BUSINESS ACQUISITIONS - Schedule of Unaudited Supplemental Pro Forma Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Caliber Home Loans Inc
Pro Forma (in millions)
Revenues	$ 5,422.7	$ 4,453.4
Income (loss) before income taxes	1,258.6	(529.9)
Genesis
Pro Forma (in millions)
Revenues	3,643.4	1,693.0
Income (loss) before income taxes	$ 981.8	$ (1,316.1)

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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