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Commitments - Schedule of Activity Related to HMBS Repurchases (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | $ 7,368.7 |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 178.4 |
Additions, repurchase securities, amount | 181.3 | $ 96.6
Recoveries, net, repurchase securities, amount | (164.8) |
Transfers, repurchase securities, amount | 0.0 |
Change in value, repurchase securities, amount | (2.2) |
Ending balance, repurchase securities, amount | 192.8 |
Maximum Claim Amount, Less Than 92% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 6,998.9 |
Maximum Claim Amount, Greater than 92% and Less Than 95% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 194.1 |
Maximum Claim Amount, Greater than 95% and less Than 98% |  |
Long-term Purchase Commitment [Line Items] |  |
Securitized Home Equity Conversion Mortgage-Backed Security | 175.6 |
Active |  |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 70.7 |
Additions, repurchase securities, amount | 133.7 |
Recoveries, net, repurchase securities, amount | (137.9) |
Transfers, repurchase securities, amount | (0.6) |
Change in value, repurchase securities, amount | 0.1 |
Ending balance, repurchase securities, amount | 66.0 |
Inactive |  |
Long-term Purchase Commitment [Roll Forward] |  |
Beginning balance, repurchase securities, amount | 107.7 |
Additions, repurchase securities, amount | 47.6 |
Recoveries, net, repurchase securities, amount | (26.9) |
Transfers, repurchase securities, amount | 0.6 |
Change in value, repurchase securities, amount | (2.2) |
Ending balance, repurchase securities, amount | $ 126.9 |

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- Definition This represents the amount of additions to HMBS repurchase securities. + References No definition available. + Details
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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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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
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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
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Data Type: | xbrli:stringItemType
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- Details
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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: |