Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities:
Net Income	$ 101.5	$ 50.2
Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities:
Increase in Deferred Policy Acquisition Costs	(12.7)	(10.2)
Amortization of Life Insurance Insurance in Force Acquired and Customer Relationships Acquired	5.9	8.6
Equity in Earnings of Equity Method Limited Liability Investments	(7.2)	(7.2)
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	10.7	0
Amortization of Investment Securities and Depreciation of Investment Real Estate	11.3	12.2
Net Realized Gains on Sales of Investments	(59.9)	(28.2)
Net Impairment Losses Recognized in Earnings	4.1	6.7
Net Gain on Sale of Portfolio of Automobile Loan Receivables	(12.9)	(4.5)
Benefit for Loan Losses	(2.0)	(34.1)
Depreciation of Property and Equipment	11.1	10.4
Decrease (Increase) in Other Receivables	4.6	(2.8)
Decrease in Insurance Reserves	(1.6)	(25.6)
Increase in Unearned Premiums	8.1	8.5
Change in Income Taxes	10.5	(12.1)
Decrease in Accrued Expenses and Other Liabilities	(1.0)	(8.3)
Other, Net	29.1	26.3
Net Cash Provided (Used) by Operating Activities	99.6	(10.1)
Investing Activities:
Sales and Maturities of Fixed Maturities	784.7	547.8
Purchases of Fixed Maturities	(574.0)	(577.1)
Sales of Equity Securities	30.8	236.6
Purchases of Equity Securities	(118.7)	(181.3)
Improvements of Investment Real Estate	(3.7)	(4.0)
Sales of Investment Real Estate	0	0.3
Return of Investment of Equity Method Limited Liability Investments	31.8	47.7
Acquisitions of Equity Method Limited Liability Investments	(18.5)	(17.5)
Decrease (Increase) in Short-term Investments	(49.9)	282.1
Net Proceeds from Sale of Portfolio of Automobile Loan Receivables	17.7	220.7
Receipts from Automobile Loan Receivables	2.0	158.6
Increase in Other Investments	(8.5)	(10.2)
Other, Net	(26.8)	(19.1)
Net Cash Provided by Investing Activities	66.9	684.6
Financing Activities:
Repayments of Certificates of Deposits	0	(321.8)
Proceeds from Issuance of Notes Payable	0	95.0
Repayments of Notes Payable	0	30.0
Common Stock Repurchases	(57.7)	(21.7)
Cash Dividends Paid to Shareholders	(42.9)	(43.7)
Cash Exercise of Stock Options	0	0.1
Excess Tax Benefits from Share-based Awards	0.2	0.2
Other, Net	1.4	1.2
Net Cash Used by Financing Activities	(99.0)	(320.7)
Increase in Cash	67.5	353.8
Cash, Beginning of Year	251.2	117.2
Cash, End of Period	$ 318.7	$ 471.0