Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities:
Net Income	$ 35.1	$ 58.4
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Decrease (Increase) in Deferred Policy Acquisition Costs	1.1	(1.1)
Amortization of Life Insurance in Force Acquired and Customer Relationships Acquired	1.8	2.1
Equity in Earnings of Equity Method Limited Liability Investments	(3.5)	(8.6)
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	7.0	3.4
Amortization of Investment Securities and Depreciation of Investment Real Estate	3.8	4.6
Net Realized Gains on Sales of Investments	(6.6)	(26.9)
Net Impairment Losses Recognized in Earnings	0.8	1.9
Depreciation of Property and Equipment	4.3	4.2
Decrease (Increase) in Receivables	(13.6)	8.7
Increase (Decrease) in Insurance Reserves	6.0	(15.7)
Decrease in Unearned Premiums	(16.4)	(4.1)
Change in Income Taxes	10.1	25.3
Increase in Accrued Expenses and Other Liabilities	2.3	20.7
Other, Net	4.9	8.4
Net Cash Provided by Operating Activities	37.1	81.3
Investing Activities:
Sales, Paydowns and Maturities of Fixed Maturities	188.8	297.5
Purchases of Fixed Maturities	(98.6)	(307.5)
Sales of Equity Securities	35.1	24.9
Purchases of Equity Securities	(67.0)	(40.7)
Sales of and Return of Investment of Equity Method Limited Liability Investments	10.1	13.1
Acquisitions of Equity Method Limited Liability Investments	(7.5)	(5.1)
Increase in Short-term Investments	(224.8)	(36.3)
Improvements of Investment Real Estate	(0.8)	(1.0)
Sales of Investment Real Estate	0.9	3.8
Increase in Other Investments	(1.8)	(2.0)
Acquisition of Software	(3.0)	(6.6)
Disposition of Business, Net of Cash Disposed	8.9	3.8
Other, Net	(2.5)	(4.2)
Net Cash Used by Investing Activities	(162.2)	(60.3)
Financing Activities:
Net Proceeds from Issuance of Subordinated Debentures	144.2	0
Common Stock Repurchases	(7.7)	(6.5)
Dividends and Dividend Equivalents Paid	(13.3)	(14.0)
Other, Net	0.4	0.7
Net Cash Provided (Used) by Financing Activities	123.6	(19.8)
Increase (Decrease) in Cash	(1.5)	1.2
Cash, Beginning of Year	66.5	96.3
Cash, End of Period	$ 65.0	$ 97.5