XML 99 R71.htm IDEA: XBRL DOCUMENT v3.25.3

Reverse Mortgages - Schedule of Reverse Mortgage Revenue, Net (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Nov. 01, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Receivables [Abstract]
Acquisition	$ 2,900.0
Loans Held For Investment, Reverse Mortgages, Acquisitions, Cash Amount	20.0
Loans Held For Investment, Reverse Mortgages, UPB	$ 14.2
Gain on new originations		$ 5.4	$ 5.5	$ 16.5	$ 16.5
Net interest income (servicing fee)		7.8	6.2	24.2	18.2
Other change in fair value of securitized loans held for investment and HMBS-related borrowings, net		(1.2)	5.7	5.3	5.0
Change in fair value included in earnings, net		12.0	17.3	45.9	39.7
Loan fees and other		1.0	0.7	2.8	2.2
Gain on reverse loans held for investment and HMBS-related borrowings, net		13.0	18.0	48.7	41.9
Change in fair value		178.6	162.4	553.1	496.8
Change in fair value		$ (166.5)	$ (145.0)	$ (507.2)	$ (457.1)

X

- Definition

Fee and Commissions, Reverse Mortgage Banking

+ References

No definition available.

+ Details

Name:	onit_FeeandCommissionsReverseMortgageBanking
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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:	onit_HMBSRelatedBorrowingsChangeInFairValue
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Loands Held For Investment, Reverse Mortgage, Other Change In Fair Value

+ References

No definition available.

+ Details

Name:	onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Loans held for investment, reverse mortgages, acquisitions.

+ References

No definition available.

+ Details

Name:	onit_LoansHeldForInvestmentReverseMortgagesAcquisitions
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Loans Held For Investment, Reverse Mortgages, Acquisitions, Cash Amount

+ References

No definition available.

+ Details

Name:	onit_LoansHeldForInvestmentReverseMortgagesAcquisitionsCashAmount
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Loans Held For Investment, Reverse Mortgages, UPB

+ References

No definition available.

+ Details

Name:	onit_LoansHeldForInvestmentReverseMortgagesUPB
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Net interest income (servicing fee) - Reverse mortgages

+ References

No definition available.

+ Details

Name:	onit_NetInterestIncomeServicingFee
Namespace Prefix:	onit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

A gain (loss) realized on a transfer, accounted for as a sale, of all or a portion of financial assets in which the transferor surrenders control and receives consideration other than a beneficial interest in the assets transferred. Reflects the amount of sales proceeds in excess of, or deficient from, the sum of the carrying amounts of transferred financial assets plus transaction costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(9)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Name:	us-gaap_GainLossOnSecuritizationOfFinancialAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of interest and fee income from loans classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Name:	us-gaap_InterestAndFeeIncomeOtherLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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