Loans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Committed capital, gross	$ 3,800.0
Committed capital	1,900.0
Remaining committed capital amount	$ 100.5		$ 100.5
Investment owned (as a percent)	5.00%
Discount on gross commitment (as a percent)	4.50%		4.50%
Loan purchases and originations	$ 244.1		$ 244.1		$ 149.4
Total revenue	146.5	$ 136.1	278.7	$ 260.8
Kennedy Wilson
Financing Receivable, Allowance for Credit Loss [Line Items]
Committed capital	96.4
Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Total revenue	$ 4.7	$ 2.7	$ 8.4	$ 5.0