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Rights to MSRs - Schedule of Assets, Liabilities, Servicing and Subservicing Fees Related to NRZ Agreements (Footnote) (Details)
$ in Millions
3 Months Ended
Jun. 30, 2020
USD ($)
Forecast  
Servicing Liabilities at Fair Value [Line Items]  
Reduction in the financing liability and interest expense $ 10.0