Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating Activities:
Net Income	$ 43.2	$ 44.4
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Increase in Deferred Policy Acquisition Costs	(14.2)	(1.9)
Amortization of Intangible Assets Acquired	4.5	3.7
Equity in Earnings of Equity Method Limited Liability Investments	(3.5)	(4.8)
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	1.3	12.4
Increase in Value of Fair Value Option Investments Reported in Investment Income	(2.7)	(0.3)
Amortization of Investment Securities and Depreciation of Investment Real Estate	7.0	7.3
Net Realized Gains on Sales of Investments	(37.4)	(10.1)
Net Impairment Losses Recognized in Earnings	9.2	4.9
Loss from Early Extinguishment of Debt	9.1	0.0
Depreciation of Property and Equipment	6.5	8.8
Write-off of Long-lived Asset	11.1	0.0
Decrease in Receivables	7.9	28.9
Increase in Insurance Reserves	23.3	2.6
Decrease in Unearned Premiums	(3.1)	(27.1)
Change in Income Taxes	(27.9)	(12.4)
Increase in Accrued Expenses and Other Liabilities	27.5	5.5
Other, Net	18.9	10.7
Net Cash Provided by Operating Activities	80.7	72.6
Investing Activities:
Sales, Paydowns and Maturities of Fixed Maturities	404.0	342.8
Purchases of Fixed Maturities	(309.7)	(225.7)
Sales of Equity Securities	143.4	69.9
Purchases of Equity Securities	(103.7)	(81.0)
Return of Investment of Equity Method Limited Liability Investments	21.0	26.4
Acquisitions of Equity Method Limited Liability Investments	(10.5)	(16.0)
Sales of Fair Value Option Investments	0.0	2.9
Purchases of Fair Value Option Investments	104.0	42.9
Decrease (Increase) in Short-term Investments	22.2	(198.0)
Improvements of Investment Real Estate	(0.8)	(1.3)
Sales of Investment Real Estate	0.0	0.9
Increase in Other Investments	(1.4)	(2.4)
Acquisition of Software	(5.6)	(5.6)
Acquisition of Business, Net of Cash Acquired	57.6	0.0
Disposition of Subsidiary, Net of Cash Disposed	0.0	8.9
Other, Net	(1.4)	(4.6)
Net Cash Used by Investing Activities	(4.1)	(125.7)
Financing Activities:
Net Proceeds from Issuances of Debt	288.8	144.2
Repayments of Debt	300.3	0.0
Common Stock Repurchases	(25.2)	(70.1)
Dividends and Dividend Equivalents Paid	(24.8)	(26.6)
Cash Exercise of Stock Options	1.9	0.0
Other, Net	0.7	0.9
Net Cash Provided (Used) by Financing Activities	(58.9)	48.4
Increase (Decrease) in Cash	17.7	(4.7)
Cash, Beginning of Year	76.1	66.5
Cash, End of Period	$ 93.8	$ 61.8