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Amount of interest expense attributable to disposal group, including, but not limited to, discontinued operation.

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Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Dec. 01, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ 0.0	$ (12.0)	$ (2.0)
Discontinued Operation, Loan Asset Retained	36.0	55.0
Discontinued Operation, Loan Liability Retained	27.0	39.0
Sagent M&C, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Method Investments	237.0			$ 250.0
Income (Loss) from Equity Method Investments	13.0
Discontinued Operations, Held-for-sale or Disposed of by Sale \| Champion Mortgage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue - service related, net		26.0	44.0
Salaries, wages and benefits expense		(30.0)	(41.0)
General and administrative expense		21.0	(8.0)
Interest income		137.0	176.0
Interest expense		(105.0)	(174.0)
Loss on classification as discontinued operations		(65.0)	0.0
Loss from discontinued operations before income tax benefit		(16.0)	(3.0)
Less: Income tax benefit		(4.0)	(1.0)
Net loss from discontinued operations		(12.0)	$ (2.0)
Disposal Group, Including Discontinued Operation, Consideration					$ 1,640.0
Disposal Group, Discontinued Operation, Transaction Cost		$ 4.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Mortgage Servicing Platform
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration				260.0
Disposal Group, Discontinued Operation, Transaction Cost	$ 4.0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent				31.0
Disposal Group, Including Discontinued Operation, Cash				$ 9.9
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Mortgage Servicing Platform \| Sagent M&C, LLC \| Mr. Cooper Group Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				19.90%