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Borrowings - Schedule of Financing Liabilities (Footnote) (Details) - USD ($) $ in Millions	1 Months Ended		6 Months Ended	12 Months Ended
	Jan. 31, 2018	Sep. 30, 2017	Jun. 30, 2020	Dec. 31, 2019
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			0.16%	1.76%
London Interbank Offered Rate (LIBOR) | Financing Liability Owed to Securitization Investors
Debt Instrument [Line Items]
Weighted average interest rate			0.45%
Minimum | Residential Asset Securitization Trust
Debt Instrument [Line Items]
Weighted average interest rate			4.25%
Maximum | Residential Asset Securitization Trust
Debt Instrument [Line Items]
Weighted average interest rate			5.75%
Two Thousand Seventeen Agreements | Financing liability – MSRs pledged
Debt Instrument [Line Items]
Receipt of lump sum payment in connection with transfer of MSRs to NRZ	$ 279.6	$ 54.6

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- Definition

Restructuring fee received in connection with transfer of mortgage servicing rights.

+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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