Business Acquisition - Consideration Transferred (Details) - USD ($) $ in Millions		9 Months Ended
	Sep. 15, 2020	Sep. 30, 2020
Collateral Analytics and DocVerify
Business Acquisition [Line Items]
Cash paid		$ 74.1
Contingent consideration		3.1
Less: cash acquired		(3.7)
Total consideration, net		$ 73.5
Optimal Blue Holdco, LLC
Business Acquisition [Line Items]
Cash paid	$ 1,828.1
Less: cash acquired	(29.3)
Total consideration, net	$ 1,798.8