Kemper (KMPR) 10-Q 6 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'KEMPER Corporation	'
Trading Symbol	'KMPR	'
Entity Central Index Key	'0000860748	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding at October 31, 2014	'	52,665,615

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Earned Premiums	$462.80	$507.50	$1,410.70	$1,530.20
Net Investment Income	72.3	82.4	216	237.8
Other Income	0.5	0.1	0.8	0.5
Net Realized Gains on Sales of Investments	8	49.1	18.1	78.3
Other-than-temporary Impairment Losses:	'	'	'	'
Total Other-than-temporary Impairment Losses	-3.8	-3.5	-8.7	-8.2
Portion of Losses Recognized in Other Comprehensive Income	0	0.1	0	1.9
Net Impairment Losses Recognized in Earnings	-3.8	-3.4	-8.7	-6.3
Total Revenues	539.8	635.7	1,636.90	1,840.50
Expenses:	'	'	'	'
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	300.5	338.3	975.9	1,041.70
Insurance Expenses	158.6	170.1	472	491.5
Write-off of Long-lived Asset	54.6	0	54.6	0
Interest and Other Expenses	22.1	25.3	67.3	74.3
Total Expenses	535.8	533.7	1,569.80	1,607.50
Income from Continuing Operations before Income Taxes	4	102	67.1	233
Income Tax Benefit (Expense)	0.8	-33.4	-17.8	-73.3
Income from Continuing Operations	4.8	68.6	49.3	159.7
Income (Loss) from Discontinued Operations	-0.1	1.5	-0.2	2.8
Net Income	$4.70	$70.10	$49.10	$162.50
Income from Continuing Operations Per Unrestricted Share:	'	'	'	'
Basic (in dollars per share)	$0.09	$1.21	$0.90	$2.77
Diluted (in dollars per share)	$0.09	$1.21	$0.90	$2.76
Net Income Per Unrestricted Share:	'	'	'	'
Basic (in dollars per share)	$0.09	$1.24	$0.90	$2.82
Diluted (in dollars per share)	$0.09	$1.23	$0.90	$2.81
Dividends Paid to Shareholders Per Share (in dollars per share)	$0.24	$0.24	$0.72	$0.72

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net Income	$4.70	$70.10	$49.10	$162.50
Other Comprehensive Income (Loss) Before Income Taxes:	'	'	'	'
Unrealized Holding Gains (Losses)	2.9	-33.4	220.5	-316.4
Foreign Currency Translation Adjustments	-0.5	0.2	-0.7	0.1
Amortization of Unrecognized Postretirement Benefit Costs	2	6.3	5.9	18.4
Other Comprehensive Income (Loss) Before Income Taxes	4.4	-26.9	225.7	-297.9
Other Comprehensive Income Tax Benefit (Expense)	-1.6	9.5	-79.6	106.3
Other Comprehensive Income (Loss)	2.8	-17.4	146.1	-191.6
Total Comprehensive Income (Loss)	$7.50	$52.70	$195.20	($29.10)

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets:	'	'
Fixed Maturities at Fair Value (Amortized Cost: 2014 - $4,318.5; 2013 - $4,370.5)	$4,697.20	$4,575
Equity Securities at Fair Value (Cost: 2014 - $547.3; 2013 - $530.0)	661.4	598.5
Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings	222.8	245.1
Fair Value Option Investments	50.6	0
Short-term Investments at Cost which Approximates Fair Value	316.2	284.7
Other Investments	450.5	448
Total Investments	6,398.70	6,151.30
Cash	93.1	66.5
Receivables from Policyholders	314.4	331.6
Other Receivables	247.5	193.1
Deferred Policy Acquisition Costs	306.7	302.9
Goodwill	311.8	311.8
Current and Deferred Income Tax Assets	4.3	31.8
Other Assets	228.8	267.4
Total Assets	7,905.30	7,656.40
Insurance Reserves:	'	'
Life and Health	3,260.80	3,217.50
Property and Casualty	780.9	843.5
Total Insurance Reserves	4,041.70	4,061
Unearned Premiums	568.2	598.9
Liabilities for Income Taxes	48.7	8.3
Debt at Amortized Cost (Fair Value: 2014 - $811.7; 2013 - $667.1)	751.9	606.9
Accrued Expenses and Other Liabilities	390.3	329.8
Total Liabilities	5,800.80	5,604.90
Shareholders' Equity:	'	'
Common Stock, $0.10 Par Value, 100 Million Shares Authorized; 52,665,615 Shares Issued and Outstanding at September 30, 2014 and 55,653,437 Shares Issued and Outstanding at December 31, 2013	5.3	5.6
Paid-in Capital	662.2	694.8
Retained Earnings	1,155.60	1,215.80
Accumulated Other Comprehensive Income	281.4	135.3
Total Shareholders' Equity	2,104.50	2,051.50
Total Liabilities and Shareholders' Equity	$7,905.30	$7,656.40

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Amortized Cost of Fixed Maturity Securities	$4,318.50	$4,370.50
Available for sale Securities, Equity Securities, Cost	547.3	530
Fair Value of Notes Payable	$811.70	$667.10
Common Stock, Par Value	$0.10	$0.10
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	52,665,615	55,653,437
Common Stock, Shares, Outstanding	52,665,615	55,653,437

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Operating Activities:	'	'
Net Income	$49.10	$162.50
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:	'	'
Increase in Deferred Policy Acquisition Costs	-3.8	-5.1
Amortization of Life Insurance in Force Acquired and Customer Relationships Acquired	5.4	6.3
Equity in Earnings of Equity Method Limited Liability Investments	-9.7	-19.9
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	14.4	15.1
Appreciation on Fair Value Option Investments	-0.6	0
Amortization of Investment Securities and Depreciation of Investment Real Estate	11.3	12.4
Net Realized Gains on Sales of Investments	-18.1	-78.3
Net Impairment Losses Recognized in Earnings	8.7	6.3
Depreciation of Property and Equipment	13	12.7
Write-off of Long-lived Asset	54.6	0
Decrease in Receivables	21	13.5
Decrease in Insurance Reserves	-20.1	-47.3
Decrease in Unearned Premiums	-30.7	-15.6
Change in Income Taxes	-12.9	34.3
Increase (Decrease) in Accrued Expenses and Other Liabilities	0.1	-36.2
Other, Net	17.7	32.2
Net Cash Provided by Operating Activities	99.4	92.9
Investing Activities:	'	'
Sales, Paydowns and Maturities of Fixed Maturities	454.1	578.5
Purchases of Fixed Maturities	-404.3	-667.4
Sales of Equity Securities	84.4	107.3
Purchases of Equity Securities	-95.1	-136
Sales of and Return of Investment of Equity Method Limited Liability Investments	37.4	26.5
Acquisitions of Equity Method Limited Liability Investments	-19.8	-8.3
Sales of Fair Value Option Investments	2.9	0
Purchases of Fair Value Option Investments	-52.9	0
Decrease (Increase) in Short-term Investments	-34.1	39.7
Improvements of Investment Real Estate	-1.9	-4.9
Sales of Investment Real Estate	0.9	102.5
Increase in Other Investments	-5.4	-6.5
Purchase of Corporate-owned Life Insurance	-33.5	0
Acquisition of Software	-8.5	-12.5
Disposition of Business, Net of Cash Disposed	8.9	3.8
Other, Net	-5.4	-8.5
Net Cash Provided (Used) by Investing Activities	-72.3	14.2
Financing Activities:	'	'
Net Proceeds from Issuance of Subordinated Debentures	144.2	0
Repayments of Debt	0	5.5
Common Stock Repurchases	-106.5	-82.9
Dividends and Dividend Equivalents Paid	-39.2	-41.5
Cash Exercise of Stock Options	0	0.6
Other, Net	1	2
Net Cash Used by Financing Activities	-0.5	-127.3
Increase (Decrease) in Cash	26.6	-20.2
Cash, Beginning of Year	66.5	96.3
Cash, End of Period	$93.10	$76.10

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Note 1 - Basis of Presentation
	The Condensed Consolidated Financial Statements included herein have been prepared pursuant to the rules and regulations of the SEC and include the accounts of Kemper Corporation (“Kemper”) and its subsidiaries (individually and collectively referred to herein as the “Company”) and are unaudited. All significant intercompany accounts and transactions have been eliminated.
	In the first quarter of 2014, the Company realigned its property and casualty insurance businesses. As a result of the realignment, the property and casualty insurance businesses are being reported as a single business segment named the Property & Casualty Insurance segment. The Company has reclassified certain prior-year amounts in its segment results in the Condensed Consolidated Financial Statements to conform to the current year presentation.
	Certain financial information that is normally included in annual financial statements, including certain financial statement footnote disclosures, prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) is not required by the rules and regulations of the SEC for interim financial reporting and has been condensed or omitted. In the opinion of the Company’s management, the Condensed Consolidated Financial Statements include all adjustments necessary for a fair presentation. The preparation of interim financial statements relies heavily on estimates. This factor and other factors, such as the seasonal nature of some portions of the insurance business, as well as market conditions, call for caution in drawing specific conclusions from interim results. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company’s Consolidated Financial Statements and related notes included in the 2013 Annual Report.

Investments

Investments	9 Months Ended
	Sep. 30, 2014
Investments Disclosures [Abstract]	'
Investments	'
	Note 2 - Investments
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2014 were:
			Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)		Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities		$	320.4		$	28.5		$	(5.4	)	$	343.5
	States and Political Subdivisions		1,336.00			107.5			(4.3		)	1,439.20
	Corporate Securities:
	Bonds and Notes		2,589.40			268			(18.4		)	2,839.00
	Redeemable Preferred Stocks		6.2			1.2			—			7.4
	Collateralized Loan Obligations		62.5			0.4			(0.4		)	62.5
	Other Mortgage- and Asset-backed		4			1.6			—			5.6
	Investments in Fixed Maturities		$	4,318.50		$	407.2		$	(28.5	)	$	4,697.20
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2013 were:
			Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)		Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities		$	351.1		$	22.8		$	(11.7	)	$	362.2
	States and Political Subdivisions		1,327.40			53.8			(20.2		)	1,361.00
	Corporate Securities:
	Bonds and Notes		2,636.40			205			(47.7		)	2,793.70
	Redeemable Preferred Stocks		6.6			0.8			—			7.4
	Collateralized Loan Obligations		44.2			0.5			—			44.7
	Other Mortgage- and Asset-backed		4.8			1.3			(0.1		)	6
	Investments in Fixed Maturities		$	4,370.50		$	284.2		$	(79.7	)	$	4,575.00
	Note 2 - Investments (continued)
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2014 by contractual maturity were:
	(Dollars in Millions)		Amortized Cost			Fair Value
	Due in One Year or Less		$	46.6		$	47.9
	Due after One Year to Five Years		728.5			777.4
	Due after Five Years to Ten Years		1,329.00			1,378.50
	Due after Ten Years		2,009.50			2,277.10
	Asset-backed Securities Not Due at a Single Maturity Date		204.9			216.3
	Investments in Fixed Maturities		$	4,318.50		$	4,697.20
	The expected maturities of the Company’s Investments in Fixed Maturities may differ from the contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Investments in Asset-backed Securities Not Due at a Single Maturity Date at September 30, 2014 consisted of securities issued by the Government National Mortgage Association with a fair value of $138.3 million, securities issued by the Federal National Mortgage Association with a fair value of $9.6 million, securities issued by the Federal Home Loan Mortgage Corporation with a fair value of $0.3 million and securities of other non-governmental issuers with a fair value of $68.1 million.
	There were no unsettled sales of Investments in Fixed Maturities at September 30, 2014. Other Receivables included unsettled sales of Investments in Fixed Maturities of $2.5 million at December 31, 2013, all of which settled in the following month. Accrued Expenses and Other Liabilities included unsettled purchases of Investments in Fixed Maturities of $6.8 million at September 30, 2014, all of which settled in the following month. There were no unsettled purchases of Investments in Fixed Maturities at December 31, 2013.
	Other Receivables included unsettled sales of Investments in Equity Securities of $53.4 million at September 30, 2014, all of which settled in the following month. There were no unsettled sales of Investments in Equity Securities at December 31, 2013. Accrued Expenses and Other Liabilities included unsettled purchases of Investments in Equity Securities of $51.3 million at September 30, 2014, all of which settled in the following month. There were no unsettled purchases of Investments in Equity Securities at December 31, 2013.
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at September 30, 2014 were:
						Gross Unrealized
	(Dollars in Millions)		Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate		$	85.5		$	4.9		$	(1.0	)	$	89.4
	Other Industries		20.2			5.6			(0.1		)	25.7
	Common Stocks:
	Manufacturing		84.8			25.9			(1.1		)	109.6
	Other Industries		67.3			22.6			(0.7		)	89.2
	Other Equity Interests:
	Exchange Traded Funds		125.2			5.2			(0.6		)	129.8
	Limited Liability Companies and Limited Partnerships		164.3			55.7			(2.3		)	217.7
	Investments in Equity Securities		$	547.3		$	119.9		$	(5.8	)	$	661.4
	Note 2 - Investments (continued)
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2013 were:
						Gross Unrealized
	(Dollars in Millions)		Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate		$	85.4		$	2.9		$	(2.5	)	$	85.8
	Other Industries		20.1			4.4			(0.1		)	24.4
	Common Stocks:
	Manufacturing		83.4			21.3			(0.1		)	104.6
	Other Industries		68.8			17			(0.9		)	84.9
	Other Equity Interests:
	Exchange Traded Funds		122			3.9			(1.0		)	124.9
	Limited Liability Companies and Limited Partnerships		150.3			25.2			(1.6		)	173.9
	Investments in Equity Securities		$	530		$	74.7		$	(6.2	)	$	598.5
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at September 30, 2014 is presented below.
		Less Than 12 Months						12 Months or Longer						Total
(Dollars in Millions)		Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
Fixed Maturities:
U.S. Government and Government Agencies and Authorities		$	24.3		$	(1.4	)	$	65.3		$	(4.0	)	$	89.6	$	(5.4	)
States and Political Subdivisions		50.1			(0.1		)	154.8			(4.2		)	204.9		(4.3		)
Corporate Securities:
Bonds and Notes		250.8			(2.8		)	409.4			(15.6		)	660.2		(18.4		)
Collateralized Loan Obligations		36.2			(0.3		)	2.2			(0.1		)	38.4		(0.4		)
Other Mortgage- and Asset-backed		—			—			0.7			—			0.7		—
Total Fixed Maturities		361.4			(4.6		)	632.4			(23.9		)	993.8		(28.5		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate		5			—			12.1			(1.0		)	17.1		(1.0		)
Other Industries		0.7			(0.1		)	0.7			—			1.4		(0.1		)
Common Stocks:
Manufacturing		30.8			(1.1		)	0.3			—			31.1		(1.1		)
Other Industries		12			(0.7		)	—			—			12		(0.7		)
Other Equity Interests:
Exchange Traded Funds		51.2			(0.2		)	14.5			(0.4		)	65.7		(0.6		)
Limited Liability Companies and Limited Partnerships		74.8			(2.0		)	2.4			(0.3		)	77.2		(2.3		)
Total Equity Securities		174.5			(4.1		)	30			(1.7		)	204.5		(5.8		)
Total		$	535.9		$	(8.7	)	$	662.4		$	(25.6	)	$	1,198.30	$	(34.3	)
The Company regularly reviews its investment portfolio for factors that may indicate that a decline in fair value of an investment is other than temporary. The portions of the declines in the fair values of investments that are determined to be other than temporary are reported as losses in the Condensed Consolidated Statements of Income in the periods when such determinations are made.
Note 2 - Investments (continued)
Unrealized losses on fixed maturities, which the Company has determined to be temporary at September 30, 2014, were $28.5 million, of which $23.9 million was related to fixed maturities that were in an unrealized loss position for 12 months or longer. There were no unrealized losses at September 30, 2014 related to securities for which the Company has recognized credit losses in earnings in the preceding table under the heading “Less Than 12 Months.” Included in the preceding table under the heading “12 Months or Longer” were unrealized losses of $0.3 million related to securities for which the Company has recognized credit losses in earnings. Investment-grade fixed maturity investments comprised $24.7 million and below-investment-grade fixed maturity investments comprised $3.8 million of the unrealized losses on investments in fixed maturities at September 30, 2014. For below-investment-grade fixed maturity investments in an unrealized loss position, the unrealized loss amount, on average, was less than 4% of the amortized cost basis of the investment. At September 30, 2014, the Company did not have the intent to sell these investments and it was not more likely than not that the Company would be required to sell these investments before it recovered the amortized cost of such investments, which may be at maturity. Based on the Company’s evaluation at September 30, 2014 of the prospects of the issuers, including, but not limited to, the credit ratings of the issuers of the investments in the fixed maturities, and the Company’s intention to not sell and its determination that it would not be required to sell before it recovered the amortized cost of such investments, the Company concluded that the declines in the fair values of the Company’s investments in fixed maturities presented in the preceding table were temporary at the evaluation date.
For equity securities, the Company considers various factors when determining whether a decline in the fair value is other than temporary, including, but not limited to:
•	The financial condition and prospects of the issuer;
•	The length of time and magnitude of the unrealized loss;
•	The volatility of the investment;
•	Analyst recommendations and near term price targets;
•	Opinions of the Company’s external investment managers;
•	Market liquidity;
•	Debt-like characteristics of perpetual preferred stocks and issuer ratings; and
•	The Company’s intentions to sell or ability to hold the investments until recovery.
With respect to Investments in Equity Securities, the Company concluded that the unrealized losses on its investments in preferred and common stocks at September 30, 2014 were temporary based on various factors, including the relative short length and magnitude of the losses and overall market volatility. The Company’s investments in other equity interests include investments in limited liability companies and limited partnerships that primarily invest in mezzanine debt, distressed debt, and secondary transactions. By the nature of their underlying investments, the Company believes that its investments in the limited liability companies and limited partnerships exhibit debt-like characteristics which, among other factors, the Company also considers when evaluating these investments for impairment. Based on evaluations of the factors in the preceding paragraph, the Company concluded that the declines in the fair values of the Company’s investments in equity securities presented in the preceding table were temporary at September 30, 2014.
Note 2 - Investments (continued)
An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2013 is presented below.
		Less Than 12 Months						12 Months or Longer						Total
(Dollars in Millions)		Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
Fixed Maturities:
U.S. Government and Government Agencies and Authorities		$	95.8		$	(10.9	)	$	4.4		$	(0.8	)	$	100.2	$	(11.7	)
States and Political Subdivisions		222.9			(20.1		)	2			(0.1		)	224.9		(20.2		)
Corporate Securities:
Bonds and Notes		699.8			(39.4		)	103.2			(8.3		)	803		(47.7		)
Other Mortgage- and Asset-backed		13.9			(0.1		)	1.1			—			15		(0.1		)
Total Fixed Maturities		1,032.40			(70.5		)	110.7			(9.2		)	1,143.10		(79.7		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate		22.5			(2.5		)	2.5			—			25		(2.5		)
Other Industries		4.3			(0.1		)	0.7			—			5		(0.1		)
Common Stocks:
Manufacturing		5			(0.1		)	0.2			—			5.2		(0.1		)
Other Industries		14.2			(0.9		)	0.5			—			14.7		(0.9		)
Other Equity Interests:
Exchange Traded Funds		67.6			(1.0		)	—			—			67.6		(1.0		)
Limited Liability Companies and Limited Partnerships		53.1			(0.9		)	5			(0.7		)	58.1		(1.6		)
Total Equity Securities		166.7			(5.5		)	8.9			(0.7		)	175.6		(6.2		)
Total		$	1,199.10		$	(76.0	)	$	119.6		$	(9.9	)	$	1,318.70	$	(85.9	)
Unrealized losses on fixed maturities, which the Company has determined to be temporary at December 31, 2013, were $79.7 million, of which $9.2 million was related to fixed maturities that were in an unrealized loss position for 12 months or longer. There were no unrealized losses at December 31, 2013 related to securities for which the Company has recognized credit losses in earnings in the preceding table under the heading “Less Than 12 Months.” Included in the preceding table under the heading “12 Months or Longer” there were unrealized losses of $0.3 million at December 31, 2013 related to securities for which the Company has recognized credit losses in earnings. Investment-grade fixed maturity investments comprised $74.2 million and below-investment-grade fixed maturity investments comprised $5.5 million of the unrealized losses on investments in fixed maturities at December 31, 2013. For below-investment-grade fixed maturity investments in an unrealized loss position, the unrealized loss amount, on average, was less than 5% of the amortized cost basis of the investment. At December 31, 2013, the Company did not have the intent to sell these investments and it was not more likely than not that the Company would be required to sell these investments before it recovered the amortized cost of such investments, which may be at maturity. Based on the Company’s evaluation at December 31, 2013 of the prospects of the issuers, including, but not limited to, the credit ratings of the issuers of the investments in the fixed maturities, and the Company’s intention to not sell and its determination that it would not be required to sell before it recovered the amortized cost of such investments, the Company concluded that the declines in the fair values of the Company’s investments in fixed maturities presented in the preceding table were temporary at the evaluation date.
With respect to Investments in Equity Securities, the Company concluded that the unrealized losses on its investments in preferred and common stocks at December 31, 2013 were temporary based on various factors, including the relative short length and magnitude of the losses and overall market volatility. The Company’s investments in other equity interests include investments in limited liability companies and limited partnerships that primarily invest in distressed debt, mezzanine debt and secondary transactions. By the nature of their underlying investments, the Company believes that its investments in limited liability companies and limited partnerships also exhibit debt-like characteristics which, among other factors, the Company also
Note 2 - Investments (continued)
considers when evaluating these investments for impairment. Based on the Company’s evaluations, it concluded that the declines in the fair values of the Company’s investments in equity securities in the preceding table were temporary at December 31, 2013.
The following table sets forth the pre-tax amount of other-than-temporary-impairment (“OTTI”) credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of the dates indicated, for which the portion of the OTTI loss related to factors other than credit has been recognized in Accumulated Other Comprehensive Income, and the corresponding changes in such amounts.
		Nine Months Ended						Three Months Ended
(Dollars in Millions)		Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
Balance at Beginning of Period		$	9.9		$	4.6		$	12.9		$	4.4
Additions for Previously Unrecognized OTTI Credit Losses		2.4			1.8			—			0.8
Increases to Previously Recognized OTTI Credit Losses		0.6			1.3			—			1.3
Reductions for Change in Impairment Status:
From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell		(2.4		)	(3.2		)	(2.4		)	(2.1		)
Reductions for Investments Sold During Period		—			(0.1		)	—			—
Balance at End of Period		$	10.5		$	4.4		$	10.5		$	4.4
Gross gains and losses on sales of investments in fixed maturities and equity securities for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
(Dollars in Millions)		Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
Fixed Maturities:
Gains on Sales		$	5		$	29.6		$	0.2		$	2.5
Equity Securities:
Gains on Sales		11.7			1.9			7.9			0.7
Losses on Sales		—			(0.3		)	—			(0.2		)
For the nine months ended September 30, 2014, Kemper purchased and sold $52.9 million and $2.9 million, respectively, of investments in certain hedge funds. The Company has elected the fair value option (“FVO”) to account for such investments. Under the FVO method of accounting, the Company reports changes in the fair value of such investments in Net Investment Income in the Condensed Consolidated Statement of Income. The hedge funds are designed to preserve liquidity, while providing higher returns than Kemper would otherwise expect to earn had it invested in other short-term investments. The fair value of such investments reported as Fair Value Option Investments in the Condensed Consolidated Balance Sheet was $50.6 million at September 30, 2014.
The carrying values of the Company’s Other Investments at September 30, 2014 and December 31, 2013 were:
(Dollars in Millions)		Sep 30,			Dec 31,
		2014			2013
Loans to Policyholders at Unpaid Principal		$	280.8		$	275.4
Real Estate at Depreciated Cost		164.3			167.1
Trading Securities at Fair Value		5			5
Other		0.4			0.5
Total		$	450.5		$	448

Property_and_Casualty_Insuranc

Property and Casualty Insurance Reserves	9 Months Ended
	Sep. 30, 2014
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]	'
Property and Casualty Insurance Reserves	'
	Note 3 - Property and Casualty Insurance Reserves
	Property and casualty insurance reserve activity for the nine months ended September 30, 2014 and 2013 was:
		Nine Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,
		2014			2013
	Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	843.5		$	970.6
	Less Reinsurance Recoverables at Beginning of Year	63.4			66.2
	Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	780.1			904.4
	Incurred Losses and LAE Related to:
	Current Year:
	Continuing Operations	756.9			811.1
	Prior Years:
	Continuing Operations	(44.7		)	(43.2		)
	Discontinued Operations	(0.2		)	(4.5		)
	Total Incurred Losses and LAE Related to Prior Years	(44.9		)	(47.7		)
	Total Incurred Losses and LAE	712			763.4
	Paid Losses and LAE Related to:
	Current Year:
	Continuing Operations	460.3			485.8
	Prior Years:
	Continuing Operations	302.6			354.4
	Discontinued Operations	6.5			9.8
	Total Paid Losses and LAE Related to Prior Years	309.1			364.2
	Total Paid Losses and LAE	769.4			850
	Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	722.7			817.8
	Plus Reinsurance Recoverables at End of Period	58.2			66.8
	Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	$	780.9		$	884.6
	Property and casualty insurance reserves are estimated based on historical experience patterns and current economic trends. Actual loss experience and loss trends are likely to differ from these historical experience patterns and economic conditions. Loss experience and loss trends emerge over several years from the dates of loss inception. The Company monitors such emerging loss trends on a quarterly basis. Changes in such estimates are included in the Condensed Consolidated Statements of Income in the period of change.
	For the nine months ended September 30, 2014, the Company reduced its property and casualty insurance reserves by $44.9 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance losses and LAE reserves developed favorably by $44.0 million, and commercial lines insurance losses and LAE reserves developed favorably by $0.9 million. Personal automobile insurance losses and LAE reserves developed favorably by $26.9 million, homeowners insurance losses and LAE reserves developed favorably by $13.3 million, and other personal lines losses and LAE reserves developed favorably by $3.8 million. The personal lines insurance losses and LAE reserves developed favorably due primarily to the emergence of more favorable loss patterns than expected for the three most recent accident years.
	Note 3 - Property and Casualty Insurance Reserves (continued)
	For the nine months ended September 30, 2013, the Company reduced its property and casualty insurance reserves by $47.7 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance losses and LAE reserves developed favorably by $41.2 million, and commercial lines insurance losses and LAE reserves developed favorably by $6.5 million. The commercial lines insurance losses and LAE reserves included favorable development of $2.0 million from continuing operations and $4.5 million from discontinued operations. Personal automobile insurance losses and LAE reserves developed favorably by $22.6 million, homeowners insurance losses and LAE reserves developed favorably by $13.3 million, and other personal lines losses and LAE reserves developed favorably by $5.3 million. The personal lines insurance losses and LAE reserves developed favorably due primarily to the emergence of more favorable loss patterns than expected for the three most recent accident years.
	The Company cannot predict whether losses and LAE will develop favorably or unfavorably from the amounts reported in the Company’s Condensed Consolidated Financial Statements. The Company believes that any such development will not have a material effect on the Company’s consolidated shareholders’ equity, but could have a material effect on the Company’s consolidated financial results for a given period.

Debt

Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Note 4 - Debt
	The amortized cost of debt outstanding at September 30, 2014 and December 31, 2013 was:
	(Dollars in Millions)	Sep 30,			Dec 31,
		2014			2013
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	249.4		$	249
	6.00% Senior Notes due May 15, 2017	358.3			357.9
	7.375% Subordinated Debentures due February 27, 2054	144.2			—
	Total Debt Outstanding	$	751.9		$	606.9
	Kemper has a four-year, $225.0 million, unsecured, revolving credit agreement, expiring March 7, 2016, with a group of financial institutions. The credit agreement provides for fixed and floating rate advances for periods up to six months at various interest rates. The credit agreement contains various financial covenants, including limits on total debt to total capitalization, consolidated net worth and minimum risk-based capital ratios for Kemper’s largest insurance subsidiaries, United Insurance Company of America (“United Insurance”) and Trinity Universal Insurance Company (“Trinity”). Proceeds from advances under the credit agreement may be used for general corporate purposes, including repayment of existing indebtedness. There were no outstanding borrowings under the credit agreement at either September 30, 2014 or December 31, 2013.
	United Insurance and Trinity are members of the Federal Home Loan Bank (“FHLB”) of Chicago and Dallas, respectively. The FHLB memberships provide United Insurance and Trinity with access to additional sources of liquidity. Effective December 31, 2013, Trinity and the FHLB of Dallas entered into agreements pursuant to which Trinity may obtain advances from the FHLB of Dallas. Effective March 18, 2014, United Insurance and the FHLB of Chicago entered into agreements pursuant to which United Insurance may obtain advances from the FHLB of Chicago. Advances from the FHLB of Dallas and Chicago are subject to collateral requirements as specified in the respective agreements with Trinity and United Insurance. There were no advances from the FHLB of Dallas or Chicago outstanding at either September 30, 2014 or December 31, 2013.
	On February 27, 2014, Kemper issued $150.0 million of its 7.375% subordinated debentures due February 27, 2054 (the “2054 Subordinated Debentures”). The net proceeds of the issuance were $144.2 million, net of discount and transaction costs, for an effective yield of 7.69%. The 2054 Subordinated Debentures are unsecured and are subordinated and junior to the senior indebtedness of Kemper. Interest on the 2054 Subordinated Debentures is payable quarterly. As long as no event of default has occurred, Kemper may defer interest payments on the 2054 Subordinated Debentures for up to five consecutive years without giving rise to an event of default. During a deferral period, interest will continue to accrue at the stated interest rate compounded quarterly. Kemper is permitted to redeem some or all of the 2054 Subordinated Debentures on or after February 27, 2019, at a redemption price that is equal to their principal amount plus accrued and unpaid interest. Kemper is permitted to redeem the 2054 Subordinated Debentures in whole, but not in part, at any time prior to February 27, 2019, within 90 days of the occurrence of certain tax events or rating agency events, at specified redemption prices.
	Note 4 - Debt (Continued)
	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Notes Payable under Revolving Credit Agreement	$	0.6		$	0.9		$	0.2		$	0.3
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	11.6			11.6			3.9			3.9
	6.00% Senior Notes due May 15, 2017	16.6			16.6			5.5			5.5
	7.375% Subordinated Debentures due February 27, 2054	6.6			—			2.8			—
	Mortgage Note Payable	—			0.2			—			—
	Interest Expense before Capitalization of Interest	35.4			29.3			12.4			9.7
	Capitalization of Interest	(0.8		)	(0.7		)	(0.3		)	(0.2		)
	Total Interest Expense	$	34.6		$	28.6		$	12.1		$	9.5
	Interest paid, including facility fees, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Notes Payable under Revolving Credit Agreement	$	0.5		$	0.6		$	0.2		$	0.4
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	7.5			7.5			—			—
	6.00% Senior Notes due May 15, 2017	10.8			10.8			—			—
	7.375% Subordinated Debentures due February 27, 2054	5.5			—			2.7			—
	Mortgage Note Payable	—			0.3			—			0.1
	Total Interest Paid	$	24.3		$	19.2		$	2.9		$	0.5

Longterm_Equitybased_Compensat

Long-term Equity-based Compensation Plans	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Long-term Equity-based Compensation Plans	'
	Note 5 - Long-term Equity-based Compensation Plans
	As of September 30, 2014, there were 8,187,286 common shares available for future grants under Kemper’s long-term equity-based compensation plan, of which 538,050 shares were reserved for future grants based on the performance level attained under the terms of outstanding performance-based restricted stock and performance-based restricted stock unit (“RSU”) awards. Equity-based compensation expense was $5.8 million and $4.4 million for the nine months ended September 30, 2014 and 2013, respectively. Total unamortized compensation expense related to nonvested awards at September 30, 2014 was $5.6 million, which is expected to be recognized over a weighted-average period of 1.9 years.
	Outstanding equity-based compensation awards at December 31, 2013 consisted of tandem stock option and stock appreciation rights (“Tandem Awards”), time-vested restricted stock, performance-based restricted stock and deferred stock units (“DSUs”). Effective February 4, 2014, the Company began issuing time-based and performance-based RSUs. Recipients of restricted stock receive full dividend and voting rights on the same basis as all other outstanding shares of Kemper common stock. Recipients of RSUs and DSUs receive full dividend equivalents on the same basis as all other outstanding shares of Kemper common stock, but do not receive voting rights until such shares are issued. Except for equity-based compensation awards granted to each member of the Board of Directors who is not employed by the Company (“Non-employee Directors”), all outstanding awards are subject to forfeiture until certain restrictions have lapsed.
	Note 5 - Long-term Equity-based Compensation Plans (continued)
	The Company uses the Black-Scholes option pricing model to estimate the fair value of each Tandem Award on the date of grant. The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the nine months ended September 30, 2014 and 2013 were as follows:
		Nine Months Ended
		Sep 30, 2014					Sep 30, 2013
	Range of Valuation Assumptions
	Expected Volatility	25.76	%	-	44.43	%	39.1	%	-	48.23	%
	Risk-free Interest Rate	1.07		-	2.14		0.62		-	1.38
	Expected Dividend Yield	2.53		-	2.6		2.83		-	3
	Weighted-Average Expected Life in Years
	Employee Grants	4		-	7		4		-	7
	Director Grants	6					6
	Tandem Award activity for the nine months ended September 30, 2014 is presented below.
		Shares Subject			Weighted-			Weighted-		Aggregate
		to Award			Average			Average		Intrinsic Value
					Exercise Price			Remaining		($ in Millions)
					Per Share ($)			Contractual Life
								(in Years)
	Outstanding at Beginning of the Year	2,543,673			$	41.37
	Granted	289,000			36.59
	Exercised	(26,375	)		28.76
	Forfeited or Expired	(492,248	)		47.56
	Outstanding at September 30, 2014	2,314,050			$	39.61		4.2		$	3.1
	Vested and Expected to Vest at September 30, 2014	2,289,388			$	39.67		4.16		$	3.1
	Exercisable at September 30, 2014	1,970,046			$	40.49		3.41		$	2.8
	The weighted-average grant-date fair values of Tandem Awards granted during the nine months ended September 30, 2014 and 2013 were $10.49 per option and $10.20 per option, respectively. Total intrinsic value of Tandem Awards exercised was $0.3 million and $1.8 million for the nine months ended September 30, 2014 and 2013, respectively. The total tax benefit realized for tax deductions from exercises of Tandem Awards was $0.1 million and $0.6 million for the nine months ended September 30, 2014 and 2013, respectively. Cash received from exercises of Tandem Awards was insignificant for the nine months ended September 30, 2014. Cash received from exercises of Tandem Awards was $0.6 million for the nine months ended September 30, 2013.
	Note 5 - Long-term Equity-based Compensation Plans (continued)
	Information pertaining to Tandem Awards outstanding at September 30, 2014 is presented below.
								Outstanding						Exercisable
	Range of Exercise Prices							Shares			Weighted-		Weighted-	Shares	Weighted-
								Subject to Award			Average		Average	Subject to Tandem	Average
											Exercise Price		Remaining	Award	Exercise Price
											Per Share ($)		Contractual		Per Share ($)
													Life (in Years)
	$	10		-	$	15		16,750			$	13.55	2.7	16,750	$	13.55
	15.01			-	20			8,000			16.48		4.6	8,000	16.48
	20.01			-	25			30,750			23.38		4.18	30,750	23.38
	25.01			-	30			389,000			28.85		6.71	339,248	28.74
	30.01			-	35			243,750			33.18		8.29	140,500	32.98
	35.01			-	40			586,625			36.9		6.26	395,623	37.11
	40.01			-	45			185,902			43.1		0.34	185,902	43.1
	45.01			-	50			796,505			48.59		1.41	796,505	48.59
	50.01			-	55			56,768			51.16		0.35	56,768	51.16
	10			-	55			2,314,050			39.61		4.2	1,970,046	40.49
	The grant-date fair values of time-based restricted stock and time-based RSU awards are determined using the closing price of Kemper common stock on the date of grant. Activity related to nonvested time-based restricted stock and nonvested time-based RSUs for the nine months ended September 30, 2014 was as follows:
		Time-based Restricted						Time-based RSU Awards
		Stock Awards
		Number of Shares			Weighted-			Number of RSUs			Weighted-
					Average						Average
					Grant-Date						Grant-Date
					Fair Value						Fair Value
					Per Share						Per RSU
	Nonvested Balance at Beginning of the Year	101,627			$	31.48		—			$	—
	Granted	2,000			38.59			41,925			36.56
	Vested	(25,568	)		30.56			(9,351	)		36.47
	Forfeited	(21,789	)		31			(1,500	)		36.47
	Nonvested Balance at End of Period	56,270			32.33			31,074			36.6
	Note 5 - Long-term Equity-based Compensation Plans (continued)
	The grant-date fair values of the performance-based restricted stock and performance-based RSU awards are determined using the Monte Carlo simulation method. Activity related to nonvested performance-based restricted stock and nonvested performance-based RSUs for the nine months ended September 30, 2014 was as follows:
		Performance-based Restricted Stock Awards						Performance-based RSU Awards
		Number of Shares			Weighted-			Number of RSUs			Weighted-
Average					Average
Grant-Date					Grant-Date
Fair Value					Fair Value
Per Share					Per RSU
Nonvested Balance at Beginning of the Year	176,800			$	39.54		—			$	—
Granted	—			—			66,575			40.5
Vested	(54,934	)		39.83			—			—
Forfeited	(7,691	)		40.12			(1,400	)		40.5
Nonvested Balance at End of Period	114,175			39.37			65,175			40.5
The initial number of shares or RSUs awarded to each participant of a performance-based award represents the shares that would vest, or, in the case of a RSU, that would vest and would be issued, if the performance level attained were to be at the “target” performance level. For performance above the target level, each participant would receive a grant of additional shares of stock up to a maximum of 100% of the initial number of shares or RSUs awarded to the participant. The final payout of these awards will be determined based on Kemper’s total shareholder return over a three-year performance period relative to a peer group comprised of all the companies in the S&P Supercomposite Insurance Index. The number of additional shares that would be granted if the Company were to meet or exceed the maximum performance levels related to the outstanding performance-based awards for the 2014, 2013 and 2012 three-year performance periods was 65,175 common shares, 56,400 common shares and 57,775 common shares, respectively, at September 30, 2014. For the 2011 three-year performance period, the Company exceeded target performance levels with a total payout percentage, including the target payout percentage, of 118%. Accordingly, an additional 9,014 shares of stock were issued to award recipients on February 1, 2014 (the “2011 Additional Shares”).
The total fair value of the shares of restricted stock and RSUs that vested during the nine months ended September 30, 2014 and the 2011 Additional Shares that were issued was $3.6 million and the tax benefits for tax deductions realized from such shares was $1.2 million. The total fair value of the shares of restricted stock that vested during the nine months ended September 30, 2013 and the additional shares that were issued in connection with the 2010 performance-based restricted stock awards was $4.0 million and the tax benefits for tax deductions realized from such shares was $1.4 million.
The grant-date fair values of DSU awards granted to Non-employee Directors are determined using the closing price of Kemper common stock on the date of grant. DSU awards granted to Non-employee Directors are fully vested on the date of grant. Activity related to DSU awards for the nine months ended September 30, 2014 was as follows:
	Number of DSUs			Weighted-
				Average
				Grant-Date
				Fair Value
				Per DSU
Vested Balance at Beginning of the Year	4,000			$	31.5
Granted and Vested	4,000			37.53
Vested Balance at End of Period	8,000			34.52

Income_from_Continuing_Operati

Income from Continuing Operations Per Unrestricted Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Income from Continuing Operations Per Unrestricted Share	'
	Note 6 - Income from Continuing Operations Per Unrestricted Share
	The Company’s awards of restricted stock contain rights to receive non-forfeitable dividends and participate in the undistributed earnings with common shareholders. The Company’s awards of RSUs and DSUs contain rights to receive non-forfeitable dividend equivalents and participate in the undistributed earnings with common shareholders. Accordingly, the Company is required to apply the two-class method of computing basic and diluted earnings per share. A reconciliation of the numerator and denominator used in the calculation of Basic Income from Continuing Operations Per Unrestricted Share and Diluted Income from Continuing Operations Per Unrestricted Share for the nine and three months ended September 30, 2014 and 2013 is as follows:
		Nine Months Ended						Three Months Ended
		Sep 30,			Sep 30,			Sep 30,		Sep 30,
		2014			2013			2014		2013
	(Dollars in Millions)
	Income from Continuing Operations	$	49.3		$	159.7		$	4.8	$	68.6
	Less Income from Continuing Operations Attributed to Participating Awards	0.2			0.8			—		0.3
	Income from Continuing Operations Attributed to Unrestricted Shares	49.1			158.9			4.8		68.3
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—			—			—		—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	49.1		$	158.9		$	4.8	$	68.3
	(Number of Shares in Thousands)
	Weighted-average Unrestricted Shares Outstanding	54,245.70			57,374.40			52,605.30		56,365.80
	Equity-based Compensation Equivalent Shares	110.5			118.8			94.6		135.7
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	54,356.20			57,493.20			52,699.90		56,501.50
	(Per Unrestricted Share in Whole Dollars)
	Basic Income from Continuing Operations Per Unrestricted Share	$	0.9		$	2.77		$	0.09	$	1.21
	Diluted Income from Continuing Operations Per Unrestricted Share	$	0.9		$	2.76		$	0.09	$	1.21
	The number of shares of Kemper common stock that were excluded from the calculations of Equity-based Compensation Equivalent Shares and Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution for the nine and three months ended September 30, 2014 and 2013 because the exercise prices for the options exceeded the average market price is presented below.
		Nine Months Ended					Three Months Ended
	(Number of Shares in Thousands)	Sep 30,		Sep 30,			Sep 30,		Sep 30,
		2014		2013			2014		2013
	Equity-based Compensation Equivalent Shares	1,540.60		2,194.00			1,830.50		2,125.80
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,540.60		2,194.00			1,830.50		2,125.80

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]	'
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income	'
	Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income
	The components of Other Comprehensive Income (Loss) Before Income Taxes for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$	228.5		$	(291.5	)	$	7.2		$	(33.8	)
	Reclassification Adjustment for Amounts Included in Net Income	(8.0		)	(24.9		)	(4.3		)	0.4
	Unrealized Holding Gains (Losses)	220.5			(316.4		)	2.9			(33.4		)
	Foreign Currency Translation Adjustments	(0.7		)	0.1			(0.5		)	0.2
	Amortization of Unrecognized Postretirement Benefit Costs	5.9			18.4			2			6.3
	Other Comprehensive Income (Loss) Before Income Taxes	$	225.7		$	(297.9	)	$	4.4		$	(26.9	)
	The components of Other Comprehensive Income Tax Benefit (Expense) for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Other Comprehensive Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	$	(80.6	)	$	104.1		$	(2.6	)	$	11.9
	Reclassification Adjustment for Amounts Included in Net Income	2.8			8.7			1.5			(0.1		)
	Unrealized Holding Gains and Losses	(77.8		)	112.8			(1.1		)	11.8
	Foreign Currency Translation Adjustment	0.3			—			0.2			—
	Amortization of Unrecognized Postretirement Benefit Costs	(2.1		)	(6.5		)	(0.7		)	(2.3		)
	Other Comprehensive Income Tax Benefit (Expense)	$	(79.6	)	$	106.3		$	(1.6	)	$	9.5
	The components of Accumulated Other Comprehensive Income (“AOCI”) at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,			Dec 31,
		2014			2013
	Net Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	1		$	0.3
	Other Net Unrealized Gains on Investments	317.5			175.5
	Foreign Currency Translation Adjustments, Net of Income Taxes	0.4			0.8
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(37.5		)	(41.3		)
	Accumulated Other Comprehensive Income	$	281.4		$	135.3
	Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (continued)
	Components of AOCI were reclassified to the following lines of the Condensed Consolidated Statements of Income for the nine and three months ended September 30, 2014 and 2013:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Reclassification of AOCI from Net Unrealized Gains on Investments to:
	Net Realized Gains on Sales of Investments	$	16.7		$	31.2		$	8.1		$	3
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Total Before Income Taxes	8			24.9			4.3			(0.4		)
	Income Tax Benefit (Expense)	(2.8		)	(8.7		)	(1.5		)	0.1
	Reclassification from AOCI, Net of Income Taxes	5.2			16.2			2.8			(0.3		)
	Reclassification of AOCI from Amortization of Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(5.9		)	(18.4		)	(2.0		)	(6.3		)
	Income Tax Benefit	2.1			6.5			0.7			2.3
	Reclassification from AOCI, Net of Income Taxes	(3.8		)	(11.9		)	(1.3		)	(4.0		)
	Total Reclassification from AOCI to Net Income	$	1.4		$	4.3		$	1.5		$	(4.3	)

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 8 - Income Taxes
	Current and Deferred Income Tax Assets at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,		Dec 31,
		2014		2013
	Current Income Tax Assets	$	4.3	$	—
	Deferred Income Tax Assets	—		31.8
	Current and Deferred Income Tax Assets	$	4.3	$	31.8
	The components of Liabilities for Income Taxes at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,		Dec 31,
		2014		2013
	Current Income Tax Liabilities	$	—	$	1.5
	Deferred Income Tax Liabilities	41.7		—
	Unrecognized Tax Benefits	7		6.8
	Liabilities for Income Taxes	$	48.7	$	8.3
	Income taxes paid were $30.1 million and $39.6 million for the nine months ended September 30, 2014 and 2013, respectively.
	In July 2014, the Company extended the federal statute of limitations related to its 2007 through 2010 tax years to July 31, 2015. The extension was requested by the Internal Revenue Service to provide it with additional time to prepare the necessary documentation for the Joint Committee of Taxation’s review required by statute. The Company does not anticipate a material modification to the filed returns or the related refunds that have been received.
	During the second quarter of 2014, the Illinois Department of Revenue finalized its examinations of the Company’s 2009 and 2010 tax returns with no material change in the Company’s tax liability.

Pension_Benefits_and_Postretir

Pension Benefits and Postretirement Benefits Other Than Pensions	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Pension Benefits and Postretirement Benefits Other Than Pensions	'
	Note 9 - Pension Benefits and Postretirement Benefits Other Than Pensions
	The components of Pension Expense for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Service Cost Earned	$	6.5		$	8.1		$	2.1		$	2.7
	Interest Cost on Projected Benefit Obligation	18.6			16.8			6.2			5.6
	Expected Return on Plan Assets	(26.2		)	(22.3		)	(8.7		)	(7.4		)
	Amortization of Accumulated Unrecognized Actuarial Loss	7.3			19.7			2.5			6.6
	Total Pension Expense Recognized	$	6.2		$	22.3		$	2.1		$	7.5
	The components of Postretirement Benefits Other than Pensions Expense for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Service Cost on Benefits Earned	$	0.1		$	0.1		$	—		$	—
	Interest Cost on Projected Benefit Obligation	0.9			0.9			0.3			0.3
	Amortization of Accumulated Unrecognized Actuarial Gain	(1.4		)	(0.9		)	(0.5		)	(0.3		)
	Total Postretirement Benefits Other than Pensions Expense	$	(0.4	)	$	0.1		$	(0.2	)	$	—

Business_Segments

Business Segments	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Business Segments	'
	Note 10 - Business Segments
	The Company is engaged, through its subsidiaries, in the property and casualty insurance and life and health insurance businesses. The Company conducts its operations through two operating segments: Property & Casualty Insurance and Life & Health Insurance.
	The Property & Casualty Insurance segment’s principal products are personal automobile insurance, both standard and non-standard risk, homeowners insurance, other personal insurance and commercial automobile insurance. These products are primarily distributed through independent agents, employer-sponsored voluntary benefit programs and other affinity relationships. The Life & Health Insurance segment’s principal products are individual life, accident, health and property insurance. These products are distributed by career agents employed by the Company as well as exclusive and non-exclusive independent agents.
	Earned Premiums by product line for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Personal Automobile	$	633.4		$	729.4		$	205.1		$	239.1
	Homeowners	236.6			244.8			77.9			82.3
	Other Personal Property and Casualty Insurance	96.2			101.2			31.8			33.5
	Commercial Automobile	40.8			38.7			14.1			13.5
	Life	291.6			294.9			96.8			98.4
	Accident and Health	112.1			121.2			37.1			40.7
	Total Earned Premiums	$	1,410.70		$	1,530.20		$	462.8		$	507.5
	Note 10 - Business Segments (continued)
	Segment Revenues, including a reconciliation to Total Revenues, for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	949.5		$	1,054.70		$	309.7		$	348.7
	Net Investment Income	55.6			67.9			18.5			21.3
	Other Income	0.4			0.4			0.1			0.1
	Total Property & Casualty Insurance	1,005.50			1,123.00			328.3			370.1
	Life & Health Insurance:
	Earned Premiums	461.2			475.5			153.1			158.8
	Net Investment Income	147.4			159.3			49.2			56.5
	Other Income	0.4			0.1			0.4			—
	Total Life & Health Insurance	609			634.9			202.7			215.3
	Total Segment Revenues	1,614.50			1,757.90			531			585.4
	Net Realized Gains on Sales of Investments	18.1			78.3			8			49.1
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Other	13			10.6			4.6			4.6
	Total Revenues	$	1,636.90		$	1,840.50		$	539.8		$	635.7
	Segment Operating Profit, including a reconciliation to Income from Continuing Operations before Income Taxes, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Segment Operating Profit (Loss):
	Property & Casualty Insurance	$	(8.9	)	$	98		$	(23.9	)	$	32.2
	Life & Health Insurance	90.7			98.3			31.4			35.2
	Total Segment Operating Profit	81.8			196.3			7.5			67.4
	Corporate and Other Operating Loss	(24.1		)	(35.3		)	(7.7		)	(11.1		)
	Total Operating Profit (Loss)	57.7			161			(0.2		)	56.3
	Net Realized Gains on Sales of Investments	18.1			78.3			8			49.1
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Income from Continuing Operations before Income Taxes	$	67.1		$	233		$	4		$	102
	Note 10 - Business Segments (continued)
	Segment Net Operating Income, including a reconciliation to Income from Continuing Operations, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Segment Net Operating Income (Loss):
	Property & Casualty Insurance	$	(0.4	)	$	71.5		$	(13.6	)	$	23.4
	Life & Health Insurance	58.3			64.4			20.3			22.9
	Total Segment Net Operating Income	57.9			135.9			6.7			46.3
	Corporate and Other Net Operating Loss	(14.7		)	(23.0		)	(4.6		)	(7.4		)
	Consolidated Net Operating Income	43.2			112.9			2.1			38.9
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	11.8			50.9			5.2			31.9
	Net Impairment Losses Recognized in Earnings	(5.7		)	(4.1		)	(2.5		)	(2.2		)
	Income from Continuing Operations	$	49.3		$	159.7		$	4.8		$	68.6

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Note 11 - Fair Value Measurements
	The Company classifies its investments in Fixed Maturities and Equity Securities as available for sale and reports these investments at fair value. The Company classifies certain investments in mutual funds included in Other Investments as trading securities and reports these investments at fair value. The Company has no material liabilities that are measured and reported at fair value.
	The valuation of assets measured at fair value in the Company’s Condensed Consolidated Balance Sheet at September 30, 2014 is summarized below.
		Fair Value Measurements
	(Dollars in Millions)	Quoted Prices				Significant Other				Significant			Total Fair Value
		in Active Markets				Observable				Unobservable
		for Identical Assets				Inputs				Inputs
		(Level 1)				(Level 2)				(Level 3)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	124.4			$	219.1			$	—		$	343.5
	States and Political Subdivisions	—				1,439.20				—			1,439.20
	Corporate Securities:
	Bonds and Notes	—				2,498.00				341			2,839.00
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				62.5			62.5
	Other Mortgage- and Asset-backed	—				1.6				4			5.6
	Total Investments in Fixed Maturities	124.4				4,157.90				414.9			4,697.20
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				84.4				5			89.4
	Other Industries	—				11				14.7			25.7
	Common Stocks:
	Manufacturing	101				7.5				1.1			109.6
	Other Industries	72.5				2.3				14.4			89.2
	Other Equity Interests:
	Exchange Traded Funds	129.8				—				—			129.8
	Limited Liability Companies and Limited Partnerships	—				—				217.7			217.7
	Total Investments in Equity Securities	303.3				105.2				252.9			661.4
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				50.6			50.6
	Other Investments:
	Trading Securities	5				—				—			5
	Total	$	432.7			$	4,263.10			$	718.4		$	5,414.20
	At September 30, 2014, the Company had unfunded commitments to invest an additional $108.9 million in certain limited liability investment companies and limited partnerships that will be included in Other Equity Interests when funded.
	Note 11 - Fair Value Measurements (continued)
	The valuation of assets measured at fair value in the Company’s Condensed Consolidated Balance Sheet at December 31, 2013 is summarized below.
		Fair Value Measurements
	(Dollars in Millions)	Quoted Prices				Significant Other				Significant			Total Fair Value
		in Active Markets				Observable				Unobservable
		for Identical Assets				Inputs				Inputs
		(Level 1)				(Level 2)				(Level 3)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	121.2			$	241			$	—		$	362.2
	States and Political Subdivisions	—				1,361.00				—			1,361.00
	Corporate Securities:
	Bonds and Notes	—				2,429.60				364.1			2,793.70
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				44.7			44.7
	Other Mortgage- and Asset-backed	—				1.5				4.5			6
	Total Investments in Fixed Maturities	121.2				4,033.10				420.7			4,575.00
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				80.8				5			85.8
	Other Industries	—				10.5				13.9			24.4
	Common Stocks:
	Manufacturing	95.1				7.3				2.2			104.6
	Other Industries	71.7				2.2				11			84.9
	Other Equity Interests:
	Exchange Traded Funds	124.9				—				—			124.9
	Limited Liability Companies and Limited Partnerships	—				—				173.9			173.9
	Total Investments in Equity Securities	291.7				100.8				206			598.5
	Other Investments:
	Trading Securities	5				—				—			5
Total	$	417.9			$	4,133.90			$	626.7		$	5,178.50
The Company’s investments in Fixed Maturities that are classified as Level 1 in the two preceding tables primarily consist of U.S. Treasury Bonds and Notes. The Company’s investments in Equity Securities that are classified as Level 1 in the two preceding tables consist of either investments in publicly-traded common stocks or exchange traded funds. The Company’s investments in Fixed Maturities that are classified as Level 2 in the two preceding tables primarily consist of investments in corporate bonds, obligations of states and political subdivisions, and bonds and mortgage-backed securities of U.S. government agencies. The Company’s investments in Equity Securities that are classified as Level 2 in the two preceding tables primarily consist of investments in preferred stocks. The Company uses a leading, nationally recognized provider of market data and analytics to price the vast majority of the Company’s Level 2 measurements. The provider utilizes evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information. Because many fixed maturity securities do not trade on a daily basis, the provider’s evaluated pricing applications apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing to prepare evaluations. In addition, the provider uses model processes to develop prepayment and interest rate scenarios. The pricing provider’s models and processes also take into account market convention. For each asset class, teams of its evaluators gather information from market sources and integrate relevant credit information, perceived market movements and sector news into the evaluated pricing applications and models. The Company generally validates the measurements obtained from its primary
Note 11 - Fair Value Measurements (continued)
pricing provider by comparing them with measurements obtained from one additional pricing provider that provides either prices from recent market transactions, quotes in inactive markets or evaluations based on its own proprietary models.
The Company investigates significant differences related to the values provided. On completion of its investigation, management exercises judgment to determine the price selected and whether adjustments, if any, to the price obtained from the Company’s primary pricing provider would warrant classification of the price as Level 3. In instances where a measurement cannot be obtained from either pricing provider, the Company generally will evaluate bid prices from one or more binding quotes obtained from market makers to value investments in inactive markets and classified by the Company as Level 2. The Company generally classifies securities when it receives non-binding quotes or indications as Level 3 securities unless the Company can validate the quote or indication against recent transactions in the market. For securities classified as Level 3, the Company either uses valuations provided by third party fund managers, third party appraisers, the Company’s own internal valuations or net asset values provided for Limited Liability Companies and Limited Partnerships and Fair Value Option Investments. These valuations typically employ various valuation techniques, including earnings multiples based on comparable public securities, comparable market yields as well as industry-specific non-earnings based multiples or discounted cash flow models. Valuations classified as Level 3 by the Company generally consist of investments in various private placement securities of non-rated entities. In rare cases, if the private placement security has only been outstanding for a short amount of time, the Company, after considering the initial assumptions used in acquiring an investment, considers the original purchase price as representative of the fair value.
The majority of Investments in Fixed Maturities that are classified as Level 3 are priced using a market yield approach. A market yield approach uses a risk-free rate plus a credit spread depending on the underlying credit profile of the security. For floating rate securities, the risk-free rate used in the market yield is the contractual floating rate of the security. For each individual security, the Company or the Company’s third party appraiser gathers information from market sources, relevant credit information, perceived market movements and sector news and determines an appropriate market yield for each security. The market yield selected is then used to discount the estimated future cash flows of the security to determine the fair value. The Company separately evaluates market yields based upon asset class to assess the reasonableness of the recorded fair value. For non-investment-grade Investments in Fixed Maturities that are classified as Level 3, the two primary asset classes are senior debt and junior debt. Senior debt includes those securities that receive first priority in a liquidation and junior debt includes any fixed maturity security with other than first priority in a liquidation.
The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at September 30, 2014.
(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
Investment-grade	Market Yield		$	113.7			0.7	%	-	5.9	%	3.9	%
Non-investment-grade:
Senior Debt	Market Yield		87.3				3.4		-	15.5		9.8
Junior Debt	Market Yield		129.9				5.4		-	25.9		13.3
Collateralized Loan Obligations	Market Yield		62.5				2		-	7.5		4.7
Other	Various		21.5
Total Fixed Maturity Investments in Corporate Securities			$	414.9
Note 11 - Fair Value Measurements (continued)
The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2013.
DOLLARS IN MILLIONS	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
Investment-grade	Market Yield		$	108.5			1	%	-	6	%	4.3	%
Non-investment-grade:
Senior Debt	Market Yield		93.9				4.2		-	15.6		8.6
Junior Debt	Market Yield		153.5				8.8		-	26.6		14.2
Collateralized Loan Obligations	Market Yield		44.7				3.2		-	6.8		4.3
Other Debt	Various		20.1
Total Fixed Maturity Investments in Corporate Securities			$	420.7
For an investment in a fixed maturity security, an increase in the yield used to determine the fair value of the security will decrease the fair value of the security. A decrease in the yield used to determine fair value will increase the fair value of the security, but the fair value increase is generally limited to par if the security is currently callable.
Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the nine months ended September 30, 2014 is presented below.
	Fixed Maturities														Equity Securities
(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair			Total
	Bonds				Preferred							and Asset-			and			Equity			Value
	and Notes				Stocks							backed			Common			Interests			Option
															Stocks
Balance at Beginning of Period	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	—		$	626.7
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	(4.1		)		—				0.1			0.1			3.1			—			0.6			(0.2		)
Included in Other Comprehensive Income	4				0.4				(0.4		)	0.2			3			29.7			—			36.9
Purchases	117.6				—				18.1			—			2.8			38.6			50			227.1
Settlements	(92.4		)		(0.4		)		—			(0.8		)	(3.6		)	(21.8		)	—			(119.0		)
Sales	(47.6		)		—				—			—			(2.2		)	(2.7		)	—			(52.5		)
Transfers out of Level 3	(0.6		)		—				—			—			—			—			—			(0.6		)
Balance at End of Period	$	341			$	7.4			$	62.5		$	4		$	35.2		$	217.7		$	50.6		$	718.4
Note 11 - Fair Value Measurements (continued)
Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the three months ended September 30, 2014 is presented below.
	Fixed Maturities														Equity Securities
(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair			Total
	Bonds				Preferred							and Asset-			and			Equity			Value
	and Notes				Stocks							backed			Common			Interests			Option
															Stocks
Balance at Beginning of Period	$	384.8			$	7.1			$	49.5		$	3.9		$	36.3		$	194.4		$	40.3		$	716.3
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	(1.8		)		—				—			—			0.8			0.3			0.3			(0.4		)
Included in Other Comprehensive Income	(1.4		)		0.5				(0.3		)	0.1			1			19.2			—			19.1
Purchases	31.7				—				13.3			—			0.1			12.3			10			67.4
Settlements	(41.6		)		(0.2		)		—			—			(0.8		)	(8.2		)	—			(50.8		)
Sales	(30.7		)		—				—			—			(2.2		)	(0.3		)	—			(33.2		)
Balance at End of Period	$	341			$	7.4			$	62.5		$	4		$	35.2		$	217.7		$	50.6		$	718.4
The Company’s policy is to recognize transfers between levels as of the end of the reporting period. There were no transfers between Levels 1 and 2 or Levels 1 and 3 for the nine and three months ended September 30, 2014. The transfers out of Level 3 for the nine months ended September 30, 2014 were due to changes in the availability of market observable inputs. There were no transfers into Level 3 for the nine months ended September 30, 2014. There were no transfers into or out of Level 3 for the three months ended September 30, 2014.
Note 11 - Fair Value Measurements (continued)
Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the nine months ended September 30, 2013 is presented below.
	Fixed Maturities														Equity Securities
(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Total
	Bonds				Preferred							and Asset-			and Common			Equity
	and Notes				Stocks							backed			Stocks			Interests
Balance at Beginning of Period	$	361			$	4.7			$	—		$	0.1		$	13.3		$	141.3		$	520.4
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	(2.7		)		(0.4		)		0.1			—			(1.0		)	0.1			(3.9		)
Included in Other Comprehensive Income	(7.2		)		(0.1		)		—			(0.3		)	3.9			(1.6		)	(5.3		)
Purchases	92.9				5.1				41.2			4.6			0.6			34.5			178.9
Settlements	(94.1		)		(0.1		)		—			(0.1		)	—			(20.3		)	(114.6		)
Sales	(0.5		)		—				—			—			(0.7		)	—			(1.2		)
Transfers into Level 3	5.8				—				—			2.4			—			—			8.2
Transfers out of Level 3	(5.8		)		—				—			—			—			—			(5.8		)
Balance at End of Period	$	349.4			$	9.2			$	41.3		$	6.7		$	16.1		$	154		$	576.7
Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the three months ended September 30, 2013 is presented below.
	Fixed Maturities														Equity Securities
(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Total
	Bonds				Preferred							and Asset-			and Common			Equity
	and Notes				Stocks							backed			Stocks			Interests
Balance at Beginning of Period	$	351.5			$	4.3			$	29.8		$	6.7		$	16.6		$	147.3		$	556.2
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	(1.8		)		—				—			—			(0.9		)	0.3			(2.4		)
Included in Other Comprehensive Income	0.9				(0.1		)		0.4			(0.1		)	0.8			(0.8		)	1.1
Purchases	17.3				5.1				11.1			0.1			—			16.5			50.1
Settlements	(21.0		)		(0.1		)		—			—			—			(9.3		)	(30.4		)
Sales	(0.5		)		—				—			—			(0.4		)	—			(0.9		)
Transfers into Level 3	3				—				—			—			—			—			3
Balance at End of Period	$	349.4			$	9.2			$	41.3		$	6.7		$	16.1		$	154		$	576.7
There were no transfers between Levels 1 and 2 or Levels 1 and 3 for the nine and three months ended September 30, 2013. Transfers into and out of Level 3 for the nine months ended September 30, 2013 were due to changes in the availability of market observable inputs. The transfers into Level 3 for the three months ended September 30, 2013 were due to changes in the availability of market observable inputs. There were no transfers out of Level 3 for the three months ended September 30, 2013.
The fair value of Debt is estimated using quoted prices for similar liabilities in markets that are not active. The inputs
used in the valuation are considered Level 2 measurements. The fair value of Short-term Investments is estimated using inputs that are considered either Level 1 or Level 2 measurements.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Contingencies	'
	Note 12 - Contingencies
	In the ordinary course of its businesses, the Company is involved in legal proceedings, including lawsuits, regulatory examinations and inquiries. Except with regard to the matters discussed below, based on currently available information, the Company does not believe that it is reasonably possible that any of its pending legal proceedings will have a material effect on the Company’s consolidated financial statements.
	Over the last several years, certain state insurance regulators, legislators, treasurers/controllers, and their respective agents have been involved in an array of initiatives that seek, in various ways, to impose new duties on life insurance companies to proactively search for deaths of their insureds and contact the insureds’ beneficiaries even though such beneficiaries may not have submitted claims, including due proof of death, as required under the terms of state-approved life insurance policy forms.
	Legislation has been enacted in Indiana, Iowa, Kentucky, Maryland, Montana, Nevada, New York, North Dakota, Rhode Island and Vermont, with varying effective dates (the “DMF Statutes”), that requires life insurance companies to compare on a regular basis their records for all in-force policies (including those policies issued prior to the effective dates of the legislation) against the database of reported deaths maintained by the Social Security Administration or a comparable database (a “Death Master File”). In contrast, New Mexico and Tennessee have enacted legislation that also requires such comparisons, but exempts life insurance companies, like Kemper’s life insurance subsidiaries (the “Life Companies”), that have not previously utilized a Death Master File, and instead only requires that such companies conduct Death Master File comparisons for life insurance policies issued and delivered in each of those states after the legislation’s effective date. Likewise, Alabama, Georgia and Mississippi have enacted statutes that require such comparisons, but only with respect to policies issued on or after their respective effective dates, without regard to prior Death Master File use. With respect to those DMF Statutes that apply retroactively and which would likely have an adverse effect on the Company’s operations and financial position, the Life Companies have filed declaratory judgment actions in applicable state courts challenging the application of such statutes to policies issued prior to the subject statute’s effective date:
	•	In November 2012, certain of the Life Companies filed a declaratory judgment action in Kentucky state court, asking the court to construe the Kentucky DMF Statute to apply only prospectively, i.e., only with respect to those life insurance policies issued in Kentucky on or after the effective date of the Kentucky DMF Statute, consistent with what the Life Companies believe are the requirements of applicable Kentucky statutory law, the Kentucky Constitution and the Contract Clause of the United States Constitution. In April 2013, the trial court denied the subject Life Companies’ motion for summary judgment and held that the requirements of the Kentucky DMF Statute apply to life insurance policies issued before the statute’s January 1, 2013 effective date. The subject Life Companies appealed the trial court’s decision and in August 2014, in a unanimous opinion, the Kentucky Court of Appeals reversed the trial court and held that the Kentucky DMF statute fell within Kentucky’s statutory presumption against retroactive legislation. Therefore, the Court ruled, the Kentucky DMF Statute can only apply to policies issued on and after January 1, 2013. In September 2014, the Kentucky Department of Insurance filed a motion asking for the Kentucky Supreme Court to undertake a discretionary review of the Court of Appeal’s ruling. A decision by the Kentucky Supreme Court on whether to review the Court of Appeals’ decision is expected by the third quarter of 2015.
	•	In July 2013, certain of the Life Companies filed a declaratory judgment action in state court in Maryland, asking the court to construe the Maryland DMF Statute to apply only prospectively, i.e., only to policies issued in Maryland after the effective date of the Maryland DMF Statute, consistent with what the Life Companies believe are the requirements of the Maryland Constitution and the Contract Clause of the United States Constitution. The Maryland Insurance Administration filed a motion to dismiss the action, contending that the subject Life Companies were required to exhaust their administrative remedies before filing their action in the trial court. In March 2014, the trial court granted the Maryland Insurance Administration’s motion. The Life Companies have appealed the trial court’s ruling. The Maryland appellate courts have declined to stay enforcement of the Maryland DMF Statute pending the appeal, and the Life Companies are complying with the Maryland DMF Statute while they continue to pursue their appeal. Oral argument on the Life Companies’ appeal before the Maryland Court of Special Appeals has been scheduled for December 2014. A decision by the Maryland Court of Special Appeals is unlikely before the second quarter of 2015.
	•	In August 2014, certain of the Life Companies filed a declaratory judgment action in Indiana state court, asking the court to construe the Indiana DMF Statute to apply only prospectively, i.e., only with respect to those life insurance policies issued in Indiana on or after the effective date of the Indiana DMF Statute, consistent with what the Life Companies believe are the requirements of applicable Indiana statutory law, the Indiana Constitution and the Contract Clause of the United States Constitution. The Indiana Department of Insurance filed an answer in response to the subject Life Companies’ complaint in October 2014.
	Note 12 - Contingencies (continued)
	The Life Companies are the subject of an unclaimed property compliance audit (the “Treasurers’ Audit”) being conducted by a private audit firm retained by the treasurers/controllers of 38 states (the “Audit Firm”). In July 2013, the California State Controller (the “CA Controller”) filed a complaint for injunctive relief against the Life Companies in state court in California, seeking an order requiring the Life Companies to produce all of their in-force policy records to the Audit Firm to enable the firm to perform a comparison of such records against a Death Master File and to ascertain whether any of the insureds under such policies may be deceased. In December 2013, the CA Controller filed a motion for preliminary injunction seeking the same injunctive relief. A hearing on that motion was continued by the court until November 2014 or until the California Court of Appeals rules on a preliminary injunction order issued in a related case involving an unaffiliated life insurance company, entitled Chiang v. American National Insurance Company (the “ANICO Appeal”), whichever is later. In July 2014, the court granted a motion by the CA Controller to stay the litigation in its entirety, including all discovery, pending a decision in the ANICO Appeal. As described below, the Life Companies have filed a counterclaim in this case against the CA Controller. The current stay of the Controller’s case against the Life Companies means that no substantive ruling is likely to occur until sometime in 2015. Pending the outcome of this litigation, the Life Companies have not produced any of their in-force policy records to the CA Controller.
	The Life Companies are the subject of a multi-state market conduct examination by six state insurance regulators that is focused on the Life Companies’ claim settlement and policy administration practices, and specifically their compliance with state unclaimed property statutes (the “Multi-State Exam”). The Multi-State Exam was originated in June 2012 as a single-state examination by the Illinois Director of Insurance. Insurance regulators from five additional states - California, Florida, Pennsylvania, New Hampshire and North Dakota - joined the examination in May 2013. In August 2014, New Hampshire withdrew from participation in the Multi-State Exam. In July 2013, the Life Companies received requests from the Illinois Department of Insurance, as the managing lead state for the Multi-State Exam, for a significant volume of information beyond that which the Company had already produced, including their records of all in-force policies and other information of the type previously requested by the Audit Firm as part of the Treasurers’ Audit and which is the subject of the CA Controller’s complaint. This request prompted the Illinois litigation noted below. The Multi-State Exam was dormant for almost one year. Then in August 2014, the Illinois Department of Insurance appointed a law firm to act as an additional examiner in the Multi-State Exam. In October 2014, this new examiner sent a letter to the Life Companies seeking requests for interviews, site visits and additional information and documents. The Life Companies are currently in the process of evaluating these requests.
	In September 2013, certain of the Life Companies filed declaratory judgment actions against the insurance regulators in the states of California, Florida, Illinois and Pennsylvania, asking the courts in those states to declare that applicable law does not require life insurers to search a Death Master File to ascertain whether insureds are deceased. The subject Life Companies are also asking the courts to declare that regulators in those states do not have the legal authority to (i) obtain life insurers’ policy records for the purpose of comparing those records against a Death Master File, and/or (ii) impose payment obligations on life insurers before a claim and due proof of death have been submitted by policy beneficiaries. The declaratory judgment action in California referenced above was filed as a cross-complaint to the CA Controller’s complaint, joining the California Insurance Commissioner and the Audit Firm as parties to the cross-complaint. The CA Controller has filed a motion to dismiss the Life Companies’ cross-complaint, contending that the Life Companies’ request for a declaratory judgment is premature and not ripe for adjudication. A hearing on that motion has been continued until November 2014 or until the Court of Appeals issues its decision in the ANICO Appeal, whichever is later. No date has been set for oral argument in the ANICO Appeal. In the meantime, the CA Controller filed a petition for coordination of the five unclaimed property lawsuits pending in CA to have them all heard by the same court. That petition has not yet been set for hearing. The Life Companies are currently evaluating their response to this petition.
	In response to the Illinois declaratory judgment action, the Illinois Department of Insurance and its Director (collectively, the “IDOI”) filed a motion to dismiss, and in July 2014, the court in Illinois denied, in part, such motion. Specifically, the court denied the IDOI’s motion to dismiss the Life Companies’ claim seeking a declaration that the IDOI cannot compel the Life Companies to provide their policy records to the IDOI or persons acting on the IDOI’s behalf so as to permit a comparison against the DMF for purposes of identifying deceased insureds, as well as the Life Companies’ associated claim for injunctive relief. The court dismissed with prejudice the other counts in the complaint. In August 2014, the IDOI filed its answer to the counts of the complaint that the Illinois court allowed to stand, and in October 2014, the Life Companies filed a motion for summary judgment with respect to those remaining counts. Formal briefing and a hearing schedule on the summary judgment motion are expected to be set by the court at a November 2014 status conference. The actions against the insurance regulators in the states of Florida and Pennsylvania have been stayed by agreement of the parties pending the outcome of the Illinois action.
	Note 12 - Contingencies (continued)
	The results of the aforementioned legislative actions, Treasurers’ Audit, Multi-State Exam and the foregoing litigation matters cannot currently be predicted. The Life Companies continue to maintain that states lack the legal authority to establish new requirements that have the effect of changing the terms of existing life insurance contracts with regard to basic claims handling obligations and processes. If these state officials are able to apply such new requirements retroactively to the Life Companies’ existing life insurance policies, it will fundamentally alter the nature and timing of their responsibilities under such policies by effectively eliminating contractual terms that condition claim settlement and payment on the receipt of a claim, including “due proof of death” of an insured. The outcomes of the various state initiatives and related litigation could have a significant effect on, including acceleration of, the Life Companies’ payment and/or escheatment of policy benefits, and significantly increase their claims handling costs. Due to the complexity and multi-jurisdictional nature of this issue, as well as the indeterminate number of potential outcomes and their uncertain effects on the Life Companies’ business, Kemper cannot reasonably estimate the amount of loss that it would recognize if the Life Companies were subjected to requirements of the types described in this Note on a retroactive basis.

Related_Parties

Related Parties	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
Related Parties	'
	Note 13 - Related Parties
	Mr. Christopher B. Sarofim, a director of Kemper, is Vice Chairman of Fayez Sarofim & Co. (“FS&C”), a registered investment advisory firm. Kemper’s subsidiary, Trinity, had $165.8 million in assets managed by FS&C at September 30, 2014 under an agreement with FS&C whereby FS&C provides investment management services with respect to certain assets of Trinity. Investment expenses incurred in connection with such agreement were $0.3 million for each of the nine month periods ended September 30, 2014 and 2013.
	FS&C also provides investment management services with respect to certain funds of the Company’s defined benefit pension plan. The Company’s defined benefit pension plan had $157.8 million in assets managed by FS&C at September 30, 2014 under an agreement with FS&C whereby FS&C provides investment management services. Investment expenses incurred in connection with such agreement were $0.3 million and $0.2 million for the nine months ended September 30, 2014 and 2013, respectively.
	With respect to the Company’s defined contribution plans, one of the alternative investment choices afforded to participating employees is the Dreyfus Appreciation Fund, an open-end, diversified managed investment fund. FS&C provides investment management services to the Dreyfus Appreciation Fund as a sub-investment advisor. The Company does not compensate FS&C for services provided to the Dreyfus Appreciation Fund. Participants in the Company’s defined contribution plans had allocated $22.6 million for investment in the Dreyfus Appreciation Fund at September 30, 2014, representing 6.4% of the total amount invested in the Company’s defined contribution plans at September 30, 2014.
	The Company believes that the services described above have been provided on terms no less favorable to the Company than could have been negotiated with non-affiliated third parties.

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]	'
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2014 by contractual maturity were:
	(Dollars in Millions)	Amortized Cost			Fair Value
	Due in One Year or Less	$	46.6		$	47.9
	Due after One Year to Five Years	728.5			777.4
	Due after Five Years to Ten Years	1,329.00			1,378.50
	Due after Ten Years	2,009.50			2,277.10
	Asset-backed Securities Not Due at a Single Maturity Date	204.9			216.3
	Investments in Fixed Maturities	$	4,318.50		$	4,697.20
Schedule of Unrealized Loss on Investments [Table Text Block]	'
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2013 is presented below.
		Less Than 12 Months						12 Months or Longer						Total
	(Dollars in Millions)	Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	95.8		$	(10.9	)	$	4.4		$	(0.8	)	$	100.2	$	(11.7	)
	States and Political Subdivisions	222.9			(20.1		)	2			(0.1		)	224.9		(20.2		)
	Corporate Securities:
	Bonds and Notes	699.8			(39.4		)	103.2			(8.3		)	803		(47.7		)
	Other Mortgage- and Asset-backed	13.9			(0.1		)	1.1			—			15		(0.1		)
	Total Fixed Maturities	1,032.40			(70.5		)	110.7			(9.2		)	1,143.10		(79.7		)
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	22.5			(2.5		)	2.5			—			25		(2.5		)
	Other Industries	4.3			(0.1		)	0.7			—			5		(0.1		)
	Common Stocks:
	Manufacturing	5			(0.1		)	0.2			—			5.2		(0.1		)
	Other Industries	14.2			(0.9		)	0.5			—			14.7		(0.9		)
	Other Equity Interests:
	Exchange Traded Funds	67.6			(1.0		)	—			—			67.6		(1.0		)
	Limited Liability Companies and Limited Partnerships	53.1			(0.9		)	5			(0.7		)	58.1		(1.6		)
	Total Equity Securities	166.7			(5.5		)	8.9			(0.7		)	175.6		(6.2		)
	Total	$	1,199.10		$	(76.0	)	$	119.6		$	(9.9	)	$	1,318.70	$	(85.9	)
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at September 30, 2014 is presented below.
		Less Than 12 Months						12 Months or Longer						Total
	(Dollars in Millions)	Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	24.3		$	(1.4	)	$	65.3		$	(4.0	)	$	89.6	$	(5.4	)
	States and Political Subdivisions	50.1			(0.1		)	154.8			(4.2		)	204.9		(4.3		)
	Corporate Securities:
	Bonds and Notes	250.8			(2.8		)	409.4			(15.6		)	660.2		(18.4		)
	Collateralized Loan Obligations	36.2			(0.3		)	2.2			(0.1		)	38.4		(0.4		)
	Other Mortgage- and Asset-backed	—			—			0.7			—			0.7		—
	Total Fixed Maturities	361.4			(4.6		)	632.4			(23.9		)	993.8		(28.5		)
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	5			—			12.1			(1.0		)	17.1		(1.0		)
	Other Industries	0.7			(0.1		)	0.7			—			1.4		(0.1		)
	Common Stocks:
	Manufacturing	30.8			(1.1		)	0.3			—			31.1		(1.1		)
	Other Industries	12			(0.7		)	—			—			12		(0.7		)
	Other Equity Interests:
	Exchange Traded Funds	51.2			(0.2		)	14.5			(0.4		)	65.7		(0.6		)
	Limited Liability Companies and Limited Partnerships	74.8			(2.0		)	2.4			(0.3		)	77.2		(2.3		)
	Total Equity Securities	174.5			(4.1		)	30			(1.7		)	204.5		(5.8		)
	Total	$	535.9		$	(8.7	)	$	662.4		$	(25.6	)	$	1,198.30	$	(34.3	)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]	'
	The following table sets forth the pre-tax amount of other-than-temporary-impairment (“OTTI”) credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of the dates indicated, for which the portion of the OTTI loss related to factors other than credit has been recognized in Accumulated Other Comprehensive Income, and the corresponding changes in such amounts.
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Balance at Beginning of Period	$	9.9		$	4.6		$	12.9		$	4.4
	Additions for Previously Unrecognized OTTI Credit Losses	2.4			1.8			—			0.8
	Increases to Previously Recognized OTTI Credit Losses	0.6			1.3			—			1.3
	Reductions for Change in Impairment Status:
	From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell	(2.4		)	(3.2		)	(2.4		)	(2.1		)
	Reductions for Investments Sold During Period	—			(0.1		)	—			—
	Balance at End of Period	$	10.5		$	4.4		$	10.5		$	4.4
Schedule of Realized Gain (Loss) [Table Text Block]	'
	Gross gains and losses on sales of investments in fixed maturities and equity securities for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Fixed Maturities:
	Gains on Sales	$	5		$	29.6		$	0.2		$	2.5
	Equity Securities:
	Gains on Sales	11.7			1.9			7.9			0.7
	Losses on Sales	—			(0.3		)	—			(0.2		)
Schedule of Other Investments [Table Text Block]	'
	The carrying values of the Company’s Other Investments at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,			Dec 31,
		2014			2013
	Loans to Policyholders at Unpaid Principal	$	280.8		$	275.4
	Real Estate at Depreciated Cost	164.3			167.1
	Trading Securities at Fair Value	5			5
	Other	0.4			0.5
	Total	$	450.5		$	448
Fixed Maturities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	'
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2013 were:
		Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)	Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities	$	351.1		$	22.8		$	(11.7	)	$	362.2
	States and Political Subdivisions	1,327.40			53.8			(20.2		)	1,361.00
	Corporate Securities:
	Bonds and Notes	2,636.40			205			(47.7		)	2,793.70
	Redeemable Preferred Stocks	6.6			0.8			—			7.4
	Collateralized Loan Obligations	44.2			0.5			—			44.7
	Other Mortgage- and Asset-backed	4.8			1.3			(0.1		)	6
	Investments in Fixed Maturities	$	4,370.50		$	284.2		$	(79.7	)	$	4,575.00
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2014 were:
		Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)	Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities	$	320.4		$	28.5		$	(5.4	)	$	343.5
	States and Political Subdivisions	1,336.00			107.5			(4.3		)	1,439.20
	Corporate Securities:
	Bonds and Notes	2,589.40			268			(18.4		)	2,839.00
	Redeemable Preferred Stocks	6.2			1.2			—			7.4
	Collateralized Loan Obligations	62.5			0.4			(0.4		)	62.5
	Other Mortgage- and Asset-backed	4			1.6			—			5.6
	Investments in Fixed Maturities	$	4,318.50		$	407.2		$	(28.5	)	$	4,697.20
Equity Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	'
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2013 were:
					Gross Unrealized
	(Dollars in Millions)	Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate	$	85.4		$	2.9		$	(2.5	)	$	85.8
	Other Industries	20.1			4.4			(0.1		)	24.4
	Common Stocks:
	Manufacturing	83.4			21.3			(0.1		)	104.6
	Other Industries	68.8			17			(0.9		)	84.9
	Other Equity Interests:
	Exchange Traded Funds	122			3.9			(1.0		)	124.9
	Limited Liability Companies and Limited Partnerships	150.3			25.2			(1.6		)	173.9
	Investments in Equity Securities	$	530		$	74.7		$	(6.2	)	$	598.5
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at September 30, 2014 were:
					Gross Unrealized
	(Dollars in Millions)	Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate	$	85.5		$	4.9		$	(1.0	)	$	89.4
	Other Industries	20.2			5.6			(0.1		)	25.7
	Common Stocks:
	Manufacturing	84.8			25.9			(1.1		)	109.6
	Other Industries	67.3			22.6			(0.7		)	89.2
	Other Equity Interests:
	Exchange Traded Funds	125.2			5.2			(0.6		)	129.8
	Limited Liability Companies and Limited Partnerships	164.3			55.7			(2.3		)	217.7
	Investments in Equity Securities	$	547.3		$	119.9		$	(5.8	)	$	661.4

Property_and_Casualty_Insuranc1

Property and Casualty Insurance Reserves (Tables)	9 Months Ended
	Sep. 30, 2014
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]	'
Liability for Unpaid Claims Adjustment Expense by Expense Type [Table Text Block]	'
	Property and casualty insurance reserve activity for the nine months ended September 30, 2014 and 2013 was:
		Nine Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,
		2014			2013
	Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	843.5		$	970.6
	Less Reinsurance Recoverables at Beginning of Year	63.4			66.2
	Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	780.1			904.4
	Incurred Losses and LAE Related to:
	Current Year:
	Continuing Operations	756.9			811.1
	Prior Years:
	Continuing Operations	(44.7		)	(43.2		)
	Discontinued Operations	(0.2		)	(4.5		)
	Total Incurred Losses and LAE Related to Prior Years	(44.9		)	(47.7		)
	Total Incurred Losses and LAE	712			763.4
	Paid Losses and LAE Related to:
	Current Year:
	Continuing Operations	460.3			485.8
	Prior Years:
	Continuing Operations	302.6			354.4
	Discontinued Operations	6.5			9.8
	Total Paid Losses and LAE Related to Prior Years	309.1			364.2
	Total Paid Losses and LAE	769.4			850
	Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	722.7			817.8
	Plus Reinsurance Recoverables at End of Period	58.2			66.8
	Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	$	780.9		$	884.6

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt Instruments [Table Text Block]	'
	The amortized cost of debt outstanding at September 30, 2014 and December 31, 2013 was:
	(Dollars in Millions)	Sep 30,			Dec 31,
		2014			2013
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	249.4		$	249
	6.00% Senior Notes due May 15, 2017	358.3			357.9
	7.375% Subordinated Debentures due February 27, 2054	144.2			—
	Total Debt Outstanding	$	751.9		$	606.9
Schedule of Interest Expense [Table Text Block]	'
	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Notes Payable under Revolving Credit Agreement	$	0.6		$	0.9		$	0.2		$	0.3
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	11.6			11.6			3.9			3.9
	6.00% Senior Notes due May 15, 2017	16.6			16.6			5.5			5.5
	7.375% Subordinated Debentures due February 27, 2054	6.6			—			2.8			—
	Mortgage Note Payable	—			0.2			—			—
	Interest Expense before Capitalization of Interest	35.4			29.3			12.4			9.7
	Capitalization of Interest	(0.8		)	(0.7		)	(0.3		)	(0.2		)
	Total Interest Expense	$	34.6		$	28.6		$	12.1		$	9.5
Schedule of Interest Paid [Table Text Block]	'
	Interest paid, including facility fees, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Notes Payable under Revolving Credit Agreement	$	0.5		$	0.6		$	0.2		$	0.4
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	7.5			7.5			—			—
	6.00% Senior Notes due May 15, 2017	10.8			10.8			—			—
	7.375% Subordinated Debentures due February 27, 2054	5.5			—			2.7			—
	Mortgage Note Payable	—			0.3			—			0.1
	Total Interest Paid	$	24.3		$	19.2		$	2.9		$	0.5

Longterm_Equitybased_Compensat1

Long-term Equity-based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
	The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the nine months ended September 30, 2014 and 2013 were as follows:
		Nine Months Ended
		Sep 30, 2014					Sep 30, 2013
	Range of Valuation Assumptions
	Expected Volatility	25.76	%	-	44.43	%	39.1	%	-	48.23	%
	Risk-free Interest Rate	1.07		-	2.14		0.62		-	1.38
	Expected Dividend Yield	2.53		-	2.6		2.83		-	3
	Weighted-Average Expected Life in Years
	Employee Grants	4		-	7		4		-	7
	Director Grants	6					6
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	'
	Tandem Award activity for the nine months ended September 30, 2014 is presented below.
		Shares Subject			Weighted-			Weighted-		Aggregate
		to Award			Average			Average		Intrinsic Value
					Exercise Price			Remaining		($ in Millions)
					Per Share ($)			Contractual Life
								(in Years)
	Outstanding at Beginning of the Year	2,543,673			$	41.37
	Granted	289,000			36.59
	Exercised	(26,375	)		28.76
	Forfeited or Expired	(492,248	)		47.56
	Outstanding at September 30, 2014	2,314,050			$	39.61		4.2		$	3.1
	Vested and Expected to Vest at September 30, 2014	2,289,388			$	39.67		4.16		$	3.1
	Exercisable at September 30, 2014	1,970,046			$	40.49		3.41		$	2.8
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	'
	Information pertaining to Tandem Awards outstanding at September 30, 2014 is presented below.
								Outstanding						Exercisable
	Range of Exercise Prices							Shares			Weighted-		Weighted-	Shares	Weighted-
								Subject to Award			Average		Average	Subject to Tandem	Average
											Exercise Price		Remaining	Award	Exercise Price
											Per Share ($)		Contractual		Per Share ($)
													Life (in Years)
	$	10		-	$	15		16,750			$	13.55	2.7	16,750	$	13.55
	15.01			-	20			8,000			16.48		4.6	8,000	16.48
	20.01			-	25			30,750			23.38		4.18	30,750	23.38
	25.01			-	30			389,000			28.85		6.71	339,248	28.74
	30.01			-	35			243,750			33.18		8.29	140,500	32.98
	35.01			-	40			586,625			36.9		6.26	395,623	37.11
	40.01			-	45			185,902			43.1		0.34	185,902	43.1
	45.01			-	50			796,505			48.59		1.41	796,505	48.59
	50.01			-	55			56,768			51.16		0.35	56,768	51.16
	10			-	55			2,314,050			39.61		4.2	1,970,046	40.49
Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan, Activity [Table Text Block]	'
	Activity related to DSU awards for the nine months ended September 30, 2014 was as follows:
		Number of DSUs			Weighted-
					Average
					Grant-Date
					Fair Value
					Per DSU
	Vested Balance at Beginning of the Year	4,000			$	31.5
	Granted and Vested	4,000			37.53
	Vested Balance at End of Period	8,000			34.52
Time Vested Shares [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	'
	Activity related to nonvested time-based restricted stock and nonvested time-based RSUs for the nine months ended September 30, 2014 was as follows:
		Time-based Restricted						Time-based RSU Awards
		Stock Awards
		Number of Shares			Weighted-			Number of RSUs			Weighted-
					Average						Average
					Grant-Date						Grant-Date
					Fair Value						Fair Value
					Per Share						Per RSU
	Nonvested Balance at Beginning of the Year	101,627			$	31.48		—			$	—
	Granted	2,000			38.59			41,925			36.56
	Vested	(25,568	)		30.56			(9,351	)		36.47
	Forfeited	(21,789	)		31			(1,500	)		36.47
	Nonvested Balance at End of Period	56,270			32.33			31,074			36.6
Performance Shares [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	'
	Activity related to nonvested performance-based restricted stock and nonvested performance-based RSUs for the nine months ended September 30, 2014 was as follows:
		Performance-based Restricted Stock Awards						Performance-based RSU Awards
		Number of Shares			Weighted-			Number of RSUs			Weighted-
					Average						Average
					Grant-Date						Grant-Date
					Fair Value						Fair Value
					Per Share						Per RSU
	Nonvested Balance at Beginning of the Year	176,800			$	39.54		—			$	—
	Granted	—			—			66,575			40.5
	Vested	(54,934	)		39.83			—			—
	Forfeited	(7,691	)		40.12			(1,400	)		40.5
	Nonvested Balance at End of Period	114,175			39.37			65,175			40.5

Income_from_Continuing_Operati1

Income from Continuing Operations Per Unrestricted Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	'
	A reconciliation of the numerator and denominator used in the calculation of Basic Income from Continuing Operations Per Unrestricted Share and Diluted Income from Continuing Operations Per Unrestricted Share for the nine and three months ended September 30, 2014 and 2013 is as follows:
		Nine Months Ended						Three Months Ended
		Sep 30,			Sep 30,			Sep 30,		Sep 30,
		2014			2013			2014		2013
	(Dollars in Millions)
	Income from Continuing Operations	$	49.3		$	159.7		$	4.8	$	68.6
	Less Income from Continuing Operations Attributed to Participating Awards	0.2			0.8			—		0.3
	Income from Continuing Operations Attributed to Unrestricted Shares	49.1			158.9			4.8		68.3
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—			—			—		—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	49.1		$	158.9		$	4.8	$	68.3
	(Number of Shares in Thousands)
	Weighted-average Unrestricted Shares Outstanding	54,245.70			57,374.40			52,605.30		56,365.80
	Equity-based Compensation Equivalent Shares	110.5			118.8			94.6		135.7
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	54,356.20			57,493.20			52,699.90		56,501.50
	(Per Unrestricted Share in Whole Dollars)
	Basic Income from Continuing Operations Per Unrestricted Share	$	0.9		$	2.77		$	0.09	$	1.21
	Diluted Income from Continuing Operations Per Unrestricted Share	$	0.9		$	2.76		$	0.09	$	1.21
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	'
	The number of shares of Kemper common stock that were excluded from the calculations of Equity-based Compensation Equivalent Shares and Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution for the nine and three months ended September 30, 2014 and 2013 because the exercise prices for the options exceeded the average market price is presented below.
		Nine Months Ended					Three Months Ended
	(Number of Shares in Thousands)	Sep 30,		Sep 30,			Sep 30,		Sep 30,
		2014		2013			2014		2013
	Equity-based Compensation Equivalent Shares	1,540.60		2,194.00			1,830.50		2,125.80
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,540.60		2,194.00			1,830.50		2,125.80

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]	'
Schedule of Comprehensive Income [Table Text Block]	'
	The components of Other Comprehensive Income Tax Benefit (Expense) for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Other Comprehensive Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	$	(80.6	)	$	104.1		$	(2.6	)	$	11.9
	Reclassification Adjustment for Amounts Included in Net Income	2.8			8.7			1.5			(0.1		)
	Unrealized Holding Gains and Losses	(77.8		)	112.8			(1.1		)	11.8
	Foreign Currency Translation Adjustment	0.3			—			0.2			—
	Amortization of Unrecognized Postretirement Benefit Costs	(2.1		)	(6.5		)	(0.7		)	(2.3		)
	Other Comprehensive Income Tax Benefit (Expense)	$	(79.6	)	$	106.3		$	(1.6	)	$	9.5
	The components of Other Comprehensive Income (Loss) Before Income Taxes for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$	228.5		$	(291.5	)	$	7.2		$	(33.8	)
	Reclassification Adjustment for Amounts Included in Net Income	(8.0		)	(24.9		)	(4.3		)	0.4
	Unrealized Holding Gains (Losses)	220.5			(316.4		)	2.9			(33.4		)
	Foreign Currency Translation Adjustments	(0.7		)	0.1			(0.5		)	0.2
	Amortization of Unrecognized Postretirement Benefit Costs	5.9			18.4			2			6.3
	Other Comprehensive Income (Loss) Before Income Taxes	$	225.7		$	(297.9	)	$	4.4		$	(26.9	)
Schedule of Accumulated Other Comprehensive Income [Table Text Block]	'
	The components of Accumulated Other Comprehensive Income (“AOCI”) at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,			Dec 31,
		2014			2013
	Net Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	1		$	0.3
	Other Net Unrealized Gains on Investments	317.5			175.5
	Foreign Currency Translation Adjustments, Net of Income Taxes	0.4			0.8
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(37.5		)	(41.3		)
	Accumulated Other Comprehensive Income	$	281.4		$	135.3
Reclassification out of Accumulated Comprehensive Income [Table Text Block]	'
	Components of AOCI were reclassified to the following lines of the Condensed Consolidated Statements of Income for the nine and three months ended September 30, 2014 and 2013:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Reclassification of AOCI from Net Unrealized Gains on Investments to:
	Net Realized Gains on Sales of Investments	$	16.7		$	31.2		$	8.1		$	3
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Total Before Income Taxes	8			24.9			4.3			(0.4		)
	Income Tax Benefit (Expense)	(2.8		)	(8.7		)	(1.5		)	0.1
	Reclassification from AOCI, Net of Income Taxes	5.2			16.2			2.8			(0.3		)
	Reclassification of AOCI from Amortization of Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(5.9		)	(18.4		)	(2.0		)	(6.3		)
	Income Tax Benefit	2.1			6.5			0.7			2.3
	Reclassification from AOCI, Net of Income Taxes	(3.8		)	(11.9		)	(1.3		)	(4.0		)
	Total Reclassification from AOCI to Net Income	$	1.4		$	4.3		$	1.5		$	(4.3	)

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Current and Deferred Income Tax Assets [Table Text Block]	'
	Current and Deferred Income Tax Assets at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,		Dec 31,
		2014		2013
	Current Income Tax Assets	$	4.3	$	—
	Deferred Income Tax Assets	—		31.8
	Current and Deferred Income Tax Assets	$	4.3	$	31.8
Schedule of Components of Income Tax Liabilities [Table Text Block]	'
	The components of Liabilities for Income Taxes at September 30, 2014 and December 31, 2013 were:
	(Dollars in Millions)	Sep 30,		Dec 31,
		2014		2013
	Current Income Tax Liabilities	$	—	$	1.5
	Deferred Income Tax Liabilities	41.7		—
	Unrecognized Tax Benefits	7		6.8
	Liabilities for Income Taxes	$	48.7	$	8.3

Pension_Benefits_and_Postretir1

Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)	9 Months Ended
	Sep. 30, 2014
Pension Plans [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	'
	The components of Pension Expense for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Service Cost Earned	$	6.5		$	8.1		$	2.1		$	2.7
	Interest Cost on Projected Benefit Obligation	18.6			16.8			6.2			5.6
	Expected Return on Plan Assets	(26.2		)	(22.3		)	(8.7		)	(7.4		)
	Amortization of Accumulated Unrecognized Actuarial Loss	7.3			19.7			2.5			6.6
	Total Pension Expense Recognized	$	6.2		$	22.3		$	2.1		$	7.5
Postretirement Benefits Other than Pensions [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	'
	The components of Postretirement Benefits Other than Pensions Expense for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Service Cost on Benefits Earned	$	0.1		$	0.1		$	—		$	—
	Interest Cost on Projected Benefit Obligation	0.9			0.9			0.3			0.3
	Amortization of Accumulated Unrecognized Actuarial Gain	(1.4		)	(0.9		)	(0.5		)	(0.3		)
	Total Postretirement Benefits Other than Pensions Expense	$	(0.4	)	$	0.1		$	(0.2	)	$	—

Business_Segments_Tables

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	'
	Segment Revenues, including a reconciliation to Total Revenues, for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	949.5		$	1,054.70		$	309.7		$	348.7
	Net Investment Income	55.6			67.9			18.5			21.3
	Other Income	0.4			0.4			0.1			0.1
	Total Property & Casualty Insurance	1,005.50			1,123.00			328.3			370.1
	Life & Health Insurance:
	Earned Premiums	461.2			475.5			153.1			158.8
	Net Investment Income	147.4			159.3			49.2			56.5
	Other Income	0.4			0.1			0.4			—
	Total Life & Health Insurance	609			634.9			202.7			215.3
	Total Segment Revenues	1,614.50			1,757.90			531			585.4
	Net Realized Gains on Sales of Investments	18.1			78.3			8			49.1
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Other	13			10.6			4.6			4.6
	Total Revenues	$	1,636.90		$	1,840.50		$	539.8		$	635.7
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	'
	Segment Operating Profit, including a reconciliation to Income from Continuing Operations before Income Taxes, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Segment Operating Profit (Loss):
	Property & Casualty Insurance	$	(8.9	)	$	98		$	(23.9	)	$	32.2
	Life & Health Insurance	90.7			98.3			31.4			35.2
	Total Segment Operating Profit	81.8			196.3			7.5			67.4
	Corporate and Other Operating Loss	(24.1		)	(35.3		)	(7.7		)	(11.1		)
	Total Operating Profit (Loss)	57.7			161			(0.2		)	56.3
	Net Realized Gains on Sales of Investments	18.1			78.3			8			49.1
	Net Impairment Losses Recognized in Earnings	(8.7		)	(6.3		)	(3.8		)	(3.4		)
	Income from Continuing Operations before Income Taxes	$	67.1		$	233		$	4		$	102
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]	'
	Segment Net Operating Income, including a reconciliation to Income from Continuing Operations, for the nine and three months ended September 30, 2014 and 2013 was:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Segment Net Operating Income (Loss):
	Property & Casualty Insurance	$	(0.4	)	$	71.5		$	(13.6	)	$	23.4
	Life & Health Insurance	58.3			64.4			20.3			22.9
	Total Segment Net Operating Income	57.9			135.9			6.7			46.3
	Corporate and Other Net Operating Loss	(14.7		)	(23.0		)	(4.6		)	(7.4		)
	Consolidated Net Operating Income	43.2			112.9			2.1			38.9
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	11.8			50.9			5.2			31.9
	Net Impairment Losses Recognized in Earnings	(5.7		)	(4.1		)	(2.5		)	(2.2		)
	Income from Continuing Operations	$	49.3		$	159.7		$	4.8		$	68.6
Revenue from External Customers by Products and Services [Table Text Block]	'
	Earned Premiums by product line for the nine and three months ended September 30, 2014 and 2013 were:
		Nine Months Ended						Three Months Ended
	(Dollars in Millions)	Sep 30,			Sep 30,			Sep 30,			Sep 30,
		2014			2013			2014			2013
	Personal Automobile	$	633.4		$	729.4		$	205.1		$	239.1
	Homeowners	236.6			244.8			77.9			82.3
	Other Personal Property and Casualty Insurance	96.2			101.2			31.8			33.5
	Commercial Automobile	40.8			38.7			14.1			13.5
	Life	291.6			294.9			96.8			98.4
	Accident and Health	112.1			121.2			37.1			40.7
	Total Earned Premiums	$	1,410.70		$	1,530.20		$	462.8		$	507.5

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]	'
	The valuation of assets measured at fair value in the Company’s Condensed Consolidated Balance Sheet at September 30, 2014 is summarized below.
		Fair Value Measurements
	(Dollars in Millions)	Quoted Prices				Significant Other				Significant			Total Fair Value
		in Active Markets				Observable				Unobservable
		for Identical Assets				Inputs				Inputs
		(Level 1)				(Level 2)				(Level 3)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	124.4			$	219.1			$	—		$	343.5
	States and Political Subdivisions	—				1,439.20				—			1,439.20
	Corporate Securities:
	Bonds and Notes	—				2,498.00				341			2,839.00
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				62.5			62.5
	Other Mortgage- and Asset-backed	—				1.6				4			5.6
	Total Investments in Fixed Maturities	124.4				4,157.90				414.9			4,697.20
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				84.4				5			89.4
	Other Industries	—				11				14.7			25.7
	Common Stocks:
	Manufacturing	101				7.5				1.1			109.6
	Other Industries	72.5				2.3				14.4			89.2
	Other Equity Interests:
	Exchange Traded Funds	129.8				—				—			129.8
	Limited Liability Companies and Limited Partnerships	—				—				217.7			217.7
	Total Investments in Equity Securities	303.3				105.2				252.9			661.4
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				50.6			50.6
	Other Investments:
	Trading Securities	5				—				—			5
	Total	$	432.7			$	4,263.10			$	718.4		$	5,414.20
	The valuation of assets measured at fair value in the Company’s Condensed Consolidated Balance Sheet at December 31, 2013 is summarized below.
		Fair Value Measurements
	(Dollars in Millions)	Quoted Prices				Significant Other				Significant			Total Fair Value
		in Active Markets				Observable				Unobservable
		for Identical Assets				Inputs				Inputs
		(Level 1)				(Level 2)				(Level 3)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	121.2			$	241			$	—		$	362.2
	States and Political Subdivisions	—				1,361.00				—			1,361.00
	Corporate Securities:
	Bonds and Notes	—				2,429.60				364.1			2,793.70
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				44.7			44.7
	Other Mortgage- and Asset-backed	—				1.5				4.5			6
	Total Investments in Fixed Maturities	121.2				4,033.10				420.7			4,575.00
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				80.8				5			85.8
	Other Industries	—				10.5				13.9			24.4
	Common Stocks:
	Manufacturing	95.1				7.3				2.2			104.6
	Other Industries	71.7				2.2				11			84.9
	Other Equity Interests:
	Exchange Traded Funds	124.9				—				—			124.9
	Limited Liability Companies and Limited Partnerships	—				—				173.9			173.9
	Total Investments in Equity Securities	291.7				100.8				206			598.5
	Other Investments:
	Trading Securities	5				—				—			5
	Total	$	417.9			$	4,133.90			$	626.7		$	5,178.50
Fair Value Inputs, Assets, Quantitative Information [Table Text Block]	'
	The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at September 30, 2014.
	(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
	Investment-grade	Market Yield		$	113.7			0.7	%	-	5.9	%	3.9	%
	Non-investment-grade:
	Senior Debt	Market Yield		87.3				3.4		-	15.5		9.8
	Junior Debt	Market Yield		129.9				5.4		-	25.9		13.3
	Collateralized Loan Obligations	Market Yield		62.5				2		-	7.5		4.7
	Other	Various		21.5
	Total Fixed Maturity Investments in Corporate Securities			$	414.9
	Note 11 - Fair Value Measurements (continued)
	The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2013.
	DOLLARS IN MILLIONS	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
	Investment-grade	Market Yield		$	108.5			1	%	-	6	%	4.3	%
	Non-investment-grade:
	Senior Debt	Market Yield		93.9				4.2		-	15.6		8.6
	Junior Debt	Market Yield		153.5				8.8		-	26.6		14.2
	Collateralized Loan Obligations	Market Yield		44.7				3.2		-	6.8		4.3
	Other Debt	Various		20.1
	Total Fixed Maturity Investments in Corporate Securities			$	420.7
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the nine months ended September 30, 2014 is presented below.
		Fixed Maturities														Equity Securities
	(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair			Total
		Bonds				Preferred							and Asset-			and			Equity			Value
		and Notes				Stocks							backed			Common			Interests			Option
																Stocks
	Balance at Beginning of Period	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	—		$	626.7
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	(4.1		)		—				0.1			0.1			3.1			—			0.6			(0.2		)
	Included in Other Comprehensive Income	4				0.4				(0.4		)	0.2			3			29.7			—			36.9
	Purchases	117.6				—				18.1			—			2.8			38.6			50			227.1
	Settlements	(92.4		)		(0.4		)		—			(0.8		)	(3.6		)	(21.8		)	—			(119.0		)
	Sales	(47.6		)		—				—			—			(2.2		)	(2.7		)	—			(52.5		)
	Transfers out of Level 3	(0.6		)		—				—			—			—			—			—			(0.6		)
	Balance at End of Period	$	341			$	7.4			$	62.5		$	4		$	35.2		$	217.7		$	50.6		$	718.4
	Note 11 - Fair Value Measurements (continued)
	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the three months ended September 30, 2014 is presented below.
		Fixed Maturities														Equity Securities
	(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair			Total
		Bonds				Preferred							and Asset-			and			Equity			Value
		and Notes				Stocks							backed			Common			Interests			Option
																Stocks
	Balance at Beginning of Period	$	384.8			$	7.1			$	49.5		$	3.9		$	36.3		$	194.4		$	40.3		$	716.3
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	(1.8		)		—				—			—			0.8			0.3			0.3			(0.4		)
	Included in Other Comprehensive Income	(1.4		)		0.5				(0.3		)	0.1			1			19.2			—			19.1
	Purchases	31.7				—				13.3			—			0.1			12.3			10			67.4
	Settlements	(41.6		)		(0.2		)		—			—			(0.8		)	(8.2		)	—			(50.8		)
	Sales	(30.7		)		—				—			—			(2.2		)	(0.3		)	—			(33.2		)
	Balance at End of Period	$	341			$	7.4			$	62.5		$	4		$	35.2		$	217.7		$	50.6		$	718.4
	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the nine months ended September 30, 2013 is presented below.
		Fixed Maturities														Equity Securities
	(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Total
		Bonds				Preferred							and Asset-			and Common			Equity
		and Notes				Stocks							backed			Stocks			Interests
	Balance at Beginning of Period	$	361			$	4.7			$	—		$	0.1		$	13.3		$	141.3		$	520.4
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	(2.7		)		(0.4		)		0.1			—			(1.0		)	0.1			(3.9		)
	Included in Other Comprehensive Income	(7.2		)		(0.1		)		—			(0.3		)	3.9			(1.6		)	(5.3		)
	Purchases	92.9				5.1				41.2			4.6			0.6			34.5			178.9
	Settlements	(94.1		)		(0.1		)		—			(0.1		)	—			(20.3		)	(114.6		)
	Sales	(0.5		)		—				—			—			(0.7		)	—			(1.2		)
	Transfers into Level 3	5.8				—				—			2.4			—			—			8.2
	Transfers out of Level 3	(5.8		)		—				—			—			—			—			(5.8		)
	Balance at End of Period	$	349.4			$	9.2			$	41.3		$	6.7		$	16.1		$	154		$	576.7
	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the three months ended September 30, 2013 is presented below.
		Fixed Maturities														Equity Securities
	(Dollars in Millions)	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Total
		Bonds				Preferred							and Asset-			and Common			Equity
		and Notes				Stocks							backed			Stocks			Interests
	Balance at Beginning of Period	$	351.5			$	4.3			$	29.8		$	6.7		$	16.6		$	147.3		$	556.2
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	(1.8		)		—				—			—			(0.9		)	0.3			(2.4		)
	Included in Other Comprehensive Income	0.9				(0.1		)		0.4			(0.1		)	0.8			(0.8		)	1.1
	Purchases	17.3				5.1				11.1			0.1			—			16.5			50.1
	Settlements	(21.0		)		(0.1		)		—			—			—			(9.3		)	(30.4		)
	Sales	(0.5		)		—				—			—			(0.4		)	—			(0.9		)
	Transfers into Level 3	3				—				—			—			—			—			3
	Balance at End of Period	$	349.4			$	9.2			$	41.3		$	6.7		$	16.1		$	154		$	576.7

Investments_Schedule_of_Invest

Investments - Schedule of Investments (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	$4,318,500,000	'	$4,370,500,000
Available-for-sale Debt Securities, Fair Value	4,697,200,000	'	4,575,000,000
Available for sale Securities, Equity Securities, Cost	547,300,000	'	530,000,000
Available for sale Securities, Equity Securities, Fair Value	661,400,000	'	598,500,000
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Due in One Year or Less - Amortized Cost	46,600,000	'	'
Due in One Year or Less - Fair Value	47,900,000	'	'
Due after One Year to Five Years - Amortized Cost	728,500,000	'	'
Due after One Year to Five Years - Fair Value	777,400,000	'	'
Due after Five Years to Ten Years - Amortized Cost	1,329,000,000	'	'
Due after Five Years to Ten Years - Fair Value	1,378,500,000	'	'
Due after Ten Years - Amortized Cost	2,009,500,000	'	'
Due after Ten Years - Fair Value	2,277,100,000	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Amortized Cost	204,900,000	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	216,300,000	'	'
Other Receivables	247,500,000	'	193,100,000
Other Liabilities	390,300,000	'	329,800,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	535,900,000	'	1,199,100,000
Less Than 12 Months, Unrealized Losses	-8,700,000	'	-76,000,000
12 Months or Longer, Fair Value	662,400,000	'	119,600,000
12 Months or Longer, Unrealized Losses	-25,600,000	'	-9,900,000
Total, Fair Value	1,198,300,000	'	1,318,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-34,300,000	'	-85,900,000
Less Than 12 Months, Fair Value	0	'	0
Available For Sale Securities, Continuous Unrealized Loss Position, Credit Losses Recognized Related to Securites in An Unrealized Loss Position, In a Position of 12 Months or Longer	300,000	'	300,000
Purchases of Fair Value Option Investments	52,900,000	0	'
Sales of Fair Value Option Investments	2,900,000	0	'
Fair Value Option Investments	50,600,000	'	0
Fixed Maturities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	4,318,500,000	'	4,370,500,000
Available-for-sale Debt Securities Gross Unrealized Gain	407,200,000	'	284,200,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-28,500,000	'	-79,700,000
Available-for-sale Debt Securities, Fair Value	4,697,200,000	'	4,575,000,000
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Other Receivables	0	'	2,500,000
Other Liabilities	6,800,000	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	361,400,000	'	1,032,400,000
Less Than 12 Months, Unrealized Losses	-4,600,000	'	-70,500,000
12 Months or Longer, Fair Value	632,400,000	'	110,700,000
12 Months or Longer, Unrealized Losses	-23,900,000	'	-9,200,000
Total, Fair Value	993,800,000	'	1,143,100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-28,500,000	'	-79,700,000
US Government and Government Agencies and Authorities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	320,400,000	'	351,100,000
Available-for-sale Debt Securities Gross Unrealized Gain	28,500,000	'	22,800,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-5,400,000	'	-11,700,000
Available-for-sale Debt Securities, Fair Value	343,500,000	'	362,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	24,300,000	'	95,800,000
Less Than 12 Months, Unrealized Losses	-1,400,000	'	-10,900,000
12 Months or Longer, Fair Value	65,300,000	'	4,400,000
12 Months or Longer, Unrealized Losses	-4,000,000	'	-800,000
Total, Fair Value	89,600,000	'	100,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-5,400,000	'	-11,700,000
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]	'	'	'
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	138,300,000	'	'
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]	'	'	'
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	9,600,000	'	'
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]	'	'	'
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	300,000	'	'
Other Non-Governmental Issuers [Member]	'	'	'
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	68,100,000	'	'
States and Political Subdivisions [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	1,336,000,000	'	1,327,400,000
Available-for-sale Debt Securities Gross Unrealized Gain	107,500,000	'	53,800,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-4,300,000	'	-20,200,000
Available-for-sale Debt Securities, Fair Value	1,439,200,000	'	1,361,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	50,100,000	'	222,900,000
Less Than 12 Months, Unrealized Losses	-100,000	'	-20,100,000
12 Months or Longer, Fair Value	154,800,000	'	2,000,000
12 Months or Longer, Unrealized Losses	-4,200,000	'	-100,000
Total, Fair Value	204,900,000	'	224,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-4,300,000	'	-20,200,000
Bonds and Notes [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	2,589,400,000	'	2,636,400,000
Available-for-sale Debt Securities Gross Unrealized Gain	268,000,000	'	205,000,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-18,400,000	'	-47,700,000
Available-for-sale Debt Securities, Fair Value	2,839,000,000	'	2,793,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	250,800,000	'	699,800,000
Less Than 12 Months, Unrealized Losses	-2,800,000	'	-39,400,000
12 Months or Longer, Fair Value	409,400,000	'	103,200,000
12 Months or Longer, Unrealized Losses	-15,600,000	'	-8,300,000
Total, Fair Value	660,200,000	'	803,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-18,400,000	'	-47,700,000
Redeemable Preferred Stocks [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	6,200,000	'	6,600,000
Available-for-sale Debt Securities Gross Unrealized Gain	1,200,000	'	800,000
Available-for-sale Debt Securities, Gross Unrealized Loss	0	'	0
Available-for-sale Debt Securities, Fair Value	7,400,000	'	7,400,000
Collateralized Loan Obligations [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	62,500,000	'	44,200,000
Available-for-sale Debt Securities Gross Unrealized Gain	400,000	'	500,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-400,000	'	0
Available-for-sale Debt Securities, Fair Value	62,500,000	'	44,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	36,200,000	'	'
Less Than 12 Months, Unrealized Losses	-300,000	'	'
12 Months or Longer, Fair Value	2,200,000	'	'
12 Months or Longer, Unrealized Losses	-100,000	'	'
Total, Fair Value	38,400,000	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-400,000	'	'
Mortgage and Asset-backed [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	4,000,000	'	4,800,000
Available-for-sale Debt Securities Gross Unrealized Gain	1,600,000	'	1,300,000
Available-for-sale Debt Securities, Gross Unrealized Loss	0	'	-100,000
Available-for-sale Debt Securities, Fair Value	5,600,000	'	6,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	0	'	13,900,000
Less Than 12 Months, Unrealized Losses	0	'	-100,000
12 Months or Longer, Fair Value	700,000	'	1,100,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Fair Value	700,000	'	15,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	0	'	-100,000
Equity Securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	547,300,000	'	530,000,000
Available-for-sale Equity Securities, Gross Unrealized Gain	119,900,000	'	74,700,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-5,800,000	'	-6,200,000
Available for sale Securities, Equity Securities, Fair Value	661,400,000	'	598,500,000
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]	'	'	'
Other Receivables	53,400,000	'	0
Other Liabilities	51,300,000	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	174,500,000	'	166,700,000
Less Than 12 Months, Unrealized Losses	-4,100,000	'	-5,500,000
12 Months or Longer, Fair Value	30,000,000	'	8,900,000
12 Months or Longer, Unrealized Losses	-1,700,000	'	-700,000
Total, Fair Value	204,500,000	'	175,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-5,800,000	'	-6,200,000
Exchange Traded Funds [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	125,200,000	'	122,000,000
Available-for-sale Equity Securities, Gross Unrealized Gain	5,200,000	'	3,900,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-600,000	'	-1,000,000
Available for sale Securities, Equity Securities, Fair Value	129,800,000	'	124,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	51,200,000	'	67,600,000
Less Than 12 Months, Unrealized Losses	-200,000	'	-1,000,000
12 Months or Longer, Fair Value	14,500,000	'	0
12 Months or Longer, Unrealized Losses	-400,000	'	0
Total, Fair Value	65,700,000	'	67,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-600,000	'	-1,000,000
Limited Liability Companies and Limited Partnerships [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	164,300,000	'	150,300,000
Available-for-sale Equity Securities, Gross Unrealized Gain	55,700,000	'	25,200,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-2,300,000	'	-1,600,000
Available for sale Securities, Equity Securities, Fair Value	217,700,000	'	173,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	74,800,000	'	53,100,000
Less Than 12 Months, Unrealized Losses	-2,000,000	'	-900,000
12 Months or Longer, Fair Value	2,400,000	'	5,000,000
12 Months or Longer, Unrealized Losses	-300,000	'	-700,000
Total, Fair Value	77,200,000	'	58,100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-2,300,000	'	-1,600,000
External Credit Rating, Investment Grade [Member] | Fixed Maturities [Member]	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-24,700,000	'	-74,200,000
External Credit Rating, Non Investment Grade [Member] | Fixed Maturities [Member]	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-3,800,000	'	-5,500,000
Percentage of Unrealized Loss Postion to Amortized Cost Basis of Available for Sale Security Average	4.00%	'	5.00%
Finance, Insurance and Real Estate [Member] | Preferred Stock [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	85,500,000	'	85,400,000
Available-for-sale Equity Securities, Gross Unrealized Gain	4,900,000	'	2,900,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-1,000,000	'	-2,500,000
Available for sale Securities, Equity Securities, Fair Value	89,400,000	'	85,800,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	5,000,000	'	22,500,000
Less Than 12 Months, Unrealized Losses	0	'	-2,500,000
12 Months or Longer, Fair Value	12,100,000	'	2,500,000
12 Months or Longer, Unrealized Losses	-1,000,000	'	0
Total, Fair Value	17,100,000	'	25,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-1,000,000	'	-2,500,000
All Industries Other than Finance, Insurance and Real Estate [Member] | Preferred Stock [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	20,200,000	'	20,100,000
Available-for-sale Equity Securities, Gross Unrealized Gain	5,600,000	'	4,400,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-100,000	'	-100,000
Available for sale Securities, Equity Securities, Fair Value	25,700,000	'	24,400,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	700,000	'	4,300,000
Less Than 12 Months, Unrealized Losses	-100,000	'	-100,000
12 Months or Longer, Fair Value	700,000	'	700,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Fair Value	1,400,000	'	5,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-100,000	'	-100,000
2000 to 3999 Manufacturing [Member] | Common Stocks [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	84,800,000	'	83,400,000
Available-for-sale Equity Securities, Gross Unrealized Gain	25,900,000	'	21,300,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-1,100,000	'	-100,000
Available for sale Securities, Equity Securities, Fair Value	109,600,000	'	104,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	30,800,000	'	5,000,000
Less Than 12 Months, Unrealized Losses	-1,100,000	'	-100,000
12 Months or Longer, Fair Value	300,000	'	200,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Fair Value	31,100,000	'	5,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-1,100,000	'	-100,000
All Industries Other than Manufacturing [Member] | Common Stocks [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available for sale Securities, Equity Securities, Cost	67,300,000	'	68,800,000
Available-for-sale Equity Securities, Gross Unrealized Gain	22,600,000	'	17,000,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-700,000	'	-900,000
Available for sale Securities, Equity Securities, Fair Value	89,200,000	'	84,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'
Less Than 12 Months, Fair Value	12,000,000	'	14,200,000
Less Than 12 Months, Unrealized Losses	-700,000	'	-900,000
12 Months or Longer, Fair Value	0	'	500,000
12 Months or Longer, Unrealized Losses	0	'	0
Total, Fair Value	12,000,000	'	14,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	($700,000)	'	($900,000)

Investments_Schedule_of_Other_

Investments - Schedule of Other Than Temporary Impairment (Details) (Fixed Maturities [Member], USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fixed Maturities [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	'	'	'	'
Balance at Beginning of Period	$12.90	$4.40	$9.90	$4.60
Additions for Previously Unrecognized OTTI Credit Losses	0	0.8	2.4	1.8
Increases to Previously Recognized OTTI Credit Losses	0	1.3	0.6	1.3
From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell	-2.4	-2.1	-2.4	-3.2
Reductions for Investments Sold During Period	0	0	0	-0.1
Balance at End of Period	$10.50	$4.40	$10.50	$4.40

Investments_Investments_Net_Re

Investments Investments - Net Realized Gains on Sales of Investments (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fixed Maturities [Member]	'	'	'	'
Net Investment Income [Line Items]	'	'	'	'
Gains on Sales	$0.20	$2.50	$5	$29.60
Equity Securities [Member]	'	'	'	'
Net Investment Income [Line Items]	'	'	'	'
Gains on Sales	7.9	0.7	11.7	1.9
Losses on Sales	$0	($0.20)	$0	($0.30)

Investments_Investments_Schedu

Investments Investments - Schedule of Other Investments (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Investments Disclosures [Abstract]	'	'
Loans to Policyholders at Unpaid Principal	$280.80	$275.40
Real Estate at Depreciated Cost	164.3	167.1
Trading Securities, Fair Value Disclosure	5	5
Other	0.4	0.5
Total	$450.50	$448

Property_and_Casualty_Insuranc2

Property and Casualty Insurance Reserves (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Property and Casulty Insurance Reserve - Gross of Reinsurance at Beginning of Year	$843.50	$970.60
Less Reinsurance Recoverables at Beginning of Year	63.4	66.2
Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	780.1	904.4
Incurred Losses and LAE Related to Prior Years	-44.9	-47.7
Total Incurred Losses and LAE	712	763.4
Paid Losses and LAE Related to Prior Years	309.1	364.2
Total Paid Losses and LAE	769.4	850
Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	722.7	817.8
Plus Reinsurance Recoverables at End of Period	58.2	66.8
Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	780.9	884.6
Continuing Operations [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Current Year	756.9	811.1
Incurred Losses and LAE Related to Prior Years	-44.7	-43.2
Paid Losses and LAE Related to Current Year	460.3	485.8
Paid Losses and LAE Related to Prior Years	302.6	354.4
Discontinued Operations [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	-0.2	-4.5
Paid Losses and LAE Related to Prior Years	6.5	9.8
Property and Casualty, Personal Insurance Product Line [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	-44	-41.2
Property and Casualty, Commercial Insurance Product Line [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	-0.9	-6.5
Property and Casualty, Commercial Insurance Product Line [Member] | Continuing Operations [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	'	-2
Property and Casualty, Commercial Insurance Product Line [Member] | Discontinued Operations [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	'	-4.5
Personal Automobile [Member] | Property and Casualty, Personal Insurance Product Line [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	-26.9	-22.6
Homeowners [Member] | Property and Casualty, Personal Insurance Product Line [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	-13.3	-13.3
Other Personal Lines [Member] | Property and Casualty, Personal Insurance Product Line [Member]	'	'
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]	'	'
Incurred Losses and LAE Related to Prior Years	($3.80)	($5.30)

Debt_Details

Debt (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Feb. 27, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Debt Instrument [Line Items]	'	'	'	'	'	'
Notes Payable	'	$751,900,000	'	$751,900,000	'	$606,900,000
Interest Expense before Capitalization of Interest	'	12,400,000	9,700,000	35,400,000	29,300,000	'
Capitalization of Interest	'	-300,000	-200,000	-800,000	-700,000	'
Interest Expense	'	12,100,000	9,500,000	34,600,000	28,600,000	'
Interest Paid	'	2,900,000	500,000	24,300,000	19,200,000	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	'	0	'	0	'	0
Senior Notes [Member] | Senior Notes, 6 Percent Due May 15, 2017 [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Notes Payable	'	358,300,000	'	358,300,000	'	357,900,000
Notes Payable, Interest Rate, Stated Percentage	'	6.00%	'	6.00%	'	'
Interest Expense before Capitalization of Interest	'	5,500,000	5,500,000	16,600,000	16,600,000	'
Interest Paid	'	0	0	10,800,000	10,800,000	'
Senior Notes [Member] | Senior Notes, 6 Percent Due November 30, 2015 [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Notes Payable	'	249,400,000	'	249,400,000	'	249,000,000
Notes Payable, Interest Rate, Stated Percentage	'	6.00%	'	6.00%	'	'
Interest Expense before Capitalization of Interest	'	3,900,000	3,900,000	11,600,000	11,600,000	'
Interest Paid	'	0	0	7,500,000	7,500,000	'
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Notes Payable	'	144,200,000	'	144,200,000	'	0
Notes Payable, Interest Rate, Stated Percentage	'	7.38%	'	7.38%	'	'
Interest Expense before Capitalization of Interest	'	2,800,000	0	6,600,000	0	'
Interest Paid	'	2,700,000	0	5,500,000	0	'
Debt Instrument, Face Amount	150,000,000	'	'	'	'	'
Proceeds from Debt, Net of Issuance Costs	144,200,000	'	'	'	'	'
Debt Instrument, Interest Rate, Effective Percentage	7.69%	'	'	'	'	'
Notes Payable under Revolving Credit Agreement [Member] | 2016 Credit Agreement [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Line of Credit Facility, Amount Outstanding	'	0	'	0	'	0
Mortgage Note Payabe at Amortized Cost [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Interest Expense before Capitalization of Interest	'	0	0	0	200,000	'
Interest Paid	'	0	100,000	0	300,000	'
Revolving Credit Facility [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Interest Expense before Capitalization of Interest	'	200,000	300,000	600,000	900,000	'
Interest Paid	'	200,000	400,000	500,000	600,000	'
Revolving Credit Facility [Member] | 2016 Credit Agreement [Member]	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Line of Credit Facility, Length of Agreement	'	'	'	'4 years	'	'
Line of Credit Facility, Maximum Borrowing Capacity	'	$225,000,000	'	$225,000,000	'	'

Longterm_Equitybased_Compensat2

Long-term Equity-based Compensation Plans Omnibus Plan (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of Shares Available for Grant under Omnibus Plan	8,187,286	'
Equity-based Compensation Expense	$5.80	$4.40
Unamortized Compensation Expense Related to Nonvested Awards	$5.60	'
Unamortized Compensation Expense Related to Nonvested Awards, Period for Recognition	'1 year 10 months 28 days	'
Performance Based Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Reduction in Share Authorization if Maximum Performance Level is Met or Exceeded	538,050	'

Longterm_Equitybased_Compensat3

Long-term Equity-based Compensation Plans Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) (Stock Options [Member])	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Expected Volatility Rate, Minimum	25.76%	39.10%
Fair Value Assumptions, Expected Volatility Rate, Maximum	44.43%	48.23%
Fair Value Assumptions, Risk Free Interest Rate, Minimum	1.07%	0.62%
Fair Value Assumptions, Risk Free Interest Rate, Maximum	2.14%	1.38%
Minimum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Expected Dividend Yield	2.53%	2.83%
Maximum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Expected Dividend Yield	2.60%	3.00%
Employee [Member] | Minimum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Weighted-average Expected Life	'4 years	'4 years
Employee [Member] | Maximum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Weighted-average Expected Life	'7 years	'7 years
Director [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Fair Value Assumptions, Weighted-average Expected Life	'6 years	'6 years

Longterm_Equitybased_Compensat4

Long-term Equity-based Compensation Plans Disclosure of Share-based Compensation Arrangements by Share-based Payment Awards (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Options and Stock Appreciation Rights, Outstanding at Beginning of the Year, Number	2,543,673	'
Options and Stock Appreciation Rights, Outstanding at Beginning of the Year, Weighted Average Exercise Price	$41.37	'
Options and Stock Appreciation Rights, Grants in Period, Gross	289,000	'
Options and Stock Appreciation Rights, Grants in Period, Weighted Average Exercise Price	$36.59	'
Options and Stock Appreciation Rights, Exercises in Period	-26,375	'
Options and Stock Appreciation Rights, Exercises in Period, Weighted Average Exercise Price	$28.76	'
Options and Stock Appreciation Rights, Forfeitures and Expirations in Period	-492,248	'
Options and Stock Appreciation Rights, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$47.56	'
Options and Stock Appreciation Rights, Outstanding at End of the Year, Number	2,314,050	'
Options and Stock Appreciation Rights, Outstanding at End of the Year, Weighted Average Exercise Price	$39.61	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 2 months 12 days	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Aggregate Intrinsic Value	$3.10	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Number	2,289,388	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Weighted Average Exercise Price	$39.67	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 1 month 28 days	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Aggregate Intrinsic Value	3.1	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Number	1,970,046	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Weighted Average Exercise Price	$40.49	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Weighted Average Remaining Contractual Term	'3 years 4 months 28 days	'
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Aggregate Intrinsic Value	2.8	'
Options, Grants in Period, Weighted Average Grant Date Fair Value	$10.49	$10.20
Options, Exercises in Period, Total Intrinsic Value	0.3	1.8
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	0.1	0.6
Proceeds from Stock Options Exercised	$0	$0.60

Longterm_Equitybased_Compensat5

Long-term Equity-based Compensation Plans Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	2,314,050	2,543,673
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$39.61	$41.37
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 2 months 12 days	'
Range of Exercise Prices $10.00 - $15.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$10	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$15	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	16,750	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$13.55	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'2 years 8 months 12 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	16,750	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$13.55	'
Range of Exercise Prices $15.01 - $20.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$15.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$20	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	8,000	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$16.48	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 7 months 6 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	8,000	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$16.48	'
Range of Exercise Prices $20.01 - $25.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$20.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$25	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	30,750	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$23.38	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 2 months 5 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	30,750	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$23.38	'
Range of Exercise Prices $25.01 - $30.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$25.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$30	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	389,000	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$28.85	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'6 years 8 months 16 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	339,248	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$28.74	'
Range of Exercise Prices $30.01 - $35.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$30.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$35	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	243,750	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$33.18	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'8 years 3 months 15 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	140,500	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$32.98	'
Range of Exercise Prices $35.01 - $40.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$35.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$40	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	586,625	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$36.90	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'6 years 3 months 4 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	395,623	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$37.11	'
Range of Exercise Prices $40.01 - $45.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$40.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$45	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	185,902	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$43.10	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'0 years 4 months 2 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	185,902	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$43.10	'
Range of Exercise Prices $45.01 - $50.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$45.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$50	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	796,505	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$48.59	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'1 year 4 months 28 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	796,505	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$48.59	'
Range of Exercise Prices $50.01 - $55.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$50.01	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$55	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	56,768	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$51.16	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'0 years 4 months 6 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	56,768	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$51.16	'
Range of Exercise Prices $10.00 - $50.00 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$10	'
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$55	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	2,314,050	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$39.61	'
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	'4 years 2 months 12 days	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	1,970,046	'
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$40.49	'

Longterm_Equitybased_Compensat6

Long-term Equity-based Compensation Plans Schedule of Nonvested Restricted Stock Units Activity (Details) (USD $)

9 Months Ended

0 Months Ended

36 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Feb. 01, 2014

Dec. 31, 2013

Time Vested Restricted Stock [Member]

Performance Based Restricted Stock [Member]

Performance Based Restricted Stock Units [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Time Vested Restricted Stock Units [Member]

Performance Period, 2014 to 2016 [Member]

Performance Period, 2013 to 2015 [Member]

Performance Period, 2012 to 2014 [Member]

Performance Period, 2011 to 2013 [Member]

Performance Period, 2011 to 2013 [Member]

Performance Based Restricted Stock [Member]

Performance Based Restricted Stock [Member]

Performance Based Restricted Stock [Member]

Performance Based Restricted Stock [Member]

Performance Based Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Stock Options Exercised

$0

$0.60

'

'

'

'

'

'

'

'

'

'

'

Restricted Stock, Nonvested at Beginning of Year, Number

'

'

101,627

176,800

0

'

'

0

'

'

'

'

'

Restricted Stock, Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value

'

'

$31.48

$39.54

$0

'

'

$0

'

'

'

'

'

Restricted Stock, Grants in Period

'

'

2,000

0

66,575

'

'

41,925

'

'

'

'

'

Restricted Stock, Weighted Average Grant Date Fair Value

'

'

$38.59

$0

$40.50

'

'

$36.56

'

'

'

'

'

Restricted Stock, Vested in Period

'

'

-25,568

-54,934

0

'

'

-9,351

'

'

'

'

'

Restricted Stock, Vested in Period, Weighted Average Grant Date Fair Value

'

'

$30.56

$39.83

$0

'

'

$36.47

'

'

'

'

'

Restricted Stock, Forfeited in Period

'

'

-21,789

-7,691

-1,400

'

'

-1,500

'

'

'

'

'

Restricted Stock, Forfeitures, Weighted Average Grant Date Fair Value

'

'

$31

$40.12

$40.50

'

'

$36.47

'

'

'

'

'

Restricted Stock, Nonvested at End of Period, Number

'

'

56,270

114,175

65,175

'

'

31,074

'

'

'

'

'

Restricted Stock, Nonvested at End of Period, Weighted Average Grant Date Fair Value

'

'

$32.33

$39.37

$40.50

'

'

$36.60

'

'

'

'

'

Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded

'

'

'

'

'

'

'

'

65,175

56,400

57,775

'

'

Payout Percentage for Exceeding Performance Target

'

'

'

'

'

'

'

'

'

'

'

'

118.00%

Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures

'

'

'

'

'

'

'

'

'

'

'

9,014

'

Restricted Stock, Vested in Period, Total Fair Value

'

'

'

'

'

3.6

4

'

'

'

'

'

'

Restricted Stock, Vested in Period, Tax Benefits

'

'

'

'

'

$1.20

$1.40

'

'

'

'

'

'

Performance Period

'

'

'

'3 years

'

'

'

'

'

'

'

'

'

Longterm_Equitybased_Compensat7

Long-term Equity-based Compensation Plans Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan, Activity (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan [Abstract]	'
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Number, Beginning of Year	4,000
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Weighted Average Exercise Price, Beginning of Year	$31.50
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Granted and Vested in Period	4,000
Share-based Compensation Arrangements by Share-based Payment Award, Deferred Stock Units, Granted and Vested in Period, Weighted Average Exercise Price	$37.53
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Number, End of Period	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Weighted Average Exercise Price, End of Period	$34.52

Income_from_Continuing_Operati2

Income from Continuing Operations Per Unrestricted Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Basic and Diluted Earnings Per Share [Line Items]	'	'	'	'
Income from Continuing Operations	$4.80	$68.60	$49.30	$159.70
Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	0	0	0	0
Diluted Income from Continuning Operations Attributed to Unrestricted Shares	4.8	68.3	49.1	158.9
Weighted-Average Unrestricted Shares Outstanding	52,605,300	56,365,800	54,245,700	57,374,400
Equity-based Compensation Equivalent Shares	94,600	135,700	110,500	118,800
Weighted-Average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	52,699,900	56,501,500	54,356,200	57,493,200
Basic Income from Continuing Operations Per Unrestricted Share (in dollars per share)	$0.09	$1.21	$0.90	$2.77
Diluted Income from Continuing Operations Per Untrestriced Share (in dollars per share)	$0.09	$1.21	$0.90	$2.76
Unrestricted Shares [Member]	'	'	'	'
Schedule of Basic and Diluted Earnings Per Share [Line Items]	'	'	'	'
Income from Continuing Operations	4.8	68.3	49.1	158.9
Participating Awards [Member]	'	'	'	'
Schedule of Basic and Diluted Earnings Per Share [Line Items]	'	'	'	'
Income from Continuing Operations	$0	$0.30	$0.20	$0.80

Income_from_Continuing_Operati3

Income from Continuing Operations Per Unrestricted Share - Antidilutive Securities (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,830,500	2,125,800	1,540,600	2,194,000
Stock Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,830,500	2,125,800	1,540,600	2,194,000

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	'	'	'	'
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$7.20	($33.80)	$228.50	($291.50)
Reclassification Adjustment for Amounts Included in Net Income	-4.3	0.4	-8	-24.9
Unrealized Holding Gains (Losses)	2.9	-33.4	220.5	-316.4
Foreign Currency Translation Adjustments	-0.5	0.2	-0.7	0.1
Amortization of Unrecognized Postretirement Benefit Costs	-2	-6.3	-5.9	-18.4
Other Comprehensive Income (Loss) Before Income Taxes	4.4	-26.9	225.7	-297.9
Other Comprehensive Income Tax Benefit (Expense):	'	'	'	'
Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	-2.6	11.9	-80.6	104.1
Reclassification Adjustment for Amounts Included in Net Income	1.5	-0.1	2.8	8.7
Unrealized Holding Gains and Losses	-1.1	11.8	-77.8	112.8
Foreign Currency Translation Adjustment	0.2	0	0.3	0
Amortization of Unrecognized Postretirement Benefit Costs	-0.7	-2.3	-2.1	-6.5
Other Comprehensive Income Tax Benefit (Expense)	$1.60	($9.50)	$79.60	($106.30)

Other_Comprehensive_Income_Los3

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Statement of Comprehensive Income [Abstract]	'	'
Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$1	$0.30
Other Net Unrealized Gains on Investments	317.5	175.5
Foreign Currency Translation Adjustments, Net of Income Taxes	0.4	0.8
Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	-37.5	-41.3
Accumulated Other Comprehensive Income	$281.40	$135.30

Other_Comprehensive_Income_Los4

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Net Realized Gains on Sales of Investments	$8	$49.10	$18.10	$78.30
Net Impairment Losses Recognized in Earnings	-3.8	-3.4	-8.7	-6.3
Total Before Income Taxes	4	102	67.1	233
Interest and Other Expenses	-22.1	-25.3	-67.3	-74.3
Income Tax Benefit (Expense)	0.8	-33.4	-17.8	-73.3
Total Reclassification from AOCI to Net Income	4.7	70.1	49.1	162.5
Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Total Reclassification from AOCI to Net Income	1.5	-4.3	1.4	4.3
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Net Realized Gains on Sales of Investments	8.1	3	16.7	31.2
Net Impairment Losses Recognized in Earnings	-3.8	-3.4	-8.7	-6.3
Total Before Income Taxes	4.3	-0.4	8	24.9
Income Tax Benefit (Expense)	-1.5	0.1	-2.8	-8.7
Total Reclassification from AOCI to Net Income	2.8	-0.3	5.2	16.2
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Interest and Other Expenses	-2	-6.3	-5.9	-18.4
Income Tax Benefit (Expense)	0.7	2.3	2.1	6.5
Total Reclassification from AOCI to Net Income	($1.30)	($4)	($3.80)	($11.90)

Income_Taxes_Schedule_of_Curre

Income Taxes Schedule of Current and Deferred Income Tax Assets (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Asset Disclosure [Abstract]	'	'
Current Income Tax Assets	$4.30	$0
Deferred Income Tax Assets	0	31.8
Current and Deferred Income Tax Assets	$4.30	$31.80

Income_Taxes_Schedule_of_Curre1

Income Taxes - Schedule of Current and Deferred Income Tax Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Current Income Tax Liabilities	$0	$1.50
Deferred Income Tax Liabilities	41.7	0
Unrecognized Tax Benefits	7	6.8
Liabilities for Income Taxes	$48.70	$8.30

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Income Taxes Paid	$30.10	$39.60

Pension_Benefits_and_Postretir2

Pension Benefits and Postretirement Benefits Other Than Pensions (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service Cost	$2.10	$2.70	$6.50	$8.10
Interest Cost on Projected Benefit Obligation	6.2	5.6	18.6	16.8
Expected Return on Plan Assets	-8.7	-7.4	-26.2	-22.3
Amortization of Accumulated Unrecognized Actuarial Loss	2.5	6.6	7.3	19.7
Total Expense Recognized	2.1	7.5	6.2	22.3
Postretirement Benefits Other than Pensions [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service Cost	0	0	0.1	0.1
Interest Cost on Projected Benefit Obligation	0.3	0.3	0.9	0.9
Amortization of Accumulated Unrecognized Actuarial Loss	-0.5	-0.3	-1.4	-0.9
Total Expense Recognized	($0.20)	$0	($0.40)	$0.10

Business_Segments_Earned_Premi

Business Segments - Earned Premiums by Product Line (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Entity-Wide Information, Revenue from External Customer [Line Items]	'	'	'	'
Earned Premiums, Life	$96.80	$98.40	$291.60	$294.90
Earned Premiums, Accident and Health	37.1	40.7	112.1	121.2
Earned Premiums, Total	462.8	507.5	1,410.70	1,530.20
Personal Automobile [Member]	'	'	'	'
Entity-Wide Information, Revenue from External Customer [Line Items]	'	'	'	'
Earned Premiums, Property and Casualty	205.1	239.1	633.4	729.4
Homeowners [Member]	'	'	'	'
Entity-Wide Information, Revenue from External Customer [Line Items]	'	'	'	'
Earned Premiums, Property and Casualty	77.9	82.3	236.6	244.8
Other Personal Property and Casualty Insurance [Member]	'	'	'	'
Entity-Wide Information, Revenue from External Customer [Line Items]	'	'	'	'
Earned Premiums, Property and Casualty	31.8	33.5	96.2	101.2
Commercial Automobile [Member]	'	'	'	'
Entity-Wide Information, Revenue from External Customer [Line Items]	'	'	'	'
Earned Premiums, Property and Casualty	$14.10	$13.50	$40.80	$38.70

Business_Segments_Segment_Info

Business Segments - Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
			segments
Segment Reporting Information [Line Items]	'	'	'	'
Number of Operating Segments	'	'	2	'
Earned Premiums	$462.80	$507.50	$1,410.70	$1,530.20
Net Investment Income	72.3	82.4	216	237.8
Other Income	0.5	0.1	0.8	0.5
Total Revenues	539.8	635.7	1,636.90	1,840.50
Net Realized Gains on Sales of Investments	8	49.1	18.1	78.3
Segment Operating Profit (Loss)	-0.2	56.3	57.7	161
Net Impairment Losses Recognized in Earnings	-3.8	-3.4	-8.7	-6.3
Income from Continuing Operations before Income Taxes	4	102	67.1	233
Segment Net Operating Income (Loss)	2.1	38.9	43.2	112.9
Income from Continuing Operations	4.8	68.6	49.3	159.7
Corporate, Non-Segment [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Segment Operating Profit (Loss)	-7.7	-11.1	-24.1	-35.3
Segment Net Operating Income (Loss)	-4.6	-7.4	-14.7	-23
Segment Reconciling Items [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Other Income	4.6	4.6	13	10.6
Net Realized Gains on Sales of Investments	8	49.1	18.1	78.3
Net Impairment Losses Recognized in Earnings	-3.8	-3.4	-8.7	-6.3
Net Realized Gains (Losses) on Sales of Investments, Net of Tax	5.2	31.9	11.8	50.9
Net Impairment Losses Recognized in Earnings, Net of Tax	-2.5	-2.2	-5.7	-4.1
Operating Segments [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total Revenues	531	585.4	1,614.50	1,757.90
Segment Operating Profit (Loss)	7.5	67.4	81.8	196.3
Segment Net Operating Income (Loss)	6.7	46.3	57.9	135.9
Operating Segments [Member] | Property and Casualty Insurance [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Earned Premiums	309.7	348.7	949.5	1,054.70
Net Investment Income	18.5	21.3	55.6	67.9
Other Income	0.1	0.1	0.4	0.4
Total Revenues	328.3	370.1	1,005.50	1,123
Segment Operating Profit (Loss)	-23.9	32.2	-8.9	98
Segment Net Operating Income (Loss)	-13.6	23.4	-0.4	71.5
Operating Segments [Member] | Life and Health Insurance [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Earned Premiums	153.1	158.8	461.2	475.5
Net Investment Income	49.2	56.5	147.4	159.3
Other Income	0.4	0	0.4	0.1
Total Revenues	202.7	215.3	609	634.9
Segment Operating Profit (Loss)	31.4	35.2	90.7	98.3
Segment Net Operating Income (Loss)	$20.30	$22.90	$58.30	$64.40

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Inputs (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Option Investments, Fair Value Disclosure	$50.60	$0
Trading Securities, Fair Value Disclosure	5	5
Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Option Investments, Fair Value Disclosure	50.6	'
Trading Securities, Fair Value Disclosure	5	5
Investments, Fair Value Disclosure	5,414.20	5,178.50
Fair Value, Measurements, Recurring [Member] | Fixed Maturities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	4,697.20	4,575
Fair Value, Measurements, Recurring [Member] | US Government and Government Agencies and Authorities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	343.5	362.2
Fair Value, Measurements, Recurring [Member] | States and Political Subdivisions [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	1,439.20	1,361
Fair Value, Measurements, Recurring [Member] | Bonds and Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	2,839	2,793.70
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	7.4	7.4
Fair Value, Measurements, Recurring [Member] | Collateralized Loan Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	62.5	44.7
Fair Value, Measurements, Recurring [Member] | Mortgage and Asset-backed [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	5.6	6
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	661.4	598.5
Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	129.8	124.9
Fair Value, Measurements, Recurring [Member] | Partnership Interest [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	217.7	173.9
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Option Investments, Fair Value Disclosure	0	'
Trading Securities, Fair Value Disclosure	5	5
Investments, Fair Value Disclosure	432.7	417.9
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Fixed Maturities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	124.4	121.2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government and Government Agencies and Authorities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	124.4	121.2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | States and Political Subdivisions [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Bonds and Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Redeemable Preferred Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized Loan Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage and Asset-backed [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	303.3	291.7
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Exchange Traded Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	129.8	124.9
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Partnership Interest [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Option Investments, Fair Value Disclosure	0	'
Trading Securities, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	4,263.10	4,133.90
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Fixed Maturities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	4,157.90	4,033.10
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government and Government Agencies and Authorities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	219.1	241
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | States and Political Subdivisions [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	1,439.20	1,361
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Bonds and Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	2,498	2,429.60
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Redeemable Preferred Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Loan Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage and Asset-backed [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	1.6	1.5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	105.2	100.8
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Exchange Traded Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Partnership Interest [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Option Investments, Fair Value Disclosure	50.6	'
Trading Securities, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	718.4	626.7
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	414.9	420.7
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government and Government Agencies and Authorities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | States and Political Subdivisions [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Bonds and Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	341	364.1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Redeemable Preferred Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	7.4	7.4
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized Loan Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	62.5	44.7
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage and Asset-backed [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	4	4.5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	252.9	206
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Exchange Traded Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Partnership Interest [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	217.7	173.9
Partnership Interest [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	108.9	'
Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	89.4	85.8
Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	84.4	80.8
Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	5	5
All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	25.7	24.4
All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	11	10.5
All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Preferred Stock [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	14.7	13.9
2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	109.6	104.6
2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	101	95.1
2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	7.5	7.3
2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	1.1	2.2
All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	89.2	84.9
All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	72.5	71.7
All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	2.3	2.2
All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Common Stocks [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	$14.40	$11

Fair_Value_Measurements_Quanti

Fair Value Measurements - Quantitative Information for Level Three Inputs (Details) (Market Yield [Member], Fair Value, Inputs, Level 3 [Member], USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Collateralized Loan Obligations [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	62.5	44.7
Collateralized Loan Obligations [Member] | Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	2.00%	3.20%
Collateralized Loan Obligations [Member] | Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	7.50%	6.80%
Collateralized Loan Obligations [Member] | Weighted Average [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	4.70%	4.30%
Other Debt Obligations [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	21.5	20.1
Debt Securities [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	414.9	420.7
External Credit Rating, Investment Grade [Member] | Private Placement [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	113.7	108.5
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	0.70%	1.00%
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	5.90%	6.00%
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Weighted Average [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	3.90%	4.30%
External Credit Rating, Non Investment Grade [Member] | Senior Debt [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	87.3	93.9
External Credit Rating, Non Investment Grade [Member] | Senior Debt [Member] | Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	3.40%	4.20%
External Credit Rating, Non Investment Grade [Member] | Senior Debt [Member] | Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	15.50%	15.60%
External Credit Rating, Non Investment Grade [Member] | Senior Debt [Member] | Weighted Average [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	9.80%	8.60%
External Credit Rating, Non Investment Grade [Member] | Junior Debt [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Assets, Fair Value Disclosure	129.9	153.5
External Credit Rating, Non Investment Grade [Member] | Junior Debt [Member] | Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	5.40%	8.80%
External Credit Rating, Non Investment Grade [Member] | Junior Debt [Member] | Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	25.90%	26.60%
External Credit Rating, Non Investment Grade [Member] | Junior Debt [Member] | Weighted Average [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Discount Rate	13.30%	14.20%

Fair_Value_Measurements_Level_

Fair Value Measurements - Level 3 Inputs Reconciliation (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	$716.30	$556.20	$626.70	$520.40
Included in Condensed Consolidated Statements of Operations	-0.4	-2.4	-0.2	-3.9
Included in Other Comprehensive Income	19.1	1.1	36.9	-5.3
Purchases	67.4	50.1	227.1	178.9
Settlements	-50.8	-30.4	-119	-114.6
Sales	-33.2	-0.9	-52.5	-1.2
Transfers into Level 3	0	3	0	8.2
Transfers out of Level 3	0	0	-0.6	-5.8
Balance at End of Period	718.4	576.7	718.4	576.7
Fair Value, Level 1 to level 2 Transfers, Amount	0	0	0	0
Fair Value, Level 2 to Level 1 Transfers, Amount	0	0	0	0
Fair Value, Level 1 to level 3 Transfers, Amount	0	0	0	0
Fair Value, Level 3 to level 1 Transfers, Amount	0	0	0	0
Corporate Bonds and Notes [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	384.8	351.5	364.1	361
Included in Condensed Consolidated Statements of Operations	-1.8	-1.8	-4.1	-2.7
Included in Other Comprehensive Income	-1.4	0.9	4	-7.2
Purchases	31.7	17.3	117.6	92.9
Settlements	-41.6	-21	-92.4	-94.1
Sales	-30.7	-0.5	-47.6	-0.5
Transfers into Level 3	'	3	'	5.8
Transfers out of Level 3	'	'	-0.6	-5.8
Balance at End of Period	341	349.4	341	349.4
Redeemable Preferred Stocks [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	7.1	4.3	7.4	4.7
Included in Condensed Consolidated Statements of Operations	0	0	0	-0.4
Included in Other Comprehensive Income	0.5	-0.1	0.4	-0.1
Purchases	0	5.1	0	5.1
Settlements	-0.2	-0.1	-0.4	-0.1
Sales	0	0	0	0
Transfers into Level 3	'	0	'	0
Transfers out of Level 3	'	'	0	0
Balance at End of Period	7.4	9.2	7.4	9.2
Collateralized Loan Obligations [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	49.5	29.8	44.7	0
Included in Condensed Consolidated Statements of Operations	0	0	0.1	0.1
Included in Other Comprehensive Income	-0.3	0.4	-0.4	0
Purchases	13.3	11.1	18.1	41.2
Settlements	0	0	0	0
Sales	0	0	0	0
Transfers into Level 3	'	0	'	0
Transfers out of Level 3	'	'	0	0
Balance at End of Period	62.5	41.3	62.5	41.3
Mortgage and Asset-backed [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	3.9	6.7	4.5	0.1
Included in Condensed Consolidated Statements of Operations	0	0	0.1	0
Included in Other Comprehensive Income	0.1	-0.1	0.2	-0.3
Purchases	0	0.1	0	4.6
Settlements	0	0	-0.8	-0.1
Sales	0	0	0	0
Transfers into Level 3	'	0	'	2.4
Transfers out of Level 3	'	'	0	0
Balance at End of Period	4	6.7	4	6.7
Preferred and Common Stocks [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	36.3	16.6	32.1	13.3
Included in Condensed Consolidated Statements of Operations	0.8	-0.9	3.1	-1
Included in Other Comprehensive Income	1	0.8	3	3.9
Purchases	0.1	0	2.8	0.6
Settlements	-0.8	0	-3.6	0
Sales	-2.2	-0.4	-2.2	-0.7
Transfers into Level 3	'	0	'	0
Transfers out of Level 3	'	'	0	0
Balance at End of Period	35.2	16.1	35.2	16.1
Other Equity Interests [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	194.4	147.3	173.9	141.3
Included in Condensed Consolidated Statements of Operations	0.3	0.3	0	0.1
Included in Other Comprehensive Income	19.2	-0.8	29.7	-1.6
Purchases	12.3	16.5	38.6	34.5
Settlements	-8.2	-9.3	-21.8	-20.3
Sales	-0.3	0	-2.7	0
Transfers into Level 3	'	0	'	0
Transfers out of Level 3	'	'	0	0
Balance at End of Period	217.7	154	217.7	154
Fair Value Option Investments [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Balance at Beginning of Period	40.3	'	0	'
Included in Condensed Consolidated Statements of Operations	0.3	'	0.6	'
Included in Other Comprehensive Income	0	'	0	'
Purchases	10	'	50	'
Settlements	0	'	0	'
Sales	0	'	0	'
Transfers out of Level 3	'	'	0	'
Balance at End of Period	$50.60	'	$50.60	'

Related_Parties_Details

Related Parties (Details) (Director [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Related Party Transaction [Line Items]	'	'
Amounts invested in Defined Contribution Plan Mutual Fund Managed by a Directors Investment Advisory Firm	$22.60	'
Amounts invested in Defined Contribution Plan Mutual Fund Managed by a Directors Investment Advisory Firm Percentage of Total Defined Contribution Plan Investments	6.40%	'
Trinity [Member]	'	'
Related Party Transaction [Line Items]	'	'
Amount of assets being managed by FS&C	165.8	'
Investment expenses	0.3	0.3
Pension Plan, Defined Benefit [Member]	'	'
Related Party Transaction [Line Items]	'	'
Investment expenses	0.3	0.2
Pension Plan, Defined Benefit [Member]	'	'
Related Party Transaction [Line Items]	'	'
Amount of assets being managed by FS&C	$157.80	'