Commitments - Estimated Monthly Principal & Interest Advances (Details) $ in Millions	Sep. 30, 2020 USD ($) Borrower	Jun. 30, 2020 USD ($) Borrower
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	106,300	131,400
Number of borrowers requesting forbearance plan, no advance requirements	3,400	5,400
Estimate of liability \| $	$ 107.4	$ 135.9
Servicer
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	29,900	34,500
Estimate of liability \| $	$ 36.7	$ 44.0
New Residential Investment Corp
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	65,000	83,900
Estimate of liability \| $	$ 60.9	$ 81.8
Ocwen Subservicer
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	8,000	7,600
Estimate of liability \| $	$ 9.8	$ 10.1
GSE Loans \| Servicer
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	5,300	6,600
Estimate of liability \| $	$ 6.5	$ 8.3
GSE Loans \| New Residential Investment Corp
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	900	10,100
Estimate of liability \| $	$ 0.9	$ 11.0
Ginnie Mae Loans \| Servicer
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	10,100	9,900
Estimate of liability \| $	$ 9.2	$ 9.2
PLS Loans \| Servicer
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	14,500	18,000
Estimate of liability \| $	$ 21.0	$ 26.5
PLS Loans \| New Residential Investment Corp
Unusual or Infrequent Item, or Both [Line Items]
Number of borrowers requesting forbearance plan	64,100	73,800
Estimate of liability \| $	$ 60.0	$ 70.8