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Securitizations and Financings - Assets and Liabilities of Consolidated VIEs (Details) - Residential mortgage - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets - transfers accounted for as secured borrowings | $ 458 | $ 476
Liabilities - transfers accounted for as secured borrowings | 307 | 322
Restricted cash |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets - transfers accounted for as secured borrowings | 92 | 78
Advances and other receivables, net |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets - transfers accounted for as secured borrowings | 366 | 398
Advance facilities, net(1) |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Liabilities - transfers accounted for as secured borrowings | 306 | 321
Payables and other liabilities |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Liabilities - transfers accounted for as secured borrowings | $ 1 | $ 1

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