XML 74 R60.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Fair Value - Schedule of Significant Assumptions used in Valuation (Details) | Jun. 30, 2024 USD ($) year | Dec. 31, 2023 USD ($) year
--- | --- | ---
Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.094 | 0.094
Loans Held for Investment Reverse Mortgages | Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.052 | 0.049
Loans Held for Investment Reverse Mortgages | Minimum | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.7 | 0.8
Loans Held for Investment Reverse Mortgages | Minimum | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.116 | 0.120
Loans Held for Investment Reverse Mortgages | Maximum | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 7.9 | 7.9
Loans Held for Investment Reverse Mortgages | Maximum | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.329 | 0.354
Loans Held for Investment Reverse Mortgages | Weighted Average | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 5.1 | 5.2
Loans Held for Investment Reverse Mortgages | Weighted Average | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.177 | 0.172
Fair Value Agency Mortgage Servicing Rights | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.063 | 0.077
Fair Value Agency Mortgage Servicing Rights | Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.099 | 0.092
Fair Value Agency Mortgage Servicing Rights | Weighted average lifetime delinquency rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.012 | 0.013
Fair Value Agency Mortgage Servicing Rights | Weighted average cost to service (in dollars) |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | $ | 71 | 71
Fair Value Non-Agency Mortgage Servicing Rights | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.078 | 0.079
Fair Value Non-Agency Mortgage Servicing Rights | Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.109 | 0.114
Fair Value Non-Agency Mortgage Servicing Rights | Weighted average lifetime delinquency rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.101 | 0.100
Fair Value Non-Agency Mortgage Servicing Rights | Weighted average cost to service (in dollars) |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | $ | 192 | 192
HMBS - Related Borrowings | Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.052 | 0.049
HMBS - Related Borrowings | Minimum | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.7 | 0.8
HMBS - Related Borrowings | Minimum | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.116 | 0.120
HMBS - Related Borrowings | Maximum | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 7.9 | 7.9
HMBS - Related Borrowings | Maximum | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.329 | 0.354
HMBS - Related Borrowings | Weighted Average | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 5.1 | 5.2
HMBS - Related Borrowings | Weighted Average | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.177 | 0.172
Mortgage Servicing Rights Pledged | Life in years |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 4.7 | 4.3
Mortgage Servicing Rights Pledged | Weighted average prepayment speed |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.053 | 0.065
Mortgage Servicing Rights Pledged | Discount rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.104 | 0.096
Mortgage Servicing Rights Pledged | Weighted average lifetime delinquency rate |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | 0.030 | 0.028
Mortgage Servicing Rights Pledged | Weighted average cost to service (in dollars) |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Measurement input | $ | 134 | 130

X
- Definition Value of input used to measure alternative investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_AlternativeInvestmentMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=onit_LoansHeldforInvestmentReverseMortgagesMember
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: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
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: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=onit_FairValueAgencyMortgageServicingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=onit_MeasurementInputWeightedAverageCostToServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=onit_FairValueNonAgencyMortgageServicingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=onit_HMBSRelatedBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=onit_MortgageServicingRightsPledgedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |