Reverse Mortgages - Schedule of Loans Held For Investment and HMBS Related Borrowings (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Loans Held for Investment - Reverse Mortgages
Beginning balance	$ 7,504.1	$ 7,199.8
Originations	235.3	620.2
Acquisition	0.0	211.3
Repayments (principal payments received)	(235.6)	(518.8)
Loans held for sale, at fair value	(1.6)	(3.2)
Receivables, net	(0.9)	(12.5)
Other assets	0.0	(0.1)
Change in fair value	161.5	(45.1)
Securitized loans (pledged to HMBS-Related Borrowings)	7,545.2	7,202.0
Unsecuritized loans	117.6	249.5
Ending balance	7,662.8	7,451.6
HMBS Related Borrowings
Beginning balance	(7,326.8)	(6,885.0)
Securitization of HECM loans accounted for as a financing (including realized fair value changes)	(231.2)	(583.9)
Additional proceeds from securitization of HECM loans and tails	(6.4)	(12.2)
Acquisition	0.0	(209.1)
Repayments (principal payments received)	235.3	517.4
Change in fair value	(141.5)	54.0
Ending balance	(7,470.6)	(7,118.8)
Securitized loans (pledged to HMBS-related borrowings)	$ (7,470.6)	$ (7,118.8)

HMBS related borrowings, acquisitions.

No definition available.

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- Definition

Amounts related to additional proceeds from securitization of loans and tails of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

+ References

No definition available.

+ Details

Name:	ocn_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Change in fair value related to home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

+ References

No definition available.

+ Details

Name:	ocn_HMBSRelatedBorrowingsChangeInFairValue
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Principal repayment in connection with home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

+ References

No definition available.

+ Details

Name:	ocn_HMBSRelatedBorrowingsRepayments
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amounts related to securitization of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

+ References

No definition available.

+ Details

Name:	ocn_HMBSRelatedBorrowingsSecuritization
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This represents the amount of liability which is a resultant of reverse mortgage loans sold into the secondary with servicing rights retained. As the transfer of these loans do not meet the definition of participating interest because of the servicing requirement that requires the issuer to absorb some level of risk, these transfers are accounted for as financing.

+ References

No definition available.

+ Details

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

- Definition

Loans held for investment, reverse mortgages.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgages
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Loans held for investment, reverse mortgages, acquisitions.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesAcquisitions
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Change in fair value of loans held for investment, reverse mortgages during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesFairValueChanges
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of loans held for investment, reverse mortgages transferred to loans held for sale, fair value during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of loans held for investment, reverse mortgages originated during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesOriginations
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of loans held for investment, reverse mortgages transferred to real estate owned during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesRealEstateOwned
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of loans held for investment, reverse mortgages transferred to receivables during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesReceivablesNet
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Principal payments received on loans held for investment during the period.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesRepayments
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of securitized loans held for investment, reverse mortgages.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesSecuritizedLoans
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of un securitized loans held for investment, reverse mortgages.

+ References

No definition available.

+ Details

Name:	ocn_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

This is the principal amount outstanding for securitized loans only (across all types of loans).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719

+ Details

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