CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fixed maturities available-for-sale, at cost	$ 2,283.6	$ 2,521.5
Fixed maturities, allowance for expected credit losses	1.0	0.2
Loans, at cost	234.9	144.8
Equity securities, cost	56.7	11.7
Other investments, cost	425.9	311.0
Short-term investments, cost	$ 656.7	$ 429.0
Preferred shares par value (in dollars per share)	$ 1.00	$ 1.00
Preferred shares, shares authorized (in shares)	10,000	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)	$ 0.01	$ 1.00
Common shares, shares authorized (in shares)	1,000	2,000,000,000
Common shares, shares issued (in shares)	13	1,056,638,730
Mortgage Loans
Loans, at cost	$ 234.9	$ 144.8
Loans, Allowance for credit loss	0.7	0.2
Private Loans
Loans, at cost	200.7	0.0
Loans, Allowance for credit loss	$ 0.5	$ 0.0