Investments in Loans and Financing Receivables - Allowance for Credit Losses Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 77.6	$ 131.0	$ 108.9	$ 111.5
Provision for credit losses	7.3	1.1	46.4	20.3
Write-offs	(5.0)	(31.1)	(74.9)	(31.1)
Foreign currency remeasurement	(0.1)	0.8	(0.6)	1.1
Allowance for credit losses, ending balance	79.8	101.8	79.8	101.8
Loans Receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	49.2	14.1	30.5	12.3
Provision for credit losses	8.0	(0.1)	27.2	1.4
Write-offs	0.0	0.0	0.0	0.0
Foreign currency remeasurement	0.0	0.8	(0.5)	1.1
Allowance for credit losses, ending balance	57.2	14.8	57.2	14.8
Financing Receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	25.5	116.9	78.4	99.2
Provision for credit losses	(0.1)	1.2	16.9	18.9
Write-offs	(5.0)	(31.1)	(74.9)	(31.1)
Foreign currency remeasurement	(0.1)	0.0	(0.1)	0.0
Allowance for credit losses, ending balance	20.3	87.0	20.3	87.0
Unfunded Loan Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	2.9	0.0	0.0	0.0
Provision for credit losses	(0.6)	0.0	2.3	0.0
Write-offs	0.0	0.0	0.0	0.0
Foreign currency remeasurement	0.0	0.0	0.0	0.0
Allowance for credit losses, ending balance	$ 2.3	$ 0.0	$ 2.3	$ 0.0