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Commitments - Estimated Monthly Principal & Interest Advances (Footnote) (Details)	9 Months Ended
	Sep. 30, 2020
Other Commitments [Line Items]
Advance reimbursement period	30 days
New Residential Investment Corp
Other Commitments [Line Items]
Advance reimbursement period	3 days
New Residential Investment Corp | Minimum
Other Commitments [Line Items]
Advance reimbursement period	1 day
New Residential Investment Corp | Maximum
Other Commitments [Line Items]
Advance reimbursement period	30 days

X

- Definition

Advance reimbursement period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ocn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: