Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 65
-Paragraph 15
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Investments - Schedule of Summarized Financial Information, Optimal Blue (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 15, 2020	Dec. 31, 2019
Condensed Combined Balance Sheets
Total current assets	$ 493.1	$ 493.1		$ 493.1			$ 630.9
Total assets	3,868.6	3,868.6	$ 1,893.7	3,868.6	$ 1,893.7	$ 2,000.0	2,092.2
Current liabilities	159.0	159.0		159.0			198.7
Long-term debt	70.3	70.3		70.3			127.1
Total liabilities	596.6	596.6		596.6			562.4
Additional paid-in capital	1,871.7	1,871.7		1,871.7			1,396.7
Retained earnings	1,398.5	1,398.5		1,398.5			143.6
Total liabilities and equity	3,868.6	3,868.6		3,868.6			$ 2,092.2
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Total revenues		334.0	351.2	2,113.3	974.8
Operating income (loss)		$ (28.4)	$ (21.5)	$ (127.4)	$ (54.0)
Optimal Blue \| Unconsolidated affiliates
Condensed Combined Balance Sheets
Total current assets						35.7
Goodwill and other intangible assets, net						1,863.5
Other assets						100.8
Current liabilities						26.2
Long-term debt						492.8
Other non-current liabilities						118.5
Total liabilities						637.5
Member's equity						578.0
Additional paid-in capital						812.1
Retained earnings						(27.6)
Total member's equity						1,362.5
Total liabilities and equity						$ 2,000.0
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Total revenues	6.7
Operating income (loss)	(20.3)
Net loss	$ (25.1)