Investments in Loans and Financing Receivables - Allowance for Credit Losses Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 108.9	$ 111.5
Provision for credit losses	39.1	19.2
Write-offs	(69.9)
Foreign currency remeasurement	(0.5)	0.3
Allowance for credit losses, ending balance	77.6	131.0
Loans Receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	30.5	12.3
Provision for credit losses	19.2	1.5
Write-offs	0.0
Foreign currency remeasurement	(0.5)	0.3
Allowance for credit losses, ending balance	49.2	14.1
Financing Receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	78.4	99.2
Provision for credit losses	17.0	17.7
Write-offs	(69.9)
Foreign currency remeasurement	0.0	0.0
Allowance for credit losses, ending balance	25.5	116.9
Unfunded Loan Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	0.0	0.0
Provision for credit losses	2.9	0.0
Write-offs	0.0
Foreign currency remeasurement	0.0	0.0
Allowance for credit losses, ending balance	$ 2.9	$ 0.0