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Commitments - Schedule of Activity Related to HMBS Repurchases (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | $ 7,488.1 |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 178.4 |
Additions, repurchase securities, amount | 224.9 | $ 154.3
Recoveries, net, repurchase securities, amount | (230.1) |
Transfers, repurchase securities, amount | 0.0 |
Change in value, repurchase securities, amount | (3.2) |
Ending balance, repurchase securities, amount | 170.0 |
Maximum Claim Amount, Less Than 92% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 7,053.3 |
Maximum Claim Amount, Greater than 92% and Less Than 95% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 211.9 |
Maximum Claim Amount, Greater than 95% and less Than 98% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 222.9 |
Active |  |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 70.7 |
Additions, repurchase securities, amount | 159.3 |
Recoveries, net, repurchase securities, amount | (187.9) |
Transfers, repurchase securities, amount | 3.8 |
Change in value, repurchase securities, amount | 0.3 |
Ending balance, repurchase securities, amount | 46.2 |
Inactive |  |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 107.7 |
Additions, repurchase securities, amount | 65.6 |
Recoveries, net, repurchase securities, amount | (42.2) |
Transfers, repurchase securities, amount | (3.8) |
Change in value, repurchase securities, amount | (3.4) |
Ending balance, repurchase securities, amount | $ 123.9 |

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- Definition This represents the amount of additions to HMBS repurchase securities. + References No definition available. + Details
Name: | ocn_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This represents the amount of change in value of HMBS repurchase securities. + References No definition available. + Details
Name: | ocn_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This represents the amount of HMBS repurchase securities outstanding. + References No definition available. + Details
Name: | ocn_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-term Purchase Commitment + References No definition available. + Details
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Namespace Prefix: | ocn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This represents the amount of recoveries related to HMBS repurchase securities. + References No definition available. + Details
Name: | ocn_RecoveriesRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Securitized Home Equity Conversion Mortgage-Backed Security + References No definition available. + Details
Name: | ocn_SecuritizedHomeEquityConversionMortgageBackedSecurity
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This represents the amount of transfers related to HMBS repurchase securities. + References No definition available. + Details
Name: | ocn_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue
Namespace Prefix: | ocn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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- Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
Period Type: |