Transactions with Affiliates - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Related Party Transaction [Line Items]
Service related, net	$ 137	$ 317	$ 221	$ 781
New Residential
Related Party Transaction [Line Items]
Fees paid		52		105
Revenue recognized from servicing agreements		2		3
Agency MSRs | Subsidiary of New Residential | Loan Subservicing Agreement
Related Party Transaction [Line Items]
Service related, net		$ 18		$ 37