CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		2 Months Ended	11 Months Ended	12 Months Ended
		Dec. 31, 2023	Nov. 15, 2023	Dec. 31, 2024	Dec. 31, 2022
Cash flows provided by (used in) operating activities:
Net income (loss)		$ 0.9	$ (210.4)	$ (148.1)	$ (175.2)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Amortization and depreciation		39.6	12.2	183.4	18.5
Share-based payments expense		0.0	1.5	0.0	9.6
Deferred income tax expense (benefit), net		1.3	(14.9)	(41.8)	15.4
Net investment and other (gains) losses		0.3	22.7	(20.0)	115.3
Undistributed earnings from alternative investment portfolio		(2.2)	(11.5)	(24.5)	(17.7)
Loss on disposals of long-lived assets, net		0.0	1.2	0.0	0.6
Foreign currency exchange (gains) losses		0.6	1.8	(1.0)	0.0
Impairment of goodwill and intangibles		0.0	0.0	0.0	28.5
Change in:
Accrued investment income		(3.3)	1.4	1.8	0.2
Receivables		98.5	614.3	(42.7)	(193.6)
Deferred acquisition costs		(7.2)	8.8	(44.9)	(12.6)
Ceded unearned premiums		31.6	(69.7)	(1.8)	88.4
Reserves for losses and loss adjustment expenses		17.2	(27.9)	235.7	446.2
Unearned premiums		(69.6)	(12.0)	(117.8)	(74.7)
Ceded reinsurance payable and funds held		(57.3)	20.1	(46.7)	(162.9)
Income taxes		0.1	14.6	31.5	(47.5)
Accrued underwriting expenses and other liabilities		(19.3)	18.7	(19.6)	14.7
Other, net		(14.3)	(77.2)	(88.2)	0.0
Cash provided by (used in) operating activities		16.9	293.7	(144.7)	53.2
Cash flows provided by (used in) investing activities:
Sales of fixed maturity investments		0.7	24.2	286.6	818.5
Maturities and mandatory calls of fixed maturity investments		22.3	139.3	492.8	380.1
Sales of equity securities		0.0	45.7	2.8	17.8
Sales of short-term investments				2,760.1
Sales of other investments		22.2	24.0	78.7	58.1
Purchases of fixed maturity investments		(10.1)	(11.9)	(227.3)	(1,093.6)
Purchases of equity securities		0.0	(0.3)	(388.3)	(1.0)
Purchases of short-term investments				(2,552.4)
Purchases of other investments		(2.9)	(19.3)	(320.6)	(52.8)
Change in foreign regulatory deposits and voluntary pools		0.0	0.0	0.0	(6.7)
Change in short-term investments		24.1	(627.0)		26.1
Settlements of foreign currency exchange forward contracts		1.3	4.5	0.8	(22.0)
Proceeds from business divestitures, net of cash transferred		4.2	63.8	5.9	14.9
Purchases of fixed assets, net		0.0	(2.7)	(0.8)	(6.1)
Cash provided by (used in) investing activities		61.8	(359.7)	(192.0)	(26.6)
Cash flows provided by (used in) financing activities:
Debt borrowings		0.0	0.0	100.0	0.0
Repayment of debt		0.0	0.0	(100.0)	0.0
Issuance of common stock		0.0	0.0	200.0	0.0
Activity under stock incentive plans		0.0	0.7	0.0	1.8
Payment of cash dividends to preferred stockholders		0.0	(10.5)	(10.5)	(10.5)
Payment of cash dividends to common stockholders		0.0	0.3	0.0	(43.4)
Cash provided by (used in) financing activities		0.0	(9.5)	189.5	(52.1)
Effect of exchange rate changes on cash		0.0	0.3	0.0	0.4
Net change in cash and restricted cash including balances classified as held-for-sale		78.7	(75.2)	(147.2)	(25.1)
Net change in cash balances classified as held-for-sale	[1]	0.0	70.8	0.0	(70.8)
Cash, restricted cash, and cash equivalents, beginning of period		45.8	50.2	791.6	146.1
Cash, restricted cash, and cash equivalents, end of period		791.6	45.8	644.4	50.2
Mortgage Loans
Cash flows provided by (used in) investing activities:
Proceeds from loans		0.0	0.0	51.8	0.0
Purchase of loans		0.0	0.0	(114.9)	(159.9)
Private Loans
Cash flows provided by (used in) investing activities:
Proceeds from loans		0.0	0.0	57.1	0.0
Purchase of loans		$ 0.0	$ 0.0	$ (324.3)	$ 0.0

[1] See Note 2, “Recent Acquisitions, Disposals & Other Transactions” in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the Securities and Exchange Commission (the “2023 Form 10-K”) for details of the assets and liabilities classified as “held-for-sale” as of December 31, 2022.