Kemper (KMPR) 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	KEMPER Corporation
Trading Symbol	KMPR
Entity Central Index Key	860748
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding at April 30, 2015		51,826,732

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Earned Premiums	$431.30	$477.60
Net Investment Income	70.6	71.1
Other Income	0.9	0.1
Net Realized Gains on Sales of Investments	3.4	6.6
Other-than-temporary Impairment Losses:
Total Other-than-temporary Impairment Losses	-7	-0.8
Portion of Losses Recognized in Other Comprehensive Income	0	0
Net Impairment Losses Recognized in Earnings	-7	-0.8
Total Revenues	499.2	554.6
Expenses:
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	297.7	327.9
Insurance Expenses	144.9	152.1
Loss from Early Extinguishment of Debt	9.1	0
Interest and Other Expenses	29.7	22.7
Total Expenses	481.4	502.7
Income from Continuing Operations before Income Taxes	17.8	51.9
Income Tax Expense	-4.3	-16.7
Income from Continuing Operations	13.5	35.2
Loss from Discontinued Operations	0	-0.1
Net Income	$13.50	$35.10
Income from Continuing Operations Per Unrestricted Share:
Basic (in dollars per share)	$0.26	$0.63
Diluted (in dollars per share)	$0.26	$0.63
Net Income Per Unrestricted Share:
Basic (in dollars per share)	$0.26	$0.63
Diluted (in dollars per share)	$0.26	$0.63
Dividends Paid to Shareholders Per Share (in dollars per share)	$0.24	$0.24

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$13.50	$35.10
Other Comprehensive Income Before Income Taxes:
Unrealized Holding Gains	53.3	120
Foreign Currency Translation Adjustments	-0.9	0
Amortization of Unrecognized Postretirement Benefit Costs	5.4	2
Other Comprehensive Income Before Income Taxes	57.8	122
Other Comprehensive Income Tax Expense	-20.2	-43.1
Other Comprehensive Income	37.6	78.9
Total Comprehensive Income	$51.10	$114

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Assets:
Fixed Maturities at Fair Value (Amortized Cost: 2015 - $4,317.2; 2014 - $4,341.7)	$4,803.10	$4,777.60
Equity Securities at Fair Value (Cost: 2015 - $555.5; 2014 - $561.5)	628.6	632.2
Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings	168.1	184.8
Fair Value Option Investments	54.2	53.3
Short-term Investments at Cost which Approximates Fair Value	357.3	342.2
Other Investments	450.1	449.6
Total Investments	6,461.40	6,439.70
Cash	87.7	76.1
Receivables from Policyholders	293.1	295.3
Other Receivables	197	187
Deferred Policy Acquisition Costs	305.6	303.3
Goodwill	311.8	311.8
Current Income Tax Assets	10.9	0
Other Assets	217.5	220.2
Total Assets	7,885	7,833.40
Insurance Reserves:
Life and Health	3,299.50	3,273.70
Property and Casualty	720.1	733.9
Total Insurance Reserves	4,019.60	4,007.60
Unearned Premiums	530	536.9
Liabilities for Income Taxes	58.2	36.5
Debt at Amortized Cost (Fair Value: 2015 - $804.1; 2014 - $804.4)	750	752.1
Accrued Expenses and Other Liabilities	417.3	409.6
Total Liabilities	5,775.10	5,742.70
Shareholders' Equity:
Common Stock, $0.10 Par Value, 100 Million Shares Authorized; 51,826,395 Shares Issued and Outstanding at March 31, 2015 and 52,418,246 Shares Issued and Outstanding at December 31, 2014	5.2	5.2
Paid-in Capital	655.1	660.1
Retained Earnings	1,189.30	1,202.70
Accumulated Other Comprehensive Income	260.3	222.7
Total Shareholders' Equity	2,109.90	2,090.70
Total Liabilities and Shareholders' Equity	$7,885	$7,833.40

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, except Share data, unless otherwise specified
Amortized Cost of Fixed Maturity Securities	$4,317.20	$4,341.70
Equity Securities at Cost	555.5	561.5
Fair Value of Notes Payable	$804.10	$804.40
Common Stock, Par Value	$0.10	$0.10
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	51,826,395	52,418,246
Common Stock, Shares, Outstanding	51,826,395	52,418,246

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating Activities:
Net Income	$13.50	$35.10
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Decrease (Increase) in Deferred Policy Acquisition Costs	-2.3	1.1
Amortization of Life Insurance in Force Acquired and Customer Relationships Acquired	1.6	1.8
Equity in Loss (Earnings) of Equity Method Limited Liability Investments	0.7	-3.5
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	0.4	7
Increase in Value of Fair Value Option Investments Reported in Investment Income	-0.9	0
Amortization of Investment Securities and Depreciation of Investment Real Estate	2.7	3.8
Net Realized Gains on Sales of Investments	-3.4	-6.6
Net Impairment Losses Recognized in Earnings	7	0.8
Loss from Early Extinguishment of Debt	9.1	0
Depreciation of Property and Equipment	3.2	4.3
Increase in Receivables	-8.4	-13.6
Increase in Insurance Reserves	11.5	6
Decrease in Unearned Premiums	-6.9	-16.4
Change in Income Taxes	-10.5	10.1
Increase in Accrued Expenses and Other Liabilities	1.9	2.3
Other, Net	9.8	4.9
Net Cash Provided by Operating Activities	29	37.1
Investing Activities:
Sales, Paydowns and Maturities of Fixed Maturities	121.7	188.8
Purchases of Fixed Maturities	-92.3	-98.6
Sales of Equity Securities	18.7	35.1
Purchases of Equity Securities	-11.7	-67
Return of Investment of Equity Method Limited Liability Investments	16.3	10.1
Acquisitions of Equity Method Limited Liability Investments	-4.7	-7.5
Increase in Short-term Investments	-15.2	-224.8
Improvements of Investment Real Estate	-0.6	-0.8
Sales of Investment Real Estate	0	0.9
Increase in Other Investments	-1.1	-1.8
Acquisition of Software	-2.9	-3
Disposition of Subsidiary, Net of Cash Disposed	0	8.9
Other, Net	-0.5	-2.5
Net Cash Provided (Used) by Investing Activities	27.7	-162.2
Financing Activities:
Net Proceeds from Issuances of Debt	267.8	144.2
Repayments of Debt	279.3	0
Common Stock Repurchases	-23.4	-7.7
Dividends and Dividend Equivalents Paid	-12.3	-13.3
Cash Exercise of Stock Options	1.6	0
Other, Net	0.5	0.4
Net Cash Provided (Used) by Financing Activities	-45.1	123.6
Increase (Decrease) in Cash	11.6	-1.5
Cash, Beginning of Year	76.1	66.5
Cash, End of Period	$87.70	$65

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
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.
	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 2014 Annual Report.
	Adoption of New Accounting Guidance
	In January 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-01, Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. ASU 2015-01 is effective for interim and annual periods beginning after December 15, 2015 with early adoption permitted. The amendments in ASU 2015-01 can be applied either prospectively or retrospectively. The Company adopted ASU 2015-01 beginning with these interim condensed consolidated financial statements. The retrospective application had no impact on the Company’s previously issued financial statements.
	In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. The amendments in ASU 2015-02 affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. All legal entities are subject to reevaluation under the revised consolidation model. Specifically, the amendments modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities while also eliminating the presumption that a general partner should consolidate a limited partnership. ASU 2015-02 may also affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. ASU 2015-02 is effective for fiscal years beginning after December 15, 2015 and interim periods within those years with early adoption being permissible. The Company is currently evaluating the impact of this guidance on its financial statements.
	In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 simplifies the presentation of debt issuance costs by requiring that they be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by ASU 2015-03. The Company adopted ASU 2015-03 beginning with these interim condensed consolidated financial statements. The retrospective application had no impact on the Company’s previously issued financial statements.
	All other recently issued accounting pronouncements with effective dates prior to April 1, 2015 have been adopted by the Company. There were no adoptions in 2014 or the three months ended March 31, 2015 that had a material impact on the Condensed Consolidated Financial Statements. All other recently issued accounting pronouncements with effective dates after March 31, 2015 are not expected to have a material impact on the Company’s financial statements.

Investments

Investments	3 Months Ended
	Mar. 31, 2015
Investments Disclosures [Abstract]
Investments	Note 2 - Investments
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at March 31, 2015 were:
			Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)		Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities		$	307		$	34		$	(0.7	)	$	340.3
	States and Political Subdivisions		1,355.90			134.7			(0.4		)	1,490.20
	Corporate Securities:
	Bonds and Notes		2,575.40			322.5			(7.0		)	2,890.90
	Redeemable Preferred Stocks		5.9			0.5			—			6.4
	Collateralized Loan Obligations		69.1			0.9			(0.1		)	69.9
	Other Mortgage- and Asset-backed		3.9			1.5			—			5.4
	Investments in Fixed Maturities		$	4,317.20		$	494.1		$	(8.2	)	$	4,803.10
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 were:
			Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)		Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities		$	315.2		$	32.3		$	(2.0	)	$	345.5
	States and Political Subdivisions		1,352.50			126.4			(1.8		)	1,477.10
	Corporate Securities:
	Bonds and Notes		2,599.30			294.3			(15.1		)	2,878.50
	Redeemable Preferred Stocks		5.9			0.8			—			6.7
	Collateralized Loan Obligations		64.9			0.3			(0.8		)	64.4
	Other Mortgage- and Asset-backed		3.9			1.5			—			5.4
	Investments in Fixed Maturities		$	4,341.70		$	455.6		$	(19.7	)	$	4,777.60
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at March 31, 2015 by contractual maturity were:
	(Dollars in Millions)		Amortized Cost			Fair Value
	Due in One Year or Less		$	44.1		$	44.9
	Due after One Year to Five Years		741.1			795.5
	Due after Five Years to Ten Years		1,338.50			1,414.50
	Due after Ten Years		1,994.30			2,336.50
	Mortgage- and Asset-backed Securities Not Due at a Single Maturity Date		199.2			211.7
	Investments in Fixed Maturities		$	4,317.20		$	4,803.10
	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 Mortgage- and Asset-backed Securities Not Due at a Single Maturity Date at March 31, 2015 consisted of securities issued by the Government National Mortgage Association with a fair value of $127.4 million, securities issued by the Federal National Mortgage Association with a fair value of $8.7 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 $75.3 million.
	Note 2 - Investments (continued)
	There were no unsettled sales of Investments in Fixed Maturities at March 31, 2015 or December 31, 2014. Accrued Expenses and Other Liabilities included unsettled purchases of Investments in Fixed Maturities of $6.1 million at March 31, 2015, all of which settled in the following month. There were no unsettled purchases of Investments in Fixed Maturities at December 31, 2014.
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at March 31, 2015 were:
						Gross Unrealized
	(Dollars in Millions)		Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate		$	85.5		$	5.8		$	(0.8	)	$	90.5
	Other Industries		16.3			3.6			(0.7		)	19.2
	Common Stocks:
	Manufacturing		41.2			15			—			56.2
	Other Industries		52.2			16.3			(0.6		)	67.9
	Other Equity Interests:
	Exchange Traded Funds		195.3			10.4			(0.6		)	205.1
	Limited Liability Companies and Limited Partnerships		165			27.5			(2.8		)	189.7
	Investments in Equity Securities		$	555.5		$	78.6		$	(5.5	)	$	628.6
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2014 were:
						Gross Unrealized
	(Dollars in Millions)		Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate		$	85.5		$	5.2		$	(1.0	)	$	89.7
	Other Industries		16.3			3.5			—			19.8
	Common Stocks:
	Manufacturing		43.4			14.9			(1.1		)	57.2
	Other Industries		60.8			16.2			(0.4		)	76.6
	Other Equity Interests:
	Exchange Traded Funds		195.2			8.2			(0.7		)	202.7
	Limited Liability Companies and Limited Partnerships		160.3			27.7			(1.8		)	186.2
	Investments in Equity Securities		$	561.5		$	75.7		$	(5.0	)	$	632.2
	Note 2 - Investments (continued)
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at March 31, 2015 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		$	28.7		$	(0.2	)	$	25.5		$	(0.5	)	$	54.2	$	(0.7	)
States and Political Subdivisions		54.1			(0.4		)	1			—			55.1		(0.4		)
Corporate Securities:
Bonds and Notes		221.1			(4.3		)	93.3			(2.7		)	314.4		(7.0		)
Redeemable Preferred Stocks		1.7			—			—			—			1.7		—
Collateralized Loan Obligations		20.4			(0.1		)	3.5			—			23.9		(0.1		)
Other Mortgage- and Asset-backed		—			—			0.4			—			0.4		—
Total Fixed Maturities		326			(5.0		)	123.7			(3.2		)	449.7		(8.2		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate		7.2			(0.4		)	12.6			(0.4		)	19.8		(0.8		)
Other Industries		6.5			(0.7		)	0.5			—			7		(0.7		)
Common Stocks:
Other Industries		2			(0.6		)	—			—			2		(0.6		)
Other Equity Interests:
Exchange Traded Funds		—			—			14.5			(0.6		)	14.5		(0.6		)
Limited Liability Companies and Limited Partnerships		94.3			(2.2		)	12.6			(0.6		)	106.9		(2.8		)
Total Equity Securities		110			(3.9		)	40.2			(1.6		)	150.2		(5.5		)
Total		$	436		$	(8.9	)	$	163.9		$	(4.8	)	$	599.9	$	(13.7	)
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.
Unrealized losses on fixed maturities, which the Company has determined to be temporary at March 31, 2015, were $8.2 million, of which $3.2 million was related to fixed maturities that were in an unrealized loss position for 12 months or longer. There were $0.1 million unrealized losses at March 31, 2015 related to securities for which the Company has recognized credit losses in earnings in the preceding table under the heading “Less Than 12 Months.” There were no unrealized losses included in the preceding table under the heading “12 Months or Longer” related to securities for which the Company has recognized credit losses in earnings. Investment-grade fixed maturity investments comprised $3.5 million, and below-investment-grade fixed maturity investments comprised $4.7 million of the unrealized losses on investments in fixed maturities at March 31, 2015. 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 March 31, 2015, 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 March 31, 2015 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.
Note 2 - Investments (continued)
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 March 31, 2015 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 some of 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 March 31, 2015.
An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 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		$	24.9		$	(0.7	)	$	55.5		$	(1.3	)	$	80.4	$	(2.0	)
States and Political Subdivisions		1			—			126.3			(1.8		)	127.3		(1.8		)
Corporate Securities:
Bonds and Notes		250.4			(5.1		)	360.5			(10.0		)	610.9		(15.1		)
Collateralized Loan Obligations		51.2			(0.7		)	3.4			(0.1		)	54.6		(0.8		)
Other Mortgage- and Asset-backed		—			—			0.4			—			0.4		—
Total Fixed Maturities		327.5			(6.5		)	546.1			(13.2		)	873.6		(19.7		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate		7.5			(0.1		)	12.1			(0.9		)	19.6		(1.0		)
Other Industries		—			—			0.5			—			0.5		—
Common Stocks:
Manufacturing		15.1			(1.1		)	—			—			15.1		(1.1		)
Other Industries		4.2			(0.4		)	1			—			5.2		(0.4		)
Other Equity Interests:
Exchange Traded Funds		14.9			(0.1		)	14.4			(0.6		)	29.3		(0.7		)
Limited Liability Companies and Limited Partnerships		54.4			(1.5		)	6.6			(0.3		)	61		(1.8		)
Total Equity Securities		96.1			(3.2		)	34.6			(1.8		)	130.7		(5.0		)
Total		$	423.6		$	(9.7	)	$	580.7		$	(15.0	)	$	1,004.30	$	(24.7	)
Note 2 - Investments (continued)
Unrealized losses on fixed maturities, which the Company has determined to be temporary at December 31, 2014, were $19.7 million, of which $13.2 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, 2014 related to securities for which the Company has recognized credit losses in earnings in the preceding table under the headings “Less Than 12 Months” or “12 Months or Longer.” Investment-grade fixed maturity investments comprised $14.1 million and below-investment-grade fixed maturity investments comprised $5.6 million of the unrealized losses on investments in fixed maturities at December 31, 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 December 31, 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 recovery of its amortized cost basis, which may be at maturity. Based on the Company’s evaluation at December 31, 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 recovery of 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, 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 some of 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 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, 2014.
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.
		Three Months Ended
(Dollars in Millions)		Mar 31,			Mar 31,
		2015			2014
Balance at Beginning of Period		$	5.3		$	9.9
Increases to Previously Recognized OTTI Credit Losses		—			0.3
Balance at End of Period		$	5.3		$	10.2
Note 2 - Investments (continued)
Gross gains and losses on sales of investments in fixed maturities and equity securities for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
(Dollars in Millions)		Mar 31,			Mar 31,
		2015			2014
Fixed Maturities:
Gains on Sales		$	2		$	4.4
Losses on Sales		(0.1		)	—
Equity Securities:
Gains on Sales		1.5			0.8
Losses on Sales		—			—
Equity Method Limited Liability Investments include investments in limited liability investment companies and limited partnerships in which the Company’s interests are not deemed minor and are accounted for under the equity method of accounting. The Company’s investments in Equity Method Limited Liability Investments are generally of a passive nature in that the Company does not take an active role in the management of the investment entity. The Company’s maximum exposure to loss at March 31, 2015 is limited to the total carrying value of $168.1 million. In addition, the Company had outstanding commitments totaling approximately $40.3 million to fund Equity Method Limited Liability Investments at March 31, 2015.
The carrying values of the Company’s Other Investments at March 31, 2015 and December 31, 2014 were:
(Dollars in Millions)		Mar 31,			Dec 31,
		2015			2014
Loans to Policyholders at Unpaid Principal		$	284.5		$	283.4
Real Estate at Depreciated Cost		160.3			160.9
Trading Securities at Fair Value		4.9			4.9
Other		0.4			0.4
Total		$	450.1		$	449.6

Property_and_Casualty_Insuranc

Property and Casualty Insurance Reserves	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	733.9		$	843.5
	Less Reinsurance Recoverables at Beginning of Year	54.9			63.4
	Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	679			780.1
	Incurred Losses and LAE Related to:
	Current Year:
	Continuing Operations	214.2			253
	Prior Years:
	Continuing Operations	(7.4		)	(15.2		)
	Discontinued Operations	—			0.2
	Total Incurred Losses and LAE Related to Prior Years	(7.4		)	(15.0		)
	Total Incurred Losses and LAE	206.8			238
	Paid Losses and LAE Related to:
	Current Year:
	Continuing Operations	91.1			108.4
	Prior Years:
	Continuing Operations	126			140.1
	Discontinued Operations	1.8			2.2
	Total Paid Losses and LAE Related to Prior Years	127.8			142.3
	Total Paid Losses and LAE	218.9			250.7
	Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	666.9			767.4
	Plus Reinsurance Recoverables at End of Period	53.2			62.2
	Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	$	720.1		$	829.6
	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 three months ended March 31, 2015, the Company reduced its property and casualty insurance reserves by $7.4 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance losses and LAE reserves developed favorably by $7.2 million, and commercial lines insurance losses and LAE reserves developed favorably by $0.2 million. Personal automobile insurance losses and LAE reserves developed favorably by $5.1 million, homeowners insurance losses and LAE reserves developed favorably by $2.6 million, and other personal lines losses and LAE reserves developed adversely by $0.5 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 2013 and 2012 accident years, partially offset by the emergence of worse than expected loss patterns for the 2014 accident year.
	Note 3 - Property and Casualty Insurance Reserves (continued)
	For the three months ended March 31, 2014, the Company reduced its property and casualty insurance reserves by $15.0 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance losses and LAE reserves developed favorably by $14.7 million, and commercial lines insurance losses and LAE reserves developed favorably by $0.3 million. The commercial lines insurance losses and LAE reserves included favorable development of $0.5 million from continuing operations and unfavorable development of $0.2 million from discontinued operations. Personal automobile insurance losses and LAE reserves developed favorably by $11.5 million, homeowners insurance losses and LAE reserves developed favorably by $2.8 million, and other personal lines losses and LAE reserves developed favorably by $0.4 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	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Note 4 - Debt
	The amortized cost of debt outstanding at March 31, 2015 and December 31, 2014 was:
	(Dollars in Millions)	Mar 31,			Dec 31,
		2015			2014
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	—		$	249.5
	6.00% Senior Notes due May 15, 2017	358.6			358.5
	4.35% Senior Notes due February 15, 2025	247.3			—
	7.375% Subordinated Debentures due February 27, 2054	144.1			144.1
	Total Debt Outstanding	$	750		$	752.1
	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, Trinity Universal Insurance Company (“Trinity”) and United Insurance Company of America (“United Insurance”). 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 March 31, 2015 or December 31, 2014.
	Trinity and United Insurance are members of the Federal Home Loan Bank (“FHLB”) of Dallas and Chicago, respectively. As members, Trinity and United Insurance may obtain advances from the FHLB of Dallas and Chicago, respectively. Advances from the FHLB of Dallas and Chicago are subject to collateral requirements as specified in the respective agreements with Trinity and United Insurance. During the first three months of 2015, Trinity borrowed and repaid $20.5 million under its agreement with the FHLB of Dallas. There were no advances from the FHLB of Dallas or Chicago outstanding at either March 31, 2015 or December 31, 2014.
	On February 24, 2015, Kemper issued $250.0 million of its 4.35% senior notes due February 15, 2025 (the “2025 Senior Notes”). The net proceeds of the issuance were $247.3 million, net of discount and transaction costs, for an effective yield of 4.49%. The 2025 Senior Notes are unsecured and may be redeemed in whole at any time or in part from time to time at Kemper’s option at specified redemption prices. Kemper used the net proceeds from the sale of the 2025 Senior Notes, together with available cash, to redeem in full the $250.0 million outstanding principal amount of its 6.00% Senior Notes due November 30, 2015. Kemper recognized a loss of $9.1 million before income taxes for the three months ended March 31, 2015 from the early redemption of these senior notes.
	Note 4 - Debt (Continued)
	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Notes Payable under Revolving Credit Agreement	$	0.2		$	0.2
	Federal Home Loan Bank of Dallas	—			—
	Federal Home Loan Bank of Chicago	—			—
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	3.7			3.9
	6.00% Senior Notes due May 15, 2017	5.6			5.5
	4.35% Senior Notes due February 15, 2025	1.1			—
	7.375% Subordinated Debentures due February 27, 2054	2.8			1
	Interest Expense before Capitalization of Interest	13.4			10.6
	Capitalization of Interest	(0.2		)	(0.3		)
	Total Interest Expense	$	13.2		$	10.3
	Interest paid, including facility fees, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Notes Payable under Revolving Credit Agreement	$	0.2		$	0.2
	Federal Home Loan Bank of Dallas	—			—
	Federal Home Loan Bank of Chicago	—			—
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	4.8			—
	6.00% Senior Notes due May 15, 2017	—			—
	4.35% Senior Notes due February 15, 2025	—			—
	7.375% Subordinated Debentures due February 27, 2054	2.8			—
	Total Interest Paid	$	7.8		$	0.2

Longterm_Equitybased_Compensat

Long-term Equity-based Compensation Plans	3 Months Ended
	Mar. 31, 2015
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 March 31, 2015, there were 7,834,964 common shares available for future grants under Kemper’s long-term equity-based compensation plan, of which 540,900 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 $2.2 million and $2.6 million for the three months ended March 31, 2015 and 2014, respectively. Total unamortized compensation expense related to nonvested awards at March 31, 2015 was $8.2 million, which is expected to be recognized over a weighted-average period of 2.1 years.
	Outstanding equity-based compensation awards at March 31, 2015 consisted of tandem stock option and stock appreciation rights (“Tandem Awards”), time-vested restricted stock, time-vested RSUs, performance-based restricted stock, performance-based RSUs and deferred stock units (“DSUs”). Recipients of restricted stock receive full dividend and voting rights on the same basis as all other outstanding shares of Kemper common stock. Recipients of RSUs and DSUs receive full dividend equivalents on the same basis as all other outstanding shares of Kemper common stock, but do not receive voting rights until such shares are issued.
	Except for equity-based compensation awards granted to each member of the Board of Directors who is not employed by the Company (“Non-employee Directors”), all outstanding awards are subject to forfeiture until certain restrictions have lapsed.
	Note 5 - Long-term Equity-based Compensation Plans (continued)
	The Company uses the Black-Scholes option pricing model to estimate the fair value of each Tandem Award on the date of grant. The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the three months ended March 31, 2015 and 2014 were as follows:
		Three Months Ended
		Mar 31, 2015					Mar 31, 2014
	Range of Valuation Assumptions
	Expected Volatility	22.49	%	-	41.65	%	25.76	%	-	44.43	%
	Risk-free Interest Rate	1.08		-	1.63		1.07		-	2.14
	Expected Dividend Yield	2.62		-	2.62		2.6		-	2.6
	Weighted-Average Expected Life in Years
	Employee Grants	4		-	7		4		-	7
	Director Grants	5.5					NA
	Tandem Award activity for the three months ended March 31, 2015 is presented below.
		Shares Subject			Weighted-			Weighted-		Aggregate
		to Awards			average			average		Intrinsic Value
					Exercise Price			Remaining		($ in Millions)
					Per Share ($)			Contractual Life
								(in Years)
	Outstanding at Beginning of the Year	2,265,711			$	39.74
	Granted	265,750			36.17
	Exercised	(239,250	)		28.16
	Forfeited or Expired	(427,024	)		46.23
	Outstanding at March 31, 2015	1,865,187			$	39.23		5.08		$	5.5
	Vested and Expected to Vest at March 31, 2015	1,821,284			$	39.34		5		$	5.3
	Exercisable at March 31, 2015	1,295,183			$	40.96		3.38		$	3.4
	The weighted-average grant-date fair values of Tandem Awards granted during the three months ended March 31, 2015 and 2014 were $8.06 per option and $10.18 per option, respectively. Total intrinsic value of Tandem Awards exercised was $2.3 million and $0.3 million for the three months ended March 31, 2015 and 2014, respectively. The total tax benefit realized for tax deductions from exercises of Tandem Awards was $0.8 million and $0.1 million for the three months ended March 31, 2015 and 2014, respectively. Total cash received from exercises of Tandem Awards was $1.6 million for the three months ended March 31, 2015 and insignificant for the same period in 2014.
	Note 5 - Long-term Equity-based Compensation Plans (continued)
	Information pertaining to Tandem Awards outstanding at March 31, 2015 is presented below.
								Outstanding						Exercisable
	Range of Exercise Prices Per Share ($)							Shares			Weighted-		Weighted-	Shares	Weighted-
								Subject to Awards			average		average	Subject to Tandem	average
											Exercise Price		Remaining	Awards	Exercise Price
											Per Share ($)		Contractual		Per Share ($)
													Life (in Years)
	$	15.01		-	$	20		8,000			$	16.48	4.1	8,000	$	16.48
	20.01			-	25			21,500			23.26		4.81	21,500	23.26
	25.01			-	30			187,125			29.12		6.43	141,123	28.97
	30.01			-	35			210,000			33.13		7.83	118,000	32.89
	35.01			-	40			821,125			36.67		7.02	389,123	37.1
	40.01			-	45			—			—		—	—	—
	45.01			-	50			616,045			48.61		1.21	616,045	48.61
	50.01			-	55			1,392			50.04		0.1	1,392	50.04
	15.01			-	55			1,865,187			39.23		5.09	1,295,183	40.96
	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 three months ended March 31, 2015 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	53,095			$	32.42		30,024			$	36.6
	Granted	—			—			47,375			36.17
	Vested	—			—			—			—
	Forfeited	(3,651	)		29.18			(800	)		36.4
	Nonvested Balance at End of Period	49,444			32.66			76,599			36.34
	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 three months ended March 31, 2015 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	110,625			$	39.28		61,875			$	40.5
Granted	—			—			68,825			43.05
Vested	—			—			—			—
Forfeited	(59,225	)		36.81			(1,800	)		41.49
Nonvested Balance at End of Period	51,400			42.12			128,900			41.85
Note 5 - Long-term Equity-based Compensation Plans (continued)
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, and any forfeitures of shares for performance below the “target” performance level, 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 2015, 2014 and 2013 three-year performance periods was 68,125 common shares, 60,775 common shares and 51,400 common shares, respectively, at March 31, 2015. For the 2012 three-year performance period, the Company was below the minimum performance level, and all of the related 57,775 shares of performance-based restricted stock were forfeited on January 31, 2015, the three-year anniversary of their grant date.
The total fair value of the shares of restricted stock that vested during the three months ended March 31, 2014 and the additional shares that were issued in connection with the 2011 performance-based restricted stock awards was $2.4 million. The tax benefit for tax deductions realized from such shares was $0.8 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 three months ended March 31, 2015 was as follows:
	Number of DSUs			Weighted-
				Average
				Grant-Date
				Fair Value
				Per DSU
Vested Balance at Beginning of the Year	8,000			$	34.52
Granted and Vested	—			—
Vested Balance at End of Period	8,000			34.52

Income_from_Continuing_Operati

Income from Continuing Operations Per Unrestricted Share	3 Months Ended
	Mar. 31, 2015
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 also 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 three months ended March 31, 2015 and 2014 is as follows:
		Three Months Ended
		Mar 31,				Mar 31,
		2015				2014
	(Dollars in Millions)
	Income from Continuing Operations	$	13.5			$	35.2
	Less Income (Loss) from Continuing Operations Attributed to Participating Awards	(0.1		)		0.2
	Income from Continuing Operations Attributed to Unrestricted Shares	13.6				35
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—				—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	13.6			$	35
	(Number of Shares in Thousands)
	Weighted-average Unrestricted Shares Outstanding	51,872.80				55,312.90
	Equity-based Compensation Equivalent Shares	96.5				130.2
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	51,969.30				55,443.10
	(Per Unrestricted Share in Whole Dollars)
	Basic Income from Continuing Operations Per Unrestricted Share	$	0.26			$	0.63
	Diluted Income from Continuing Operations Per Unrestricted Share	$	0.26			$	0.63
	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 three months ended March 31, 2015 and 2014 because the exercise prices for the options exceeded the average market price is presented below.
		Three Months Ended
	(Number of Shares in Thousands)	Mar 31,			Mar 31,
		2015			2014
	Equity-based Compensation Equivalent Shares	1,244.10			1,250.10
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,244.10			1,250.10

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income	Note 7 - Other Comprehensive Income and Accumulated Other Comprehensive Income
	The components of Other Comprehensive Income Before Income Taxes for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$	49.7		$	124.4
	Reclassification Adjustment for Amounts Included in Net Income	3.6			(4.4		)
	Unrealized Holding Gains (Losses)	53.3			120
	Foreign Currency Translation Adjustments	(0.9		)	—
	Amortization of Net Unrecognized Postretirement Benefit Costs	5.4			2
	Other Comprehensive Income Before Income Taxes	$	57.8		$	122
	The components of Other Comprehensive Income Tax Expense for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Other Comprehensive Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	$	(17.5	)	$	(43.9	)
	Reclassification Adjustment for Amounts Included in Net Income	(1.3		)	1.5
	Unrealized Holding Gains and Losses	(18.8		)	(42.4		)
	Foreign Currency Translation Adjustment	0.3			—
	Amortization of Net Unrecognized Postretirement Benefit Costs	(1.7		)	(0.7		)
	Other Comprehensive Income Tax Expense	$	(20.2	)	$	(43.1	)
	The components of Accumulated Other Comprehensive Income (“AOCI”) at March 31, 2015 and December 31, 2014 were:
	(Dollars in Millions)	Mar 31,			Dec 31,
		2015			2014
	Net Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	2.1		$	2.8
	Other Net Unrealized Gains on Investments	360			324.8
	Foreign Currency Translation Adjustments, Net of Income Taxes	(0.4		)	0.2
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(101.4		)	(105.1		)
	Accumulated Other Comprehensive Income	$	260.3		$	222.7
	Note 7 - Other Comprehensive Income and Accumulated Other Comprehensive Income (continued)
	Components of AOCI were reclassified to the following lines of the Condensed Consolidated Statements of Income for the three months ended March 31, 2015 and 2014:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Reclassification of AOCI from Net Unrealized Gains on Investments to:
	Net Realized Gains on Sales of Investments	$	3.4		$	5.2
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Total Before Income Taxes	(3.6		)	4.4
	Income Tax Benefit (Expense)	1.3			(1.5		)
	Reclassification from AOCI, Net of Income Taxes	(2.3		)	2.9
	Reclassification of AOCI from Amortization of Net Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(5.4		)	(2.0		)
	Income Tax Benefit	1.7			0.7
	Reclassification from AOCI, Net of Income Taxes	(3.7		)	(1.3		)
	Total Reclassification from AOCI to Net Income	$	(6.0	)	$	1.6

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 8 - Income Taxes
	The components of Liabilities for Income Taxes at March 31, 2015 and December 31, 2014 were:
	(Dollars in Millions)	Mar 31,		Dec 31,
		2015		2014
	Current Income Tax Liabilities	$	—	$	7.8
	Deferred Income Tax Liabilities	51.1		21.5
	Unrecognized Tax Benefits	7.1		7.2
	Liabilities for Income Taxes	$	58.2	$	36.5
	Income taxes paid were $14.6 million and $6.4 million for the three months ended March 31, 2015 and 2014, respectively.
	During the first quarter of 2015, the Company extended the federal statute of limitations for the 2007 through 2011 tax years until December 31, 2015. The extension was requested by the Internal Revenue Service (“IRS”) to provide the Joint Committee on Taxation (“JCT”) additional time to complete a review required by statute. In April 2015, the Company received a letter dated April 3, 2015, indicating that the JCT had completed its review and had taken no exception to the IRS’s conclusion to accept the tax returns as filed, effectively settling the extended years. Accordingly, the Company will reduce its Liability for Unrecognized Tax Benefits by $3.5 million and recognize an income tax benefit of $2.3 million in the second quarter of 2015.

Pension_Benefits_and_Postretir

Pension Benefits and Postretirement Benefits Other Than Pensions	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Service Cost Earned	$	2.6		$	2.2
	Interest Cost on Projected Benefit Obligation	6.4			6.2
	Expected Return on Plan Assets	(8.8		)	(8.7		)
	Amortization of Accumulated Net Unrecognized Pension Costs	5.8			2.3
	Total Pension Expense Recognized	$	6		$	2
	The components of Postretirement Benefits Other than Pensions Expense for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Service Cost on Benefits Earned	$	—		$	0.1
	Interest Cost on Projected Benefit Obligation	0.3			0.3
	Amortization of Accumulated Net Unrecognized Gain	(0.4		)	(0.3		)
	Total Postretirement Benefits Other than Pensions Expense (Benefit)	$	(0.1	)	$	0.1

Business_Segments

Business Segments	3 Months Ended
	Mar. 31, 2015
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 nonstandard risk, homeowners insurance, other personal insurance and commercial automobile insurance. These products are primarily distributed through independent agents and brokers, 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 and brokers.
	Earned Premiums by product line for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Personal Automobile	$	189.8		$	216.3
	Homeowners	72.6			79.7
	Other Personal Property and Casualty Insurance	30.6			32.1
	Commercial Automobile	13.5			13.1
	Life	88			97.6
	Accident and Health	36.8			38.8
	Total Earned Premiums	$	431.3		$	477.6
	Note 10 - Business Segments (continued)
	Segment Revenues, including a reconciliation to Total Revenues, for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	287.6		$	322.3
	Net Investment Income	14.8			17.6
	Other Income	0.3			0.1
	Total Property & Casualty Insurance	302.7			340
	Life & Health Insurance:
	Earned Premiums	143.7			155.3
	Net Investment Income	50.4			50.2
	Other Income	0.8			—
	Total Life & Health Insurance	194.9			205.5
	Total Segment Revenues	497.6			545.5
	Net Realized Gains on Sales of Investments	3.4			6.6
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Other	5.2			3.3
	Total Revenues	$	499.2		$	554.6
	Segment Operating Profit, including a reconciliation to Income from Continuing Operations before Income Taxes, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Segment Operating Profit:
	Property & Casualty Insurance	$	18		$	19.3
	Life & Health Insurance	24.8			34.6
	Total Segment Operating Profit	42.8			53.9
	Corporate and Other Operating Loss	(12.3		)	(7.8		)
	Total Operating Profit	30.5			46.1
	Net Realized Gains on Sales of Investments	3.4			6.6
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Loss from Early Extinguishment of Debt	(9.1		)	—
	Income from Continuing Operations before Income Taxes	$	17.8		$	51.9
	Note 10 - Business Segments (continued)
	Segment Net Operating Income, including a reconciliation to Income from Continuing Operations, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Segment Net Operating Income :
	Property & Casualty Insurance	$	13.4		$	14.4
	Life & Health Insurance	16.1			22.1
	Total Segment Net Operating Income	29.5			36.5
	Corporate and Other Net Operating Loss	(7.7		)	(5.0		)
	Consolidated Net Operating Income	21.8			31.5
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	2.2			4.2
	Net Impairment Losses Recognized in Earnings	(4.6		)	(0.5		)
	Loss from Early Extinguishment of Debt	(5.9		)	—
Income from Continuing Operations	$	13.5		$	35.2

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
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 has elected the fair value option method of accounting for investments in certain hedge funds and, accordingly, 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 March 31, 2015 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	$	130.7			$	209.6			$	—		$	340.3
	States and Political Subdivisions	—				1,490.20				—			1,490.20
	Corporate Securities:
	Bonds and Notes	—				2,516.10				374.8			2,890.90
	Redeemable Preferred Stocks	—				—				6.4			6.4
	Collateralized Loan Obligations	—				—				69.9			69.9
	Other Mortgage- and Asset-backed	—				1.5				3.9			5.4
	Total Investments in Fixed Maturities	130.7				4,217.40				455			4,803.10
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				85.8				4.7			90.5
	Other Industries	—				7.1				12.1			19.2
	Common Stocks:
	Manufacturing	49.5				5.9				0.8			56.2
	Other Industries	51.5				0.8				15.6			67.9
	Other Equity Interests:
	Exchange Traded Funds	205.1				—				—			205.1
	Limited Liability Companies and Limited Partnerships	—				—				189.7			189.7
	Total Investments in Equity Securities	306.1				99.6				222.9			628.6
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				54.2			54.2
	Other Investments:
	Trading Securities	4.9				—				—			4.9
	Total	$	441.7			$	4,317.00			$	732.1		$	5,490.80
	At March 31, 2015, the Company had unfunded commitments to invest an additional $113.2 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, 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	$	129.2			$	216.3			$	—		$	345.5
	States and Political Subdivisions	—				1,477.10				—			1,477.10
	Corporate Securities:
	Bonds and Notes	—				2,517.90				360.6			2,878.50
	Redeemable Preferred Stocks	—				—				6.7			6.7
	Collateralized Loan Obligations	—				—				64.4			64.4
	Other Mortgage- and Asset-backed	—				1.5				3.9			5.4
	Total Investments in Fixed Maturities	129.2				4,212.80				435.6			4,777.60
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				84.7				5			89.7
	Other Industries	—				3.4				16.4			19.8
	Common Stocks:
	Manufacturing	50.9				5.7				0.6			57.2
	Other Industries	59				0.8				16.8			76.6
	Other Equity Interests:
	Exchange Traded Funds	202.7				—				—			202.7
	Limited Liability Companies and Limited Partnerships	—				—				186.2			186.2
	Total Investments in Equity Securities	312.6				94.6				225			632.2
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				53.3			53.3
	Other Investments:
Trading Securities	4.9				—				—			4.9
Total	$	446.7			$	4,307.40			$	713.9		$	5,468.00
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
Note 11 - Fair Value Measurements (continued)
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 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.
The Company’s Investments in Fixed Maturities that are classified as Level 3 in the two preceding tables primarily consist of privately placed securities not rated by a Nationally Recognized Statistical Rating Organization and are priced primarily 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 March 31, 2015.
(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted-average Yield
Investment-grade	Market Yield		$	109			2.6	%	-	6.9	%	3.6	%
Non-investment-grade:
Senior Debt	Market Yield		93.3				3.6		-	14.5		9.9
Junior Debt	Market Yield		159.4				8.2		-	21.5		13.4
Collateralized Loan Obligations	Market Yield		69.9				2.5		-	7.7		4.9
Other	Various		23.4
Total Fixed Maturity Investments in Corporate Securities			$	455
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, 2014.
(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted-average Yield
Investment-grade	Market Yield		$	107			2.8	%	-	6.9	%	3.9	%
Non-investment-grade:
Senior Debt	Market Yield		92.7				3.8		-	14.5		10.6
Junior Debt	Market Yield		149.9				8.2		-	21		13.4
Collateralized Loan Obligations	Market Yield		64.4				2.7		-	8.1		5.2
Other Debt	Various		21.6
Total Fixed Maturity Investments in Corporate Securities			$	435.6
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, unless callable at a premium, if the security is currently callable.
The Company’s other investments that are classified as Level 3 primarily consist of Limited Liability Companies and Limited Partnerships, but also certain Preferred Stocks and Common Stocks. The Company either uses valuations provided by third party fund managers or third party appraisers, or that are generated internally. These valuations typically employ various valuation techniques commonly used in the industry, including earnings multiples based on comparable public securities, industry-specific non-earnings based multiples, market yields based on comparable public securities and discounted cash flow models.
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 March 31, 2015 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	$	360.6			$	6.7			$	64.4		$	3.9		$	38.8		$	186.2		$	53.3		$	713.9
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	(2.3		)		—				0.1			—			(0.8		)	(1.0		)	0.9			(3.1		)
Included in Other Comprehensive Income	2.4				(0.3		)		1.3			—			(0.7		)	(1.2		)	—			1.5
Purchases	36.2				—				4.1			—			0.4			11.2			—			51.9
Settlements	(4.2		)		—				—			—			—			(9.6		)	—			(13.8		)
Sales	(17.9		)		—				—			—			(0.7		)	—			—			(18.6		)
Transfers into Level 3	—				—				—			—			—			4.1			—			4.1
Transfers out of Level 3	—				—				—			—			(3.8		)	—			—			(3.8		)
Balance at End of Period	$	374.8			$	6.4			$	69.9		$	3.9		$	33.2		$	189.7		$	54.2		$	732.1
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 three months ended March 31, 2015. The transfers out of Level 3 for the three months ended March 31, 2015 were due to changes in the availability of market observable inputs. The $4.1 million transfers into Level 3 for the three months ended March 31, 2015 relates to an investment that changed from an Equity Method Limited Liability investment to Other Equity Interest at Fair Value.
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 March 31, 2014 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	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	626.7
Total Gains (Losses):
Included in Condensed Consolidated Statement of Income	0.1				—				—			0.1			—			0.2			0.4
Included in Other Comprehensive Income	2.5				0.2				0.3			—			3.4			6.9			13.3
Purchases	48.3				—				—			—			2.6			12.3			63.2
Settlements	(24.8		)		(0.1		)		—			(0.8		)	—			(5.3		)	(31.0		)
Sales	(10.2		)		—				—			—			—			(0.7		)	(10.9		)
Transfers out of Level 3	(0.6		)		—				—			—			—			—			(0.6		)
Balance at End of Period	$	379.4			$	7.5			$	45		$	3.8		$	38.1		$	187.3		$	661.1
There were no transfers between Levels 1 and 2 or Levels 1 and 3 for the three months ended March 31, 2014. Transfers out of Level 3 for the three months ended March 31, 2014 were due to changes in the availability of market observable inputs.
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	3 Months Ended
	Mar. 31, 2015
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 condensed consolidated financial statements.
	Over the last several years, certain state insurance regulators, legislators, treasurers/controllers, and their respective agents have pursued 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. These initiatives together comprise a set of circumstances involving potential changes in the law or changes in the interpretation of existing laws that could have the effect of altering the terms of Kemper’s life insurance subsidiaries’ (the “Life Companies”) existing life insurance contracts by imposing new requirements that did not exist and were not contemplated at the time the Life Companies entered into such contracts.
	Legislation. One type of initiative involves legislation (the “DMF Statutes”). DMF Statutes have been enacted in Idaho, Iowa, Kentucky, Maryland, Montana, Nevada, New York, North Dakota, Rhode Island and Vermont, with varying effective dates, 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 DMF Statute) against the database of reported deaths maintained by the Social Security Administration or a comparable database (a “Death Master File”). In contrast, New Mexico, Tennessee and Utah have enacted DMF Statutes that also require such comparisons, but exempt life insurance companies, like the Life Companies, that have not previously utilized a Death Master File, and instead only require that such companies conduct Death Master File comparisons for life insurance policies issued and delivered in each of those states after the DMF Statute’s effective date. Likewise, Alabama, Arkansas, Georgia, Indiana and Mississippi have enacted DMF 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
	Note 12 - Contingencies (continued)
	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 state courts challenging the application of such statutes to policies issued prior to the subject DMF 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 to 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 held that the Kentucky DMF Statute does apply to life insurance policies issued before the statute’s January 1, 2013 effective date. The subject Life Companies appealed this 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 laws. Therefore, the Court ruled, the Kentucky DMF Statute can only apply to policies issued on or after January 1, 2013. In September 2014, the Kentucky Department of Insurance asked 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, consistent with what the Life Companies believe are the requirements of Maryland’s common law presumption against retroactive application of new laws, the Maryland Constitution and the Contract Clause of the United States Constitution. The Maryland Insurance Administration filed a motion to dismiss, 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 appealed the trial court’s ruling. The Maryland appellate courts 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 pursue their appeal. The Life Companies’ appeal was heard by the Maryland Court of Special Appeals in December 2014, and the parties expect the court to render a decision by the fourth 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, consistent with what the Life Companies believe are the requirements of Indiana’s common law presumption against retroactive application of new laws, the Indiana Constitution and the Contract Clause of the United States Constitution. On May 6, 2015, legislation was enacted amending the Indiana DMF Statute so that it applies only prospectively. In light of this development, the subject Life Companies intend to dismiss their declaratory judgment action.
	Unclaimed property compliance audits/litigation. A second type of initiative involves an unclaimed property compliance audit of the Life Companies (the “Treasurers’ Audit”) being conducted by a private audit firm retained by the treasurers/controllers of 38 states (the “Audit Firm”) and related litigation. 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 has been continued until the California Court of Appeal rules on a preliminary injunction order issued in a similar case involving an unaffiliated life insurance company, entitled Chiang v. American National Insurance Company (the “ANICO Appeal”). In July 2014, the court granted a motion by the CA Controller to stay the litigation against the Life Companies in its entirety, including 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. In March, 2015, the California Court of Appeal reversed the order granting the preliminary injunction to the CA Controller in the ANICO case. The CA Controller has indicated that it will not appeal this decision, and, accordingly, the stay of the litigation has been lifted and activity has resumed. Pending the outcome of this litigation, the Life Companies have not produced their in-force policy records to the CA Controller.
	Examinations/enforcement actions by regulators. A third type of initiative involves examinations and other actions by state insurance regulators. The Life Companies are the subject of a multi-state market conduct examination by five state insurance
	Note 12 - Contingencies (continued)
	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 originated in June 2012 as a single-state examination by the Illinois Department of Insurance. Insurance regulators from five additional states - California, Florida, New Hampshire North Dakota and Pennsylvania - 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 Life Companies had already produced, including the 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 litigation. This request prompted the Illinois litigation noted below. The Multi-State Exam remains ongoing.
	Pending related litigation. 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 is scheduled in May 2015.
	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 a Death Master File 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 remaining counts, and in October 2014, the Life Companies filed a motion for summary judgment with respect to those counts. The IDOI filed a cross motion for summary judgment in December 2014. The parties are engaged in discovery and a briefing schedule and hearing date on the summary judgment motions are expected to be set at a May 2015 status conference. The actions against the insurance regulators in the states of Florida and Pennsylvania remain stayed by agreement of the parties pending the outcome of the Illinois action.
	Conclusion. The results of the aforementioned legislative actions, Treasurers’ Audit, Multi-State Exam and the related litigation cannot currently be predicted. The Life Companies continue to maintain that states lack the legal authority to establish new requirements that could have the effect of changing the terms of existing life insurance contracts with regard to basic claims handling obligations and processes. If state officials are able to impose such new requirements retroactively upon 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 result in changes in the law that could have the effect of altering the terms of the Life Companies’ existing life insurance contracts by imposing new requirements that 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. Any attempt to predict the ultimate outcomes (including any estimate of the resulting effect on claim liabilities and reserves for future policy benefits) of these various efforts to change the law would entail predicting on a state-by-state-basis the ultimate outcomes of numerous uncertainties including, but not limited to: how many states might eventually enact laws or interpret existing laws to require the use of a Death Master File or may exact such usage through regulation, examinations or audits; the matching criteria to be used in comparing records of the Life Companies against a Death Master File; the universe of policies affected; whether and to what extent any such laws would be applied retroactively; and the results of unclaimed property audits, examinations and other actions by state insurance regulators and litigation, including challenges to the constitutionality of laws purporting to have retroactive application. 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	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Parties	Note 13 - Related Parties
	Mr. Christopher B. Sarofim, a director of Kemper, is Vice Chairman and a member of the board of directors of Fayez Sarofim & Co. (“FS&C”), a registered investment advisory firm. Kemper’s subsidiary, Trinity, had $85.0 million in assets managed by FS&C at March 31, 2015 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 $0.1 million for each of the three month periods ended March 31, 2015 and 2014.
	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 $158.9 million in assets managed by FS&C at March 31, 2015 under an agreement with FS&C whereby FS&C provides investment management services. Investment expenses incurred in connection with such agreement were $0.1 million for each of the three month periods ended March 31, 2015 and 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.

Subsequent_Events_Subsequent_E

Subsequent Events Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Event [Line Items]
Subsequent Events [Text Block]	Note 14 - Subsequent Events - Acquisition of Alliance United Group
	On April 30, 2015, Kemper completed its acquisition of Alliance United Group and its wholly-owned subsidiaries, Alliance United Insurance Company and Alliance United Insurance Services (individually and collectively “Alliance United”), in a cash transaction for a total purchase price of $70.3 million, subject to certain post-closing adjustments. The Company has not yet allocated the purchase price to the fair value of the assets acquired and liabilities assumed. After completing the transaction, Kemper contributed $75.0 million to support the book of business acquired. The results of Alliance United will be included in the Condensed Consolidated Financial Statements from the date of acquisition and will be reported in the Company’s Property & Casualty Insurance segment.

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2015
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 March 31, 2015 by contractual maturity were:
	(Dollars in Millions)	Amortized Cost			Fair Value
	Due in One Year or Less	$	44.1		$	44.9
	Due after One Year to Five Years	741.1			795.5
	Due after Five Years to Ten Years	1,338.50			1,414.50
	Due after Ten Years	1,994.30			2,336.50
	Mortgage- and Asset-backed Securities Not Due at a Single Maturity Date	199.2			211.7
	Investments in Fixed Maturities	$	4,317.20		$	4,803.10
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 March 31, 2015 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	$	28.7		$	(0.2	)	$	25.5		$	(0.5	)	$	54.2	$	(0.7	)
	States and Political Subdivisions	54.1			(0.4		)	1			—			55.1		(0.4		)
	Corporate Securities:
	Bonds and Notes	221.1			(4.3		)	93.3			(2.7		)	314.4		(7.0		)
	Redeemable Preferred Stocks	1.7			—			—			—			1.7		—
	Collateralized Loan Obligations	20.4			(0.1		)	3.5			—			23.9		(0.1		)
	Other Mortgage- and Asset-backed	—			—			0.4			—			0.4		—
	Total Fixed Maturities	326			(5.0		)	123.7			(3.2		)	449.7		(8.2		)
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	7.2			(0.4		)	12.6			(0.4		)	19.8		(0.8		)
	Other Industries	6.5			(0.7		)	0.5			—			7		(0.7		)
	Common Stocks:
	Other Industries	2			(0.6		)	—			—			2		(0.6		)
	Other Equity Interests:
	Exchange Traded Funds	—			—			14.5			(0.6		)	14.5		(0.6		)
	Limited Liability Companies and Limited Partnerships	94.3			(2.2		)	12.6			(0.6		)	106.9		(2.8		)
	Total Equity Securities	110			(3.9		)	40.2			(1.6		)	150.2		(5.5		)
	Total	$	436		$	(8.9	)	$	163.9		$	(4.8	)	$	599.9	$	(13.7	)
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 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	$	24.9		$	(0.7	)	$	55.5		$	(1.3	)	$	80.4	$	(2.0	)
	States and Political Subdivisions	1			—			126.3			(1.8		)	127.3		(1.8		)
	Corporate Securities:
	Bonds and Notes	250.4			(5.1		)	360.5			(10.0		)	610.9		(15.1		)
	Collateralized Loan Obligations	51.2			(0.7		)	3.4			(0.1		)	54.6		(0.8		)
	Other Mortgage- and Asset-backed	—			—			0.4			—			0.4		—
	Total Fixed Maturities	327.5			(6.5		)	546.1			(13.2		)	873.6		(19.7		)
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	7.5			(0.1		)	12.1			(0.9		)	19.6		(1.0		)
	Other Industries	—			—			0.5			—			0.5		—
	Common Stocks:
	Manufacturing	15.1			(1.1		)	—			—			15.1		(1.1		)
	Other Industries	4.2			(0.4		)	1			—			5.2		(0.4		)
	Other Equity Interests:
	Exchange Traded Funds	14.9			(0.1		)	14.4			(0.6		)	29.3		(0.7		)
	Limited Liability Companies and Limited Partnerships	54.4			(1.5		)	6.6			(0.3		)	61		(1.8		)
	Total Equity Securities	96.1			(3.2		)	34.6			(1.8		)	130.7		(5.0		)
	Total	$	423.6		$	(9.7	)	$	580.7		$	(15.0	)	$	1,004.30	$	(24.7	)
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.
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Balance at Beginning of Period	$	5.3		$	9.9
	Increases to Previously Recognized OTTI Credit Losses	—			0.3
	Balance at End of Period	$	5.3		$	10.2
Schedule of Realized Gain (Loss) [Table Text Block]	Gross gains and losses on sales of investments in fixed maturities and equity securities for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Fixed Maturities:
	Gains on Sales	$	2		$	4.4
	Losses on Sales	(0.1		)	—
	Equity Securities:
	Gains on Sales	1.5			0.8
	Losses on Sales	—			—
Schedule of Other Investments [Table Text Block]	The carrying values of the Company’s Other Investments at March 31, 2015 and December 31, 2014 were:
	(Dollars in Millions)	Mar 31,			Dec 31,
		2015			2014
	Loans to Policyholders at Unpaid Principal	$	284.5		$	283.4
	Real Estate at Depreciated Cost	160.3			160.9
	Trading Securities at Fair Value	4.9			4.9
	Other	0.4			0.4
	Total	$	450.1		$	449.6
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 March 31, 2015 were:
		Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)	Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities	$	307		$	34		$	(0.7	)	$	340.3
	States and Political Subdivisions	1,355.90			134.7			(0.4		)	1,490.20
	Corporate Securities:
	Bonds and Notes	2,575.40			322.5			(7.0		)	2,890.90
	Redeemable Preferred Stocks	5.9			0.5			—			6.4
	Collateralized Loan Obligations	69.1			0.9			(0.1		)	69.9
	Other Mortgage- and Asset-backed	3.9			1.5			—			5.4
	Investments in Fixed Maturities	$	4,317.20		$	494.1		$	(8.2	)	$	4,803.10
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 were:
		Amortized			Gross Unrealized						Fair Value
	(Dollars in Millions)	Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities	$	315.2		$	32.3		$	(2.0	)	$	345.5
	States and Political Subdivisions	1,352.50			126.4			(1.8		)	1,477.10
	Corporate Securities:
	Bonds and Notes	2,599.30			294.3			(15.1		)	2,878.50
	Redeemable Preferred Stocks	5.9			0.8			—			6.7
	Collateralized Loan Obligations	64.9			0.3			(0.8		)	64.4
	Other Mortgage- and Asset-backed	3.9			1.5			—			5.4
	Investments in Fixed Maturities	$	4,341.70		$	455.6		$	(19.7	)	$	4,777.60
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 March 31, 2015 were:
					Gross Unrealized
	(Dollars in Millions)	Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate	$	85.5		$	5.8		$	(0.8	)	$	90.5
	Other Industries	16.3			3.6			(0.7		)	19.2
	Common Stocks:
	Manufacturing	41.2			15			—			56.2
	Other Industries	52.2			16.3			(0.6		)	67.9
	Other Equity Interests:
	Exchange Traded Funds	195.3			10.4			(0.6		)	205.1
	Limited Liability Companies and Limited Partnerships	165			27.5			(2.8		)	189.7
	Investments in Equity Securities	$	555.5		$	78.6		$	(5.5	)	$	628.6
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2014 were:
					Gross Unrealized
	(Dollars in Millions)	Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate	$	85.5		$	5.2		$	(1.0	)	$	89.7
	Other Industries	16.3			3.5			—			19.8
	Common Stocks:
	Manufacturing	43.4			14.9			(1.1		)	57.2
	Other Industries	60.8			16.2			(0.4		)	76.6
	Other Equity Interests:
	Exchange Traded Funds	195.2			8.2			(0.7		)	202.7
	Limited Liability Companies and Limited Partnerships	160.3			27.7			(1.8		)	186.2
	Investments in Equity Securities	$	561.5		$	75.7		$	(5.0	)	$	632.2

Property_and_Casualty_Insuranc1

Property and Casualty Insurance Reserves (Tables)	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	733.9		$	843.5
	Less Reinsurance Recoverables at Beginning of Year	54.9			63.4
	Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	679			780.1
	Incurred Losses and LAE Related to:
	Current Year:
	Continuing Operations	214.2			253
	Prior Years:
	Continuing Operations	(7.4		)	(15.2		)
	Discontinued Operations	—			0.2
	Total Incurred Losses and LAE Related to Prior Years	(7.4		)	(15.0		)
	Total Incurred Losses and LAE	206.8			238
	Paid Losses and LAE Related to:
	Current Year:
	Continuing Operations	91.1			108.4
	Prior Years:
	Continuing Operations	126			140.1
	Discontinued Operations	1.8			2.2
	Total Paid Losses and LAE Related to Prior Years	127.8			142.3
	Total Paid Losses and LAE	218.9			250.7
	Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	666.9			767.4
	Plus Reinsurance Recoverables at End of Period	53.2			62.2
	Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	$	720.1		$	829.6

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The amortized cost of debt outstanding at March 31, 2015 and December 31, 2014 was:
	(Dollars in Millions)	Mar 31,			Dec 31,
		2015			2014
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	—		$	249.5
	6.00% Senior Notes due May 15, 2017	358.6			358.5
	4.35% Senior Notes due February 15, 2025	247.3			—
	7.375% Subordinated Debentures due February 27, 2054	144.1			144.1
	Total Debt Outstanding	$	750		$	752.1
Schedule of Interest Expense [Table Text Block]	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Notes Payable under Revolving Credit Agreement	$	0.2		$	0.2
	Federal Home Loan Bank of Dallas	—			—
	Federal Home Loan Bank of Chicago	—			—
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	3.7			3.9
	6.00% Senior Notes due May 15, 2017	5.6			5.5
	4.35% Senior Notes due February 15, 2025	1.1			—
	7.375% Subordinated Debentures due February 27, 2054	2.8			1
	Interest Expense before Capitalization of Interest	13.4			10.6
	Capitalization of Interest	(0.2		)	(0.3		)
	Total Interest Expense	$	13.2		$	10.3
Schedule of Interest Paid [Table Text Block]	Interest paid, including facility fees, for the three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Notes Payable under Revolving Credit Agreement	$	0.2		$	0.2
	Federal Home Loan Bank of Dallas	—			—
	Federal Home Loan Bank of Chicago	—			—
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	4.8			—
	6.00% Senior Notes due May 15, 2017	—			—
	4.35% Senior Notes due February 15, 2025	—			—
	7.375% Subordinated Debentures due February 27, 2054	2.8			—
	Total Interest Paid	$	7.8		$	0.2

Longterm_Equitybased_Compensat1

Long-term Equity-based Compensation Plans (Tables)	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 were as follows:
		Three Months Ended
		Mar 31, 2015					Mar 31, 2014
	Range of Valuation Assumptions
	Expected Volatility	22.49	%	-	41.65	%	25.76	%	-	44.43	%
	Risk-free Interest Rate	1.08		-	1.63		1.07		-	2.14
	Expected Dividend Yield	2.62		-	2.62		2.6		-	2.6
	Weighted-Average Expected Life in Years
	Employee Grants	4		-	7		4		-	7
	Director Grants	5.5					NA
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	Tandem Award activity for the three months ended March 31, 2015 is presented below.
		Shares Subject			Weighted-			Weighted-		Aggregate
		to Awards			average			average		Intrinsic Value
					Exercise Price			Remaining		($ in Millions)
					Per Share ($)			Contractual Life
								(in Years)
	Outstanding at Beginning of the Year	2,265,711			$	39.74
	Granted	265,750			36.17
	Exercised	(239,250	)		28.16
	Forfeited or Expired	(427,024	)		46.23
	Outstanding at March 31, 2015	1,865,187			$	39.23		5.08		$	5.5
	Vested and Expected to Vest at March 31, 2015	1,821,284			$	39.34		5		$	5.3
	Exercisable at March 31, 2015	1,295,183			$	40.96		3.38		$	3.4
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 March 31, 2015 is presented below.
								Outstanding						Exercisable
	Range of Exercise Prices Per Share ($)							Shares			Weighted-		Weighted-	Shares	Weighted-
								Subject to Awards			average		average	Subject to Tandem	average
											Exercise Price		Remaining	Awards	Exercise Price
											Per Share ($)		Contractual		Per Share ($)
													Life (in Years)
	$	15.01		-	$	20		8,000			$	16.48	4.1	8,000	$	16.48
	20.01			-	25			21,500			23.26		4.81	21,500	23.26
	25.01			-	30			187,125			29.12		6.43	141,123	28.97
	30.01			-	35			210,000			33.13		7.83	118,000	32.89
	35.01			-	40			821,125			36.67		7.02	389,123	37.1
	40.01			-	45			—			—		—	—	—
	45.01			-	50			616,045			48.61		1.21	616,045	48.61
	50.01			-	55			1,392			50.04		0.1	1,392	50.04
	15.01			-	55			1,865,187			39.23		5.09	1,295,183	40.96
Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan, Activity [Table Text Block]	Activity related to DSU awards for the three months ended March 31, 2015 was as follows:
		Number of DSUs			Weighted-
					Average
					Grant-Date
					Fair Value
					Per DSU
	Vested Balance at Beginning of the Year	8,000			$	34.52
	Granted and Vested	—			—
	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 three months ended March 31, 2015 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	53,095			$	32.42		30,024			$	36.6
	Granted	—			—			47,375			36.17
	Vested	—			—			—			—
	Forfeited	(3,651	)		29.18			(800	)		36.4
	Nonvested Balance at End of Period	49,444			32.66			76,599			36.34
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 three months ended March 31, 2015 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	110,625			$	39.28		61,875			$	40.5
	Granted	—			—			68,825			43.05
	Vested	—			—			—			—
	Forfeited	(59,225	)		36.81			(1,800	)		41.49
	Nonvested Balance at End of Period	51,400			42.12			128,900			41.85

Income_from_Continuing_Operati1

Income from Continuing Operations Per Unrestricted Share (Tables)	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 is as follows:
		Three Months Ended
		Mar 31,				Mar 31,
		2015				2014
	(Dollars in Millions)
	Income from Continuing Operations	$	13.5			$	35.2
	Less Income (Loss) from Continuing Operations Attributed to Participating Awards	(0.1		)		0.2
	Income from Continuing Operations Attributed to Unrestricted Shares	13.6				35
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—				—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	13.6			$	35
	(Number of Shares in Thousands)
	Weighted-average Unrestricted Shares Outstanding	51,872.80				55,312.90
	Equity-based Compensation Equivalent Shares	96.5				130.2
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	51,969.30				55,443.10
	(Per Unrestricted Share in Whole Dollars)
	Basic Income from Continuing Operations Per Unrestricted Share	$	0.26			$	0.63
	Diluted Income from Continuing Operations Per Unrestricted Share	$	0.26			$	0.63
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 three months ended March 31, 2015 and 2014 because the exercise prices for the options exceeded the average market price is presented below.
		Three Months Ended
	(Number of Shares in Thousands)	Mar 31,			Mar 31,
		2015			2014
	Equity-based Compensation Equivalent Shares	1,244.10			1,250.10
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,244.10			1,250.10

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Schedule of Comprehensive Income [Table Text Block]	The components of Other Comprehensive Income Before Income Taxes for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$	49.7		$	124.4
	Reclassification Adjustment for Amounts Included in Net Income	3.6			(4.4		)
	Unrealized Holding Gains (Losses)	53.3			120
	Foreign Currency Translation Adjustments	(0.9		)	—
	Amortization of Net Unrecognized Postretirement Benefit Costs	5.4			2
	Other Comprehensive Income Before Income Taxes	$	57.8		$	122
	The components of Other Comprehensive Income Tax Expense for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Other Comprehensive Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	$	(17.5	)	$	(43.9	)
	Reclassification Adjustment for Amounts Included in Net Income	(1.3		)	1.5
	Unrealized Holding Gains and Losses	(18.8		)	(42.4		)
	Foreign Currency Translation Adjustment	0.3			—
	Amortization of Net Unrecognized Postretirement Benefit Costs	(1.7		)	(0.7		)
	Other Comprehensive Income Tax Expense	$	(20.2	)	$	(43.1	)
Schedule of Accumulated Other Comprehensive Income [Table Text Block]	The components of Accumulated Other Comprehensive Income (“AOCI”) at March 31, 2015 and December 31, 2014 were:
	(Dollars in Millions)	Mar 31,			Dec 31,
		2015			2014
	Net Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	2.1		$	2.8
	Other Net Unrealized Gains on Investments	360			324.8
	Foreign Currency Translation Adjustments, Net of Income Taxes	(0.4		)	0.2
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(101.4		)	(105.1		)
	Accumulated Other Comprehensive Income	$	260.3		$	222.7
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 three months ended March 31, 2015 and 2014:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Reclassification of AOCI from Net Unrealized Gains on Investments to:
	Net Realized Gains on Sales of Investments	$	3.4		$	5.2
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Total Before Income Taxes	(3.6		)	4.4
	Income Tax Benefit (Expense)	1.3			(1.5		)
	Reclassification from AOCI, Net of Income Taxes	(2.3		)	2.9
	Reclassification of AOCI from Amortization of Net Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(5.4		)	(2.0		)
	Income Tax Benefit	1.7			0.7
	Reclassification from AOCI, Net of Income Taxes	(3.7		)	(1.3		)
	Total Reclassification from AOCI to Net Income	$	(6.0	)	$	1.6

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Liabilities [Table Text Block]	The components of Liabilities for Income Taxes at March 31, 2015 and December 31, 2014 were:
	(Dollars in Millions)	Mar 31,		Dec 31,
		2015		2014
	Current Income Tax Liabilities	$	—	$	7.8
	Deferred Income Tax Liabilities	51.1		21.5
	Unrecognized Tax Benefits	7.1		7.2
	Liabilities for Income Taxes	$	58.2	$	36.5

Pension_Benefits_and_Postretir1

Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)	3 Months Ended
	Mar. 31, 2015
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 three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Service Cost Earned	$	2.6		$	2.2
	Interest Cost on Projected Benefit Obligation	6.4			6.2
	Expected Return on Plan Assets	(8.8		)	(8.7		)
	Amortization of Accumulated Net Unrecognized Pension Costs	5.8			2.3
	Total Pension Expense Recognized	$	6		$	2
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 three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Service Cost on Benefits Earned	$	—		$	0.1
	Interest Cost on Projected Benefit Obligation	0.3			0.3
	Amortization of Accumulated Net Unrecognized Gain	(0.4		)	(0.3		)
	Total Postretirement Benefits Other than Pensions Expense (Benefit)	$	(0.1	)	$	0.1

Business_Segments_Tables

Business Segments (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Segment Revenues, including a reconciliation to Total Revenues, for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	287.6		$	322.3
	Net Investment Income	14.8			17.6
	Other Income	0.3			0.1
	Total Property & Casualty Insurance	302.7			340
	Life & Health Insurance:
	Earned Premiums	143.7			155.3
	Net Investment Income	50.4			50.2
	Other Income	0.8			—
	Total Life & Health Insurance	194.9			205.5
	Total Segment Revenues	497.6			545.5
	Net Realized Gains on Sales of Investments	3.4			6.6
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Other	5.2			3.3
	Total Revenues	$	499.2		$	554.6
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 three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Segment Operating Profit:
	Property & Casualty Insurance	$	18		$	19.3
	Life & Health Insurance	24.8			34.6
	Total Segment Operating Profit	42.8			53.9
	Corporate and Other Operating Loss	(12.3		)	(7.8		)
	Total Operating Profit	30.5			46.1
	Net Realized Gains on Sales of Investments	3.4			6.6
	Net Impairment Losses Recognized in Earnings	(7.0		)	(0.8		)
	Loss from Early Extinguishment of Debt	(9.1		)	—
	Income from Continuing Operations before Income Taxes	$	17.8		$	51.9
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 three months ended March 31, 2015 and 2014 was:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Segment Net Operating Income :
	Property & Casualty Insurance	$	13.4		$	14.4
	Life & Health Insurance	16.1			22.1
	Total Segment Net Operating Income	29.5			36.5
	Corporate and Other Net Operating Loss	(7.7		)	(5.0		)
	Consolidated Net Operating Income	21.8			31.5
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	2.2			4.2
	Net Impairment Losses Recognized in Earnings	(4.6		)	(0.5		)
	Loss from Early Extinguishment of Debt	(5.9		)	—
	Income from Continuing Operations	$	13.5		$	35.2
Revenue from External Customers by Products and Services [Table Text Block]	Earned Premiums by product line for the three months ended March 31, 2015 and 2014 were:
		Three Months Ended
	(Dollars in Millions)	Mar 31,			Mar 31,
		2015			2014
	Personal Automobile	$	189.8		$	216.3
	Homeowners	72.6			79.7
	Other Personal Property and Casualty Insurance	30.6			32.1
	Commercial Automobile	13.5			13.1
	Life	88			97.6
	Accident and Health	36.8			38.8
	Total Earned Premiums	$	431.3		$	477.6

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
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 December 31, 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	$	129.2			$	216.3			$	—		$	345.5
	States and Political Subdivisions	—				1,477.10				—			1,477.10
	Corporate Securities:
	Bonds and Notes	—				2,517.90				360.6			2,878.50
	Redeemable Preferred Stocks	—				—				6.7			6.7
	Collateralized Loan Obligations	—				—				64.4			64.4
	Other Mortgage- and Asset-backed	—				1.5				3.9			5.4
	Total Investments in Fixed Maturities	129.2				4,212.80				435.6			4,777.60
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				84.7				5			89.7
	Other Industries	—				3.4				16.4			19.8
	Common Stocks:
	Manufacturing	50.9				5.7				0.6			57.2
	Other Industries	59				0.8				16.8			76.6
	Other Equity Interests:
	Exchange Traded Funds	202.7				—				—			202.7
	Limited Liability Companies and Limited Partnerships	—				—				186.2			186.2
	Total Investments in Equity Securities	312.6				94.6				225			632.2
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				53.3			53.3
	Other Investments:
	Trading Securities	4.9				—				—			4.9
	Total	$	446.7			$	4,307.40			$	713.9		$	5,468.00
	The valuation of assets measured at fair value in the Company’s Condensed Consolidated Balance Sheet at March 31, 2015 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	$	130.7			$	209.6			$	—		$	340.3
	States and Political Subdivisions	—				1,490.20				—			1,490.20
	Corporate Securities:
	Bonds and Notes	—				2,516.10				374.8			2,890.90
	Redeemable Preferred Stocks	—				—				6.4			6.4
	Collateralized Loan Obligations	—				—				69.9			69.9
	Other Mortgage- and Asset-backed	—				1.5				3.9			5.4
	Total Investments in Fixed Maturities	130.7				4,217.40				455			4,803.10
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				85.8				4.7			90.5
	Other Industries	—				7.1				12.1			19.2
	Common Stocks:
	Manufacturing	49.5				5.9				0.8			56.2
	Other Industries	51.5				0.8				15.6			67.9
	Other Equity Interests:
	Exchange Traded Funds	205.1				—				—			205.1
	Limited Liability Companies and Limited Partnerships	—				—				189.7			189.7
	Total Investments in Equity Securities	306.1				99.6				222.9			628.6
	Fair Value Option Investments:
	Limited Liability Companies and Limited Partnerships	—				—				54.2			54.2
	Other Investments:
	Trading Securities	4.9				—				—			4.9
	Total	$	441.7			$	4,317.00			$	732.1		$	5,490.80
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 March 31, 2015.
	(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted-average Yield
	Investment-grade	Market Yield		$	109			2.6	%	-	6.9	%	3.6	%
	Non-investment-grade:
	Senior Debt	Market Yield		93.3				3.6		-	14.5		9.9
	Junior Debt	Market Yield		159.4				8.2		-	21.5		13.4
	Collateralized Loan Obligations	Market Yield		69.9				2.5		-	7.7		4.9
	Other	Various		23.4
	Total Fixed Maturity Investments in Corporate Securities			$	455
	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, 2014.
	(Dollars in Millions)	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted-average Yield
	Investment-grade	Market Yield		$	107			2.8	%	-	6.9	%	3.9	%
	Non-investment-grade:
	Senior Debt	Market Yield		92.7				3.8		-	14.5		10.6
	Junior Debt	Market Yield		149.9				8.2		-	21		13.4
	Collateralized Loan Obligations	Market Yield		64.4				2.7		-	8.1		5.2
	Other Debt	Various		21.6
	Total Fixed Maturity Investments in Corporate Securities			$	435.6
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 three months ended March 31, 2015 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	$	360.6			$	6.7			$	64.4		$	3.9		$	38.8		$	186.2		$	53.3		$	713.9
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	(2.3		)		—				0.1			—			(0.8		)	(1.0		)	0.9			(3.1		)
	Included in Other Comprehensive Income	2.4				(0.3		)		1.3			—			(0.7		)	(1.2		)	—			1.5
	Purchases	36.2				—				4.1			—			0.4			11.2			—			51.9
	Settlements	(4.2		)		—				—			—			—			(9.6		)	—			(13.8		)
	Sales	(17.9		)		—				—			—			(0.7		)	—			—			(18.6		)
	Transfers into Level 3	—				—				—			—			—			4.1			—			4.1
	Transfers out of Level 3	—				—				—			—			(3.8		)	—			—			(3.8		)
	Balance at End of Period	$	374.8			$	6.4			$	69.9		$	3.9		$	33.2		$	189.7		$	54.2		$	732.1
	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 March 31, 2014 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	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	626.7
	Total Gains (Losses):
	Included in Condensed Consolidated Statement of Income	0.1				—				—			0.1			—			0.2			0.4
	Included in Other Comprehensive Income	2.5				0.2				0.3			—			3.4			6.9			13.3
	Purchases	48.3				—				—			—			2.6			12.3			63.2
	Settlements	(24.8		)		(0.1		)		—			(0.8		)	—			(5.3		)	(31.0		)
	Sales	(10.2		)		—				—			—			—			(0.7		)	(10.9		)
	Transfers out of Level 3	(0.6		)		—				—			—			—			—			(0.6		)
	Balance at End of Period	$	379.4			$	7.5			$	45		$	3.8		$	38.1		$	187.3		$	661.1

Investments_Schedule_of_Invest

Investments - Schedule of Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$4,317,200,000	$4,341,700,000
Available-for-sale Debt Securities, Fair Value	4,803,100,000	4,777,600,000
Available for sale Securities, Equity Securities, Cost	555,500,000	561,500,000
Available for sale Securities, Equity Securities, Fair Value	628,600,000	632,200,000
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Due in One Year or Less - Amortized Cost	44,100,000
Due in One Year or Less - Fair Value	44,900,000
Due after One Year to Five Years - Amortized Cost	741,100,000
Due after One Year to Five Years - Fair Value	795,500,000
Due after Five Years to Ten Years - Amortized Cost	1,338,500,000
Due after Five Years to Ten Years - Fair Value	1,414,500,000
Due after Ten Years - Amortized Cost	1,994,300,000
Due after Ten Years - Fair Value	2,336,500,000
Asset-backed Securities Not Due in a Single Maturity Date - Amortized Cost	199,200,000
Asset-backed Securities Not Due in a Single Maturity Date - Fair Value	211,700,000
Other Receivables	197,000,000	187,000,000
Other Liabilities	417,300,000	409,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	436,000,000	423,600,000
Less Than 12 Months, Unrealized Losses	-8,900,000	-9,700,000
12 Months or Longer, Fair Value	163,900,000	580,700,000
12 Months or Longer, Unrealized Losses	-4,800,000	-15,000,000
Total, Fair Value	599,900,000	1,004,300,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-13,700,000	-24,700,000
Less Than 12 Months, Fair Value	-100,000	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	0
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	4,317,200,000	4,341,700,000
Available-for-sale Debt Securities Gross Unrealized Gain	494,100,000	455,600,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-8,200,000	-19,700,000
Available-for-sale Debt Securities, Fair Value	4,803,100,000	4,777,600,000
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Other Receivables	0	0
Other Liabilities	6,100,000	0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	326,000,000	327,500,000
Less Than 12 Months, Unrealized Losses	-5,000,000	-6,500,000
12 Months or Longer, Fair Value	123,700,000	546,100,000
12 Months or Longer, Unrealized Losses	-3,200,000	-13,200,000
Total, Fair Value	449,700,000	873,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-8,200,000	-19,700,000
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	307,000,000	315,200,000
Available-for-sale Debt Securities Gross Unrealized Gain	34,000,000	32,300,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-700,000	-2,000,000
Available-for-sale Debt Securities, Fair Value	340,300,000	345,500,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	28,700,000	24,900,000
Less Than 12 Months, Unrealized Losses	-200,000	-700,000
12 Months or Longer, Fair Value	25,500,000	55,500,000
12 Months or Longer, Unrealized Losses	-500,000	-1,300,000
Total, Fair Value	54,200,000	80,400,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-700,000	-2,000,000
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	127,400,000
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	8,700,000
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	75,300,000
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,355,900,000	1,352,500,000
Available-for-sale Debt Securities Gross Unrealized Gain	134,700,000	126,400,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-400,000	-1,800,000
Available-for-sale Debt Securities, Fair Value	1,490,200,000	1,477,100,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	54,100,000	1,000,000
Less Than 12 Months, Unrealized Losses	-400,000	0
12 Months or Longer, Fair Value	1,000,000	126,300,000
12 Months or Longer, Unrealized Losses	0	-1,800,000
Total, Fair Value	55,100,000	127,300,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-400,000	-1,800,000
Bonds and Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	2,575,400,000	2,599,300,000
Available-for-sale Debt Securities Gross Unrealized Gain	322,500,000	294,300,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-7,000,000	-15,100,000
Available-for-sale Debt Securities, Fair Value	2,890,900,000	2,878,500,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	221,100,000	250,400,000
Less Than 12 Months, Unrealized Losses	-4,300,000	-5,100,000
12 Months or Longer, Fair Value	93,300,000	360,500,000
12 Months or Longer, Unrealized Losses	-2,700,000	-10,000,000
Total, Fair Value	314,400,000	610,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-7,000,000	-15,100,000
Redeemable Preferred Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	5,900,000	5,900,000
Available-for-sale Debt Securities Gross Unrealized Gain	500,000	800,000
Available-for-sale Debt Securities, Gross Unrealized Loss	0	0
Available-for-sale Debt Securities, Fair Value	6,400,000	6,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	1,700,000
Less Than 12 Months, Unrealized Losses	0
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Losses	0
Total, Fair Value	1,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	0
Collateralized Loan Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	69,100,000	64,900,000
Available-for-sale Debt Securities Gross Unrealized Gain	900,000	300,000
Available-for-sale Debt Securities, Gross Unrealized Loss	-100,000	-800,000
Available-for-sale Debt Securities, Fair Value	69,900,000	64,400,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	20,400,000	51,200,000
Less Than 12 Months, Unrealized Losses	-100,000	-700,000
12 Months or Longer, Fair Value	3,500,000	3,400,000
12 Months or Longer, Unrealized Losses	0	-100,000
Total, Fair Value	23,900,000	54,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-100,000	-800,000
Mortgage and Asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	3,900,000	3,900,000
Available-for-sale Debt Securities Gross Unrealized Gain	1,500,000	1,500,000
Available-for-sale Debt Securities, Gross Unrealized Loss	0	0
Available-for-sale Debt Securities, Fair Value	5,400,000	5,400,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	0	0
Less Than 12 Months, Unrealized Losses	0	0
12 Months or Longer, Fair Value	400,000	400,000
12 Months or Longer, Unrealized Losses	0	0
Total, Fair Value	400,000	400,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	0	0
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale Securities, Equity Securities, Cost	555,500,000	561,500,000
Available-for-sale Equity Securities, Gross Unrealized Gain	78,600,000	75,700,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-5,500,000	-5,000,000
Available for sale Securities, Equity Securities, Fair Value	628,600,000	632,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	110,000,000	96,100,000
Less Than 12 Months, Unrealized Losses	-3,900,000	-3,200,000
12 Months or Longer, Fair Value	40,200,000	34,600,000
12 Months or Longer, Unrealized Losses	-1,600,000	-1,800,000
Total, Fair Value	150,200,000	130,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-5,500,000	-5,000,000
Exchange Traded Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale Securities, Equity Securities, Cost	195,300,000	195,200,000
Available-for-sale Equity Securities, Gross Unrealized Gain	10,400,000	8,200,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-600,000	-700,000
Available for sale Securities, Equity Securities, Fair Value	205,100,000	202,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	0	14,900,000
Less Than 12 Months, Unrealized Losses	0	-100,000
12 Months or Longer, Fair Value	14,500,000	14,400,000
12 Months or Longer, Unrealized Losses	-600,000	-600,000
Total, Fair Value	14,500,000	29,300,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-600,000	-700,000
Limited Liability Companies and Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale Securities, Equity Securities, Cost	165,000,000	160,300,000
Available-for-sale Equity Securities, Gross Unrealized Gain	27,500,000	27,700,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-2,800,000	-1,800,000
Available for sale Securities, Equity Securities, Fair Value	189,700,000	186,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	94,300,000	54,400,000
Less Than 12 Months, Unrealized Losses	-2,200,000	-1,500,000
12 Months or Longer, Fair Value	12,600,000	6,600,000
12 Months or Longer, Unrealized Losses	-600,000	-300,000
Total, Fair Value	106,900,000	61,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-2,800,000	-1,800,000
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	-3,500,000	-14,100,000
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	-4,700,000	-5,600,000
Percentage of Unrealized Loss Postion to Amortized Cost Basis of Available for Sale Security Average	4.00%	4.00%
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	85,500,000
Available-for-sale Equity Securities, Gross Unrealized Gain	5,800,000	5,200,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-800,000	-1,000,000
Available for sale Securities, Equity Securities, Fair Value	90,500,000	89,700,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	7,200,000	7,500,000
Less Than 12 Months, Unrealized Losses	-400,000	-100,000
12 Months or Longer, Fair Value	12,600,000	12,100,000
12 Months or Longer, Unrealized Losses	-400,000	-900,000
Total, Fair Value	19,800,000	19,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-800,000	-1,000,000
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	16,300,000	16,300,000
Available-for-sale Equity Securities, Gross Unrealized Gain	3,600,000	3,500,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-700,000	0
Available for sale Securities, Equity Securities, Fair Value	19,200,000	19,800,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	6,500,000	0
Less Than 12 Months, Unrealized Losses	-700,000	0
12 Months or Longer, Fair Value	500,000	500,000
12 Months or Longer, Unrealized Losses	0	0
Total, Fair Value	7,000,000	500,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	-700,000	0
2000 to 3999 Manufacturing [Member] | Common Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale Securities, Equity Securities, Cost	41,200,000	43,400,000
Available-for-sale Equity Securities, Gross Unrealized Gain	15,000,000	14,900,000
Available-for-sale Equity Securities, Gross Unrealized Loss	0	-1,100,000
Available for sale Securities, Equity Securities, Fair Value	56,200,000	57,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value		15,100,000
Less Than 12 Months, Unrealized Losses		-1,100,000
12 Months or Longer, Fair Value		0
12 Months or Longer, Unrealized Losses		0
Total, Fair Value		15,100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments		-1,100,000
All Industries Other than Manufacturing [Member] | Common Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale Securities, Equity Securities, Cost	52,200,000	60,800,000
Available-for-sale Equity Securities, Gross Unrealized Gain	16,300,000	16,200,000
Available-for-sale Equity Securities, Gross Unrealized Loss	-600,000	-400,000
Available for sale Securities, Equity Securities, Fair Value	67,900,000	76,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	2,000,000	4,200,000
Less Than 12 Months, Unrealized Losses	-600,000	-400,000
12 Months or Longer, Fair Value	0	1,000,000
12 Months or Longer, Unrealized Losses	0	0
Total, Fair Value	2,000,000	5,200,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated in Investments	($600,000)	($400,000)

Investments_Schedule_of_Other_

Investments - Schedule of Other Than Temporary Impairment (Details) (Fixed Maturities [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fixed Maturities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at Beginning of Period	$5.30	$9.90
Increases to Previously Recognized OTTI Credit Losses	0	0.3
Balance at End of Period	$5.30	$10.20

Investments_Investments_Net_Re

Investments Investments - Net Realized Gains on Sales of Investments (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fixed Maturities [Member]
Net Investment Income [Line Items]
Gains on Sales	$2	$4.40
Losses on Sales	-0.1	0
Equity Securities [Member]
Net Investment Income [Line Items]
Gains on Sales	1.5	0.8
Losses on Sales	$0	$0

Investments_Investments_Schedu

Investments Investments - Schedule of Other Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Investments Disclosures [Abstract]
Loans to Policyholders at Unpaid Principal	$284.50	$283.40
Real Estate at Depreciated Cost	160.3	160.9
Trading Securities, Fair Value Disclosure	4.9	4.9
Other	0.4	0.4
Total	$450.10	$449.60

Investments_Investments_Equity

Investments Investments - Equity Method Limited Liability Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Investments - Equity Method Investments and Joint Ventures [Abstract]
Equity Method Limited Liability Investments, Maximum Exposure to Loss	$168.10	$184.80
Outstanding Commitments to Fund Equity Method Limited Liability Investments	$40.30

Property_and_Casualty_Insuranc2

Property and Casualty Insurance Reserves (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Property and Casulty Insurance Reserve - Gross of Reinsurance at Beginning of Year	$733.90	$843.50
Less Reinsurance Recoverables at Beginning of Year	54.9	63.4
Property and Casualty Insurance Reserves - Net of Reinsurance at Beginning of Year	679	780.1
Incurred Losses and LAE Related to Prior Years	-7.4	-15
Total Incurred Losses and LAE	206.8	238
Paid Losses and LAE Related to Prior Years	127.8	142.3
Total Paid Losses and LAE	218.9	250.7
Property and Casualty Insurance Reserves - Net of Reinsurance at End of Period	666.9	767.4
Plus Reinsurance Recoverables at End of Period	53.2	62.2
Property and Casualty Insurance Reserves - Gross of Reinsurance at End of Period	720.1	829.6
Continuing Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Current Year	214.2	253
Incurred Losses and LAE Related to Prior Years	7.4	15.2
Paid Losses and LAE Related to Current Year	91.1	108.4
Paid Losses and LAE Related to Prior Years	126	140.1
Discontinued Operations [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Incurred Losses and LAE Related to Prior Years	0	-0.2
Paid Losses and LAE Related to Prior Years	1.8	2.2
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	7.2	-14.7
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	0.2	-0.3
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		-0.5
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		0.2
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	-5.1	-11.5
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	2.6	2.8
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	($0.50)	($0.40)

Debt_Details

Debt (Details) (USD $)	0 Months Ended	3 Months Ended
	Feb. 24, 2015	Mar. 31, 2015	Mar. 31, 2014	Feb. 24, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Notes Payable		$750,000,000			$752,100,000
Loss on Early Redemption of Debt		-9,100,000	0
Interest Expense before Capitalization of Interest		13,400,000	10,600,000
Capitalization of Interest		-200,000	-300,000
Interest Expense		13,200,000	10,300,000
Interest Paid		7,800,000	200,000
Senior Notes [Member] | Senior Notes, 6 Percent Due November 30, 2015 [Member]
Debt Instrument [Line Items]
Notes Payable		0			249,500,000
Debt Instrument, Face Amount	250,000,000			250,000,000
Notes Payable, Interest Rate, Stated Percentage		6.00%
Interest Expense before Capitalization of Interest		3,700,000	3,900,000
Interest Paid		4,800,000	0
Senior Notes [Member] | Senior Notes, 6 Percent Due May 15, 2017 [Member]
Debt Instrument [Line Items]
Notes Payable		358,600,000			358,500,000
Notes Payable, Interest Rate, Stated Percentage		6.00%
Interest Expense before Capitalization of Interest		5,600,000	5,500,000
Interest Paid		0	0
Senior Notes [Member] | Senior Notes, 4.35 Percent Due February 15, 2025 [Member]
Debt Instrument [Line Items]
Notes Payable		247,300,000			0
Debt Instrument, Face Amount	250,000,000			250,000,000
Notes Payable, Interest Rate, Stated Percentage	4.35%	4.35%		4.35%
Proceeds from Debt, Net of Issuance Costs	247,300,000
Debt Instrument, Interest Rate, Effective Percentage	4.49%			4.49%
Interest Expense before Capitalization of Interest		1,100,000	0
Interest Paid		0	0
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Debt Instrument [Line Items]
Notes Payable		144,100,000			144,100,000
Notes Payable, Interest Rate, Stated Percentage		7.38%
Interest Expense before Capitalization of Interest		2,800,000	1,000,000
Interest Paid		2,800,000	0
Notes Payable under Revolving Credit Agreement [Member] | 2016 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding		0			0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Expense before Capitalization of Interest		200,000	200,000
Interest Paid		200,000	200,000
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
Federal Home Loan Bank of Dallas [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances		20,500,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances		0			0
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties		20,500,000
Interest Expense before Capitalization of Interest		0	0
Interest Paid		0	0
Federal Home Loan Bank of Chicago [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances		0			0
Interest Expense before Capitalization of Interest		0	0
Interest Paid		$0	$0

Longterm_Equitybased_Compensat2

Long-term Equity-based Compensation Plans Omnibus Plan (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Available for Grant under Omnibus Plan	7,834,964
Equity-based Compensation Expense	$2.20	$2.60
Unamortized Compensation Expense Related to Nonvested Awards	$8.20
Unamortized Compensation Expense Related to Nonvested Awards, Period for Recognition	2 years 1 month 6 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	540,900

Longterm_Equitybased_Compensat3

Long-term Equity-based Compensation Plans Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) (Stock Options [Member])	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Volatility Rate, Minimum	22.49%	25.76%
Fair Value Assumptions, Expected Volatility Rate, Maximum	41.65%	44.43%
Fair Value Assumptions, Risk Free Interest Rate, Minimum	1.08%	1.07%
Fair Value Assumptions, Risk Free Interest Rate, Maximum	1.63%	2.14%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Dividend Yield	2.62%	2.60%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Assumptions, Expected Dividend Yield	2.62%	2.60%
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	5 years 6 months	0 years

Longterm_Equitybased_Compensat4

Long-term Equity-based Compensation Plans Disclosure of Share-based Compensation Arrangements by Share-based Payment Awards (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options and Stock Appreciation Rights, Outstanding at Beginning of the Year, Number	2,265,711
Options and Stock Appreciation Rights, Outstanding at Beginning of the Year, Weighted Average Exercise Price	$39.74
Options and Stock Appreciation Rights, Grants in Period, Gross	265,750
Options and Stock Appreciation Rights, Grants in Period, Weighted Average Exercise Price	$36.17
Options and Stock Appreciation Rights, Exercises in Period	-239,250
Options and Stock Appreciation Rights, Exercises in Period, Weighted Average Exercise Price	$28.16
Options and Stock Appreciation Rights, Forfeitures and Expirations in Period	-427,024
Options and Stock Appreciation Rights, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$46.23
Options and Stock Appreciation Rights, Outstanding at End of the Year, Number	1,865,187
Options and Stock Appreciation Rights, Outstanding at End of the Year, Weighted Average Exercise Price	$39.23
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	5 years 0 months 29 days
Options and Stock Appreciation Rights, Outstanding at End of Period, Aggregate Intrinsic Value	$5.50
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Number	1,821,284
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Weighted Average Exercise Price	$39.34
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Weighted Average Remaining Contractual Term	5 years
Options and Stock Appreciation Rights, Vested and Expected to Vest, Outstanding at End of Period, Aggregate Intrinsic Value	5.3
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Number	1,295,183
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Weighted Average Exercise Price	$40.96
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Weighted Average Remaining Contractual Term	3 years 4 months 17 days
Options and Stock Appreciation Rights, Vested and Expected to Vest, Exercisable at End of Period, Aggregate Intrinsic Value	3.4
Options, Grants in Period, Weighted Average Grant Date Fair Value	$8.06	$10.18
Options, Exercises in Period, Total Intrinsic Value	2.3	0.3
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	0.8	0.1
Proceeds from Stock Options Exercised	$1.60	$0

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 $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
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	1,865,187	2,265,711
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$39.23	$39.74
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	5 years 0 months 29 days
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 1 month 7 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	21,500
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$23.26
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	4 years 9 months 22 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	21,500
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$23.26
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	187,125
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$29.12
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	6 years 5 months 5 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	141,123
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$28.97
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	210,000
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$33.13
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	7 years 9 months 29 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	118,000
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$32.89
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	821,125
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$36.67
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	7 years 0 months 7 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	389,123
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$37.10
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	0
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$0
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	0 years
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	0
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$0
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	616,045
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$48.61
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	1 year 2 months 16 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	616,045
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$48.61
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	1,392
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$50.04
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	0 years 1 month 6 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	1,392
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$50.04
Range of Exercise Prices $15.01 - $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	$15.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$55
Options and Stock Appreciation Rights, Outstanding at End of Period, Number	1,865,187
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Exercise Price	$39.23
Options and Stock Appreciation Rights, Outstanding at End of Period, Weighted Average Remaining Contractual Term	5 years 1 month 2 days
Options and Stock Appreciation Rights, Exercisable at End of Period, Number	1,295,183
Options and Stock Appreciation Rights, Exercisable at End of Period, Weighted Average Exercise Price	$40.96

Longterm_Equitybased_Compensat6

Long-term Equity-based Compensation Plans Schedule of Nonvested Restricted Stock Units Activity (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from Stock Options Exercised	$1.60	$0
Time Vested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock, Nonvested at Beginning of Year, Number	53,095
Restricted Stock, Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value	$32.42
Restricted Stock, Grants in Period	0
Restricted Stock, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Vested in Period	0
Restricted Stock, Vested in Period, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Forfeited in Period	-3,651
Restricted Stock, Forfeitures, Weighted Average Grant Date Fair Value	$29.18
Restricted Stock, Nonvested at End of Period, Number	49,444
Restricted Stock, Nonvested at End of Period, Weighted Average Grant Date Fair Value	$32.66
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock, Nonvested at Beginning of Year, Number	110,625
Restricted Stock, Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value	$39.28
Restricted Stock, Grants in Period	0
Restricted Stock, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Vested in Period	0
Restricted Stock, Vested in Period, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Forfeited in Period	-59,225
Restricted Stock, Forfeitures, Weighted Average Grant Date Fair Value	$36.81
Restricted Stock, Nonvested at End of Period, Number	51,400
Restricted Stock, Nonvested at End of Period, Weighted Average Grant Date Fair Value	$42.12
Performance Period	3 years
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock, Nonvested at Beginning of Year, Number	61,875
Restricted Stock, Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value	$40.50
Restricted Stock, Grants in Period	68,825
Restricted Stock, Weighted Average Grant Date Fair Value	$43.05
Restricted Stock, Vested in Period	0
Restricted Stock, Vested in Period, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Forfeited in Period	-1,800
Restricted Stock, Forfeitures, Weighted Average Grant Date Fair Value	$41.49
Restricted Stock, Nonvested at End of Period, Number	128,900
Restricted Stock, Nonvested at End of Period, Weighted Average Grant Date Fair Value	$41.85
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock, Vested in Period, Total Fair Value		2.4
Restricted Stock, Vested in Period, Tax Benefits		$0.80
Time Vested Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock, Nonvested at Beginning of Year, Number	30,024
Restricted Stock, Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value	$36.60
Restricted Stock, Grants in Period	47,375
Restricted Stock, Weighted Average Grant Date Fair Value	$36.17
Restricted Stock, Vested in Period	0
Restricted Stock, Vested in Period, Weighted Average Grant Date Fair Value	$0
Restricted Stock, Forfeited in Period	-800
Restricted Stock, Forfeitures, Weighted Average Grant Date Fair Value	$36.40
Restricted Stock, Nonvested at End of Period, Number	76,599
Restricted Stock, Nonvested at End of Period, Weighted Average Grant Date Fair Value	$36.34
Performance Period, 2014 to 2016 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded	68,125
Performance Period, 2013 to 2015 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded	60,775
Performance Period, 2012 to 2014 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Additional Shares To Be Granted If Maximum Perfornance Level Is Met or Exceeded	51,400
Performance Period, 2012 to 2014 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	57,775

Longterm_Equitybased_Compensat7

Long-term Equity-based Compensation Plans Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan, Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
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	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Weighted Average Exercise Price, Beginning of Year	$34.52
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Granted and Vested in Period	0
Share-based Compensation Arrangements by Share-based Payment Award, Deferred Stock Units, Granted and Vested in Period, Weighted Average Exercise Price	$0
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
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations	$13.50	$35.20
Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	0	0
Diluted Income from Continuning Operations Attributed to Unrestricted Shares	13.6	35
Weighted-Average Unrestricted Shares Outstanding	51,872,800	55,312,900
Equity-based Compensation Equivalent Shares	96,500	130,200
Weighted-Average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	51,969,300	55,443,100
Basic Income from Continuing Operations Per Unrestricted Share (in dollars per share)	$0.26	$0.63
Diluted Income from Continuing Operations Per Untrestriced Share (in dollars per share)	$0.26	$0.63
Unrestricted Shares [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations	13.6	35
Participating Awards [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations	($0.10)	$0.20

Income_from_Continuing_Operati3

Income from Continuing Operations Per Unrestricted Share - Antidilutive Securities (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,244,100	1,250,100
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,244,100	1,250,100

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$49.70	$124.40
Reclassification Adjustment for Amounts Included in Net Income	3.6	-4.4
Unrealized Holding Gains (Losses)	53.3	120
Foreign Currency Translation Adjustments	-0.9	0
Amortization of Net Unrecognized Postretirement Benefit Costs	-5.4	-2
Other Comprehensive Income Before Income Taxes	57.8	122
Other Comprehensive Income Tax Benefit (Expense):
Unrealized Holding Gains and Losses Arising During the Period Before Reclassification Adjustment	-17.5	-43.9
Reclassification Adjustment for Amounts Included in Net Income	-1.3	1.5
Unrealized Holding Gains and Losses	-18.8	-42.4
Foreign Currency Translation Adjustment	0.3	0
Amortization of Net Unrecognized Postretirement Benefit Costs	-1.7	-0.7
Other Comprehensive Income Tax Expense	$20.20	$43.10

Other_Comprehensive_Income_Los3

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Statement of Comprehensive Income [Abstract]
Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$2.10	$2.80
Other Net Unrealized Gains on Investments	360	324.8
Foreign Currency Translation Adjustments, Net of Income Taxes	-0.4	0.2
Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	-101.4	-105.1
Accumulated Other Comprehensive Income	$260.30	$222.70

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
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Realized Gains on Sales of Investments	$3.40	$6.60
Net Impairment Losses Recognized in Earnings	-7	-0.8
Total Before Income Taxes	17.8	51.9
Interest and Other Expenses	-29.7	-22.7
Income Tax Benefit (Expense)	-4.3	-16.7
Total Reclassification from AOCI to Net Income	13.5	35.1
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total Reclassification from AOCI to Net Income	-6	1.6
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	3.4	5.2
Net Impairment Losses Recognized in Earnings	-7	-0.8
Total Before Income Taxes	-3.6	4.4
Income Tax Benefit (Expense)	1.3	-1.5
Total Reclassification from AOCI to Net Income	-2.3	2.9
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	-5.4	-2
Income Tax Benefit (Expense)	1.7	0.7
Total Reclassification from AOCI to Net Income	($3.70)	($1.30)

Income_Taxes_Schedule_of_Curre

Income Taxes - Schedule of Current and Deferred Income Tax Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]
Current Income Tax Liabilities	$0	$7.80
Deferred Income Tax Liabilities	51.1	21.5
Unrecognized Tax Benefits	7.1	7.2
Liabilities for Income Taxes	$58.20	$36.50

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes Paid	$14.60	$6.40
Subsequent Event [Line Items]
Income Tax Expense (Benefit)	4.3	16.7
Subsequent Event [Member]
Subsequent Event [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions			3.5
Income Tax Expense (Benefit)			$2.30

Pension_Benefits_and_Postretir2

Pension Benefits and Postretirement Benefits Other Than Pensions (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$2.60	$2.20
Interest Cost on Projected Benefit Obligation	6.4	6.2
Expected Return on Plan Assets	-8.8	-8.7
Amortization of Accumulated Net Unrecognized Pension Costs	5.8	2.3
Total Expense Recognized	6	2
Postretirement Benefits Other than Pensions [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	0	0.1
Interest Cost on Projected Benefit Obligation	0.3	0.3
Amortization of Accumulated Net Unrecognized Pension Costs	-0.4	-0.3
Total Expense Recognized	($0.10)	$0.10

Business_Segments_Earned_Premi

Business Segments - Earned Premiums by Product Line (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Entity-Wide Information, Revenue from External Customer [Line Items]
Earned Premiums, Life	$88	$97.60
Earned Premiums, Accident and Health	36.8	38.8
Earned Premiums, Total	431.3	477.6
Personal Automobile [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Earned Premiums, Property and Casualty	189.8	216.3
Homeowners [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Earned Premiums, Property and Casualty	72.6	79.7
Other Personal Property and Casualty Insurance [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Earned Premiums, Property and Casualty	30.6	32.1
Commercial Automobile [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Earned Premiums, Property and Casualty	$13.50	$13.10

Business_Segments_Segment_Info

Business Segments - Segment Information (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	segments
Segment Reporting Information [Line Items]
Number of Operating Segments	2
Earned Premiums	$431.30	$477.60
Net Investment Income	70.6	71.1
Other Income	0.9	0.1
Total Revenues	499.2	554.6
Net Realized Gains on Sales of Investments	3.4	6.6
Segment Operating Profit (Loss)	30.5	46.1
Net Impairment Losses Recognized in Earnings	-7	-0.8
Loss from Early Extinguishment of Debt	9.1	0
Income from Continuing Operations before Income Taxes	17.8	51.9
Segment Net Operating Income (Loss)	21.8	31.5
Income from Continuing Operations	13.5	35.2
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Segment Operating Profit (Loss)	-12.3	-7.8
Segment Net Operating Income (Loss)	-7.7	-5
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Other Income	5.2	3.3
Net Realized Gains on Sales of Investments	3.4	6.6
Net Impairment Losses Recognized in Earnings	-7	-0.8
Loss from Early Extinguishment of Debt	-9.1	0
Net Realized Gains (Losses) on Sales of Investments, Net of Tax	2.2	4.2
Net Impairment Losses Recognized in Earnings, Net of Tax	-4.6	-0.5
Gains (Losses) on Extinguishment of Debt, Net of Taxes	-5.9	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues	497.6	545.5
Segment Operating Profit (Loss)	42.8	53.9
Segment Net Operating Income (Loss)	29.5	36.5
Operating Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Earned Premiums	287.6	322.3
Net Investment Income	14.8	17.6
Other Income	0.3	0.1
Total Revenues	302.7	340
Segment Operating Profit (Loss)	18	19.3
Segment Net Operating Income (Loss)	13.4	14.4
Operating Segments [Member] | Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Earned Premiums	143.7	155.3
Net Investment Income	50.4	50.2
Other Income	0.8	0
Total Revenues	194.9	205.5
Segment Operating Profit (Loss)	24.8	34.6
Segment Net Operating Income (Loss)	$16.10	$22.10

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Inputs (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
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	$54.20	$53.30
Trading Securities, Fair Value Disclosure	4.9	4.9
Fair Value, Inputs, Level 3 [Member] | Partnership Interest [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	113.2
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	54.2	53.3
Trading Securities, Fair Value Disclosure	4.9	4.9
Investments, Fair Value Disclosure	5,490.80	5,468
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	4,803.10	4,777.60
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	340.3	345.5
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	1,490.20	1,477.10
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	2,890.90	2,878.50
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	6.4	6.7
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	69.9	64.4
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	5.4	5.4
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	628.6	632.2
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	205.1	202.7
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	189.7	186.2
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	0
Trading Securities, Fair Value Disclosure	4.9	4.9
Investments, Fair Value Disclosure	441.7	446.7
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	130.7	129.2
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	130.7	129.2
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	306.1	312.6
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	205.1	202.7
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	0
Trading Securities, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	4,317	4,307.40
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	4,217.40	4,212.80
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	209.6	216.3
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	1,490.20	1,477.10
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	2,516.10	2,517.90
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	1.5	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	99.6	94.6
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	54.2	53.3
Trading Securities, Fair Value Disclosure	0	0
Investments, Fair Value Disclosure	732.1	713.9
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	455	435.6
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	374.8	360.6
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	6.4	6.7
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	69.9	64.4
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	3.9	3.9
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	222.9	225
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	189.7	186.2
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	90.5	89.7
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	85.8	84.7
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	4.7	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	19.2	19.8
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	7.1	3.4
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	12.1	16.4
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	56.2	57.2
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	49.5	50.9
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	5.9	5.7
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	0.8	0.6
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	67.9	76.6
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	51.5	59
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	0.8	0.8
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	$15.60	$16.80

Fair_Value_Measurements_Quanti

Fair Value Measurements - Quantitative Information for Level Three Inputs (Details) (Market Yield [Member], Fair Value, Inputs, Level 3 [Member], USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Collateralized Loan Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	69.9	64.4
Collateralized Loan Obligations [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	2.50%	2.70%
Collateralized Loan Obligations [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	7.70%	8.10%
Collateralized Loan Obligations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	4.90%	5.20%
Other Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	23.4	21.6
Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	455	435.6
External Credit Rating, Investment Grade [Member] | Private Placement [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	109	107
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	2.60%	2.80%
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	6.90%	6.90%
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	3.60%	3.90%
External Credit Rating, Non Investment Grade [Member] | Senior Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	93.3	92.7
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	3.60%	3.80%
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	14.50%	14.50%
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	9.90%	10.60%
External Credit Rating, Non Investment Grade [Member] | Junior Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	159.4	149.9
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	8.20%	8.20%
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	21.50%	21.00%
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	13.40%	13.40%

Fair_Value_Measurements_Level_

Fair Value Measurements - Level 3 Inputs Reconciliation (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	$713,900,000	$626,700,000
Included in Condensed Consolidated Statements of Operations	-3,100,000	400,000
Included in Other Comprehensive Income	1,500,000	13,300,000
Purchases	51,900,000	63,200,000
Settlements	-13,800,000	-31,000,000
Sales	-18,600,000	-10,900,000
Transfers into Level 3	4,100,000	0
Transfers out of Level 3	-3,800,000	-600,000
Balance at End of Period	732,100,000	661,100,000
Fair Value, Level 1 to level 2 Transfers, Amount	0	0
Fair Value, Level 2 to Level 1 Transfers, Amount	0	0
Fair Value, Level 1 to level 3 Transfers, Amount	0	0
Fair Value, Level 3 to level 1 Transfers, Amount	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	360,600,000	364,100,000
Included in Condensed Consolidated Statements of Operations	-2,300,000	100,000
Included in Other Comprehensive Income	2,400,000	2,500,000
Purchases	36,200,000	48,300,000
Settlements	-4,200,000	-24,800,000
Sales	-17,900,000	-10,200,000
Transfers into Level 3	0
Transfers out of Level 3	0	-600,000
Balance at End of Period	374,800,000	379,400,000
Redeemable Preferred Stocks [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	6,700,000	7,400,000
Included in Condensed Consolidated Statements of Operations	0	0
Included in Other Comprehensive Income	-300,000	200,000
Purchases	0	0
Settlements	0	-100,000
Sales	0	0
Transfers into Level 3	0
Transfers out of Level 3	0	0
Balance at End of Period	6,400,000	7,500,000
Collateralized Loan Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	64,400,000	44,700,000
Included in Condensed Consolidated Statements of Operations	100,000	0
Included in Other Comprehensive Income	1,300,000	300,000
Purchases	4,100,000	0
Settlements	0	0
Sales	0	0
Transfers into Level 3	0
Transfers out of Level 3	0	0
Balance at End of Period	69,900,000	45,000,000
Mortgage and Asset-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	3,900,000	4,500,000
Included in Condensed Consolidated Statements of Operations	0	100,000
Included in Other Comprehensive Income	0	0
Purchases	0	0
Settlements	0	-800,000
Sales	0	0
Transfers into Level 3	0
Transfers out of Level 3	0	0
Balance at End of Period	3,900,000	3,800,000
Preferred and Common Stocks [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	38,800,000	32,100,000
Included in Condensed Consolidated Statements of Operations	-800,000	0
Included in Other Comprehensive Income	-700,000	3,400,000
Purchases	400,000	2,600,000
Settlements	0	0
Sales	-700,000	0
Transfers into Level 3	0
Transfers out of Level 3	-3,800,000	0
Balance at End of Period	33,200,000	38,100,000
Other Equity Interests [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	186,200,000	173,900,000
Included in Condensed Consolidated Statements of Operations	-1,000,000	200,000
Included in Other Comprehensive Income	-1,200,000	6,900,000
Purchases	11,200,000	12,300,000
Settlements	-9,600,000	-5,300,000
Sales	0	-700,000
Transfers into Level 3	4,100,000
Transfers out of Level 3	0	0
Balance at End of Period	189,700,000	187,300,000
Fair Value Option Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Period	53,300,000
Included in Condensed Consolidated Statements of Operations	900,000
Included in Other Comprehensive Income	0
Purchases	0
Settlements	0
Sales	0
Transfers into Level 3	0
Transfers out of Level 3	0
Balance at End of Period	$54,200,000

Related_Parties_Details

Related Parties (Details) (FS&C [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Trinity [Member]
Related Party Transaction [Line Items]
Amount of assets being managed by FS&C	$85
Investment expenses	0.1	0.1
Pension Plans [Member] | Investment Management Services for Defined Benefit Plan [Member]
Related Party Transaction [Line Items]
Investment expenses	0.1	0.1
Assets under Management, Carrying Amount	$158.90

Subsequent_Events_Subsequent_E1

Subsequent Events Subsequent Events (Details) (Subsequent Event [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2015	7-May-15
Subsequent Event [Member]
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$70.30
Capital Contribution to Subsidiary		$75