Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value (Details) - USD ($) $ in Millions		Dec. 31, 2025	Dec. 31, 2024
Mortgage Loans on Real Estate
Mortgage Loans	[1]	$ 2,109.5	$ 2,224.5
Percent of Total	[1]	100.00%	100.00%
Loan to Value Ratio Below or Equal to 65 Percent
Mortgage Loans on Real Estate
Mortgage Loans	[1]	$ 1,701.2	$ 1,639.6
Percent of Total	[1]	80.60%	73.80%
Loan To Value Ratio Above 65 To 75 Percent
Mortgage Loans on Real Estate
Mortgage Loans	[1]	$ 164.3	$ 367.6
Percent of Total	[1]	7.80%	16.50%
Loan To Value Ratio Above 75 To 85 Percent
Mortgage Loans on Real Estate
Mortgage Loans	[1]	$ 162.6	$ 152.3
Percent of Total	[1]	7.70%	6.80%
Loan To Value Ratio Above 85 Percent
Mortgage Loans on Real Estate
Mortgage Loans	[1]	$ 81.4	$ 65.0
Percent of Total	[1]	3.90%	2.90%
AA Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans		$ 125.6	$ 117.8
Percent of Total		6.00%	5.30%
A Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans		$ 1,053.4	$ 1,099.1
Percent of Total		49.90%	49.40%
BBB Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans		$ 804.0	$ 915.5
Percent of Total		38.10%	41.20%
BB Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans		$ 120.5	$ 85.0
Percent of Total		5.70%	3.80%
B Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans		$ 6.0	$ 7.1
Percent of Total		0.30%	0.30%

[1] Loan-to-Value Ratio utilizes the most recent internal valuation of the property