Equity Securities, FV-NI, Ownership Percentage

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Investments - Schedule of Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jul. 06, 2020	Mar. 18, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 1,413.2		$ 1,413.2				$ 836.5
Equity in earnings (losses) of unconsolidated affiliates	$ (1.2)	$ (8.3)	$ 3.6	$ (50.8)
Dun And Bradstreet Corporation
Schedule of Equity Method Investments [Line Items]
Ownership interest, equity method investment	18.10%		18.10%		18.10%
Investments in unconsolidated affiliates	$ 668.5		$ 668.5				385.9
Equity in earnings (losses) of unconsolidated affiliates	$ (3.1)	(21.4)	$ (48.5)	(68.6)
Ceridian
Schedule of Equity Method Investments [Line Items]
Ownership interest, equity method investment	10.90%		10.90%
Investments in unconsolidated affiliates	$ 0.0		$ 0.0				309.5
Equity in earnings (losses) of unconsolidated affiliates	$ 0.0	12.7	$ 1.5	16.7
Optimal Blue
Schedule of Equity Method Investments [Line Items]
Ownership interest, equity method investment	20.00%		20.00%
Investments in unconsolidated affiliates	$ 284.3		$ 284.3				$ 0.0
Equity in earnings (losses) of unconsolidated affiliates	$ (4.7)	0.0	$ (4.7)	0.0
Senator Focused Strategies
Schedule of Equity Method Investments [Line Items]
Ownership interest, equity method investment	87.40%		87.40%				49.00%
Investments in unconsolidated affiliates	$ 235.7		$ 235.7				$ 46.7
Equity in earnings (losses) of unconsolidated affiliates	$ 1.6	0.0	$ 80.9	0.0
AmeriLife
Schedule of Equity Method Investments [Line Items]
Ownership interest, equity method investment	20.30%		20.30%			20.30%
Investments in unconsolidated affiliates	$ 120.7		$ 120.7				0.0
Equity in earnings (losses) of unconsolidated affiliates	(0.8)	0.0	(4.3)	0.0
Other
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	104.0		104.0				$ 94.4
Equity in earnings (losses) of unconsolidated affiliates	$ 5.8	$ 0.4	$ (21.3)	$ 1.1
Ceridian
Schedule of Equity Method Investments [Line Items]
Equity securities, FV-NI, ownership percentage	10.90%		10.90%