penalty		$ 2.5
Multistate Mortgage Committee
Loss Contingencies [Line Items]
Number of states who are part of confidential supervisory memorandum of understanding | States		6

X

- Definition

This represents the number of states which have taken regulatory action, alleging breaches of various laws, regulations and licensing requirements, including those related to escrow administration and proper licensing of business activities.

+ References

No definition available.

+ Details

Name:	ocn_NumberOfStatesChargingWithRegulatoryAction
Namespace Prefix:	ocn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of states which are part of confidential supervisory memorandum of understanding.

+ References

No definition available.

+ Details

Name:	ocn_NumberOfStatesWhoArePartOfConfidentialSupervisoryMemorandumOfUnderstanding
Namespace Prefix:	ocn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of loans related to outstanding representation and warranty repurchase demands as of the end of the period.

+ References

No definition available.

+ Details

Name:	ocn_WarrantyRepurchaseDemandsNumberOfLoans
Namespace Prefix:	ocn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents unpaid principal balance related to outstanding representation and warranty repurchase demands as of the end of the period.

+ References

No definition available.

+ Details

Name:	ocn_WarrantyRepurchaseDemandsUnpaidPrincipalBalance
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

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

X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=ocn_PHHCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RegulatoryAgencyAxis=ocn_MultistateMortgageCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: