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Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Debt	$ 2,534.8	$ 2,490.4
Senior bank debt
Debt Instrument [Line Items]
Debt	349.9	349.9
Senior notes
Debt Instrument [Line Items]
Debt	1,094.8	1,093.5
Junior subordinated notes
Debt Instrument [Line Items]
Debt	751.5	751.4
Junior convertible securities
Debt Instrument [Line Items]
Debt	$ 338.6	$ 295.6

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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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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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