Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Investments:
Fixed Maturities at Fair Value (Amortized Cost: 2020 - $6,692.7; 2019 - $6,372.7; Allowance for Credit Losses: 2020 - $3.3)	$ 7,605.9	$ 6,922.1
Equity Securities at Fair Value (Cost: 2020 - $684.1; 2019 - $818.8)	858.5	907.3
Equity Securities at Modified Cost	40.1	41.9
Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings	$ 225.3	$ 220.4
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities	us-gaap:AccruedLiabilitiesAndOtherLiabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Convertible Securities at Fair Value	$ 39.9	$ 37.3
Short-term Investments at Cost which Approximates Fair Value	875.4	470.9
Other Investments	779.0	661.5
Total Investments	10,424.1	9,261.4
Cash	206.1	136.8
Receivables from Policyholders (Allowance for Credit Losses: 2020 - $20.9; 2019 - $22.3)	1,194.5	1,117.1
Other Receivables	222.4	219.7
Deferred Policy Acquisition Costs	589.3	537.7
Goodwill	1,114.0	1,114.0
Current Income Tax Assets	15.6	44.7
Other Assets	575.9	557.7
Total Assets	14,341.9	12,989.1
Insurance Reserves:
Life and Health	3,527.5	3,502.0
Property and Casualty	1,982.5	1,969.8
Total Insurance Reserves	5,510.0	5,471.8
Unearned Premiums	1,615.1	1,545.5
Policyholder Obligations	467.0	309.8
Deferred Income Tax Liabilities	285.7	178.2
Accrued Expenses and Other Liabilities	727.9	733.1
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2020 - $1,247.8; 2019 - $820.2)	1,172.8	778.4
Total Liabilities	9,778.5	9,016.8
Shareholders’ Equity:
Common Stock, $0.10 Par Value Per Share, 100,000,000 Shares Authorized; 65,436,207 Shares Issued and Outstanding at December 31, 2020 and 66,665,888 Shares Issued and Outstanding at December 31, 2019	6.5	6.7
Paid-in Capital	1,805.2	1,819.2
Retained Earnings	2,071.2	1,810.3
Accumulated Other Comprehensive Income	680.5	336.1
Total Shareholders’ Equity	4,563.4	3,972.3
Total Liabilities and Shareholders’ Equity	$ 14,341.9	$ 12,989.1