Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 01, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income from discontinued operations	$ 0.0	$ 2.0
Discontinued Operation, Loan Asset Retained	48.0		$ 55.0
Discontinued Operation, Loan Liability Retained	39.0		$ 39.0
Sagent M&C, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Method Investments	250.0
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Champion Mortgage [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue - service related, net		8.0
Salaries, wages and benefits expense		(8.0)
General and administrative expense		(7.0)
Interest income		43.0
Interest expense		(33.0)
Income from discontinued operations before income tax expense		3.0
Less: Income tax expense		1.0
Net income from discontinued operations		$ 2.0
Disposal Group, Discontinued Operation, Transaction Cost	0.0
Purchase price				$ 1,640.0
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, Discontinued Operation, Transaction Cost	4.0
Purchase price	260.0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	31.0
Cash received from disposal	9.9
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 223.0
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]
Ownership interest percentage	19.90%