Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (68.7)	$ 54.7
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities
Depreciation and amortization, net	7.6	6.2
Share-based compensation	0.0	7.0
Net investment loss (gain)	39.3	(50.2)
Changes in operating assets and liabilities:
Deferred policy acquisition costs	(12.6)	(12.4)
Accrued investment income and other assets	0.6	(2.3)
Premiums receivables	(0.5)	(3.2)
Postretirement and pension benefits	(17.0)	(12.2)
Other liabilities and due to/from affiliates, net	8.5	(51.8)
Reinsurance recoverable on losses and loss expenses payable and prepaid reinsurance premiums	(22.5)	(2.6)
Losses and loss expenses payable	24.2	(54.1)
Unearned premiums	81.8	65.0
Excess Tax Benefit from Share-based Compensation, Operating Activities	(0.1)	(0.7)
Federal income taxes	(18.8)	12.7
Net cash provided by (used in) operating activities	21.8	(43.9)
Cash flows from investing activities:
Purchases of fixed maturities available-for-sale	(462.6)	(459.9)
Purchases of equity securities	(65.6)	(48.9)
Purchases of other invested assets	(7.3)	(12.9)
Maturities, calls and pay downs of fixed maturities available-for-sale	274.9	267.1
Sales of fixed maturities available-for-sale	216.1	248.7
Sales of equity securities	86.2	34.4
Sales of other invested assets	0.9	1.0
Proceeds from Sale of Property, Plant, and Equipment	0.2	1.6
Net cash provided by investing activities	42.8	31.1
Cash flows from financing activities:
Proceeds from issuance of common stock	2.8	4.8
Payments to acquire treasury stock	(0.9)	(0.5)
Payment of dividends	(13.1)	(13.0)
Proceeds from short-term debt	60.0	0.0
Repayment of short-term debt	(60.0)	0.0
Proceeds from long-term debt	21.5	0.0
Repayment of long-term debt	(21.5)	0.0
Net cash used in financing activities	(11.2)	(8.7)
Net increase (decrease) in cash and cash equivalents	53.4	(21.5)
Cash and cash equivalents at beginning of period	78.0	59.8
Cash and cash equivalents at end of period	131.4	38.3
Supplemental disclosures:
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 3.5	$ 3.5