Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ 412.2	$ 4.0
Adjustments to reconcile net income (loss) to
Deferred policy acquisition costs	(3.2)	(6.4)
Premiums and other receivables	(85.7)	(46.4)
Unpaid claims and related items	29.8	65.1
Unearned premiums and other policyholders' liabilities	12.1	41.1
Income taxes	101.0	(15.0)
Reinsurance balances and funds	43.1	20.5
Realized investment (gains) losses from actual transactions	(12.3)	(15.5)
Unrealized investment (gains) losses from changes in fair value of equity securities	(355.6)	152.0
Accounts payable, accrued expenses and other	(5.3)	(68.7)
Total	136.2	130.8
Available for sale
Maturities and early calls	155.8	196.8
Sales	126.7	144.0
Sales of:
Equity securities	184.2	81.2
Other - net	3.0	4.7
Purchases of:
Available for sale	(369.6)	(324.9)
Equity securities	(172.8)	(103.1)
Other - net	(12.3)	(13.5)
Net decrease (increase) in short-term investments	3.9	195.1
Other - net	0.0	(1.5)
Total	(80.9)	178.9
Cash flows from financing activities:
Issuance of common shares	3.2	6.2
Redemption of debentures and notes	(6.5)	(4.7)
December 2017 and paid in January 2018 of $269.2)	(59.6)	(324.1)
Other - net	0.1	(9.5)
Total	(62.7)	(332.2)
Increase (decrease) in cash	(7.5)	(22.5)
Cash, beginning of period	100.3	125.9
Cash, end of period	92.8	103.4
Supplemental cash flow information:
Cash paid (received) during the period for: Interest	20.7	29.5
Cash paid (received) during the period for: Income taxes	$ 5.3	$ 5.2