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Securitizations and Financings - Assets and Liabilities of Consolidated VIEs (Details) - Residential Mortgage - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers accounted for as secured borrowings, assets | $ 437 | $ 488
Transfers accounted for as secured borrowings, liabilities | 323 | 359
Restricted cash |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers accounted for as secured borrowings, assets | 50 | 47
Advances and other receivables, net |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers accounted for as secured borrowings, assets | 387 | 441
Advance facilities(1) |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers accounted for as secured borrowings, liabilities | 322 | 358
Payables and other liabilities |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers accounted for as secured borrowings, liabilities | $ 1 | $ 1

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