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Mortgage Servicing - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Concentration Risk [Line Items]
UPB of loans acquired	$ 2,900.0	$ 4,900.0
UPB of MSRs sold	17.6	99.4
Float balances	$ 1,900.0	$ 1,800.0	$ 1,700.0
Servicing Portfolio | New Residential Investment Corp | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk (percent)	19.00%

X

- Definition

This represents the unpaid principal balance of loans for which servicing rights has been acquired during the period.

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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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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The fair value of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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- Definition

Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from sale.

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