Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets
Debt securities, available for sale, at fair value, net of allowance for credit losses of $0.0 (2022 - $0.0) (cost - $4,554.8; 2022 - $2,678.1)	$ 4,423.3	$ 2,635.5
Debt securities, trading, at fair value (cost - $659.1; 2022 - $1,630.1)	616.4	1,526.0
Short-term investments, at fair value (cost - $544.7; 2022 - $984.5)	548.7	984.6
Investments in related party investment funds, at fair value	109.9	128.8
Other long-term investments, at fair value (cost - $356.0; 2022 - $392.0) (includes related party investments at fair value of $188.1 (2022 - $201.2))	326.1	377.2
Equity securities, trading, at fair value (cost - $1.8; 2022 - $1.8)	1.6	1.6
Total investments managed by related parties	6,026.0	5,653.7
Cash and cash equivalents	703.5	705.3
Restricted cash and cash equivalents	107.7	208.4
Redemption receivable from related party investment fund	2.4	18.5
Due from brokers	21.5	4.9
Interest and dividends receivable	41.1	26.7
Insurance and reinsurance balances receivable, net	2,057.6	1,876.9
Deferred acquisition costs, net	333.0	294.9
Unearned premiums ceded	464.7	348.8
Loss and loss adjustment expenses recoverable, net	2,314.2	1,376.2
Deferred tax asset	180.6	200.3
Intangible assets	155.6	163.8
Other assets	183.3	157.9
Total assets	12,591.2	11,036.3
Liabilities
Loss and loss adjustment expense reserves	5,448.8	5,268.7
Unearned premium reserves	1,762.8	1,521.1
Reinsurance balances payable	1,733.4	813.6
Deposit liabilities	135.8	140.5
Deferred gains on retroactive reinsurance contracts	25.8	0.0
Debt	763.5	778.0
Securities sold, not yet purchased, at fair value	0.0	27.0
Securities sold under an agreement to repurchase	0.0	18.0
Due to brokers	39.1	0.0
Deferred tax liability	81.2	59.8
Liability-classified capital instruments	62.0	60.4
Accounts payable, accrued expenses and other liabilities	273.4	266.6
Total liabilities	10,325.8	8,953.7
Commitments and contingent liabilities
Shareholders’ equity
Common shares (issued and outstanding: 165,068,101; 2022 - 162,177,653)	16.5	16.2
Additional paid-in capital	1,661.4	1,641.3
Retained earnings	507.5	262.2
Accumulated other comprehensive loss, net of tax	(135.4)	(45.0)
Shareholders’ equity attributable to SiriusPoint shareholders	2,250.0	2,074.7
Noncontrolling interests	15.4	7.9
Total shareholders’ equity	2,265.4	2,082.6
Total liabilities, noncontrolling interests and shareholders’ equity	12,591.2	11,036.3
Series B preference shares
Shareholders’ equity
Series B preference shares (par value $0.10; authorized and issued: 8,000,000)	$ 200.0	$ 200.0