Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 94.9	$ 107.2
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	20.4	23.1
Share-based payments expense	11.7	14.4
Deferred income tax benefit, net	(2.2)	(7.4)
Net realized investment gains	(58.3)	(9.0)
Undistributed earnings from alternative investment portfolio	(19.4)	(20.7)
Change in:
Accrued investment income	(0.5)	(2.7)
Receivables	(282.6)	(148.5)
Deferred acquisition costs	7.5	(15.2)
Ceded unearned premiums	(147.1)	(114.6)
Reserves for losses and loss adjustment expenses	194.9	(19.2)
Unearned premiums	197.7	179.4
Ceded reinsurance payable and funds held	204.8	151.3
Income taxes	7.9	8.8
Accrued underwriting expenses and other liabilities	8.5	85.8
Other, net	(42.5)	(1.7)
Cash provided by operating activities	195.7	231.0
Cash flows from investing activities:
Sales of fixed maturity investments	1,046.3	1,158.6
Maturities and mandatory calls of fixed maturity investments	292.2	375.1
Sales of equity securities	66.3	165.0
Sales of other investments	67.7	93.6
Purchases of fixed maturity investments	(1,535.0)	(1,787.0)
Purchases of equity securities	(49.9)	(156.0)
Purchases of other investments	(54.6)	(34.2)
Change in foreign regulatory deposits and voluntary pools	2.3	13.4
Change in short-term investments	0.0	(47.2)
Settlements of foreign currency exchange forward contracts	(1.2)	2.0
Cash acquired with acquisition of Ariscom	0.0	15.6
Purchases of fixed assets	(22.9)	(35.8)
Other, net	29.6	3.6
Cash used in investing activities	(159.2)	(233.3)
Cash flows from financing activities:
Payment on note payable	(0.6)	0.0
Activity under stock incentive plans	1.4	1.0
Repurchase of Company's common shares	0.0	(30.0)
Payment of cash dividends to common shareholders	(32.5)	(28.0)
Cash used in financing activities	(31.7)	(57.0)
Effect of exchange rate changes on cash	1.1	1.2
Change in cash	5.9	(58.1)
Cash, beginning of year	139.2	176.6
Cash, end of period	$ 145.1	$ 118.5