Loans Held for Investment - Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2023	Dec. 31, 2022
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Securitized debt loans held for investment at cost	$ 12,400,000,000	$ 11,900,000,000
Loans held for investment
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Unpaid principal balance	12,570,243,000	12,060,631,000
Seasoned Subprime Residential Mortgage Loans \| Fair Value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
90+ days delinquent	653,000,000	717,000,000
Loans Held for Investment at Fair Value
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
Retained balance	$ 0	$ 0

Residential mortgage loans in the securitized loan portfolio that are 90 or more days past due.

No definition available.

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- Definition

Loans On Residential Real Estate held For Investment, Principal Amount

+ References

No definition available.

+ Details

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- Definition

Secured financing obligations carried at cost as of the reporting date consisting of securitizations that are collateralized by residential adjustable or fixed rate mortgage loans that have been placed in a trust and pay interest and principal to the debt holders of that securitization.

+ References

No definition available.

+ Details

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- Definition

Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]

+ References

No definition available.

+ Details

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- Definition

Amount of beneficial interest received as consideration for transferring noncash financial asset. Includes, but is not limited to, trade receivable in securitization transaction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482913/230-10-50-4

+ Details

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- Details

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- Details

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- Details

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- Details

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