CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fixed maturities available-for-sale, at cost	$ 2,371.9	$ 2,521.5
Fixed maturities, allowance for expected credit losses	0.5	0.2
Loans, at cost	228.1	144.8
Equity securities, cost	28.5	11.7
Other investments, cost	292.7	311.0
Short-term investments, cost	$ 790.1	$ 429.0
Preferred shares, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred shares, shares authorized (in shares)	30,000,000	30,000,000
Preferred shares, shares issued (in shares)	6,000	6,000
Liquidation preference (in dollars per share)	$ 25,000	$ 25,000
Common shares, par value (in dollars per share)	$ 1.00	$ 1.00
Common shares, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common shares, shares issued (in shares)	1,256,638,730	1,056,638,730
Mortgage Loans
Loans, Allowance for credit loss	$ 0.2	$ 0.2
Loans, at cost	228.1	144.8
Private Loans
Loans, Allowance for credit loss	0.7	0.0
Loans, at cost	$ 212.4	$ 0.0