CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total		Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comp (Loss) Earnings	Treasury Stock	Non-controlling Interests	Unconsolidated affiliates	Unconsolidated affiliates Additional Paid-in Capital	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Retained Earnings	Cumulative Effect, Period of Adoption, Adjustment Accumulated Other Comp (Loss) Earnings	Consolidated Entity	Consolidated Entity Additional Paid-in Capital	Consolidated Entity Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2018			72.2				0.0
Beginning balance at Dec. 31, 2018	$ 1,199.7		$ 0.0	$ 1,146.2	$ 45.8	$ (67.2)	$ (0.2)	$ 75.1			$ 15.5	$ 20.5	$ (5.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive earnings — unrealized gain on investments and other financial instruments, net of tax	0.4	[1]				0.4
Other comprehensive earnings — unrealized earnings of investments in unconsolidated affiliates, net of tax	3.4	[2]				3.4
Reclassification adjustments for unrealized gains and losses on investments and other financial instruments, net of tax, (excluding investments in unconsolidated affiliates) included in net earnings	(0.4)					(0.4)
Reclassification adjustments for unrealized gains and losses on unconsolidated affiliates, net of tax, included in net earnings	9.6	[3]				9.6
Dun & Bradstreet equity issuance costs	(1.4)			(1.4)
Treasury stock repurchases (in shares)							0.2
Treasury stock repurchases	(3.9)						$ (3.9)
Stock-based compensation								0.3	$ 7.6	$ 7.6				$ 3.3	$ 3.0
Contribution of CSA services from FNF	0.9			0.9
Subsidiary dividends paid to noncontrolling interests	(0.6)							(0.6)
Net earnings	40.6				52.8			(12.2)
Ending balance (in shares) at Sep. 30, 2019			72.2				0.2
Ending balance at Sep. 30, 2019	1,274.7		$ 0.0	1,156.3	119.1	(59.2)	$ (4.1)	62.6
Beginning balance (in shares) at Jun. 30, 2019			72.2				0.0
Beginning balance at Jun. 30, 2019	1,232.2		$ 0.0	1,152.0	72.9	(59.4)	$ (0.2)	66.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive earnings — unrealized gain on investments and other financial instruments, net of tax	0.6	[1]				0.6
Other comprehensive earnings — unrealized earnings of investments in unconsolidated affiliates, net of tax	(4.7)	[2]				(4.7)
Reclassification adjustments for unrealized gains and losses on investments and other financial instruments, net of tax, (excluding investments in unconsolidated affiliates) included in net earnings	(0.3)					(0.3)
Reclassification adjustments for unrealized gains and losses on unconsolidated affiliates, net of tax, included in net earnings	4.6	[3]				4.6
Treasury stock repurchases (in shares)							0.2
Treasury stock repurchases	(3.9)						$ (3.9)
Stock-based compensation									2.9	2.9				1.3	1.0	$ 0.3
Contribution of CSA services from FNF	0.4			0.4
Net earnings	41.6				46.2			(4.6)
Ending balance (in shares) at Sep. 30, 2019			72.2				0.2
Ending balance at Sep. 30, 2019	1,274.7		$ 0.0	1,156.3	119.1	(59.2)	$ (4.1)	62.6
Beginning balance (in shares) at Dec. 31, 2019			79.7				0.2
Beginning balance at Dec. 31, 2019	1,529.8		$ 0.0	1,396.7	143.6	(45.9)	$ (5.9)	41.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity offering, net of offering costs (in shares)			12.7
Equity offering, net of offering costs	455.0			455.0
Restaurant Group reorganization and deconsolidation of Blue Ribbon	(5.1)			5.2				(10.3)
Other comprehensive earnings — unrealized gain on investments and other financial instruments, net of tax	11.5	[1]				11.5
Other comprehensive earnings — unrealized earnings of investments in unconsolidated affiliates, net of tax	(1.7)	[2]				(1.7)
Reclassification adjustments for unrealized gains and losses on investments and other financial instruments, net of tax, (excluding investments in unconsolidated affiliates) included in net earnings	0.0
Reclassification adjustments for unrealized gains and losses on unconsolidated affiliates, net of tax, included in net earnings	46.2	[3]				46.2
Sale of noncontrolling interest in consolidated subsidiary	3.7							3.7
Treasury stock repurchases (in shares)							0.5
Treasury stock repurchases	(14.4)						$ (14.4)
Stock-based compensation									10.4	10.4				3.3	3.3
Contribution of CSA services from FNF	1.1			1.1
Net earnings	1,232.2				1,254.9			(22.7)
Ending balance (in shares) at Sep. 30, 2020			92.4				0.7
Ending balance at Sep. 30, 2020	3,272.0		$ 0.0	1,871.7	1,398.5	10.1	$ (20.3)	12.0
Beginning balance (in shares) at Jun. 30, 2020			92.4				0.7
Beginning balance at Jun. 30, 2020	3,133.8		$ 0.0	1,868.4	1,266.6	3.2	$ (20.3)	15.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive earnings — unrealized gain on investments and other financial instruments, net of tax	0.3	[1]				0.3
Other comprehensive earnings — unrealized earnings of investments in unconsolidated affiliates, net of tax	4.8	[2]				4.8
Reclassification adjustments for unrealized gains and losses on investments and other financial instruments, net of tax, (excluding investments in unconsolidated affiliates) included in net earnings	0.0
Reclassification adjustments for unrealized gains and losses on unconsolidated affiliates, net of tax, included in net earnings	1.8	[3]				1.8
Stock-based compensation									$ 1.8	$ 1.8				$ 1.2	$ 1.2
Contribution of CSA services from FNF	0.3			0.3
Net earnings	128.0				131.9			(3.9)
Ending balance (in shares) at Sep. 30, 2020			92.4				0.7
Ending balance at Sep. 30, 2020	$ 3,272.0		$ 0.0	$ 1,871.7	$ 1,398.5	$ 10.1	$ (20.3)	$ 12.0

[1] Net of income tax expense of $0.1 million and $0.2 million for the three months ended September 30, 2020 and 2019, respectively, and $3.1 million and $0.1 million for the nine months ended September 30, 2020 and 2019, respectively.

[2] Net of income tax expense (benefit) of $1.3 million and $(1.2) million for the three months ended September 30, 2020 and 2019, respectively, and $(0.4) million and $0.9 million for the nine months ended September 30, 2020 and 2019, respectively.(3)Net of income tax benefit of $0.1 million for the three and nine months ended September 30, 2019.

[3] Net of income tax expense of $0.5 million and $1.2 million for the three months ended September 30, 2020 and 2019, respectively, and $12.3 million and $2.5 million for the nine months ended September 30, 2020 and 2019, respectively.