Debt - Schedule of the Change in Debt (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument
Beginning balance			$ 575.2
Repayments			(23.1)	$ (2.4)
Ending balance	$ 566.1		566.1
Asset Management (Kudu) | Kudu Credit Facility
Debt Instrument
Beginning balance			208.3
Ending balance	203.7		203.7
Asset Management (Kudu) | Term Loan | Kudu Credit Facility
Debt Instrument
Beginning balance	198.3	$ 225.4	215.2	225.4
Borrowings	12.0	35.0	12.0	35.0
Repayments	0.0	0.0	(16.9)	0.0
Ending balance	$ 210.3	$ 260.4	$ 210.3	$ 260.4