Commitments and Contingencies (Residential Whole Loan Purchase Commitments) (Details) $ in Millions	Jun. 30, 2021 USD ($)
Other Commitments [Line Items]
Unsettled residential whole loans	$ 131.3

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.

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