Kemper (KMPR) 10-K 12 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 10, 2015	Jun. 30, 2014
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-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		51,874,886
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$1.95

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets:
Fixed Maturities at Fair Value (Amortized Cost: 2014 - $4,341.7; 2013 - $4,370.5)	$4,777.60	$4,575
Equity Securities at Fair Value (Cost: 2014 - $561.5; 2013 - $530.0)	632.2	598.5
Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings	184.8	245.1
Fair Value Option Investments	53.3	0
Short-term Investments at Cost which Approximates Fair Value	342.2	284.7
Other Investments	449.6	448
Total Investments	6,439.70	6,151.30
Cash	76.1	66.5
Receivables from Policyholders	295.3	331.6
Other Receivables	187	193.1
Deferred Policy Acquisition Costs	303.3	302.9
Goodwill	311.8	311.8
Deferred Income Tax Assets	0	31.8
Other Assets	220.2	267.4
Total Assets	7,833.40	7,656.40
Liabilities and Shareholders’ Equity:
Life and Health	3,273.70	3,217.50
Property and Casualty	733.9	843.5
Total Insurance Reserves	4,007.60	4,061
Unearned Premiums	536.9	598.9
Liabilities for Income Taxes	36.5	8.3
Debt at Amortized Cost (Fair Value: 2014 - $804.4; 2013 - $667.1)	752.1	606.9
Accrued Expenses and Other Liabilities	409.6	329.8
Total Liabilities	5,742.70	5,604.90
Shareholders’ Equity:
Common Stock, $0.10 Par Value Per Share, 100 Million Shares Authorized; 52,418,246 Shares Issued and Outstanding at December 31, 2014 and 55,653,437 Shares Issued and Outstanding at December 31, 2013	5.2	5.6
Paid-in Capital	660.1	694.8
Retained Earnings	1,202.70	1,215.80
Accumulated Other Comprehensive Income	222.7	135.3
Total Shareholders’ Equity	2,090.70	2,051.50
Total Liabilities and Shareholders’ Equity	$7,833.40	$7,656.40

Consolidated_Balance_Sheets_Co

Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Amortized Cost of Fixed Maturity Securities	$4,341.70	$4,370.50
Equity Securities at Cost	561.5	530
Fair Value of Notes Payable	$804.40	$667.10
Common Stock, Par Value	$0.10	$0.10
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	52,418,246	55,653,437
Common Stock, Shares Outstanding	52,418,246	55,653,437

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Earned Premiums	$451.50	$462.80	$470.30	$477.60	$495.60	$507.50	$512.80	$509.90	$1,862.20	$2,025.80	$2,107.10
Net Investment Income	93.1	72.3	72.6	71.1	76.9	82.4	74.6	80.8	309.1	314.7	295.9
Other Income	0.6	0.5	0.2	0.1	0.3	0.1	0.2	0.2	1.4	0.8	0.8
Net Realized Gains on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Other-than-temporary Impairment Losses:
Total Other-than-temporary Impairment Losses	-6.5	-3.8	-4.1	-0.8	-7.6	-3.5	-2.3	-2.4	-15.2	-15.8	-7.2
Portion of Losses Recognized in Other Comprehensive Income	0	0	0	0	0	0.1	1.3	0.5	0	1.9	0.3
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Total Revenues	559.7	539.8	542.5	554.6	586	635.7	588.9	615.9	2,196.60	2,426.50	2,462.30
Expenses:
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	285.8	300.5	347.5	327.9	315.5	338.3	354.2	349.2	1,261.70	1,357.20	1,582.10
Insurance Expenses	156.4	158.6	161.3	152.1	162.9	170.1	163.1	158.3	628.4	654.4	672.3
Write-off of Long-lived Asset	0	54.6	0	0					54.6	0	0
Interest and Other Expenses	24.4	22.1	22.5	22.7	26.2	25.3	25.2	23.8	91.7	100.5	85.5
Total Expenses	466.6	535.8	531.3	502.7	504.6	533.7	542.5	531.3	2,036.40	2,112.10	2,339.90
Income from Continuing Operations before Income Taxes	93.1	4	11.2	51.9	81.4	102	46.4	84.6	160.2	314.4	122.4
Income Tax Expense	-29.8	0.8	-1.9	-16.7	-26.6	-33.4	-13.9	-26	-47.6	-99.9	-30.6
Income from Continuing Operations	63.3	4.8	9.3	35.2	54.8	68.6	32.5	58.6	112.6	214.5	91.8
Discontinued Operations:
Income from Discontinued Operations	2.1	-0.1	0	-0.1	0.4	1.5	1.5	-0.2	1.9	3.2	11.6
Net Income	$65.40	$4.70	$9.30	$35.10	$55.20	$70.10	$34	$58.40	$114.50	$217.70	$103.40
Income from Continuing Operations Per Unrestricted Share:
Income from Continuing Operations Per Unrestricted Share - Basic	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.75	$1.55
Income from Continuing Operations Per Unrestricted Share - Diluted	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.74	$1.54
Net Income Per Unrestricted Share:
Net Income Per Unrestricted Share - Basic	$1.24	$0.09	$0.17	$0.63	$0.99	$1.24	$0.59	$1	$2.12	$3.81	$1.75
Net Income Per Unrestricted Share - Diluted	$1.24	$0.09	$0.17	$0.63	$0.99	$1.23	$0.59	$1	$2.12	$3.80	$1.74
Dividends Paid to Shareholders Per Share	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.96	$0.96	$0.96

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Comprehensive Income [Abstract]
Net Income	$114.50	$217.70	$103.40
Unrealized Holding Gains (Losses)	234.6	-362.8	96.7
Foreign Currency Translation Adjustments	-1	0.2	1.6
Decrease (Increase) in Net Unrecognized Postretirement Benefit Costs	-98.5	86.6	-13.2
Other Comprehensive Income (Loss) Before Income Taxes	135.1	-276	85.1
Other Comprehensive Income Tax Benefit (Expense)	-47.7	98.6	-30.4
Other Comprehensive Income (Loss)	87.4	-177.4	54.7
Total Comprehensive Income	$201.90	$40.30	$158.10

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net Income	$114.50	$217.70	$103.40
Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities:
Decrease (Increase) in Deferred Policy Acquisition Costs	-0.4	0.5	-9.4
Amortization of Life VIF and P&C Customer Relationships	7.2	8.3	8
Equity in Earnings of Equity Method Limited Liability Investments	-9	-26.4	-9.3
Distribution of Accumulated Earnings of Equity Method Limited Liability Investments	21.7	15.4	15.4
Decrease in Value of Fair Value Option Investments reported in Investment Income	0.7	0	0
Amortization of Investment Securities and Depreciation of Investment Real Estate	15.4	16.2	15.2
Net Realized Gains on Sales of Investments	39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings	15.2	13.9	6.9
Gain on Sale of Portfolio of Automobile Loan Receivables	0	0	-12.9
Benefit for Loan Losses	0	0	-2
Depreciation of Property and Equipment	16	17.4	15.3
Write-off of Long-lived Asset	54.6	0	0
Decrease in Other Receivables	46.2	43.5	13.9
Decrease in Insurance Reserves	-54.7	-72.5	-1.1
Decrease in Unearned Premiums	-62	-52	-15.2
Change in Income Taxes	11.2	57.9	-14.9
Decrease in Accrued Expenses and Other Liabilities	-20.3	-54.8	-15.6
Other, Net	16.4	36.1	33.4
Net Cash Provided by Operating Activities	133.6	122.1	65.7
Investing Activities:
Sales, Paydowns and Maturities of Fixed Maturities	573.7	664.4	914.4
Purchases of Fixed Maturities	-553	-744.5	-872.6
Sales of Equity Securities	245.3	182.1	70.8
Purchases of Equity Securities	-235.2	-213.4	-137.7
Acquisition and Improvements of Investment Real Estate	-2.1	-5.4	-5.5
Sales of Investment Real Estate	0.9	102.7	6
Sales of and Return of Investment of Equity Method Limited Liability Investments	55.2	31.3	56
Acquisitions of Equity Method Limited Liability Investments	-21.4	-20.5	-31
Sales of Fair Value Option Investments	6.9	0	0
Purchases of Fair Value Option Investments	-60.9	0	0
Decrease (Increase) in Short-term Investments	-63.9	41.8	-80
Receipts from Automobile Loan Receivables	0	0	2
Net Proceeds from Sale of Portfolio of Automobile Loan Receivables	0	0	16.7
Disposition of Business, Net of Cash Disposed	8.9	3.8	0
Increase in Other Investments	-8	-9.1	-12.4
Purchase of Corporate-owned Life Insurance	-33.5	0	0
Acquisition of Software	-11.3	-15.2	-26.5
Other, Net	-5.9	-13.2	-6.4
Net Cash Provided (Used) by Investing Activities	-104.3	4.8	-106.2
Financing Activities:
Net Proceeds from Issuance of Subordinated Debentures	144	0	0
Repayments of Debt	0	-5.5	0
Common Stock Repurchases	-114	-100.4	-60.7
Dividends and Dividend Equivalents Paid	-51.8	-54.9	-56.9
Cash Exercise of Stock Options	0.5	1.7	1.3
Other, Net	1.6	2.4	1.9
Net Cash Used by Financing Activities	-19.7	-156.7	-114.4
Increase (Decrease) in Cash	9.6	-29.8	-154.9
Cash, Beginning of Year	66.5	96.3	251.2
Cash, End of Year	$76.10	$66.50	$96.30

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders’ Equity (USD $)	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
In Millions, unless otherwise specified
Beginning Balance at Dec. 31, 2011	$2,116.60	$6	$743.90	$1,108.70	$258
Beginning Balance, shares at Dec. 31, 2011		60.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	103.4			103.4
Other Comprehensive Income	54.7				54.7
Cash Dividends to Shareholders	-56.9			-56.9
Repurchases of Common Stock	-60.7	-0.2	-24.9	-35.6
Repurchases of Common Stock, shares	-2	-2
Equity-based Compensation Cost	5.8		5.8
Equity-based Awards, Net of Shares Exchanged	-1.2		0.2	-1.4
Equity-based Awards, Net of Shares Exchanged, shares		0.2
Ending Balance at Dec. 31, 2012	2,161.70	5.8	725	1,118.20	312.7
Ending Balance, shares at Dec. 31, 2012		58.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	217.7			217.7
Other Comprehensive Income	-177.4				-177.4
Cash Dividends to Shareholders	-54.9			-54.9
Repurchases of Common Stock	-100.4	-0.2	-36.8	-63.4
Repurchases of Common Stock, shares	-3	-3
Equity-based Compensation Cost	5.5		5.5
Equity-based Awards, Net of Shares Exchanged	-0.7		1.1	-1.8
Equity-based Awards, Net of Shares Exchanged, shares		0.2
Ending Balance at Dec. 31, 2013	2,051.50	5.6	694.8	1,215.80	135.3
Ending Balance, shares at Dec. 31, 2013		55.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	114.5			114.5
Other Comprehensive Income	87.4				87.4
Cash Dividends to Shareholders	-51.8			-51.8
Repurchases of Common Stock	-115.5	-0.4	-40.2	-74.9
Repurchases of Common Stock, shares	-3.2	-3.2
Equity-based Compensation Cost	6.4		6.4
Equity-based Awards, Net of Shares Exchanged	-1.8		-0.9	-0.9
Equity-based Awards, Net of Shares Exchanged, shares		-0.1
Ending Balance at Dec. 31, 2014	$2,090.70	$5.20	$660.10	$1,202.70	$222.70
Ending Balance, shares at Dec. 31, 2014		52.4

Basis_of_Presentation_And_Sign

Basis of Presentation And Significant Estimates	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Significant Estimates	NOTE 1. BASIS OF PRESENTATION AND SIGNIFICANT ESTIMATES
	The Consolidated Financial Statements included herein have been prepared on the basis of accounting principles generally accepted in the United States (“GAAP”) and include the accounts of Kemper Corporation (“Kemper”) and its subsidiaries (individually and collectively referred to herein as the “Company”). All significant intercompany accounts and transactions have been eliminated.
	In the first quarter of 2014, the Company realigned its property and casualty insurance businesses. As a result of the realignment, the property and casualty insurance businesses are being reported as a single business segment named the Property & Casualty Insurance segment. The Company has reclassified certain prior-year amounts in its segment results in the Consolidated Financial Statements to conform to the current year presentation.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates and assumptions.
	The fair values of the Company’s Investments in Fixed Maturities, Investments in Equity Securities, Fair Value Option Investments, Short-term Investments, Trading Securities and Debt are estimated using a hierarchal framework which prioritizes and ranks market price observability. The carrying amounts reported in the Consolidated Balance Sheets approximate fair value for Cash, Short-term Investments and certain other assets and other liabilities because of their short-term nature. The actual value at which financial instruments could actually be sold or settled with a willing buyer or seller may differ from estimated fair values depending on a number of factors, including, but not limited to, current and future economic conditions, the quantity sold or settled, the presence of an active market and the availability of a willing buyer or seller.
	The process of estimating and establishing reserves for losses and LAE for property and casualty insurance is inherently uncertain, and the actual ultimate net cost of known and unknown claims may vary materially from the estimated amounts reserved. The reserving process is particularly imprecise for claims involving long-tailed exposures, which may not be discovered or reported until years after the insurance policy period has ended. Management considers a variety of factors, including, but not limited to, past claims experience, current claim trends and relevant legal, economic and social conditions, in estimating reserves. A change in any one or more factors is likely to result in the ultimate net claim costs to differ from the estimated reserve. Changes in such estimates may be material and would be recognized in the Consolidated Financial Statements when such estimates change.
	The process of determining whether an asset is impaired or recoverable relies on projections of future cash flows, operating results and market conditions. Projections are inherently uncertain, and, accordingly, actual future cash flows may differ materially from projected cash flows. As a result, the Company’s assessment of the impairment of long-lived assets is susceptible to the risk inherent in making such projections.

Summary_Of_Accounting_Policies

Summary Of Accounting Policies And Accounting Changes	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary Of Accounting Policies And Accounting Changes	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES
	Investments
	Investments in Fixed Maturities include bonds, notes and redeemable preferred stocks. Investments in Fixed Maturities are classified as available for sale and reported at fair value. Net Investment Income, including amortization of purchased premiums and accretion of market discounts, on Investments in Fixed Maturities is recognized as interest over the period that it is earned using the effective yield method.
	Investments in Equity Securities include common and non-redeemable preferred stocks and other equity interests and are reported at fair value. Investments in common and non-redeemable preferred stocks with readily determinable fair values are classified as available for sale. Dividend income on investments in common and non-redeemable preferred stocks is recognized on the ex-dividend date. Other equity interests primarily consist of exchange traded funds and interests in limited liability companies and limited partnerships in which the Company’s interests are deemed minor. The Company’s share of distributed earnings from other equity interests is recognized as dividend income when received.
	Unrealized appreciation or depreciation, net of applicable deferred income taxes, on fixed maturities and equity securities classified as available for sale is reported in AOCI included in Shareholders’ Equity.
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	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.
	Fair Value Option Investments include investments in certain hedge funds, which the Company has elected the fair value option (“FVO”) to account for such investments. Under the FVO method of accounting, the Company reports changes in the fair value of such investments in Net Investment Income in the Consolidated Statement of Income. The hedge funds are designed to preserve liquidity, while providing higher returns than Kemper would otherwise expect to earn had it invested in other short-term investments.
	Short-term Investments include fixed maturities that mature within one year from the date of purchase, U.S. Treasury bills, money market mutual funds and repurchase agreements. Short-term Investments are reported at cost, which approximates fair value.
	Other Investments primarily include loans to policyholders and real estate. Loans to policyholders are carried at unpaid principal balance. Real estate is carried at cost, net of accumulated depreciation. Real estate is depreciated over the estimated useful life of the asset using the straight-line method of depreciation. Real estate is evaluated for impairment when events or circumstances indicate the carrying value may not be recoverable. An impairment loss on real estate is recognized when the carrying value exceeds the sum of undiscounted projected future cash flows as well as the fair value, or, in the case of a property classified as held for sale, when the carrying value exceeds the fair value, net of costs to sell.
	Gains and losses on sales of investments are computed on the specific identification method and are reported in the Consolidated Statements of Income in the period in which the sales occur. 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. Losses are computed on the specific identification method and reported in the Consolidated Statements of Income in the period that the decline is determined to be other than temporary. The portion of an impairment of an investment in a fixed maturity attributed to a credit loss is reported in Net Impairment Losses Recognized in Earnings in the Consolidated Statement of Income, with the portion of the impairment that is not attributed to a credit loss reported in AOCI.
	Fair Value Measurements
	The Company uses a hierarchal framework which prioritizes and ranks the market observability of inputs used in fair value measurements. Market price observability is affected by a number of factors, including the type of asset or liability and the characteristics specific to the asset or liability being measured. Assets and liabilities with readily available, active, quoted market prices or for which fair value can be measured from actively quoted prices generally are deemed to have a higher degree of market price observability and a lesser degree of judgment used in measuring fair value. The Company classifies the inputs used to measure fair value into one of three levels as follows:
	•	Level 1 — Quoted prices in an active market for identical assets or liabilities;
	•	Level 2 — Observable inputs other than Level 1, quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and model-derived prices whose inputs are observable or whose significant value drivers are observable; and
	•	Level 3 — Unobservable inputs for the asset or liability being measured.
	Observable inputs are based on market data obtained from independent sources, while unobservable inputs are based on the Company’s market assumptions. Unobservable inputs require significant management judgment or estimation. In some cases, the inputs used to measure an asset or liability may fall into different levels of the fair value hierarchy. In those cases, the fair value measurement is categorized in its entirety in the same level of the fair value hierarchy as the lowest level of input that is significant to the entire measurement. Such determination requires significant management judgment. However, in accordance with GAAP, the Company is not permitted to use management judgment to adjust quoted market prices in an active market.
	Deferred Policy Acquisition Costs
	Costs directly associated with the successful acquisition of business, principally commissions and certain premium taxes and policy issuance costs, are deferred. Costs deferred on property and casualty insurance contracts and short duration health insurance contracts are amortized over the period in which premiums are earned. Costs deferred on traditional life insurance products and other long-duration insurance contracts are primarily amortized over the anticipated premium-paying period of the
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	related policies in proportion to the ratio of the annual premiums to the total premiums anticipated, which is estimated using the same assumptions used in calculating policy reserves.
	Goodwill
	The cost of an acquired entity over the fair value of net assets acquired is reported as Goodwill. Goodwill is not amortized, but rather is tested annually for recoverability or when certain triggering events require testing.
	Insurance Reserves
	Reserves for losses and LAE on property and casualty insurance coverage and health insurance coverage represent the estimated claim cost and loss adjustment expense necessary to cover the ultimate net cost of investigating and settling all losses incurred and unpaid. Such estimates are based on individual case estimates for reported claims and estimates for incurred but not reported (“IBNR”) losses. These estimates are adjusted in the aggregate for ultimate loss expectations based on historical experience patterns and current economic trends, with any change in the estimated ultimate liabilities being reported in the Consolidated Statements of Income in the period of change. Changes in such estimates may be material.
	For traditional life insurance products, the reserves for future policy benefits are estimated on the net level premium method using assumptions as of the issue date for mortality, interest, policy lapses and expenses, including provisions for adverse mortality. These assumptions vary by such characteristics as plan, age at issue and policy duration. Mortality assumptions are based on the Company’s historical experience and industry standards. Interest rate assumptions principally range from 3% to 7%. Lapse rate assumptions are based on actual and industry experience. Insurance Reserves for life insurance products also includes an estimate of the Company’s liability for unpaid life insurance claims and claims adjustment expenses, which includes an estimate for IBNR life insurance claims. Except when required by applicable law, the Company does not utilize a database of reported deaths maintained by the Social Security Administration or a comparable database (a “Death Master File”) in its operations, including to determine its IBNR liability for life insurance products. Instead of using such a database, the Company calculates its IBNR liability for life insurance products using Company-specific historical information, which includes analyzing average paid claims and the average lag between date of death and the date reported to the Company for claims that due proof of death has been provided.
	Other Receivables
	Other Receivables primarily include reinsurance recoverables and accrued investment income.
	Other Assets
	Other Assets primarily include property and equipment, internal use software, insurance licenses acquired in business combinations, the value of other intangible assets acquired, corporate-owned life insurance and prepaid expenses. Property and equipment is depreciated over the useful lives of the assets, generally using the straight-line or double declining balance methods of depreciation depending on the asset involved. Internal use software is primarily amortized over the useful life of the asset using the straight-line method of amortization. Write-off of Long-lived Asset for the year ended December 31, 2014 was a charge of $54.6 million to write off certain software that the Company determined that it was no longer probable that the software would be fully implemented. Insurance licenses acquired in business combinations and other indefinite life intangibles are not amortized, but rather tested periodically for recoverability. Insurance Expenses for the year ended December 31, 2013 includes a charge of $1.4 million to write down the value of insurance licenses acquired for one of Kemper’s insurance subsidiaries to its estimated fair value. Corporate-owned life insurance is reported at cash surrender value with changes due to cost of insurance and investment experience reported in Other Income in the Consolidated Statements of Income.
	The Company accounts for the present value of the future profits embedded in life insurance in force acquired (“Life VIF”) based on actuarial estimates of the present value of estimated net cash flows. Life VIF was $36.5 million and $41.2 million at December 31, 2014 and 2013, respectively. Life VIF is amortized using the effective interest method using interest rates consistent with the rates in the underlying insurance contracts. The Company estimates that it will record Life VIF amortization, net of interest, of $4.2 million in 2015, $3.7 million in 2016, $3.2 million in 2017, $2.9 million in 2018 and $2.4 million in 2019. The Company evaluates the Life VIF for recoverability annually.
	The Company accounts for the present value of the future profits embedded in Property and Casualty Insurance Customer Relationships Acquired (“P&C Customer Relationships”) based on the present value of estimated future cash flows from the customer relationships acquired. P&C Customer Relationships was $13.3 million and $15.8 million at December 31, 2014 and
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	2013, respectively. P&C Customer Relationships is amortized using the effective interest method. P&C Customer Relationships is tested for recoverability using undiscounted projections of future cash flows and written down to estimated fair value if the carrying value exceeds the sum of such projections of undiscounted cash flows.
	Accrued Expenses and Other Liabilities
	Accrued Expenses and Other Liabilities primarily include accrued salaries and commissions, pension benefits, postretirement medical benefits and accrued taxes, licenses and fees.
	Recognition of Earned Premiums and Related Expenses
	Property and casualty insurance and short duration health insurance premiums are deferred when written and recognized and earned ratably over the periods to which the premiums relate. Unearned Premiums represent the portion of the premiums written related to the unexpired portion of policies in force which has been deferred and is reported as a liability. A premium deficiency reserve is established if the sum of expected claim costs, claim adjustment expenses, unamortized deferred policy acquisition costs and maintenance costs exceeds the related unearned premiums. For each business segment, the analysis is performed at a product line level, namely automobile insurance, homeowners insurance and other insurance, which is consistent with the manner in which the Company acquires, services and measures profitability. Anticipated investment income is excluded from such analysis.
	Traditional life insurance premiums are recognized as revenue when due. Policyholders’ benefits are associated with related premiums to result in recognition of profits over the periods for which the benefits are provided using the net level premium method.
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses include provisions for future policy benefits under life and certain accident and health insurance contracts and provisions for reported claims, estimates for claims incurred but not reported and loss adjustment expenses. Benefit payments in excess of policy account balances are expensed.
	Reinsurance
	In the normal course of business, Kemper’s insurance subsidiaries reinsure certain risks above certain retention levels with other insurance enterprises. These reinsurance agreements do not relieve Kemper’s insurance subsidiaries of their legal obligations to the policyholder. Amounts recoverable from reinsurers are included in Other Receivables.
	Gains related to long-duration reinsurance contracts are deferred and amortized over the life of the underlying reinsured policies. Losses related to long-duration reinsurance contracts are recognized immediately. Any gain or loss associated with reinsurance agreements for which Kemper’s insurance subsidiaries have been legally relieved of their obligations to the policyholder is recognized in the period of relief.
	Income Taxes
	Deferred income tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred income tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. A valuation allowance is maintained for the portion of deferred income tax assets that the Company does not expect to recover. Increases in the valuation allowance for deferred income tax assets are recognized as
	income tax expense. Decreases in the valuation allowance for deferred income tax assets are recognized as income tax benefit. The effect on deferred income tax assets and liabilities of a change in tax rates is recognized in income in the period in which the change is enacted.
	The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in an income tax return. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in income tax expense.
	Adoption of New Accounting Standards
	All recently issued accounting pronouncements with effective dates prior to January 1, 2015 have been adopted by the Company. There were no adoptions in 2014 that had a material impact on the Consolidated Financial Statements. All other
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	recently issued accounting pronouncements with effective dates after December 31, 2014 are not expected to have a material impact on the Consolidated Financial Statements.

Investments

Investments	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investments	NOTE 3. INVESTMENTS
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 were:
	DOLLARS IN MILLIONS		Amortized			Gross Unrealized						Fair Value
			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
	Included in the fair value of Mortgage and Asset-backed investments at December 31, 2014 are $3.9 million of collateralized debt obligations, $1.3 million of non-governmental residential mortgage-backed securities and $0.2 million of other asset-backed securities.
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2013 were:
			Amortized			Gross Unrealized						Fair Value
	DOLLARS IN MILLIONS		Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities		$	351.1		$	22.8		$	(11.7	)	$	362.2
	States and Political Subdivisions		1,327.40			53.8			(20.2		)	1,361.00
	Corporate Securities:
	Bonds and Notes		2,636.40			205			(47.7		)	2,793.70
	Redeemable Preferred Stocks		6.6			0.8			—			7.4
	Collateralized Loan Obligations		44.2			0.5			—			44.7
	Other Mortgage- and Asset-backed		4.8			1.3			(0.1		)	6
	Investments in Fixed Maturities		$	4,370.50		$	284.2		$	(79.7	)	$	4,575.00
	Included in the fair value of Mortgage and Asset-backed investments at December 31, 2013 are $4.6 million of collateralized debt obligations, $1.2 million of non-governmental residential mortgage-backed securities and $0.2 million of other asset-backed securities.
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 by contractual maturity were:
	DOLLARS IN MILLIONS		Amortized Cost			Fair Value
	Due in One Year or Less		$	51		$	52.7
	Due after One Year to Five Years		769.6			820.2
	Due after Five Years to Ten Years		1,340.70			1,398.00
	Due after Ten Years		1,979.40			2,294.30
	Mortgage- and Asset-backed Securities Not Due at a Single Maturity Date		201			212.4
	Investments in Fixed Maturities		$	4,341.70		$	4,777.60
	NOTE 3. INVESTMENTS (Continued)
	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 December 31, 2014 consisted of securities issued by the Government National Mortgage Association with a fair value of $133.1 million, securities issued by the Federal National Mortgage Association with a fair value of $9.2 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 $69.8 million.
	There were no unsettled purchases or sales of Investments in Fixed Maturities at December 31, 2014. There were no unsettled purchases of Investments in Fixed Maturities at December 31, 2013. Other Receivables at December 31, 2013 includes a receivable of $2.5 million primarily from sales of Investments in Fixed Maturities that settled in January 2014.
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2014 were:
	DOLLARS IN MILLIONS		Cost			Gross Unrealized						Fair Value
						Gains			Losses
	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
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2013 were:
	DOLLARS IN MILLIONS					Gross Unrealized
			Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate		$	85.4		$	2.9		$	(2.5	)	$	85.8
	Other Industries		20.1			4.4			(0.1		)	24.4
	Common Stocks:
	Manufacturing		83.4			21.3			(0.1		)	104.6
	Other Industries		68.8			17			(0.9		)	84.9
	Other Equity Interests:
	Exchange Traded Funds		122			3.9			(1.0		)	124.9
	Limited Liability Companies and Limited Partnerships		150.3			25.2			(1.6		)	173.9
	Investments in Equity Securities		$	530		$	74.7		$	(6.2	)	$	598.5
	NOTE 3. INVESTMENTS (Continued)
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2014 is presented below.
DOLLARS IN MILLIONS		Less Than 12 Months						12 Months or Longer						Total
		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	)
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 Consolidated Statements of Income in the periods when such determinations are made.
NOTE 3. 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.
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 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 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 December 31, 2014.
NOTE 3. INVESTMENTS (Continued)
An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2013 is presented below:
DOLLARS IN MILLIONS		Less Than 12 Months						12 Months or Longer						Total
		Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
Fixed Maturities:
U.S. Government and Government Agencies and Authorities		$	95.8		$	(10.9	)	$	4.4		$	(0.8	)	$	100.2	$	(11.7	)
States and Political Subdivisions		222.9			(20.1		)	2			(0.1		)	224.9		(20.2		)
Corporate Securities:
Bonds and Notes		699.8			(39.4		)	103.2			(8.3		)	803		(47.7		)
Other Mortgage- and Asset-backed		13.9			(0.1		)	1.1			—			15		(0.1		)
Total Fixed Maturities		1,032.40			(70.5		)	110.7			(9.2		)	1,143.10		(79.7		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate		22.5			(2.5		)	2.5			—			25		(2.5		)
Other Industries		4.3			(0.1		)	0.7			—			5		(0.1		)
Common Stocks:
Manufacturing		5			(0.1		)	0.2			—			5.2		(0.1		)
Other Industries		14.2			(0.9		)	0.5			—			14.7		(0.9		)
Other Equity Interests:
Exchange Traded Funds		67.6			(1.0		)	—			—			67.6		(1.0		)
Limited Liability Companies and Limited Partnerships		53.1			(0.9		)	5			(0.7		)	58.1		(1.6		)
Total Equity Securities		166.7			(5.5		)	8.9			(0.7		)	175.6		(6.2		)
Total		$	1,199.10		$	(76.0	)	$	119.6		$	(9.9	)	$	1,318.70	$	(85.9	)
Unrealized losses on fixed maturities, which the Company determined to be temporary at December 31, 2013, were $79.7 million, of which $9.2 million was related to fixed maturities that were in an unrealized loss position for 12 months or longer. There were no unrealized losses at December 31, 2013 related to securities for which the Company has recognized credit losses in earnings in the preceding table under the heading “Less Than 12 Months.” Included in the preceding table under the heading “12 Months or Longer” there were unrealized losses of $0.3 million at December 31, 2013 related to securities for which the Company has recognized credit losses in earnings. Investment-grade fixed maturity investments comprised $74.2 million and below-investment-grade fixed maturity investments comprised $5.5 million of the unrealized losses on investments in fixed maturities at December 31, 2013. For below-investment-grade fixed maturity investments in an unrealized loss position, the unrealized loss amount, on average, was less than 5% of the amortized cost basis of the investment. At December 31, 2013, the Company did not have the intent to sell these investments and it was not more likely than not that the Company would be required to sell these investments before recovery of its amortized cost basis, which may be at maturity. Based on the Company’s evaluation at December 31, 2013 of the prospects of the issuers, including, but not limited to, the credit ratings of the issuers of the investments in the fixed maturities, and the Company’s intention to not sell and its determination that it would not be required to sell before 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.
The Company concluded that the unrealized losses on its investments in preferred and common stocks at December 31, 2013 were temporary based on 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 liability partnerships that primarily invest in distressed debt, mezzanine 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 liability partnerships also exhibit debt-like characteristics which, among other factors, the Company considers when evaluating these investments for
NOTE 3. INVESTMENTS (Continued)
impairment. Based on Company’s evaluations, 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 December 31, 2013.
The following table sets forth the pre-tax amount of OTTI credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of December 31, 2014, 2013 and 2012, for which a portion of the OTTI loss related to factors other than credit has been recognized in AOCI, and the corresponding changes in such amounts.
DOLLARS IN MILLIONS		2014			2013			2012
Balance at Beginning of Year		$	9.9		$	4.6		$	3.9
Additions for Previously Unrecognized OTTI Credit Losses		2.4			1.8			1.1
Increases to Previously Recognized OTTI Credit Losses		0.6			7.3			—
Reductions to Previously Recognized OTTI Credit Losses		—			—			(0.1		)
Reductions for Change in Impairment Status:
From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell		(2.4		)	(3.2		)	—
Reductions for Investments Sold During Period		(5.2		)	(0.6		)	(0.3		)
Balance at End of Year		$	5.3		$	9.9		$	4.6
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 December 31, 2014 is limited to the total carrying value of $184.8 million. In addition, the Company had outstanding commitments totaling approximately $37.7 million to fund Equity Method Limited Liability Investments at December 31, 2014.
The carrying values of the Company’s Other Investments at December 31, 2014 and 2013 were:
DOLLARS IN MILLIONS		2014			2013
Loans to Policyholders at Unpaid Principal		$	283.4		$	275.4
Real Estate at Depreciated Cost		160.9			167.1
Trading Securities at Fair Value		4.9			5
Other		0.4			0.5
Total		$	449.6		$	448

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	NOTE 4. GOODWILL
	Goodwill balances by business segment at December 31, 2014 and December 31, 2013 were:
	DOLLARS IN MILLIONS	2014		2013
	Property & Casualty Insurance	92.4		92.4
	Life & Health Insurance	219.4		219.4
	Total	$	311.8	$	311.8
	The Company tests goodwill for recoverability on an annual basis at the beginning of the first quarter and, if circumstances or events indicate that the fair value of a reporting unit may have declined below its carrying value, such tests are performed at intervening interim periods. The Company principally used projections of discounted future cash flows to estimate the fair values of the reporting units tested. For each reporting unit tested, the estimated fair value exceeded the carrying value of the reporting unit, and the Company concluded that the associated goodwill was recoverable at the aforementioned dates tested.

Property_and_Casualty_Insuranc

Property and Casualty Insurance Reserves	12 Months Ended
	Dec. 31, 2014
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]
Property and Casualty Insurance Reserves	NOTE 5. PROPERTY AND CASUALTY INSURANCE RESERVES
	Property and Casualty Insurance Reserve activity for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Beginning Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	843.5		$	970.6		$	1,029.10
	Less Reinsurance Recoverables at Beginning of Year	63.4			66.2			74.5
	Property and Casualty Insurance Reserves, Net of at Beginning of Year	780.1			904.4			954.6
	Incurred Losses and LAE related to:
	Current Year:
	Continuing Operations	965.4			1,056.50			1,253.10
	Prior Years:
	Continuing Operations	(53.5		)	(59.8		)	(25.2		)
	Discontinued Operations	(3.6		)	(4.8		)	(6.3		)
	Total Incurred Losses and LAE related to Prior Years	(57.1		)	(64.6		)	(31.5		)
	Total Incurred Losses and LAE	908.3			991.9			1,221.60
	Paid Losses and LAE related to:
	Current Year:
	Continuing Operations	639.8			682.2			801.4
	Prior Years:
	Continuing Operations	360.4			421.7			451.2
	Discontinued Operations	9.2			12.3			19.2
	Total Paid Losses and LAE related to Prior Years	369.6			434			470.4
	Total Paid Losses and LAE	1,009.40			1,116.20			1,271.80
	Property and Casualty Insurance Reserves, Net of Reinsurance at End of Year	679			780.1			904.4
	Plus Reinsurance Recoverables at End of Year	54.9			63.4			66.2
	Property and Casualty Insurance Reserves, Gross of Reinsurance at End of Year	$	733.9		$	843.5		$	970.6
	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 Consolidated Statements of Income in the period of change.
	In 2014, the Company reduced its property and casualty insurance reserves by $57.1 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance loss and LAE reserves developed favorably by $50.9 million and commercial lines insurance loss and LAE reserves developed favorably by $6.2 million. Personal automobile insurance loss and LAE reserves developed favorably by $31.6 million, homeowners insurance loss and LAE reserves developed favorably by $14.8 million, and other personal lines loss and LAE reserves developed favorably by $4.5 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 three most recent prior accident years. Commercial lines insurance loss and LAE reserves included favorable development of $2.6 million from continuing operations and $3.6 million from discontinued operations. Commercial lines insurance losses and LAE reserves developed favorably from continuing operations due primarily to the emergence of more favorable loss patterns than expected for the 2013, 2011 and 2010 accident years.
	NOTE 5. PROPERTY AND CASUALTY INSURANCE RESERVES (Continued)
	In 2013, the Company reduced its property and casualty insurance reserves by $64.6 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance loss and LAE reserves developed favorably by $56.8 million and commercial lines insurance loss and LAE reserves developed favorably by $7.8 million. Personal automobile insurance loss and LAE reserves developed favorably by $30.1 million, homeowners insurance loss and LAE reserves developed favorably by $20.1 million and other personal lines loss and LAE reserves developed favorably by $6.6 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 four most recent prior accident years. Commercial lines insurance loss and LAE reserves included favorable development of $3.0 million from continuing operations and $4.8 million from discontinued operations. Commercial lines insurance losses and LAE reserves developed favorably from continuing operations due primarily to the emergence of more favorable loss patterns than expected for the 2011, 2010 and 2009 accident years, partially offset by less favorable loss patterns than expected for the 2012 accident year.
	In 2012, the Company reduced its property and casualty insurance reserves by $31.5 million to recognize favorable development of losses and LAE from prior accident years. Personal lines insurance loss and LAE reserves developed favorably by $12.6 million and commercial lines insurance loss and LAE reserves developed favorably by $18.9 million. Personal automobile insurance loss and LAE reserves developed adversely by $2.2 million, homeowners insurance loss and LAE reserves developed favorably by $11.7 million and other personal lines loss and LAE reserves developed favorably by $3.1 million. Personal automobile loss and LAE reserves developed adversely for the 2011 accident year and developed favorably for the 2010, 2009 and 2008 accident years. Homeowners insurance loss and LAE reserves developed favorably due primarily to the emergence of more favorable loss patterns than expected for the three most recent prior accident years and favorable development on certain catastrophes. Commercial lines insurance loss and LAE reserves included favorable development of $12.6 million from continuing operations and $6.3 million from discontinued operations. Commercial lines insurance losses and LAE reserves developed favorably from continuing operations due primarily to the emergence of more favorable loss patterns than expected for the four most recent prior accident years. Commercial lines insurance loss and LAE reserves developed favorably from discontinued operations due primarily to the commutation of certain insurance liabilities that had been previously assumed.
	The Company cannot predict whether loss and LAE reserves will develop favorably or unfavorably from the amounts reported in the Consolidated Financial Statements. The Company believes that any such development will not have a material effect on the Company’s consolidated financial position, but could have a material effect on the Company’s consolidated financial results for a given period.
	Reinsurance recoverables on property and casualty insurance reserves were $54.9 million and $63.4 million at December 31, 2014 and 2013, respectively. These recoverables are concentrated with several reinsurers, the vast majority of which are highly rated by one or more of the principal investor and/or insurance company rating agencies. While most of these recoverables were unsecured at December 31, 2014 and 2013, the agreements with the reinsurers generally provide for some form of collateralization upon the occurrence of certain events.

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	NOTE 6. DEBT
	Total amortized cost of debt outstanding at December 31, 2014 and 2013 was:
	DOLLARS IN MILLIONS	2014			2013
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	249.5		$	249
	6.00% Senior Notes due May 15, 2017	358.5			357.9
	7.375% Subordinated Debentures due February 27, 2054	144.1			—
	Total Debt Outstanding	$	752.1		$	606.9
	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Notes Payable under Revolving Credit Agreement	$	0.8		$	1.4		$	1.9
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	15.5			15.4			15.4
	6.00% Senior Notes due May 15, 2017	22.2			22.2			22.1
	7.375% Subordinated Debentures due February 27, 2054	9.4			—			—
	Mortgage Note Payable	—			0.2			0.4
	Interest Expense before Capitalization of Interest	47.9			39.2			39.8
	Capitalization of Interest	(1.0		)	(0.9		)	(1.8		)
	Total Interest Expense	$	46.9		$	38.3		$	38
	Interest Paid, including facility fees, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Notes Payable under Revolving Credit Agreement	$	0.6		$	0.8		$	2.3
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	15			15			15
	6.00% Senior Notes due May 15, 2017	21.6			21.6			21.6
	7.375% Subordinated Debentures due February 27, 2054	8.5			—			—
	Mortgage Note Payable	—			0.3			0.4
	Total Interest Paid	$	45.7		$	37.7		$	39.3
	Kemper has a four-year, $225.0 million, unsecured, revolving credit agreement, expiring March 7, 2016, with a group of financial institutions. The credit agreement provides for fixed and floating rate advances for periods up to six months at various interest rates. The credit agreement contains various financial covenants, including limits on total debt to total capitalization, consolidated net worth and minimum risk-based capital ratios for Kemper’s largest insurance subsidiaries, United Insurance and Trinity. Proceeds from advances under the credit agreement may be used for general corporate purposes, including repayment of existing indebtedness. There were no outstanding borrowings under the credit agreement at either December 31, 2014 or December 31, 2013.
	United Insurance and Trinity are members of the FHLB of Chicago and Dallas, respectively. The FHLB memberships provide United Insurance and Trinity with access to additional sources of liquidity. Effective December 31, 2013, Trinity and the FHLB of Dallas entered into agreements pursuant to which Trinity may obtain advances from the FHLB of Dallas. Effective March 18, 2014, United Insurance and the FHLB of Chicago entered into agreements pursuant to which United Insurance may obtain advances from the FHLB of Chicago. Advances from the FHLB of Dallas and Chicago are subject to collateral requirements as specified in the respective agreements with Trinity and United Insurance. There were no advances from the FHLB of Dallas or Chicago outstanding at either December 31, 2014 or December 31, 2013.
	NOTE 6. DEBT (Continued)
	On February 27, 2014, Kemper issued $150.0 million of its 7.375% subordinated debentures due February 27, 2054 . The net proceeds of the issuance were $144.0 million, net of discount and transaction costs, for an effective yield of 7.69%. The subordinated debentures are unsecured and are subordinated and junior to the senior indebtedness of Kemper. Interest on the subordinated debentures is payable quarterly. As long as no event of default has occurred, Kemper may defer interest payments on the subordinated debentures for up to five consecutive years without giving rise to an event of default. During a deferral period, interest will continue to accrue at the stated interest rate compounded quarterly. Kemper is permitted to redeem some or all of the subordinated debentures on or after February 27, 2019, at a redemption price that is equal to their principal amount plus accrued and unpaid interest. Kemper is permitted to redeem the subordinated debentures in whole, but not in part, at any time prior to February 27, 2019, within 90 days of the occurrence of certain tax events or rating agency events, at specified redemption prices.
	In 2010, Kemper issued $250 million of its 6.00% senior notes due November 30, 2015. The 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 issued the notes for proceeds of $247.8 million, net of transaction costs, for an effective yield of 6.21%.
	In 2007, Kemper issued $360 million of its 6.00% senior notes due May 15, 2017. The 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 issued the notes for proceeds of $354.8 million, net of transaction costs, for an effective yield of 6.19%.

Leases

Leases	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leases	NOTE 7. LEASES
	The Company leases certain office space under non-cancelable operating leases, with initial terms typically ranging from one to ten years, along with options that permit renewals for additional periods. The Company also leases certain equipment under non-cancelable operating leases, with initial terms typically ranging from one to five years. Minimum rent is expensed on a straight-line basis over the term of the lease.
	Net rental expense for operating leases for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Minimum Rental Expense	$	21.5		$	28.3		$	33.2
	Less Sublease Rental Income	(1.3		)	(1.8		)	(2.5		)
	Net Rental Expense	$	20.2		$	26.5		$	30.7
	Future minimum lease payments under capital and operating leases at December 31, 2014 were:
	DOLLARS IN MILLIONS	Capital			Operating
		Leases			Leases
	2015	$	1.9		$	16.5
	2016	1.9			14.1
	2017	0.6			12.9
	2018	0.1			9
	2019	—			7.7
	2020 and Thereafter	—			19.1
	Total Future Payments	$	4.5		$	79.3
	Less Imputed Interest	(0.4		)
	Present Value of Minimum Capital Lease Payments	$	4.1
	The total of minimum rentals to be received in the future under non-cancelable subleases was $5.9 million at December 31, 2014.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stockholders' Equity	NOTE 8. SHAREHOLDERS’ EQUITY
	Kemper is authorized to issue 20 million shares of $0.10 par value preferred stock and 100 million shares of $0.10 par value common stock. No preferred shares were issued or outstanding at December 31, 2014 and 2013. There were 52,418,246 shares and 55,653,437 shares of common stock outstanding at December 31, 2014 and 2013, respectively. Common stock outstanding included 163,720 shares and 278,427 shares at December 31, 2014 and 2013, respectively, that have been issued, subject to certain vesting and other requirements, in connection with the Company’s long-term equity compensation plans. See Note 9, “Long-Term Equity-based Compensation,” to the Consolidated Financial Statements for a discussion of the restrictions and vesting provisions.
	Kemper repurchased and retired 3.2 million shares of its common stock in open market transactions at an aggregate cost of $115.5 million in 2014. Kemper repurchased and retired 3.0 million shares of its common stock in open market transactions at an aggregate cost of $100.4 million in 2013. Kemper repurchased and retired 2.0 million shares of its common stock in open market transactions at an aggregate cost of $60.7 million in 2012.
	Various state insurance laws restrict the amount that an insurance subsidiary may pay in the form of dividends, loans or advances without the prior approval of regulatory authorities. Also, that portion of an insurance subsidiary’s net equity which results from differences between statutory insurance accounting practices and GAAP would not be available for cash dividends, loans or advances. Kemper’s insurance subsidiaries paid dividends of $217.5 million to Kemper in 2014. In 2015, Kemper’s insurance subsidiaries would be able to pay $218 million in dividends to Kemper without prior regulatory approval. Kemper’s insurance subsidiaries had net assets of $2.4 billion, determined in accordance with GAAP, that were restricted from payment to Kemper without prior regulatory approval at December 31, 2014.
	Kemper’s insurance subsidiaries are required to file financial statements prepared on the basis of statutory insurance accounting practices, a comprehensive basis of accounting other than GAAP. Statutory capital and surplus for the Company’s life and health insurance subsidiaries was $437.3 million and $430.2 million at December 31, 2014 and 2013, respectively. Statutory net income for the Company’s life and health insurance subsidiaries was $100.7 million, $81.5 million and $102.0 million for the years ended December 31, 2014, 2013 and 2012, respectively. Statutory capital and surplus for the Company’s property and casualty insurance subsidiaries was $947.5 million and $989.7 million at December 31, 2014 and 2013, respectively. Statutory net income for the Company’s property and casualty insurance subsidiaries was $85.7 million, $138.8 million and $40.6 million for the years ended December 31, 2014, 2013 and 2012, respectively. Statutory capital and surplus and statutory net income exclude parent company operations.
	Kemper’s insurance subsidiaries are also required to hold minimum levels of statutory capital and surplus to satisfy regulatory requirements. The minimum statutory capital and surplus, or company action level RBC, necessary to satisfy regulatory requirements for the Company’s life and health insurance subsidiaries collectively was $125.4 million at December 31, 2014. The minimum statutory capital and surplus necessary to satisfy regulatory requirements for the Company’s property and casualty insurance subsidiaries collectively was $288.7 million at December 31, 2014. Company action level RBC is the level at which a company is required to file a corrective action plan with its regulators and is equal to 200% of the authorized control level RBC.
	In 2014, Kemper paid dividends of $51.8 million to its shareholders. Except for certain financial covenants under the 2016 Credit Agreement, there are no restrictions on Kemper’s ability to pay dividends to its shareholders. Certain financial covenants, namely minimum net worth and a maximum debt to total capitalization ratio, under the 2016 Credit Agreement could limit the amount of dividends that Kemper may pay to shareholders at December 31, 2014. Kemper had the ability to pay without restrictions $268 million in dividends to its shareholders and still be in compliance with all financial covenants under the 2016 Credit Agreement at December 31, 2014.

Longterm_Equitybased_Compensat

Long-term Equity-based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Long-Term Equity-Based Compensation	NOTE 9. LONG-TERM EQUITY-BASED COMPENSATION
	On May 4, 2011, Kemper’s shareholders approved the 2011 Omnibus Equity Plan (“Omnibus Plan”). The Omnibus Plan replaced the Company’s previous employee stock option plans, director stock option plan and restricted stock plan (collectively, the “Prior Plans”). Awards previously granted under the Prior Plans remain outstanding in accordance with their original terms. Beginning May 4, 2011, equity-based compensation awards may only be granted under the Omnibus Plan. A maximum number of 10,000,000 shares of Kemper common stock may be issued under the Omnibus Plan (the “Share Authorization”). As of December 31, 2014, there were 8,243,636 common shares available for future grants under the Omnibus Plan, of which 517,500 shares were reserved for future grants based on the achievement of performance goals under the terms of outstanding performance-based restricted stock and performance-based restricted stock unit (“RSU”) awards.
	The design of the Omnibus Plan provides for fungible use of shares to determine the number of shares available for future grants, with a fungible conversion factor of three to one, such that the Share Authorization will be reduced at two different rates, depending on the type of award granted. Each share of Kemper common stock issuable upon the exercise of stock options or stock appreciation rights will reduce the number of shares available for future grant under the Share Authorization by one share, while each share of Kemper common stock issued pursuant to “full value awards” will reduce the number of shares available for future grant under the Share Authorization by three shares. “Full value awards” are awards, other than stock options or stock appreciation rights, that are settled by the issuance of shares of Kemper common stock and include restricted stock, RSUs and deferred stock units (“DSUs”), if settled with stock, and other stock-based awards.
	Outstanding equity-based compensation awards at December 31, 2014 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 DSUs. Effective February 4, 2014, the Company began issuing time-based and performance-based RSUs. Recipients of restricted stock receive full dividend and voting rights on the same basis by as all other outstanding shares of Kemper common stock. RSUs and DSUs give the recipient the right to receive one share of Kemper common stock for each RSU or DSU issued. Holders of RSUs and DSUs receive full dividend equivalents on the same basis as dividends are received by holders of all other outstanding shares of Kemper common stock, but do not receive voting rights until such shares are issued. Except as described below for equity-based compensation awards granted on or after May 1, 2013 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.
	For equity-based compensation awards with a graded vesting schedule, the Company recognizes compensation expense on a straight-line basis over the requisite service period for each separately-vesting portion of the awards as if each award were, in substance, multiple awards. Compensation expense is recognized only for those awards expected to vest, with forfeitures estimated at the date of grant based on the Company’s historical experience and future expectations. Equity-based compensation expense was $6.4 million, $5.5 million and $5.8 million for the years ended December 31, 2014, 2013 and 2012, respectively. Total unamortized compensation expense related to nonvested awards at December 31, 2014 was $4.4 million, which is expected to be recognized over a weighted-average period of 1.8 years.
	The Compensation Committee of the Board of Directors, or the Board’s authorized designee, has sole discretion to determine the persons to whom awards under the Omnibus Plan are granted, and the material terms of the awards. For Tandem Awards, material terms include the number of shares covered by such awards and the exercise price, vesting and expiration dates of such awards. Tandem Awards are non-transferable. The exercise price of Tandem Awards is the fair value of Kemper’s common stock on the date of grant. Employee Tandem Awards, time-based restricted stock awards and time-based RSU awards generally vest, beginning six months after date of grant, in four equal annual installments over a period of three and one-half years, with the Tandem Awards expiring ten years from the date of grant. Employee performance-based restricted stock and RSU awards generally vest over a period of three years, subject to achievement of performance goals and other restrictions.
	Each Non-employee Director receives an initial option to purchase 4,000 shares of Kemper common stock immediately upon becoming a director. In addition, on the date of each annual meeting of Kemper’s shareholders, eligible Non-employee Directors automatically receive annual grants of options to purchase 4,000 shares of common stock. Prior to May 1, 2013, such options granted to Non-employee Directors were exercisable one year from the date of grant at an exercise price equal to the fair market value of Kemper’s common stock on the date of grant and expire ten years from the date of grant. Effective May 1, 2013, new grants of such options are fully vested and exercisable on the date of grant at an exercise price equal to the fair market value of Kemper’s common stock on the date of grant. In addition to the option awards, effective May 1, 2013, annual awards to each Non-employee Director include 500 DSUs. The DSUs granted to Non-employee Directors are fully vested on the date of grant. Conversion of the DSUs into shares of Kemper’s common stock is deferred until the date a director’s board service terminates.
	NOTE 9. LONG-TERM EQUITY-BASED COMPENSATION (Continued)
	All of the Company’s prior stock option plans included provisions, subject to certain limitations, to automatically grant restorative, or reload stock options (“Restorative Options”), to replace shares of previously owned Kemper common stock that an exercising option holder surrenders, either actually or constructively, to satisfy the exercise price and/or tax withholding obligations relating to the exercise. The restorative feature was eliminated prospectively for original option awards granted on or after February 3, 2009. Restorative Options may still be granted, subject to certain limitations, in connection with the exercise of original options granted before February 3, 2009. Restorative Options are subject to the same terms and conditions as the original options, including the expiration date, except that the exercise price is equal to the fair value of Kemper common stock on the date of grant of a Restorative Option and cannot be exercised until six months after the date of grant. The grant of a Restorative Option does not result in an increase in the total number of shares and options held by an employee, but changes the mix of the two.
	The Company uses the Black-Scholes option pricing model to estimate the fair value of each Tandem Award on the date of grant. The expected terms of Tandem Awards are developed by considering the Company’s historical Tandem Award exercise experience, demographic profiles, historical share retention practices of employees and assumptions about their propensity for early exercise in the future. Further, the Company aggregates individual awards into relatively homogenous groups that exhibit similar exercise behavior to obtain a more refined estimate of the expected term of options. Expected volatility is estimated using weekly historical volatility. The Company believes that historical volatility is currently the best estimate of expected volatility. The dividend yield in 2014, 2013 and 2012 was calculated by taking the natural logarithm of the annualized yield divided by the Kemper common stock price on the date of grant. The risk-free interest rate was the yield on the grant date of U.S. Treasury zero coupon issues with a maturity comparable to the expected term of the option.
	The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the years ended December 31, 2014, 2013 and 2012, were as follows:
			2014					2013					2012
	RANGE OF VALUATION ASSUMPTIONS
	Expected Volatility		25.76	%	-	44.43	%	39.1	%	-	48.23	%	29.36	%	-	53.84	%
	Risk-free Interest Rate		1.07		-	2.14		0.62		-	1.38		0.16		-	1.26
	Expected Dividend Yield		2.53		-	2.6		2.83		-	3		2.92		-	3.26
	WEIGHTED-AVERAGE EXPECTED LIFE IN YEARS
	Employee Grants		4		-	7		4		-	7		1		-	7
	Director Grants		6					6					6
	Tandem Award activity for the year ended December 31, 2014 is presented below:
			Shares			Weighted-			Weighted-		Aggregate
			Subject to			average			average		Intrinsic
			Awards			Exercise Price			Remaining		Value
						Per Share ($)			Contractual		($ In Millions)
									Life (in Years)
	Outstanding at Beginning of the Year		2,543,673			$	41.37
	Granted		289,000			36.59
	Exercised		(46,125	)		29.04
	Forfeited or Expired		(520,837	)		46.94
	Outstanding at December 31, 2014		2,265,711			39.74			3.8		$	4.3
	Vested and Expected to Vest at December 31, 2014		2,242,297			$	39.8		3.8		$	4.2
	Exercisable at December 31, 2014		1,944,207			$	40.59		3		$	3.7
	The weighted-average grant-date fair values of Tandem Awards granted during 2014, 2013 and 2012 were $10.49, $10.20 and $9.40, respectively. Total intrinsic value of Tandem Awards exercised was $0.4 million, $4.1 million and $3.0 million for the years ended December 31, 2014, 2013 and 2012, respectively. Cash received from exercises of Tandem Awards was $0.5 million, $1.7 million and $1.3 million for the years ended December 31, 2014, 2013 and 2012, respectively. Total tax benefit
	NOTE 9. LONG-TERM EQUITY-BASED COMPENSATION (Continued)
	realized for tax deductions from exercises of Tandem Awards was $0.1 million, $1.4 million and $1.0 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Information pertaining to Tandem Awards outstanding at December 31, 2014 is presented below:
								Outstanding								Exercisable
	Range of Exercise Prices ($)							Shares			Weighted-			Weighted-		Shares		Weighted-
								Subject to			average			average		Subject to		average
								Awards			Exercise Price			Remaining		Awards		Exercise Price
											Per Share ($)			Contractual				Per Share ($)
														Life (in Years)
	$	10		-	$	15		15,000			$	13.55		2.26		15,000		$	13.55
	15.01			-	20			8,000			16.48			4.35		8,000		16.48
	20.01			-	25			29,000			23.36			3.86		29,000		23.36
	25.01			-	30			379,000			28.84			6.17		332,998		28.74
	30.01			-	35			226,250			33.16			8.12		130,500		32.94
	35.01			-	40			573,250			36.91			5.86		393,498		37.11
	40.01			-	45			184,902			43.1			0.09		184,902		43.1
	45.01			-	50			793,541			48.59			1.15		793,541		48.59
	50.01			-	55			56,768			51.16			0.1		56,768		51.16
	10			-	55			2,265,711			39.74			3.82		1,944,207		40.59
	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 year ended December 31, 2014 was as follows:
		Time-based Restricted Stock Awards						Time-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	101,627			$	31.48		—			$	—
	Granted	2,000			38.59			41,925			36.56
	Vested	(25,568	)		30.56			(9,351	)		36.47
	Forfeited	(24,964	)		30.96			(2,550	)		36.47
	Nonvested Balance at End of Period	53,095			$	32.42		30,024			$	36.6
Prior to February 3, 2009, only awards of time-vested restricted stock had been granted. Beginning on February 3, 2009, in addition to time-vested restricted stock granted to certain employees and officers, the Company began making performance-based restricted awards to certain officers and employees. 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.
NOTE 9. LONG-TERM EQUITY-BASED COMPENSATION (Continued)
If, at the end of the performance period, the Company’s relative performance:
•	exceeds the “target” performance level, additional shares of stock will be issued to the award recipient;
•	is below the “target” performance level, but at or above a “minimum” performance level, only a portion of the shares of performance-based restricted stock originally issued to the award recipient will vest; or
•	is below a “minimum” performance level, none of the shares of performance-based restricted stock originally issued to the award recipient will vest.
The grant date fair values of the performance-based restricted stock and performance-based RSU awards are determined using the Monte Carlo simulation method. The Monte Carlo simulation model produces a risk-neutral simulation of the daily returns on the common stock of Kemper and each of the other companies included in the peer group. Returns generated by the simulation depend on the risk-free interest rate used and the volatilities of, and the correlation between, these stocks. The model simulates stock prices and dividend payouts to the end of the three-year performance period. Total shareholder returns are generated for each of these stocks based on the simulated prices and dividend payouts. The total shareholder returns are then ranked, and Kemper’s simulated ranking is converted to a payout percentage based on the terms of the performance-based restricted stock and performance-based RSU awards. The payout percentage is applied to the simulated stock price at the end of the performance period, reinvested dividends are added back, and the total is discounted to the valuation date at the risk-free rate. This process is repeated approximately ten thousand times, and the grant date fair value is equal to the average of the results from these trials.
Activity related to nonvested performance-based restricted stock and nonvested performance-based RSU awards for the year ended December 31, 2014 was as follows:
	Performance-based Restricted Stock Awards						Performance-based RSU Awards
	Number of Shares			Weighted-			Number of RSUs			Weighted-
				average						average
				Grant-date						Grant-date
				Fair Value						Fair Value
				Per Share						Per RSU
Nonvested Balance at Beginning of the Year	176,800			$	39.54		—			$	—
Granted	—			—			66,575			40.5
Vested	(54,934	)		39.83			—			—
Forfeited	(11,241	)		40.75			(4,700	)		40.5
Nonvested Balance at End of Period	110,625			$	39.28		61,875			$	40.5
The number of additional shares that would be granted if the Company were to meet or exceed the maximum performance levels related to the outstanding performance-based awards for the 2014 and 2013 three-year performance periods was 61,875 common shares and 52,850 common shares, respectively, (as “full value awards,” the equivalent of 185,625 shares and 158,550 shares, respectively, under the Share Authorization) at December 31, 2014. 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 shares were forfeited on January 31, 2015, the three-year anniversary of their grant date. For the 2011 three-year performance period, the Company exceeded target performance levels with a payout percentage of 118%. Accordingly, an additional 9,014 shares of stock were issued to award recipients on February 1, 2014 (the “2011 Additional Shares”). For the 2010 three-year performance period, the Company exceeded target performance levels with a payout percentage of 114%. Accordingly, an additional 6,996 shares of stock were issued to award recipients on February 2, 2013 (the “2010 Additional Shares”). For the 2009 three-year performance period, the Company exceeded target performance levels with a payout percentage of 183%. Accordingly, an additional 40,727 shares of stock were issued to award recipients on February 3, 2012 (the “2009 Additional Shares”).
The total fair value of time-vested and performance-based restricted stock and RSUs that vested during the year ended December 31, 2014 and the 2011 Additional Shares that were issued was $3.6 million and the tax benefits for tax deductions realized from such shares was $1.2 million. The total fair value of the shares of time-vested and performance-based restricted stock that vested during the year ended December 31, 2013 and the 2010 Additional Shares was $4.1 million and the tax benefits for tax deductions realized from such shares was $1.4 million. The total fair value of the shares of time-vested and performance-based restricted stock that vested during the year ended December 31, 2012 and the 2009 Additional Shares was $4.0 million and the tax benefits for tax deductions realized from such shares was $1.4 million.
NOTE 9. LONG-TERM EQUITY-BASED COMPENSATION (Continued)
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. The total fair value of DSUs that vested during the years ended December 31, 2014 and 2013 was $0.2 million and $0.1 million, respectively.
Activity related to DSU awards for the year ended December 31, 2014 was as follows:
		Number of DSUs			Weighted-
					average
					Grant-date
					Fair Value
					Per DSU
Vested Balance at Beginning of the Year		4,000			$	31.5
Granted and Vested		4,000			37.53
Vested Balance at End of Period		8,000			$	34.52

Income_From_Continuing_Operati

Income From Continuing Operations Per Unrestricted Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Income from Continuing Operations Per Unrestricted Share	NOTE 10. INCOME FROM CONTINUING OPERATIONS PER UNRESTRICTED SHARE
	The Company’s awards of restricted stock contain rights to receive non-forfeitable dividends and participate in the undistributed earnings with common shareholders. The Company’s awards of RSUs and DSUs contain rights to receive non- forfeitable dividend equivalents and participate in the undistributed earnings with common shareholders. Accordingly, the Company is required to apply the two-class method of computing basic and diluted earnings per share. A reconciliation of the numerator and denominator used in the calculation of Basic Income from Continuing Operations Per Unrestricted Share and Diluted Income from Continuing Operations Per Unrestricted Share for the years ended December 31, 2014, 2013 and 2012 is as follows:
		2014			2013			2012
	DOLLARS IN MILLIONS
	Income from Continuing Operations	$	112.6		$	214.5		$	91.8
	Less Income from Continuing Operations Attributed to Participating Awards	0.5			1.1			0.5
	Income from Continuing Operations Attributed to Unrestricted Shares	112.1			213.4			91.3
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—			—			—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	112.1		$	213.4		$	91.3
	SHARES IN THOUSANDS
	Weighted-average Unrestricted Shares Outstanding	53,762.50			56,856.90			58,857.30
	Equity-based Compensation Equivalent Shares	105.4			126.7			141.7
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	53,867.90			56,983.60			58,999.00
	PER UNRESTRICTED SHARE IN WHOLE DOLLARS
	Basic Income from Continuing Operations Per Unrestricted Share	$	2.08		$	3.75		$	1.55
	Diluted Income from Continuing Operations Per Unrestricted Share	$	2.08		$	3.74		$	1.54
	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 years ended December 31, 2014, 2013 and 2012 because the exercise prices for the options exceeded the average market price is presented below.
	SHARES IN THOUSANDS	2014		2013			2012
	Equity-based Compensation Equivalent Shares	1,605.10		2,080.90			2,756.10
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,605.10		2,080.90			2,756.10

Other_Comprehensive_Income_And

Other Comprehensive Income And Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Other Comprehensive Income and Accumulated Other Comprehensive Income	NOTE 11. OTHER COMPREHENSIVE INCOME (LOSS) AND ACCUMULATED OTHER COMPREHENSIVE INCOME
	The components of Other Comprehensive Income (Loss) Before Income Taxes for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Year Before Reclassification Adjustment	$	259.7		$	(324.9	)	$	157.9
	Reclassification Adjustment for Amounts Included in Net Income	(25.1		)	(37.9		)	(61.2		)
	Unrealized Holding Gains (Losses)	234.6			(362.8		)	96.7
	Foreign Currency Translation Adjustments Arising During the Year Before Reclassification Adjustment	(1.0		)	0.2			1.6
	Reclassification Adjustment for Amounts Included in Net Income	—			—			—
	Foreign Currency Translation Adjustments	(1.0		)	0.2			1.6
	Net Unrecognized Postretirement Benefit Costs Arising During the Year	(106.4		)	61.6			(29.4		)
	Amortization of Net Unrecognized Postretirement Benefit Costs	7.9			25			16.2
	Net Unrecognized Postretirement Benefit Costs	(98.5		)	86.6			(13.2		)
	Other Comprehensive Income (Loss) Before Income Taxes	$	135.1		$	(276.0	)	$	85.1
	The components of Other Comprehensive Income Tax Benefit (Expense) for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Year Before Reclassification Adjustment	$	(91.6	)	$	115.9		$	(55.9	)
	Reclassification Adjustment for Amounts Included in Net Income	8.8			13.2			21.5
	Unrealized Holding Gains and Losses	(82.8		)	129.1			(34.4		)
	Foreign Currency Translation Adjustments Arising During the Year Before Reclassification Adjustment	0.4			(0.1		)	(0.6		)
	Reclassification Adjustment for Amounts Included in Net Income	—			—			—
	Foreign Currency Translation Adjustment	0.4			(0.1		)	(0.6		)
	Net Unrecognized Postretirement Benefit Costs Arising During the Year	37.5			(21.6		)	10.3
	Amortization of Net Unrecognized Postretirement Benefit Costs	(2.8		)	(8.8		)	(5.7		)
	Net Unrecognized Postretirement Benefit Costs	34.7			(30.4		)	4.6
	Other Comprehensive Income Tax Benefit (Expense)	$	(47.7	)	$	98.6		$	(30.4	)
	The components of AOCI at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	2.8		$	0.3
	Other Net Unrealized Gains on Investments	324.8			175.5
	Foreign Currency Translation Adjustments, Net of Income Taxes	0.2			0.8
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(105.1		)	(41.3		)
	Accumulated Other Comprehensive Income	$	222.7		$	135.3
	NOTE 11. OTHER COMPREHENSIVE INCOME (LOSS) AND ACCUMULATED OTHER COMPREHENSIVE INCOME (Continued)
	Components of AOCI were reclassified to the following lines of the Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012:
	DOLLARS IN MILLIONS	2014			2013			2012
	Reclassification of AOCI from Unrealized Gains and Losses on Available For Sale Securities to:
	Net Realized Gains on Sales of Investments	$	37.9		$	51.8		$	65
	Net Impairment Losses Recognized in Earnings	(12.8		)	(13.9		)	(3.8		)
	Total Before Income Taxes	25.1			37.9			61.2
	Income Tax Expense	(8.8		)	(13.2		)	(21.5		)
	Reclassification from AOCI, Net of Income Taxes	16.3			24.7			39.7
	Reclassification of AOCI from Amortization of Net Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(7.9		)	(25.0		)	(16.2		)
	Income Tax Benefit	2.8			8.8			5.7
	Reclassification from AOCI, Net of Income Taxes	(5.1		)	(16.2		)	(10.5		)
	Total Reclassification from AOCI to Net Income	$	11.2		$	8.5		$	29.2

Income_From_Investments

Income From Investments	12 Months Ended
	Dec. 31, 2014
Investment Income, Net [Abstract]
Income From Investments	NOTE 12. INCOME FROM INVESTMENTS
	Net Investment Income for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Investment Income (Loss):
	Interest and Dividends on Fixed Maturities	$	227.4		$	235.5		$	246.1
	Dividends on Equity Securities	59.9			38			25.7
	Equity Method Limited Liability Investments	9			26.4			9.3
	Fair Value Option Investments	(0.7		)	—			—
	Short-term Investments	0.6			0.1			0.2
	Real Estate	12.1			20.8			27.4
	Loans to Policyholders	20.5			19.8			18.9
	Other	0.1			—			0.1
	Total Investment Income	328.9			340.6			327.7
	Investment Expenses:
	Real Estate	11.3			18.3			26.1
	Other Investment Expenses	8.5			7.6			5.7
	Total Investment Expenses	19.8			25.9			31.8
	Net Investment Income	$	309.1		$	314.7		$	295.9
	Other Receivables includes accrued investment income of $65.5 million and $66.7 million at December 31, 2014 and 2013, respectively.
	NOTE 12. INCOME FROM INVESTMENTS (Continued)
	The components of Net Realized Gains on Sales of Investments for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Fixed Maturities:
	Gains on Sales	$	7		$	30.9		$	56.9
	Losses on Sales	(0.2		)	(0.4		)	(0.1		)
	Equity Securities:
	Gains on Sales	33.1			21.8			8.3
	Losses on Sales	(2.0		)	(0.5		)	(0.2		)
	Equity Method Limited Liability Investments:
	Gains on Sales	—			2.5			—
	Real Estate:
	Gains on Sales	—			44.2			0.2
	Losses on Sales	(0.2		)	—			—
	Other Investments:
	Gain on Sale of Subsidiary	1.6			—			—
	Gains on Other Sales	—			0.1			—
	Losses on Sales	(0.1		)	(0.1		)	—
	Net Gains (Losses) on Trading Securities	(0.1		)	0.6			0.3
	Net Realized Gains on Sales of Investments	$	39.1		$	99.1		$	65.4
	Gross Gains on Sales	$	41.7		$	99.5		$	65.4
	Gross Losses on Sales	(2.5		)	(1.0		)	(0.3		)
	Net Gains (Losses) on Trading Securities	(0.1		)	0.6			0.3
	Net Realized Gains on Sales of Investments	$	39.1		$	99.1		$	65.4
	The components of Net Impairment Losses Recognized in Earnings reported in the Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Fixed Maturities	$	(5.7	)	$	(10.3	)	$	(1.9	)
	Equity Securities	(7.1		)	(3.6		)	(1.9		)
	Real Estate	(2.4		)	—			(3.1		)
	Net Impairment Losses Recognized in Earnings	$	(15.2	)	$	(13.9	)	$	(6.9	)

Insurance_Expenses

Insurance Expenses	12 Months Ended
	Dec. 31, 2014
Insurance Expenses [Abstract]
Insurance Expenses	NOTE 13. INSURANCE EXPENSES
	Insurance Expenses for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Commissions	$	324.6		$	345.7		$	366.1
	General Expenses	258.1			257.1			262.9
	Taxes, Licenses and Fees	38.9			42.8			44.7
	Total Costs Incurred	621.6			645.6			673.7
	Policy Acquisition Costs:
	Deferred	(235.8		)	(253.4		)	(266.4		)
	Amortized	235.4			253.9			257
	Net Policy Acquisition Costs Amortized (Deferred)	(0.4		)	0.5			(9.4		)
	Life VIF and P&C Customer Relationships Amortized	7.2			8.3			8
	Insurance Expenses	$	628.4		$	654.4		$	672.3
	Commissions for servicing policies are expensed as incurred, rather than deferred and amortized.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 14. INCOME TAXES
	The components of Liabilities for Income Taxes at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Current Income Tax Liabilities	$	7.8		$	1.5
	Deferred Income Tax Liabilities	21.5			—
	Unrecognized Tax Benefits	7.2			6.8
	Liabilities for Income Taxes	$	36.5		$	8.3
	The tax effects of temporary differences that give rise to significant portions of the Company’s Net Deferred Income Tax Assets and Deferred Income Tax Liabilities at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Deferred Income Tax Assets:
	Insurance Reserves	$	78.7		$	76.4
	Unearned Premium Reserves	35.5			40.2
	Tax Capitalization of Policy Acquisition Costs	73			73.3
	Payroll and Employee Benefit Accruals	74			38.8
	Net Operating Loss Carryforwards	31.7			53.3
	Other	9.8			12.6
	Total Deferred Income Tax Assets	302.7			294.6
	Deferred Income Tax Liabilities:
	Investments	160.1			80
	Deferred Policy Acquisition Costs	106.1			106
	Life VIF and P&C Customer Relationships	17.7			20.2
	Goodwill and Licenses	28.4			26.8
	Depreciable Assets	7.4			26
	Other	4.5			3.8
	Total Deferred Income Tax Liabilities	324.2			262.8
	Net Deferred Income Tax Assets (Liabilities)	$	(21.5	)	$	31.8
	NOTE 14. INCOME TAXES (Continued)
	The expiration of federal net operating loss (“NOL”) carryforwards and their related deferred income tax assets is presented below by year of expiration.
	DOLLARS IN MILLIONS	NOL Carry-forwards			Deferred Tax Asset
	Expiring in:
	2020	$	8.1		$	2.8
	2021 through 2025	30.6			10.8
	2026 through 2030	29.8			10.4
	2031 through 2032	22			7.7
	Total All Years	$	90.5		$	31.7
	Except for the NOL carryforwards scheduled to expire in 2031 through 2032, all of the NOL carryforwards were acquired in connection with business acquisitions made in prior years and are subject to annual usage limitations under the Internal Revenue Code. The Company expects to fully utilize these federal NOL carryforwards.
	The Company has not provided for Federal income taxes on $14.7 million of Mutual Savings Life’s income earned prior to 1984 which is not subject to income taxes under certain circumstances. Federal income taxes of $5.1 million would be paid on such income if it is distributed to shareholders in the future or if it does not continue to meet certain limitations.
	A reconciliation of the beginning and ending amount of Unrecognized Tax Benefits for the years ended December 31, 2014, 2013 and 2012 is as follows:
	DOLLARS IN MILLIONS	2014			2013				2012
	Balance at Beginning of Year	$	6.8		$	6.4			$	6.2
	Additions for Tax Positions of Current Period	0.1			0.1				—
	Additions for Tax Positions of Prior Years	0.3			0.3				0.2
	Balance at End of Year	$	7.2		$	6.8			$	6.4
	The statute of limitations related to Kemper and its eligible subsidiaries’ consolidated Federal income tax returns is closed for all tax years up to and including 2006. The expiration of the statute of limitations related to the various state income tax returns that Kemper and its subsidiaries file varies by state.
	In July 2014, the Company extended the federal statute of limitations related to its 2007 through 2010 tax years to July 31, 2015. The extension was requested by the Internal Revenue Service (“IRS”) to provide them with additional time to prepare the necessary documentation for the Joint Committee of Taxation’s (“JCT”) review required by statute. The Company does not anticipate a material modification to the filed returns or the related refunds that have been received. It is reasonably possible that the amount of Unrecognized Tax Benefits could decrease by $3.5 million within the next 12 months of the reporting date because of the JCT finishing its review of the IRS’s report without change or the expiration of the statute of limitations referred to above.
	During the second quarter of 2014, the Illinois Department of Revenue finalized its examinations of the Company’s 2009 and 2010 tax returns with no material change in the Company’s tax liability.
	Unrecognized Tax Benefits at December 31, 2014, 2013 and 2012 include $3.4 million, $3.4 million and $3.5 million, respectively, for tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility. Because of the impact of deferred income tax accounting, other than for interest and penalties, the disallowance of the shorter deductibility period would not affect the effective income tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.
	The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in income tax expense. The liability for Unrecognized Tax Benefits included accrued interest of $3.8 million, $3.4 million and $2.9 million at December 31, 2014, 2013 and 2012, respectively. Tax expense includes interest expense of $0.4 million related to unrecognized tax benefits for each of the years ended December 31, 2014, 2013 and 2012.
	NOTE 14. INCOME TAXES (Continued)
	The components of Income Tax Expense from Continuing Operations for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013				2012
	Current Income Tax Expense	$	(41.7	)	$	(49.4	)		$	(43.3	)
	Deferred Income Tax Benefit (Expense)	(5.5		)	(50.1		)		12.9
	Increase Unrecognized Tax Benefits	(0.4		)	(0.4		)		(0.2		)
	Income Tax Expense	$	(47.6	)	$	(99.9	)		$	(30.6	)
	Net income taxes paid were $37.2 million, $42.4 million and $52.2 million in 2014, 2013 and 2012, respectively.
	A reconciliation of the Statutory Federal Income Tax Expense and Rate to the Company’s Effective Income Tax Expense and Rate from Continuing Operations for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014						2013						2012
		Amount			Rate			Amount				Rate		Amount			Rate
	Statutory Federal Income Tax Expense	$	(56.1	)	35	%		$	(110.0	)		35	%	$	(42.8	)	35	%
	Tax-exempt Income and Dividends Received Deduction	9			(5.6	)		10.6				(3.4	)	13.9			(11.4	)
	State Income Taxes	(0.6		)	0.4			(0.2		)		0.1		(0.8		)	0.7
	Other, Net	0.1			(0.1	)		(0.3		)		0.1		(0.9		)	0.7
	Effective Income Tax Expense from Continuing Operations	$	(47.6	)	29.7	%		$	(99.9	)		31.8	%	$	(30.6	)	25	%
Comprehensive Income Tax Expense included in the Consolidated Financial Statements for the years ended December 31, 2014, 2013 and 2012 was:
DOLLARS IN MILLIONS	2014			2013				2012
Income Tax Expense:
Continuing Operations	$	(47.6	)	$	(99.9	)		$	(30.6	)
Discontinued Operations	(1.1		)	(1.7		)		(7.3		)
Unrealized Depreciation (Appreciation) on Securities	(82.8		)	129.1				(34.4		)
Foreign Currency Translation Adjustments on Investments	0.4			(0.1		)		(0.6		)
Tax Effects from Postretirement Benefit Plans	34.7			(30.4		)		4.6
Tax Effects from Long-term Equity-based Compensation included in Paid-in Capital	(1.0		)	0.2				(0.1		)
Comprehensive Income Tax Expense	$	(97.4	)	$	(2.8	)		$	(68.4	)

Pension_Benefits

Pension Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Pension Benefits	NOTE 15. PENSION BENEFITS
	The Company sponsors a qualified defined benefit pension plan (the “Pension Plan”). The Pension Plan covers approximately 9,500 participants and beneficiaries, of which 2,200 are active employees. The Pension Plan is closed to new employees hired after January 1, 2006. The Pension Plan is generally non-contributory, but participation requires or required some employees to contribute 3% of pay, as defined, per year. Benefits for participants who are or were required to contribute to the Pension Plan are based on compensation during plan participation and the number of years of participation. Benefits for the vast majority of participants who are not required to contribute to the Pension Plan are based on years of service and final average pay, as defined. The Company funds the Pension Plan in accordance with the requirements of ERISA.
	NOTE 15. PENSION BENEFITS (Continued)
	Changes in Fair Value of Plan Assets and Changes in Projected Benefit Obligation for the Pension Plan for the years ended December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS
		2014				2013
	Fair Value of Plan Assets at Beginning of Year	$	524.5			$	457.6
	Actual Return on Plan Assets	41.7				34.5
	Employer Contributions	—				55
	Benefits Paid	(23.2		)		(22.6		)
	Fair Value of Plan Assets at End of Year	543				524.5
	Projected Benefit Obligation at Beginning of Year	515.5				553.9
	Service Cost	8.7				10.8
	Interest Cost	24.8				22.4
	Benefits Paid	(23.2		)		(22.6		)
	Plan Amendments	(0.6		)		—
	Actuarial Losses (Gains)	108.8				(49.0		)
	Projected Benefit Obligation at End of Year	634				515.5
	Funded Status—Plan Assets in Excess (Deficit) of Projected Benefit Obligation	$	(91.0	)		$	9
	Unamortized Amount Reported in AOCI at End of Year:
	Accumulated Actuarial Loss	$	(178.6	)		$	(86.3	)
	Prior Service Credit	0.5				—
	Unamortized Amount Reported in AOCI at End of Year	$	(178.1	)		$	(86.3	)
	Accumulated Benefit Obligation at End of Year	$	608.2			$	496.2
	The measurement dates of the assets and liabilities at end of year presented in the preceding table under the headings, “2014” and “2013” were December 31, 2014 and December 31, 2013, respectively.
	The weighted-average discount rate and rate of increase in future compensation levels used to estimate the components of the Projected Benefit Obligation for the Pension Plan at December 31, 2014 and 2013 were:
		2014			2013
	Discount Rate	4.1	%		4.9	%
	Rate of Increase in Future Compensation Levels	3.31			3.05
	Weighted-average asset allocations for the Pension Plan at December 31, 2014 and 2013 by asset category were:
	ASSET CATEGORY	2014			2013
	Cash and Short-term Investments	4	%		8	%
	Corporate Bonds and Notes	29			27
	Common and Preferred Stocks	43			34
	Exchange Traded Funds	12			22
	Other Assets	12			9
	Total	100	%		100	%
	The investment objective of the Pension Plan is to produce current income and long-term capital growth through a combination of equity and fixed income investments which, together with appropriate employer contributions and any required employee contributions, is adequate to provide for the payment of the benefit obligations of the Pension Plan. The assets of the Pension Plan may be invested in fixed income and equity investments or any other investment vehicle or financial instrument deemed appropriate. Fixed income investments may include cash and short-term instruments, U.S. Government securities, corporate bonds, mortgages and other fixed income investments. Equity investments may include various types of stock, such as large-cap, mid-cap and small-cap stocks, and may also include investments in investment companies, collective investment funds and
	NOTE 15. PENSION BENEFITS (Continued)
	Kemper common stock (subject to Section 407 and other requirements of ERISA). The Pension Plan has not invested in Kemper common stock.
	The trust investment committee for the Pension Plan, along with its third party fiduciary advisor, periodically reviews the performance of the Pension Plan’s investments and asset allocation. Several external investment managers, one of which is Fayez Sarofim & Co. (see Note 23, “Related Parties,” to the Consolidated Financial Statements), manage the equity investments of the trust for the Pension Plan. Each manager is allowed to exercise investment discretion, subject to limitations, if any, established by the trust investment committee for the Pension Plan. All other investment decisions are made by the Company, subject to general guidelines as set by the trust investment committee for the Pension Plan.
	The Company determines its Expected Long Term Rate of Return on Plan Assets based primarily on the Company’s expectations of future returns, with consideration to historical returns, for the Pension Plan’s investments, based on target allocations of the Pension Plan’s investments.
	Fair value measurements for the Pension Plan’s assets at December 31, 2014 are summarized below:
	DOLLARS IN MILLIONS	Quoted Prices				Significant				Significant			Fair Value
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	18.4			$	—			$	—		$	18.4
	States and Political Subdivisions	—				3.3				—			3.3
	Corporate Bonds and Notes	—				136.6				—			136.6
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				6.4				—			6.4
	Common Stocks:
	Manufacturing	98.8				15				—			113.8
	Other Industries	79.3				2.3				—			81.6
	Other Equity Interests:
	Collective Investment Funds	—				30				—			30
	Exchange Traded Funds	65.5				—				—			65.5
	Limited Liability Companies and Limited Partnerships	—				—				64.5			64.5
	Short-term Investments	21.5				—				—			21.5
	Receivables and Other	1				—				0.4			1.4
Total	$	284.5			$	193.6			$	64.9		$	543
Additional information pertaining to the changes in the fair value of the Pension Plan’s assets classified as Level 3 for the year ended December 31, 2014 is presented below:
DOLLARS IN MILLIONS	Other Equity				Receivables				Total
	Interests				and Other
Balance at Beginning of Year	$	46.9			$	0.5			$	47.4
Return on Plan Assets Held	3.4				—				3.4
Purchases, Sales and Settlements, Net	14.2				(0.1		)		14.1
Balance at End of Year	$	64.5			$	0.4			$	64.9
NOTE 15. PENSION BENEFITS (Continued)
Fair value measurements for the Pension Plan’s assets at December 31, 2013 are summarized below:
DOLLARS IN MILLIONS	Quoted Prices				Significant				Significant			Fair Value
	in Active Markets				Other				Unobservable
	for Identical				Observable				Inputs
	Assets				Inputs				(Level 3)
	(Level 1)				(Level 2)
Fixed Maturities:
U.S. Government and Government Agencies and Authorities	$	12.1			$	—			$	—		$	12.1
States and Political Subdivisions	—				3.1				—			3.1
Corporate Bonds and Notes	—				127				—			127
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate	—				4				—			4
Common Stocks:
Manufacturing	97.5				7.8				—			105.3
Other Industries	67.2				1.8				—			69
Other Equity Interests:
Exchange Traded Funds	111.7				—				—			111.7
Limited Liability Companies and Limited Partnerships	—				—				46.9			46.9
Short-term Investments	42.6				—				—			42.6
Receivables and Other	2.3				—				0.5			2.8
Total	$	333.4			$	143.7			$	47.4		$	524.5
Additional information pertaining to the changes in the fair value of the Pension Plan’s assets classified as Level 3 for the year ended December 31, 2013 is presented below:
DOLLARS IN MILLIONS	Other Equity				Receivables				Total
	Interests				and Other
Balance at Beginning of Year	$	26.9			$	0.6			$	27.5
Return on Plan Assets Held	3.5				—				3.5
Purchases, Sales and Settlements, Net	16.5				(0.1		)		16.4
Balance at End of Year	$	46.9			$	0.5			$	47.4
The components of Comprehensive Pension Expense (Income) for the Pension Plan for the years ended December 31, 2014, 2013 and 2012 were:
DOLLARS IN MILLIONS	2014				2013				2012
Service Cost Earned During the Year	$	8.7			$	10.8			$	10.8
Interest Cost on Projected Benefit Obligation	24.8				22.4				22.4
Expected Return on Plan Assets	(34.9		)		(29.7		)		(29.8		)
Amortization of Actuarial Loss	9.7				26.2				18.8
Settlements	—				—				0.3
Pension Expense Recognized in Consolidated Statements of Income	8.3				29.7				22.5
Unrecognized Pension Loss (Gain) Arising During the Year	102				(53.8		)		34.8
Prior Service Credit Arising During the Year	(0.6		)		—				—
Amortization of Accumulated Unrecognized Pension Loss	(9.7		)		(26.2		)		(18.8		)
Comprehensive Pension Expense (Income)	$	100			$	(50.3	)		$	38.5
NOTE 15. PENSION BENEFITS (Continued)
The Company estimates that Pension Expense for the Pension Plan for the year ended December 31, 2015 will include expense of $23.0 million resulting from the amortization of the related accumulated actuarial loss included in AOCI at December 31, 2014.
Total Pension Expense Recognized in the Consolidated Statements of Income as presented in the preceding table includes service cost benefits earned and reported in discontinued operations of $0.5 million for the year ended December 31, 2012.
The weighted-average discount rate, rate of increase in future compensation levels and expected long-term rate of return on plan assets used to develop the components of Pension Expense for the Pension Plan for the years ended December 31, 2014, 2013 and 2012 were:
	2014			2013			2012
Discount Rate	4.9	%		4.05	%		4.6	%
Rate of Increase in Future Compensation Levels	3.05			3.08			3.27
Expected Long Term Rate of Return on Plan Assets	7			7			7
On September 3, 2013, the Company made a voluntary cash contribution of $55.0 million to the Pension Plan. The Company did not contribute to the Pension Plan in 2014 or 2012. The Company does not expect that it will be required to contribute to the Pension Plan in 2015, but could make a voluntary contribution pursuant to the maximum funding limits under ERISA.
The following benefit payments (net of participant contributions), which consider expected future service, as appropriate, are expected to be paid from the Pension Plan:
DOLLARS IN MILLIONS	Years Ending December 31,
	2015				2016				2017			2018		2019		2020-2024
Estimated Pension Benefit Payments	$	25.2			$	26.5			$	27.8		$	29.2	$	30.4	$	169.6
The Company also sponsors a non-qualified supplemental defined benefit pension plan (the “Supplemental Plan”). The unfunded liability related to the Supplemental Plan was $31.0 million and $23.3 million at December 31, 2014 and 2013, respectively. Pension expense for the Supplemental Plan was $1.8 million, $1.8 million and $1.8 million for the years ended December 31, 2014, 2013 and 2012, respectively. An actuarial loss of $7.0 million before taxes, an actuarial gain of $1.5 million before taxes and an actuarial loss of $1.3 million before taxes are included in Other Comprehensive Income (Loss) for the years ended December 31, 2014, 2013 and 2012, respectively.
The Company also sponsors several defined contribution benefit plans covering most of its employees. The Company made contributions to those plans of $7.3 million, $7.3 million and $7.8 million in 2014, 2013 and 2012, respectively.

Postretirement_Benefits_Other_

Postretirement Benefits Other Than Pensions (Other Postretirement Benefit Plan, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2014
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postemployment Benefits Other Than Pensions	NOTE 16. POSTRETIREMENT BENEFITS OTHER THAN PENSIONS
	The Company sponsors an other than pension postretirement employee benefit plan (“OPEB”) that provides medical, dental and/or life insurance benefits to approximately 500 retired and 300 active employees (the “OPEB Plan”). The Company generally is self-insured for the benefits under the OPEB Plan. The medical plan generally provides for a limited number of years of medical insurance benefits at retirement based on the participant’s attained age at retirement and number of years of service until specified dates and generally requires participant contributions, with most contributions adjusted annually.
	Changes in Fair Value of Plan Assets and Changes in Accumulated Postretirement Benefit Obligation for the years ended December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS
		2014				2013
	Fair Value of Plan Assets at Beginning of Year	$	—			$	—
	Employer Contributions	3.4				2.9
	Plan Participants’ Contributions	1.2				1.2
	Benefits Paid	(4.6		)		(4.1		)
	Fair Value of Plan Assets at End of Year	—				—
	Accumulated Postretirement Benefit Obligation at Beginning of Year	35.1				42.8
	Service Cost	0.2				0.2
	Interest Cost	1.1				1.2
	Plan Participants’ Contributions	1.2				1.2
	Benefits Paid	(4.6		)		(4.1		)
	Medicare Part D Subsidy Received	0.1				—
	Actuarial Gains	(2.0		)		(6.2		)
	Accumulated Postretirement Benefit Obligation at End of Year	31.1				35.1
	Funded Status—Accumulated Postretirement Benefit Obligation in Excess of Plan Assets	$	(31.1	)		$	(35.1	)
	Unamortized Actuarial Gain Reported in AOCI at End of Year	$	18.6			$	18.4
	The measurement dates of the assets and liabilities at end of year in the preceding table under the headings “2014” and “2013” were December 31, 2014 and December 31, 2013, respectively.
	The weighted-average discount rate and rate of increase in future compensation levels used to develop the components of the Accumulated Postretirement Benefit Obligation at December 31, 2014 and 2013 were:
		2014			2013
	Discount Rate	3.4	%		4	%
	Rate of Increase in Future Compensation Levels	2.68			2.1
	The assumed health care cost trend rate used in measuring the Accumulated Postretirement Benefit Obligation at December 31, 2014 was 8.0% for 2015, gradually declining to 5.0% in the year 2023 and remaining at that level thereafter for medical benefits and 7.5% for 2015, gradually declining to 5.0% in the year 2023 and remaining at that level thereafter for prescription drug benefits. The assumed health care cost trend rate used in measuring the Accumulated Postretirement Benefit Obligation at December 31, 2013 was 8.5% for 2014, gradually declining to 5.0% in the year 2021 and remaining at that level thereafter for medical benefits and 8.0% for 2014, gradually declining to 5.0% in the year 2022 and remaining at that level thereafter for prescription drug benefits.
	A one-percentage point increase in the assumed health care cost trend rate for each year would have increased the Accumulated Postretirement Benefit Obligation at December 31, 2014 by $1.7 million and 2014 OPEB expense by $0.1 million. A one-percentage point increase in the assumed health care cost trend rate for each year would have increased the Accumulated Postretirement Benefit Obligation at December 31, 2013 by $2.1 million and 2013 OPEB expense by $0.1 million.
	NOTE 16. POSTRETIREMENT BENEFITS OTHER THAN PENSIONS (Continued)
	The components of Comprehensive OPEB Income for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014				2013				2012
	Service Cost Earned During the Year	$	0.2			$	0.2			$	0.2
	Interest Cost on Accumulated Postretirement Benefit Obligation	1.1				1.2				1.6
	Amortization of Actuarial Gain	(1.8		)		(1.2		)		(1.2		)
	OPEB Expense (Income) Recognized in Consolidated Statements of Income	(0.5		)		0.2				0.6
	Unrecognized OPEB Gain Arising During the Year	(2.0		)		(6.2		)		(5.5		)
	Amortization of Accumulated Unrecognized OPEB Gain	1.8				1.2				1.2
	Comprehensive OPEB Income	$	(0.7	)		$	(4.8	)		$	(3.7	)
	The Company estimates that OPEB Expense for the year ended December 31, 2015 will include income of $1.5 million resulting from the amortization of the related accumulated actuarial gain included in AOCI at December 31, 2014.
	The weighted-average discount rate and rate of increase in future compensation levels used to develop OPEB Expense for the years ended December 31, 2014, 2013 and 2012 were:
		2014			2013			2012
	Discount Rate	4	%		3.15	%		4.25	%
	Rate of Increase in Future Compensation Levels	2.1			2.1			2.1
	The Company expects to contribute $3.2 million, net of the expected Medicare Part D subsidy, to its OPEB Plan to fund benefit payments in 2015.
	The following benefit payments (net of participant contributions), which consider expected future service, as appropriate, are expected to be paid:
	DOLLARS IN MILLIONS	Years Ending December 31,
		2015				2016				2017			2018			2019			2020-2024
	Estimated Benefit Payments:
	Excluding Medicare Part D Subsidy	$	3.6			$	3.7			$	3.6		$	3.5		$	3.4		$	13.8
	Expected Medicare Part D Subsidy	(0.4		)		(0.4		)		(0.4		)	(0.4		)	(0.4		)	(1.6		)
	Net Estimated Benefit Payments	$	3.2			$	3.3			$	3.2		$	3.1		$	3		$	12.2

Business_Segments

Business Segments	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Business Segments	NOTE 17. 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 risks, homeowners insurance, other personal insurance and commercial automobile insurance. These products are primarily distributed through independent agents, employer-sponsored voluntary benefit programs and other affinity relationships. The Life & Health Insurance segment’s principal products are individual life, accident, health and property insurance. These products are distributed by career agents employed by the Company as well as exclusive and non-exclusive independent agents and brokers.
	The Company’s earned premiums are derived in the United States. The accounting policies of the segments are the same as those described in Note 2, “Summary of Accounting Policies and Accounting Changes,” to the Consolidated Financial Statements. Capital expenditures for long-lived assets by operating segment are immaterial.
	It is the Company’s management practice to allocate certain corporate expenses, primarily compensation costs for corporate employees and related facility costs, included in Interest and Other Expenses in the Consolidated Statements of Income to its insurance operations. The amount of such allocated corporate expenses was $42.1 million, $39.7 million and $31.7 million for
	NOTE 17. BUSINESS SEGMENTS (Continued)
	the years ended December 31, 2014, 2013 and 2012, respectively. The Company does not allocate Net Realized Gains on Sales of Investments, Net Impairment Losses Recognized in Earnings, interest expense on debt or postretirement benefit plans, and actuarial gains and losses on its postretirement benefit plans to its operating segments.
	Segment Assets at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Property & Casualty Insurance	$	2,486.10		$	2,648.60
	Life & Health Insurance	4,810.60			4,545.60
	Corporate and Other, Net	536.7			462.2
	Total Assets	$	7,833.40		$	7,656.40
	Earned Premiums by product line for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Personal Automobile	$	831.4		$	959.1		$	1,050.10
	Homeowners	312.4			326.2			318
	Other Personal Property and Casualty Insurance	127.4			134.1			136.9
	Commercial Automobile	54.8			52.3			43.5
	Life	387.6			392.7			393.4
	Accident and Health	148.6			161.4			165.2
	Total Earned Premiums	$	1,862.20		$	2,025.80		$	2,107.10
	Segment Revenues, including a reconciliation to Total Revenues, for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	1,249.50		$	1,392.90		$	1,467.20
	Net Investment Income	72.7			90.9			77.9
	Other Income	0.5			0.5			0.7
	Total Property & Casualty Insurance	1,322.70			1,484.30			1,545.80
	Life & Health Insurance:
	Earned Premiums	612.7			632.9			639.9
	Net Investment Income	218.7			209.9			204.3
	Other Income	0.9			0.2			0.1
	Total Life & Health Insurance	832.3			843			844.3
	Total Segment Revenues	2,155.00			2,327.30			2,390.10
	Net Realized Gains on the Sales of Investments	39.1			99.1			65.4
	Net Impairment Losses Recognized in Earnings	(15.2		)	(13.9		)	(6.9		)
	Other	17.7			14			13.7
	Total Revenues	$	2,196.60		$	2,426.50		$	2,462.30
	NOTE 17. BUSINESS SEGMENTS (Continued)
	Segment Operating Profit (Loss), including a reconciliation to Income from Continuing Operations before Income Taxes, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Operating Profit (Loss):
	Property & Casualty Insurance	$	27.1		$	139.6		$	(35.6	)
	Life & Health Insurance	141.9			136.9			140.4
	Total Segment Operating Profit	169			276.5			104.8
	Corporate and Other Operating Loss	(32.7		)	(47.3		)	(40.9		)
	Total Operating Profit	136.3			229.2			63.9
	Net Realized Gains on Sales of Investments	39.1			99.1			65.4
	Net Impairment Losses Recognized in Earnings	(15.2		)	(13.9		)	(6.9		)
	Income from Continuing Operations before Income Taxes	$	160.2		$	314.4		$	122.4
	Segment Net Operating Income (Loss), including a reconciliation to Income from Continuing Operations, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Net Operating Income (Loss):
	Property & Casualty Insurance	$	24.9		$	100.6		$	(10.9	)
	Life & Health Insurance	91.8			89.3			90.8
	Total Segment Net Operating Income	116.7			189.9			79.9
	Corporate and Other Net Operating Loss	(19.6		)	(30.7		)	(26.1		)
	Consolidated Net Operating Income	97.1			159.2			53.8
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	25.4			64.4			42.5
	Net Impairment Losses Recognized in Earnings	(9.9		)	(9.1		)	(4.5		)
	Income from Continuing Operations	$	112.6		$	214.5		$	91.8
Amortization of Deferred Policy Acquisition Costs by Operating Segment for the years ended December 31, 2014, 2013 and 2012 was:
DOLLARS IN MILLIONS	2014			2013			2012
Property & Casualty Insurance	$	187.5		$	207.2		$	212.6
Life & Health Insurance	47.9			46.7			44.4
Total Amortization	$	235.4		$	253.9		$	257

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	NOTE 18. DISCONTINUED OPERATIONS
	The Company accounts for its former consumer finance business and its former Unitrin Business Insurance operations as discontinued operations.
	Summary financial information included in Income from Discontinued Operations for the years ended December 31, 2014, 2013 and 2012 is presented below.
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	2014			2013			2012
	Income (Loss) from Discontinued Operations before Income Taxes:
	Results of Operations	$	—		$	—		$	(0.2	)
	Gain on Sale of Loan Portfolio	—			—			12.9
	Change in Estimate of Retained Liabilities Arising from Discontinued Operations	3			4.9			6.2
	Income from Discontinued Operations before Income Taxes	3			4.9			18.9
	Income Tax Expense	(1.1		)	(1.7		)	(7.3		)
	Income from Discontinued Operations	$	1.9		$	3.2		$	11.6
	Income from Discontinued Operations Per Unrestricted Share:
	Basic	$	0.04		$	0.06		$	0.2
	Diluted	$	0.04		$	0.06		$	0.2
	In 2012 the Company’s former consumer finance business sold its inactive loan portfolio at a gain of $12.9 million, net of transaction, shutdown and other costs.
	In 2008, the Company sold its Unitrin Business Insurance operations. The Company retained Property and Casualty Insurance Reserves for unpaid insured losses that occurred prior to the date of the sale. Property and Casualty Insurance Reserves reported in the Company’s Consolidated Balance Sheets include $69.3 million and $82.0 million at December 31, 2014 and 2013, respectively, for the retained liabilities. In accordance with GAAP, changes in the Company’s estimate of such retained liabilities after the sale are reported as a separate component of the results of discontinued operations. See Note 5, “Property and Casualty Insurance Reserves,” to the Consolidated Financial Statements.

Catastrophe_Reinsurance

Catastrophe Reinsurance	12 Months Ended
	Dec. 31, 2014
Reinsurance Disclosures [Abstract]
Catastrophe Reinsurance	NOTE 19. CATASTROPHE REINSURANCE
	Catastrophes and natural disasters are inherent risks of the property and casualty insurance business. These catastrophic events and natural disasters include, without limitation, hurricanes, tornadoes, earthquakes, hailstorms, wildfires, high winds and winter storms. Such events result in insured losses that are, and will continue to be, a material factor in the results of operations and financial position of the Company’s property and casualty insurance companies. Further, because the level of these insured losses occurring in any one year cannot be accurately predicted, these losses may contribute to material year-to-year fluctuations in the results of operations and financial position of these companies. Specific types of catastrophic events are more likely to occur at certain times within the year than others. This factor adds an element of seasonality to property and casualty insurance claims. The Company has adopted the industry-wide catastrophe classifications of storms and other events promulgated by ISO to track and report losses related to catastrophes. ISO classifies a disaster as a catastrophe when the event causes $25.0 million or more in direct insured losses to property and affects a significant number of policyholders and insurers. ISO-classified catastrophes are assigned a unique serial number recognized throughout the insurance industry. The discussions that follow utilize ISO’s definition of catastrophes.
	The Company manages its exposure to catastrophes and other natural disasters through a combination of geographical diversification, restrictions on the amount and location of new business production in certain regions, and reinsurance. To limit its exposures to catastrophic events, the Company maintains various catastrophe reinsurance programs for its property and casualty insurance businesses.
	NOTE 19. CATASTROPHE REINSURANCE (Continued)
	Coverage for the Property & Casualty Insurance segment’s primary catastrophe reinsurance program effective January 1, 2014 to December 31, 2014 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Property & Casualty Insurance Segment:
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		95
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		400		95
	The Company’s catastrophe reinsurance in 2014 also included reinsurance coverage for both the Property & Casualty Insurance and Life & Health Insurance segments from the FHCF for hurricane losses in Florida at retentions lower than those described above.
	Coverage for the Property & Casualty Insurance segment’s primary catastrophe reinsurance program effective January 1, 2013 to December 31, 2013 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		65
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		350		90
	4th Layer of Coverage	350		450		50
	The catastrophe reinsurance program for the Property & Casualty Insurance segment in 2013 also included reinsurance coverage, under a policy that expired on June 1, 2013, for catastrophe losses in North Carolina at retentions lower than those presented in the preceding table. The Company’s catastrophe reinsurance in 2013 also included reinsurance coverage for both the Property & Casualty Insurance and Life & Health Insurance segments from the FHCF for hurricane losses in Florida at retentions lower than those described above.
	Coverage for the Company’s primary catastrophe reinsurance program effective January 1, 2012 to December 31, 2012 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Property & Casualty Insurance Segment:
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		65
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		350		90
	4th Layer of Coverage	350		450		50
	Life & Health Segment—Property Insurance Operations:
	Retained	$	—	$	8	—	%
	1st Layer of Coverage	8		15		70
	2nd Layer of Coverage	15		40		70
	NOTE 19. CATASTROPHE REINSURANCE (Continued)
	The catastrophe reinsurance program for the Property & Casualty Insurance segment in 2012 also included reinsurance coverage for catastrophe losses in North Carolina at retentions lower than those presented in the preceding table. The Company’s catastrophe reinsurance in 2012 also included reinsurance coverage for both the Property & Casualty Insurance and Life & Health Insurance segments from the FHCF for hurricane losses in Florida at retentions lower than those described above.
	In the event that the Company’s incurred catastrophe losses and LAE covered by any of its catastrophe reinsurance programs presented in the three preceding tables exceed the retention for that particular layer, each of the programs required one reinstatement of such coverage. In such an instance, the Company is required to pay a reinstatement premium to the reinsurers to reinstate the full amount of reinsurance available under such layer. The reinstatement premium is a percentage of the original premium based on the ratio of the losses in excess of the Company’s retention to the reinsurers’ coverage limit.
	Reinsurance premiums for the Company’s primary catastrophe reinsurance programs, the NC Program and the FHCF Program reduced earned premiums for the years ended December 31, 2014, 2013 and 2012 by the following:
	DOLLARS IN MILLIONS	2014		2013		2012
	Property & Casualty Insurance	$	17.6	$	23.6	$	25.1
	Life & Health Insurance	0.1		—		2
	Total Ceded Catastrophe Reinsurance Premiums	$	17.7	$	23.6	$	27.1
	Catastrophe losses and LAE (including reserve development), net of reinsurance recoveries, for the years ended December 31, 2014, 2013 and 2012 by business segment are presented below.
	DOLLARS IN MILLIONS	2014		2013		2012
	Property & Casualty Insurance	$	80.7	$	34.6	$	112.1
	Life & Health Insurance	3.1		1.6		6.1
	Total Catastrophe Losses and LAE	$	83.8	$	36.2	$	118.2
	Total catastrophe loss and LAE reserves, net of reinsurance recoverables, developed favorably by $14.7 million, $14.5 million and $6.3 million in 2014, 2013 and 2012, respectively. The Property & Casualty Insurance segment reported favorable catastrophe reserve development of $15.8 million, $12.5 million and $6.4 million in 2014, 2013 and 2012, respectively. The Life & Health Insurance segment reported adverse catastrophe reserve development of $1.1 million in 2014, favorable catastrophe reserve development of $2.0 million in 2013 and adverse catastrophe reserve development of $0.1 million in 2012.
	In late October 2012, Superstorm Sandy, at one point a level two hurricane while over the Atlantic Ocean, caused a significant amount of damage in several northeastern states. Catastrophe losses and LAE for the year ended December 31, 2012 include $48.5 million related to Superstorm Sandy.
	The process of estimating and establishing reserves for catastrophe losses is inherently uncertain and the actual ultimate cost of a claim, net of actual reinsurance recoveries, may vary materially from the estimated amount reserved. The Company’s estimates of direct catastrophe losses are generally based on inspections by claims adjusters and historical loss development experience for areas that have not been inspected or for claims that have not yet been reported. The Company’s estimates of direct catastrophe losses are based on the coverages provided by its insurance policies. The Company’s homeowners and dwelling insurance policies do not provide coverage for losses caused by floods, but generally provide coverage for physical damage caused by wind or wind-driven rain. Accordingly, the Company’s estimates of direct losses for homeowners and dwelling insurance do not include losses caused by flood. Depending on the policy, automobile insurance may provide coverage for losses caused by flood. Estimates of the number and severity of claims ultimately reported are influenced by many variables, including, but not limited to, repair or reconstruction costs and determination of cause of loss that are difficult to quantify and will influence the final amount of claim settlements. All these factors, coupled with the impact of the availability of labor and material on costs, require significant judgment in the reserve setting process. A change in any one or more of these factors is likely to result in an ultimate net claim cost different from the estimated reserve. The Company’s estimates of indirect losses from wind pools and joint underwriting associations are based on a variety of factors, including, but not limited to, actual or estimated assessments provided by or received from such entities, insurance industry estimates of losses, and estimates of the Company’s market share in the assessable states. Actual assessments may differ materially from these estimated amounts.

Other_Reinsurance

Other Reinsurance	12 Months Ended
	Dec. 31, 2014
Reinsurance Disclosures [Abstract]
Other Reinsurance	NOTE 20. OTHER REINSURANCE
	In addition to the reinsurance programs described in Note 19, “Catastrophe Reinsurance,” to the Consolidated Financial Statements, Kemper’s insurance subsidiaries utilize other reinsurance arrangements to limit their maximum loss, provide greater diversification of risk and to minimize exposures on larger risks. The ceding of insurance does not discharge the primary liability of the original insurer. Accordingly, insurance reserve liabilities are reported gross of any estimated recovery from reinsurers in the Consolidated Balance Sheets. Amounts recoverable from reinsurers are estimated in a manner consistent with the insurance reserve liability and are included in Other Receivables in the Consolidated Balance Sheets.
	Earned Premiums ceded on long-duration and short-duration policies were $26.0 million, $33.9 million and $42.5 million for the years ended December 31, 2014, 2013 and 2012, respectively, of which $17.7 million, $23.6 million and $27.1 million, respectively, was related to catastrophe reinsurance. See Note 19, “Catastrophe Reinsurance,” to the Consolidated Financial Statements for additional information regarding the Company’s catastrophe reinsurance programs. Certain insurance subsidiaries assume business from other insurance companies and involuntary pools. Earned Premiums assumed on long-duration and short-duration policies were $57.1 million, $52.7 million and $44.0 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Trinity and Capitol are parties to a quota share reinsurance agreement whereby Trinity assumes 100% of the business written by Capitol, subject to a cap, effective April 1, 2012, for ceded losses for dwelling coverage. Earned Premiums assumed by Trinity from Capitol were $21.9 million, $22.4 million and $25.0 million for the years ended December 31, 2014, 2013 and 2012, respectively. Capitol is a mutual insurance company and, accordingly, is owned by its policyholders. Trinity and ORCC, a subsidiary of Capitol, are parties to a quota share reinsurance agreement whereby Trinity assumes 100% of the business written by ORCC, subject to a cap, effective January 1, 2013, for ceded losses for dwelling coverage. Earned Premiums assumed by Trinity from ORCC were $6.7 million, $7.2 million and $8.2 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Five employees of the Company serve as directors of Capitol’s five member board of directors. Nine employees of the Company also serve as directors of ORCC’s nine member board of directors. Kemper’s subsidiary, United Insurance, provides claims and administrative services to Capitol and ORCC. In addition, agents appointed by Kemper’s subsidiary, The Reliable Life Insurance Company, and who are employed by United Insurance, are also appointed by Capitol and ORCC to sell property insurance products for the Company’s Life & Health Insurance segment. The Company also provides certain investment services to Capitol and ORCC.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures	NOTE 21. FAIR VALUE MEASUREMENTS
	The Company classifies its Investments in Fixed Maturities and Equity Securities as available for sale and reports these investments at fair value. The Company classifies certain investments in mutual funds included in Other Investments as trading securities and reports these investments at fair value. The Company has no material liabilities that are measured and reported at fair value.
	The valuation of assets measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2014 is summarized below:
	DOLLARS IN MILLIONS	Fair Value Measurements											Fair Value
		Quoted Prices				Significant				Significant
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	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
	At December 31, 2014, the Company had unfunded commitments to invest an additional $97.9 million in certain limited liability investment companies and limited partnerships that will be included in Other Equity Interests when funded.
	NOTE 21. FAIR VALUE MEASUREMENTS (Continued)
	The valuation of assets measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2013 is summarized below:
	DOLLARS IN MILLIONS	Fair Value Measurements											Fair Value
		Quoted Prices				Significant				Significant
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	121.2			$	241			$	—		$	362.2
	States and Political Subdivisions	—				1,361.00				—			1,361.00
	Corporate Securities:
	Bonds and Notes	—				2,429.60				364.1			2,793.70
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				44.7			44.7
	Other Mortgage- and Asset-backed	—				1.5				4.5			6
	Total Investments in Fixed Maturities	121.2				4,033.10				420.7			4,575.00
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				80.8				5			85.8
	Other Industries	—				10.5				13.9			24.4
	Common Stocks:
	Manufacturing	95.1				7.3				2.2			104.6
	Other Industries	71.7				2.2				11			84.9
	Other Equity Interests:
	Exchange Traded Funds	124.9				—				—			124.9
	Limited Liability Companies and Limited Partnerships	—				—				173.9			173.9
	Total Investments in Equity Securities	291.7				100.8				206			598.5
	Other Investments:
Trading Securities	5				—				—			5
Total	$	417.9			$	4,133.90			$	626.7		$	5,178.50
The Company’s investments in Fixed Maturities that are classified as Level 1 in the two preceding tables primarily consist of U.S. Treasury Bonds and Notes. The Company’s investments in Equity Securities that are classified as Level 1 in the two preceding tables consist of either investments in publicly-traded common stocks or exchange traded funds. The Company’s investments in Fixed Maturities that are classified as Level 2 in the two preceding tables primarily consist of investments in corporate bonds, obligations of states and political subdivisions, and bonds and mortgage-backed securities of U.S. government agencies. The Company’s investments in Equity Securities that are classified as Level 2 in the two preceding tables primarily consist of investments in preferred stocks. The Company uses a leading, nationally recognized provider of market data and analytics to price the vast majority of the Company’s Level 2 measurements. The provider utilizes evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information. Because many fixed maturity securities do not trade on a daily basis, the provider’s evaluated pricing applications apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing to prepare evaluations. In addition, the provider uses model processes to develop prepayment and interest rate scenarios. The pricing provider’s models and processes also take into account market convention. For each asset class, teams of its evaluators gather information from market sources and integrate relevant credit information, perceived market movements and sector news into the evaluated pricing applications and models. The Company generally validates the measurements obtained from its primary pricing provider by comparing them with measurements obtained from one additional pricing provider that provides either prices from recent market transactions or quotes in inactive markets or evaluations based on its own proprietary models.
NOTE 21. FAIR VALUE MEASUREMENTS (Continued)
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 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	Various		21.6
Total Fixed Maturity Investments in Corporate Securities			$	435.6
The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2013.
DOLLARS IN MILLIONS	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
Investment-grade	Market Yield		$	108.5			1	%	-	6	%	4.3	%
Non-investment-grade:
Senior Debt	Market Yield		93.9				4.2		-	15.6		8.6
Junior Debt	Market Yield		153.5				8.8		-	26.6		14.2
Collateralized Loan Obligations	Market Yield		44.7				3.2		-	6.8		4.3
Other	Various		20.1
Total Fixed Maturity Investments in Corporate Securities			$	420.7
For an investment in a fixed maturity security, an increase in the yield used to determine the fair value of the security will decrease the fair value of the security. A decrease in the yield used to determine fair value will increase the fair value of the security, but the fair value increase is generally limited to par if the security is currently callable.
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
NOTE 21. FAIR VALUE MEASUREMENTS (Continued)
party fund managers, 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 year ended December 31, 2014 is presented below:
DOLLARS IN MILLIONS	Fixed Maturities														Equity Securities
	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair Value Option			Total
	Bonds				Preferred							and Asset-			and			Equity
	and				Stocks							backed			Common			Interests
	Notes														Stocks
Balance at Beginning of Year	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	—		$	626.7
Total Gains (Losses):
Included in Consolidated Statement of Income	(3.4		)		—				0.2			0.1			1.1			2.7			(0.7		)	—
Included in Other Comprehensive Income	5.1				(0.1		)		(1.0		)	0.1			0.5			2.2			—			6.8
Purchases	201.4				—				26.1			—			8.9			53			58			347.4
Settlements	(126.4		)		(0.6		)		—			(0.8		)	(4.5		)	(39.8		)	—			(172.1		)
Sales	(79.0		)		—				(5.6		)	—			(2.2		)	(5.8		)	(4.0		)	(96.6		)
Transfers into Level 3	—				—				—			—			3.6			—			—			3.6
Transfers out of Level 3	(1.2		)		—				—			—			(0.7		)	—			—			(1.9		)
Balance at End of Year	$	360.6			$	6.7			$	64.4		$	3.9		$	38.8		$	186.2		$	53.3		$	713.9
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 year ended December 31, 2014. The transfers into Level 3 and out of Level 3 for the year ended December 31, 2014 were due to changes in the availability of market observable inputs.
Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the year ended December 31, 2013 is presented below:
DOLLARS IN MILLIONS	Fixed Maturities														Equity Securities						Total
	Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other
	Bonds				Preferred							and Asset-			and			Equity
	and				Stocks							backed			Common			Interests
	Notes														Stocks
Balance at Beginning of Year	$	361			$	4.7			$	—		$	0.1		$	13.3		$	141.3		$	520.4
Total Gains (Losses):
Included in Consolidated Statement of Income	(7.9		)		0.2				0.2			0.1			(1.0		)	(1.6		)	(10.0		)
Included in Other Comprehensive Income	(7.8		)		(1.3		)		0.4			(0.5		)	4.6			5.6			1
Purchases	145.1				5.1				44.1			4.5			15.9			55.4			270.1
Settlements	(123.2		)		(1.3		)		—			(0.1		)	—			(26.8		)	(151.4		)
Sales	(0.1		)		—				—			(2.0		)	(0.7		)	—			(2.8		)
Transfers into Level 3	5.8				—				—			2.4			—			—			8.2
Transfers out of Level 3	(8.8		)		—				—			—			—			—			(8.8		)
Balance at End of Year	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	626.7
NOTE 21. FAIR VALUE MEASUREMENTS (Continued)
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 year ended December 31, 2013. The transfers into Level 3 and out of Level 3 for the year ended December 31, 2013 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 Level 1 or Level 2 measurements.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Contingencies	NOTE 22. CONTINGENCIES
	In the ordinary course of its businesses, the Company is involved in legal proceedings, including lawsuits, regulatory examinations and inquiries. Except with regard to the matters discussed below, based on currently available information, the Company does not believe that it is reasonably possible that any of its pending legal proceedings will have a material effect on the Company’s consolidated financial statements.
	Over the last several years, certain state insurance regulators, legislators, treasurers/controllers, and their respective agents have been involved in an array of initiatives that seek, in various ways, to impose new duties on life insurance companies to proactively search for deaths of their insureds and contact the insureds’ beneficiaries even though such beneficiaries may not have submitted claims, including due proof of death, as required under the terms of state-approved life insurance policy forms. 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. Legislation has been enacted in Indiana, Iowa, Kentucky, Maryland, Montana, Nevada, New York, North Dakota, Rhode Island and Vermont, with varying effective dates (the “DMF Statutes”), that requires life insurance companies to compare on a regular basis their records for all in-force policies (including those policies issued prior to the effective dates of the legislation) against the database of reported deaths maintained by the Social Security Administration or a comparable database (a “Death Master File”). In contrast, New Mexico and Tennessee have enacted legislation that also requires such comparisons, but exempts life insurance companies, like the Life Companies, that have not previously utilized a Death Master File, and instead only requires that such companies conduct Death Master File comparisons for life insurance policies issued and delivered in each of those states after the legislation’s effective date. Likewise, Alabama, Georgia and Mississippi have enacted statutes that require such comparisons, but only with respect to policies issued on or after their respective effective dates, without regard to prior Death Master File use. With respect to those DMF Statutes that apply retroactively and which would likely have an adverse effect on the Company’s operations and financial position, the Life Companies have filed declaratory judgment actions in applicable state courts challenging the application of such statutes to policies issued prior to the subject 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 with respect to those life insurance policies issued in Kentucky on or after the effective date of the Kentucky DMF Statute, consistent with what the Life Companies believe are the requirements of applicable Kentucky statutory law, the Kentucky Constitution and the Contract Clause of the United States Constitution. In April 2013, the trial court denied the subject Life Companies’ motion for summary judgment and held that the requirements of the Kentucky DMF Statute apply to life insurance policies issued before the statute’s January 1, 2013 effective date. The subject Life Companies appealed the trial court’s decision and in August 2014, in a unanimous opinion, the Kentucky Court of Appeals reversed the trial court and held that the Kentucky DMF statute fell within Kentucky’s statutory presumption against retroactive legislation. Therefore, the Court ruled, the Kentucky DMF Statute can only apply to policies issued on and after January 1, 2013. In September 2014, the Kentucky Department of Insurance filed a motion asking for the Kentucky Supreme Court to undertake a discretionary review of the Court of Appeal’s ruling. A decision by the Kentucky Supreme Court on whether to review the Court of Appeals’ decision is expected by the third quarter of 2015.
	•	In July 2013, certain of the Life Companies filed a declaratory judgment action in state court in Maryland, asking the court to construe the Maryland DMF Statute to apply only prospectively, i.e., only to policies issued in Maryland after the effective date of the Maryland DMF Statute, consistent with what the Life Companies believe are the requirements of the Maryland Constitution and the Contract Clause of the United States Constitution. The Maryland Insurance Administration filed a motion to dismiss the action, contending that the subject Life Companies were required to
	NOTE 22. CONTINGENCIES (Continued)
	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 have declined to stay enforcement of the Maryland DMF Statute pending the appeal, and the Life Companies are complying with the Maryland DMF Statute while they continue to pursue their appeal. The Life Companies’ appeal was heard by the Maryland Court of Special Appeals in December 2014. The parties are awaiting the court’s decision.
	•	In August 2014, certain of the Life Companies filed a declaratory judgment action in Indiana state court, asking the court to construe the Indiana DMF Statute to apply only prospectively, i.e., only with respect to those life insurance policies issued in Indiana on or after the effective date of the Indiana DMF Statute, consistent with what the Life Companies believe are the requirements of applicable Indiana statutory law, the Indiana Constitution and the Contract Clause of the United States Constitution. The Indiana Department of Insurance filed an answer in response to the subject Life Companies’ complaint in October 2014, and the Life Companies filed a motion for summary judgment in January 2015. A hearing on that motion is scheduled for May 2015.
	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 by the court until the California Court of Appeals rules on a preliminary injunction order issued in a related case involving an unaffiliated life insurance company, entitled Chiang v. American National Insurance Company (the “ANICO Appeal”). In July 2014, the court granted a motion by the CA Controller to stay the Life Companies’ litigation in its entirety, including all discovery, pending a decision in the ANICO Appeal. As described below, the Life Companies have filed a counterclaim in this case against the CA Controller. The current stay of the Controller’s case against the Life Companies means that no substantive ruling is likely to occur before late 2015. Pending the outcome of this litigation, the Life Companies have not produced any of 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 regulators that is focused on the Life Companies’ claim settlement and policy administration practices, and specifically their compliance with state unclaimed property statutes (the “Multi-State Exam”). The Multi-State Exam was originated in June 2012 as a single-state examination by the Illinois Director of Insurance. Insurance regulators from five additional states - California, Florida, Pennsylvania, New Hampshire and North Dakota - joined the examination in May 2013. In August 2014, New Hampshire withdrew from participation in the Multi-State Exam. In July 2013, the Life Companies received requests from the Illinois Department of Insurance, as the managing lead state for the Multi-State Exam, for a significant volume of information beyond that which the Life Companies had already produced, including their records of all in-force policies and other information of the type previously requested by the Audit Firm as part of the Treasurers’ Audit and which is the subject of the CA Controller’s complaint. This request prompted the Illinois litigation noted below. In August 2014, the Illinois Department of Insurance appointed a law firm to act as an additional examiner in the Multi-State Exam, which 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 has been continued until the Court of Appeals issues its decision in the ANICO Appeal. Oral argument in the ANICO Appeal has been set for February 2015. In related
	NOTE 22. CONTINGENCIES (Continued)
	activity, the CA Controller’s petition for coordination of the five unclaimed property lawsuits pending in California to have them all heard by the same court was denied in January 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 the DMF for purposes of identifying deceased insureds, as well as the Life Companies’ associated claim for injunctive relief. The court dismissed with prejudice the other counts in the complaint. In August 2014, the IDOI filed its answer to the counts of the complaint that the Illinois court allowed to stand, and in October 2014, the Life Companies filed a motion for summary judgment with respect to those remaining counts. The IDOI filed a cross motion for summary judgment in December 2014. Formal briefing and a hearing schedule on the summary judgment motions are expected to be set by the court at a May 2015 status conference. The actions against the insurance regulators in the states of Florida and Pennsylvania have been stayed by agreement of the parties pending the outcome of the Illinois action.
	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 apply such new requirements retroactively to the Life Companies’ existing life insurance policies, it will fundamentally alter the nature and timing of their responsibilities under such policies by effectively eliminating contractual terms that condition claim settlement and payment on the receipt of a claim, including “due proof of death” of an insured. The outcomes of the various state initiatives and related litigation could 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	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Parties	NOTE 23. 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 $85.8 million, $154.7 million and $125.2 million in assets managed by FS&C at December 31, 2014, 2013 and 2012, respectively, under an agreement with FS&C whereby FS&C provides investment management services with respect to certain assets of Trinity. In the fourth quarter of 2014, Trinity reduced the amount of assets under management with FS&C by $80.0 million. Investment Expenses incurred in connection with such agreement were $0.3 million, $0.4 million and $0.3 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	FS&C also provides investment management services with respect to certain funds of the Company’s Pension Plan. The Company’s Pension Plan had $159.2 million, $148.6 million and $120.7 million in assets managed by FS&C at December 31, 2014, 2013 and 2012, respectively, under an agreement with FS&C whereby FS&C provides investment management services. Investment Expenses incurred in connection with such agreement were $0.4 million, $0.3 million and $0.3 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	With respect to the Company’s defined contribution plans, until November 4, 2014, one of the alternative investment choices afforded to participating employees was the Dreyfus Appreciation Fund, an open-end, diversified managed investment fund. FS&C provides investment management services to the Dreyfus Appreciation Fund as a sub-investment advisor. The Company does not compensate FS&C for services provided to the Dreyfus Appreciation Fund. Participants in the Company’s defined contribution plans had allocated $22.8 million and $20.4 million for investment in the Dreyfus Appreciation Fund at December 31, 2013 and 2012, respectively, representing 6% and 7% of the total amount invested in the Company’s defined contribution plans at such dates.
	The Company believes that the transactions described above have been provided on terms no less favorable to the Company than could have been negotiated with non-affiliated third parties.
	As described in Note 20, “Other Reinsurance,” to the Consolidated Financial Statements, the Company also has certain relationships with Capitol, a mutual insurance company which is owned by its policyholders, and its subsidiary, ORCC.

Quarterly_Financial_Informatio

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Quarterly Financial Information	NOTE 24. QUARTERLY FINANCIAL INFORMATION (Unaudited)
		Three Months Ended (Unaudited)												Year Ended
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	Mar 31,			Jun 30,			Sep 30,			Dec 31,			Dec 31,
		2014			2014			2014			2014			2014
	Revenues:
	Earned Premiums	$	477.6		$	470.3		$	462.8		$	451.5		$	1,862.20
	Net Investment Income	71.1			72.6			72.3			93.1			309.1
	Other Income	0.1			0.2			0.5			0.6			1.4
	Net Realized Gains on Sales of Investments	6.6			3.5			8			21			39.1
	Other-than-temporary Impairment Losses:
	Total Other-than-temporary Impairment Losses	(0.8		)	(4.1		)	(3.8		)	(6.5		)	(15.2		)
	Portion of Losses Recognized in Other Comprehensive Income	—			—			—			—			—
	Net Impairment Losses Recognized in Earnings	(0.8		)	(4.1		)	(3.8		)	(6.5		)	(15.2		)
	Total Revenues	554.6			542.5			539.8			559.7			2,196.60
	Expenses:
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	327.9			347.5			300.5			285.8			1,261.70
	Insurance Expenses	152.1			161.3			158.6			156.4			628.4
	Write-off of Long-lived Asset	—			—			54.6			—			54.6
	Interest and Other Expenses	22.7			22.5			22.1			24.4			91.7
	Total Expenses	502.7			531.3			535.8			466.6			2,036.40
	Income from Continuing Operations before Income Taxes	51.9			11.2			4			93.1			160.2
	Income Tax Benefit (Expense)	(16.7		)	(1.9		)	0.8			(29.8		)	(47.6		)
	Income from Continuing Operations	35.2			9.3			4.8			63.3			112.6
	Income (Loss) from Discontinued Operations	(0.1		)	—			(0.1		)	2.1			1.9
	Net Income	$	35.1		$	9.3		$	4.7		$	65.4		$	114.5
	Income from Continuing Operations Per Unrestricted Share:
	Basic	$	0.63		$	0.17		$	0.09		$	1.2		$	2.08
	Diluted	$	0.63		$	0.17		$	0.09		$	1.2		$	2.08
	Net Income Per Unrestricted Share:
	Basic	$	0.63		$	0.17		$	0.09		$	1.24		$	2.12
	Diluted	$	0.63		$	0.17		$	0.09		$	1.24		$	2.12
	Dividends Paid to Shareholders Per Share	$	0.24		$	0.24		$	0.24		$	0.24		$	0.96
	The sum of quarterly per share amounts does not equal per share amounts for the year due to differences in weighted-average shares and/or equivalent shares outstanding for each of the periods presented.
	NOTE 24. QUARTERLY FINANCIAL INFORMATION (Unaudited) (Continued)
		Three Months Ended (Unaudited)												Year Ended
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	Mar 31,			Jun 30,			Sep 30,			Dec 31,			Dec 31,
		2013			2013			2013			2013			2013
	Revenues:
	Earned Premiums	$	509.9		$	512.8		$	507.5		$	495.6		$	2,025.80
	Net Investment Income	80.8			74.6			82.4			76.9			314.7
	Other Income	0.2			0.2			0.1			0.3			0.8
	Net Realized Gains on Sales of Investments	26.9			2.3			49.1			20.8			99.1
	Other-than-temporary Impairment Losses:
	Total Other-than-temporary Impairment Losses	(2.4		)	(2.3		)	(3.5		)	(7.6		)	(15.8		)
	Portion of Losses Recognized in Other Comprehensive Income	0.5			1.3			0.1			—			1.9
	Net Impairment Losses Recognized in Earnings	(1.9		)	(1.0		)	(3.4		)	(7.6		)	(13.9		)
	Total Revenues	615.9			588.9			635.7			586			2,426.50
	Expenses:
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	349.2			354.2			338.3			315.5			1,357.20
	Insurance Expenses	158.3			163.1			170.1			162.9			654.4
	Interest and Other Expenses	23.8			25.2			25.3			26.2			100.5
	Total Expenses	531.3			542.5			533.7			504.6			2,112.10
	Income from Continuing Operations before Income Taxes	84.6			46.4			102			81.4			314.4
	Income Tax Expense	(26.0		)	(13.9		)	(33.4		)	(26.6		)	(99.9		)
	Income from Continuing Operations	58.6			32.5			68.6			54.8			214.5
	Income (Loss) from Discontinued Operations	(0.2		)	1.5			1.5			0.4			3.2
	Net Income	$	58.4		$	34		$	70.1		$	55.2		$	217.7
	Income from Continuing Operations Per Unrestricted Share:
	Basic	$	1		$	0.56		$	1.21		$	0.98		$	3.75
	Diluted	$	1		$	0.56		$	1.21		$	0.98		$	3.74
	Net Income Per Unrestricted Share:
	Basic	$	1		$	0.59		$	1.24		$	0.99		$	3.81
	Diluted	$	1		$	0.59		$	1.23		$	0.99		$	3.8
	Dividends Paid to Shareholders Per Share	$	0.24		$	0.24		$	0.24		$	0.24		$	0.96
The sum of quarterly per share amounts does not equal per share amounts for the year due to differences in weighted-average shares and/or equivalent shares outstanding for each of the periods presented.

Schedule_1_Investments_Other_T

Schedule 1 - Investments Other Than Investments in Related Parties	12 Months Ended
	Dec. 31, 2014
Summary of Investments, Other than Investments in Related Parties [Abstract]
Schedule of Investments Other than Investments in Related Parties	SCHEDULE I
	KEMPER CORPORATION AND SUBSIDIARIES
	INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES
	DECEMBER 31, 2014
	(Dollars in Millions)
		Amortized		Fair Value		Amount
		Cost				Carried in
						Balance Sheet
	Fixed Maturities:
	Bonds and Notes:
	United States Government and Government Agencies and Authorities	$	315.2	$	345.5	$	345.5
	States and Political Subdivisions	1,352.50		1,477.10		1,477.10
	Corporate Securities:
	Other Bonds and Notes	2,599.30		2,878.50		2,878.50
	Redeemable Preferred Stocks	5.9		6.7		6.7
	Collateralized Loan Obligations	64.9		64.4		64.4
	Other Mortgage- and Asset-backed	3.9		5.4		5.4
	Total Investments in Fixed Maturities	4,341.70		4,777.60		4,777.60
	Equity Securities:
	Preferred Stocks	101.8		109.5		109.5
	Common Stocks	104.2		133.8		133.8
	Other Equity Interests	355.5		388.9		388.9
	Total Investments in Equity Securities	561.5		632.2		632.2
	Fair Value Option Investments	53.3		53.3		53.3
	Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings	184.8		XXX.X		184.8
	Loans, Real Estate and Other Investments	449.6		XXX.X		449.6
	Short-term Investments	342.2		XXX.X		342.2
	Total Investments	$	5,933.10			$	6,439.70
	See Accompanying Report of Independent Registered Public Accounting Firm.

Schedule_2_Parent_Company_Fina

Schedule 2 - Parent Company Financial Statements	12 Months Ended
	Dec. 31, 2014
Parent Company Financial Statements [Abstract]
Parent Company Financial Statements	SCHEDULE II
	KEMPER CORPORATION
	PARENT COMPANY BALANCE SHEETS
	(Dollars in Millions)
		December 31,
		2014			2013
	ASSETS
	Investments in Subsidiaries	$	2,677.50		$	2,614.00
	Fixed Maturities at Fair Value (Amortized Cost: 2014 – $12.2)	12.2			—
	Equity Securities at Fair Value (Cost: 2014 – $21.9; 2013 – $4.7)	21.8			5
	Fair Value Option Investments	53.3			—
	Short-term Investments	225.1			130.8
	Cash	17.9			20.8
	Other Receivables	6.9			4.9
	Current and Deferred Income Taxes	4.7			35
	Other Assets	5.6			7.3
	Total Assets	$	3,025.00		$	2,817.80
	LIABILITIES AND SHAREHOLDERS’ EQUITY
	Senior Notes Payable, 6.00% due 2017 (Fair Value: 2014 – $390.2; 2013 – $395.5)	$	358.5		$	357.9
	Senior Notes Payable, 6.00% due 2015 (Fair Value: 2014 – $260.2; 2013 – $271.6)	249.5			249
	Subordinated Debentures due 2054 (Fair Value: 2014 – $154.0)	144.1			—
	Liabilities for Income Taxes	14.5			90.5
	Liabilities for Benefit Plans	160.2			63.9
	Accrued Expenses and Other Liabilities	7.5			5
	Total Liabilities	934.3			766.3
	Shareholders’ Equity:
	Common Stock	5.2			5.6
	Additional Paid-in Capital	660.1			694.8
	Retained Earnings	1,202.70			1,215.80
	Accumulated Other Comprehensive Income	222.7			135.3
	Total Shareholders’ Equity	2,090.70			2,051.50
	Total Liabilities and Shareholders’ Equity	$	3,025.00		$	2,817.80
	See Accompanying Report of Independent Registered Public Accounting Firm.
	KEMPER CORPORATION
	PARENT COMPANY STATEMENTS OF INCOME
	(Dollars in Millions)
		For The Years Ended December 31,
		2014			2013			2012
	Net Investment Income	$	0.9		$	0.2		$	0.2
	Net Realized Gains (Losses) on Sales of Investments	(0.2		)	0.6			0.3
	Net Impairment Losses Recognized in Earnings	(1.7		)	—			—
	Total Revenues	(1.0		)	0.8			0.5
	Interest Expense	47.9			39			39.5
	Other Operating Expenses	2.7			21.6			13.6
	Total Operating Expenses	50.6			60.6			53.1
	Loss before Income Taxes and Equity in Net Income of Subsidiaries	(51.6		)	(59.8		)	(52.6		)
	Income Tax Benefit	18.9			20.8			18.2
	Loss before Equity in Net Income of Subsidiaries	(32.7		)	(39.0		)	(34.4		)
	Equity in Net Income of Subsidiaries	147.2			256.7			137.8
	Net Income	$	114.5		$	217.7		$	103.4
	See Accompanying Report of Independent Registered Public Accounting Firm.
	KEMPER CORPORATION
	PARENT COMPANY STATEMENTS OF COMPREHENSIVE INCOME
	(Dollars in Millions)
		For The Years Ended December 31,
		2014			2013			2012
	Net Income	$	114.5		$	217.7		$	103.4
	Other Comprehensive Income (Loss):
	Unrealized Holding Gains (Losses) Arising During the Year:
	Securities Held by Subsidiaries	261.7			(324.9		)	157.9
	Securities Held by Parent	(2.0		)	—			—
	Reclassification Adjustment for Amounts Included in Net Income:
	Securities Held by Subsidiaries	(26.8		)	(37.9		)	(61.2		)
	Securities Held by Parent	1.7			—			—
Unrealized Holding Gains (Losses)	234.6			(362.8		)	96.7
Unrecognized Postretirement Benefit Costs Arising During the Year	(106.4		)	61.6			(29.4		)
Amortization of Unrecognized Postretirement Benefit Costs	7.9			25			16.2
Net Unrecognized Postretirement Benefit Costs	(98.5		)	86.6			(13.2		)
Foreign Currency Translation Adjustments	(1.0		)	0.2			1.6
Reclassification Adjustment for Amounts Included in Net Income	—			—			—
Foreign Currency Translation Adjustments	(1.0		)	0.2			1.6
Other Comprehensive Income (Loss) before Income Taxes	135.1			(276.0		)	85.1
Income Tax Benefit (Expense):
Unrealized Holding Gains and Losses Arising During the Year:
Securities Held by Subsidiaries	(92.3		)	115.9			(55.9		)
Securities Held by Parent	0.7			—			—
Reclassification Adjustment for Amounts Included in Net Income:
Securities Held by Subsidiaries	9.4			13.2			21.5
Securities Held by Parent	(0.6		)	—			—
Unrealized Holding Gains and Losses	(82.8		)	129.1			(34.4		)
Unrecognized Postretirement Benefit Costs Arising During the Year	37.5			(21.6		)	10.3
Amortization of Unrecognized Postretirement Benefit Costs	(2.8		)	(8.8		)	(5.7		)
Net Unrecognized Postretirement Benefit Costs	34.7			(30.4		)	4.6
Foreign Currency Translation Adjustments	0.4			(0.1		)	(0.6		)
Reclassification Adjustment for Amounts Included in Net Income	—			—			—
Foreign Currency Translation Adjustments	0.4			(0.1		)	(0.6		)
Income Tax Benefit (Expense)	(47.7		)	98.6			(30.4		)
Other Comprehensive Income (Loss)	87.4			(177.4		)	54.7
Total Comprehensive Income	$	201.9		$	40.3		$	158.1
See Accompanying Report of Independent Registered Public Accounting Firm.
KEMPER CORPORATION
PARENT COMPANY STATEMENTS OF CASH FLOWS
(Dollars in Millions)
	For The Years Ended December 31,
	2014			2013			2012
Operating Activities:
Net Income	$	114.5		$	217.7		$	103.4
Adjustment Required to Reconcile Net Income to Net Cash Provided by Operations:
Equity in Net Income of Subsidiaries	(147.2		)	(256.7		)	(137.8		)
Cash Dividends from Subsidiaries	159.1			95			95
Cash Contribution to Defined Benefit Plan	—			(55.0		)	—
Net Realized (Gains) Losses on Sales of Investments	0.2			(0.6		)	(0.3		)
Net Impairment Losses Recognized in Earnings	1.7			—			—
Other, Net	10.5			67.3			8.5
Net Cash Provided by Operating Activities	138.8			67.7			68.8
Investing Activities:
Capital Distribution from Subsidiary	1.1			50.5			20
Sales, Paydowns and Maturities of Fixed Maturities	11.5			—			13.1
Sales of Equity Securities	15.1			—			—
Sales of Fair Value Option Investments	6.9			—			—
Purchases of Fair Value Option Investments	(60.9		)	—			—
Change in Short-term Investments	(94.3		)	52.7			(106.3		)
Net Cash Provided (Used) by Investing Activities	(120.6		)	103.2			(73.2		)
Financing Activities:
Net Proceeds from Issuance of Subordinated Debentures	144			—			—
Cash Dividends Paid	(51.8		)	(54.9		)	(56.9		)
Common Stock Repurchases	(114.0		)	(100.4		)	(60.7		)
Cash Exercise of Stock Options	0.5			1.7			1.3
Excess Tax Benefits on Share Based Awards	0.2			1.3			0.5
Net Cash Used by Financing Activities	(21.1		)	(152.3		)	(115.8		)
Increase (Decrease) in Cash	(2.9		)	18.6			(120.2		)
Cash, Beginning of Year	20.8			2.2			122.4
Cash, End of Year	$	17.9		$	20.8		$	2.2
See Accompanying Report of Independent Registered Public Accounting Firm.

Schedule_3_Supplementary_Insur

Schedule 3 - Supplementary Insurance Information	12 Months Ended
	Dec. 31, 2014
Supplementary Insurance Information [Abstract]
Supplementary Insurance Information	KEMPER CORPORATION AND SUBSIDIARIES
	SUPPLEMENTARY INSURANCE INFORMATION
	(Dollars in Millions)
			Year Ended December 31,															At December 31
			Earned Premiums		Premiums		Other		Net		Insurance		Amortization		Other			Deferred		Insurance		Unearned
					Written		Income		Investment		Claims		Of Deferred		Insurance			Policy		Reserves		Premiums
									Income		and		Policy		Expenses			Acquisition
											Policy-		Acquisition					Costs
											holders’		Costs
											Benefits
	2014
	Property & Casualty Insurance		$	1,249.50	$	1,189.10	$	0.5	$	72.7	$	887.3	$	187.5	$	166.2		$	78.2	$	651.1	$	509.7
	Life & Health Insurance (1)		612.7		N/A		0.9		218.7		374.4		47.9		268.1			225.1		3,278.20		27.2
	Other		—		N/A		—		17.7		—		—		(41.3		)	—		78.3		—
	Total		$	1,862.20	N/A		$	1.4	$	309.1	$	1,261.70	$	235.4	$	393		$	303.3	$	4,007.60	$	536.9
	2013
	Property & Casualty Insurance		$	1,392.90	$	1,342.20	$	0.5	$	90.9	$	969.3	$	207.2	$	168.2		$	85.7	$	742.6	$	570.3
	Life & Health Insurance (1)		632.9		N/A		0.2		209.9		387.9		46.7		271.5			217.2		3,222.80		28.6
	Other		—		N/A		0.1		13.9		—		—		(39.2		)	—		95.6		—
	Total		$	2,025.80	N/A		$	0.8	$	314.7	$	1,357.20	$	253.9	$	400.5		$	302.9	$	4,061.00	$	598.9
	2012
	Property & Casualty Insurance		$	1,467.20	$	1,454.10	$	0.7	$	77.9	$	1,188.90	$	212.6	$	179.9
	Life & Health Insurance (1)		639.9		N/A		0.1		204.3		393.1		44.4		266.4
	Other		—		N/A		—		13.7		—		—		(31.0		)
	Total		$	2,107.10	N/A		$	0.8	$	295.9	$	1,582.00	$	257	$	415.3
	-1	The Company’s Life & Health Insurance employee-agents also market certain property and casualty insurance products under common management. Accordingly, the Company includes the results of these property and casualty insurance products in its Life & Health Insurance segment.
	See Accompanying Report of Independent Registered Public Accounting Firm.

Schedule_4_Reinsurance_Schedul

Schedule 4 - Reinsurance Schedule	12 Months Ended
	Dec. 31, 2014
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]
Reinsurance Schedule	SCHEDULE IV
	KEMPER CORPORATION
	REINSURANCE SCHEDULE
	FOR THE YEARS ENDED DECEMBER 31, 2014, 2013 AND 2012
	(Dollars in Millions)
		Gross		Ceded to		Assumed		Net		Percentage
		Amount		Other		from Other		Amount		of Amount
				Companies		Companies				Assumed to
										Net
	Year Ended December 31, 2014
	Life Insurance in Force	$	20,565.90	$	541.5	$	217.8	$	20,242.20	1.1	%
	Premiums:
	Life Insurance	$	387.5	$	1.5	$	1.6	$	387.6	0.4	%
	Accident and Health Insurance	146.3		0.5		2.8		148.6		1.9	%
	Property and Liability Insurance	1,297.30		24		52.7		1,326.00		4	%
	Total Premiums	$	1,831.10	$	26	$	57.1	$	1,862.20	3.1	%
	Year Ended December 31, 2013
	Life Insurance in Force	$	21,006.00	$	576.4	$	229.5	$	20,659.10	1.1	%
	Premiums:
	Life Insurance	$	392.4	$	1.5	$	1.8	$	392.7	0.5	%
	Accident and Health Insurance	161.9		0.6		0.1		161.4		0.1	%
	Property and Liability Insurance	1,452.70		31.8		50.8		1,471.70		3.5	%
	Total Premiums	$	2,007.00	$	33.9	$	52.7	$	2,025.80	2.6	%
	Year Ended December 31, 2012
	Life Insurance in Force	$	21,340.40	$	610.4	$	242.9	$	20,972.90	1.2	%
	Premiums:
	Life Insurance	$	392.8	$	1.4	$	2	$	393.4	0.5	%
	Accident and Health Insurance	165.5		0.4		0.1		165.2		0.1	%
	Property and Liability Insurance	1,547.30		40.7		41.9		1,548.50		2.7	%
	Total Premiums	$	2,105.60	$	42.5	$	44	$	2,107.10	2.1	%
	See Accompanying Report of Independent Registered Public Accounting Firm.

Summary_Of_Accounting_Policies1

Summary Of Accounting Policies And Accounting Changes (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Investments	Investments
	Investments in Fixed Maturities include bonds, notes and redeemable preferred stocks. Investments in Fixed Maturities are classified as available for sale and reported at fair value. Net Investment Income, including amortization of purchased premiums and accretion of market discounts, on Investments in Fixed Maturities is recognized as interest over the period that it is earned using the effective yield method.
	Investments in Equity Securities include common and non-redeemable preferred stocks and other equity interests and are reported at fair value. Investments in common and non-redeemable preferred stocks with readily determinable fair values are classified as available for sale. Dividend income on investments in common and non-redeemable preferred stocks is recognized on the ex-dividend date. Other equity interests primarily consist of exchange traded funds and interests in limited liability companies and limited partnerships in which the Company’s interests are deemed minor. The Company’s share of distributed earnings from other equity interests is recognized as dividend income when received.
	Unrealized appreciation or depreciation, net of applicable deferred income taxes, on fixed maturities and equity securities classified as available for sale is reported in AOCI included in Shareholders’ Equity.
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	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.
	Fair Value Option Investments include investments in certain hedge funds, which the Company has elected the fair value option (“FVO”) to account for such investments. Under the FVO method of accounting, the Company reports changes in the fair value of such investments in Net Investment Income in the Consolidated Statement of Income. The hedge funds are designed to preserve liquidity, while providing higher returns than Kemper would otherwise expect to earn had it invested in other short-term investments.
	Short-term Investments include fixed maturities that mature within one year from the date of purchase, U.S. Treasury bills, money market mutual funds and repurchase agreements. Short-term Investments are reported at cost, which approximates fair value.
	Other Investments primarily include loans to policyholders and real estate. Loans to policyholders are carried at unpaid principal balance. Real estate is carried at cost, net of accumulated depreciation. Real estate is depreciated over the estimated useful life of the asset using the straight-line method of depreciation. Real estate is evaluated for impairment when events or circumstances indicate the carrying value may not be recoverable. An impairment loss on real estate is recognized when the carrying value exceeds the sum of undiscounted projected future cash flows as well as the fair value, or, in the case of a property classified as held for sale, when the carrying value exceeds the fair value, net of costs to sell.
	Gains and losses on sales of investments are computed on the specific identification method and are reported in the Consolidated Statements of Income in the period in which the sales occur. 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. Losses are computed on the specific identification method and reported in the Consolidated Statements of Income in the period that the decline is determined to be other than temporary. The portion of an impairment of an investment in a fixed maturity attributed to a credit loss is reported in Net Impairment Losses Recognized in Earnings in the Consolidated Statement of Income, with the portion of the impairment that is not attributed to a credit loss reported in AOCI.
Fair Value Measurements	Fair Value Measurements
	The Company uses a hierarchal framework which prioritizes and ranks the market observability of inputs used in fair value measurements. Market price observability is affected by a number of factors, including the type of asset or liability and the characteristics specific to the asset or liability being measured. Assets and liabilities with readily available, active, quoted market prices or for which fair value can be measured from actively quoted prices generally are deemed to have a higher degree of market price observability and a lesser degree of judgment used in measuring fair value. The Company classifies the inputs used to measure fair value into one of three levels as follows:
	•	Level 1 — Quoted prices in an active market for identical assets or liabilities;
	•	Level 2 — Observable inputs other than Level 1, quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and model-derived prices whose inputs are observable or whose significant value drivers are observable; and
	•	Level 3 — Unobservable inputs for the asset or liability being measured.
	Observable inputs are based on market data obtained from independent sources, while unobservable inputs are based on the Company’s market assumptions. Unobservable inputs require significant management judgment or estimation. In some cases, the inputs used to measure an asset or liability may fall into different levels of the fair value hierarchy. In those cases, the fair value measurement is categorized in its entirety in the same level of the fair value hierarchy as the lowest level of input that is significant to the entire measurement. Such determination requires significant management judgment. However, in accordance with GAAP, the Company is not permitted to use management judgment to adjust quoted market prices in an active market.
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs
	Costs directly associated with the successful acquisition of business, principally commissions and certain premium taxes and policy issuance costs, are deferred. Costs deferred on property and casualty insurance contracts and short duration health insurance contracts are amortized over the period in which premiums are earned. Costs deferred on traditional life insurance products and other long-duration insurance contracts are primarily amortized over the anticipated premium-paying period of the
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	related policies in proportion to the ratio of the annual premiums to the total premiums anticipated, which is estimated using the same assumptions used in calculating policy reserves.
Goodwill	Goodwill
	The cost of an acquired entity over the fair value of net assets acquired is reported as Goodwill. Goodwill is not amortized, but rather is tested annually for recoverability or when certain triggering events require testing.
Insurance Reserves	Insurance Reserves
	Reserves for losses and LAE on property and casualty insurance coverage and health insurance coverage represent the estimated claim cost and loss adjustment expense necessary to cover the ultimate net cost of investigating and settling all losses incurred and unpaid. Such estimates are based on individual case estimates for reported claims and estimates for incurred but not reported (“IBNR”) losses. These estimates are adjusted in the aggregate for ultimate loss expectations based on historical experience patterns and current economic trends, with any change in the estimated ultimate liabilities being reported in the Consolidated Statements of Income in the period of change. Changes in such estimates may be material.
	For traditional life insurance products, the reserves for future policy benefits are estimated on the net level premium method using assumptions as of the issue date for mortality, interest, policy lapses and expenses, including provisions for adverse mortality. These assumptions vary by such characteristics as plan, age at issue and policy duration. Mortality assumptions are based on the Company’s historical experience and industry standards. Interest rate assumptions principally range from 3% to 7%. Lapse rate assumptions are based on actual and industry experience. Insurance Reserves for life insurance products also includes an estimate of the Company’s liability for unpaid life insurance claims and claims adjustment expenses, which includes an estimate for IBNR life insurance claims. Except when required by applicable law, the Company does not utilize a database of reported deaths maintained by the Social Security Administration or a comparable database (a “Death Master File”) in its operations, including to determine its IBNR liability for life insurance products. Instead of using such a database, the Company calculates its IBNR liability for life insurance products using Company-specific historical information, which includes analyzing average paid claims and the average lag between date of death and the date reported to the Company for claims that due proof of death has been provided.
Other Receivables	Other Receivables
	Other Receivables primarily include reinsurance recoverables and accrued investment income.
Other Assets	Other Assets
	Other Assets primarily include property and equipment, internal use software, insurance licenses acquired in business combinations, the value of other intangible assets acquired, corporate-owned life insurance and prepaid expenses. Property and equipment is depreciated over the useful lives of the assets, generally using the straight-line or double declining balance methods of depreciation depending on the asset involved. Internal use software is primarily amortized over the useful life of the asset using the straight-line method of amortization. Write-off of Long-lived Asset for the year ended December 31, 2014 was a charge of $54.6 million to write off certain software that the Company determined that it was no longer probable that the software would be fully implemented. Insurance licenses acquired in business combinations and other indefinite life intangibles are not amortized, but rather tested periodically for recoverability. Insurance Expenses for the year ended December 31, 2013 includes a charge of $1.4 million to write down the value of insurance licenses acquired for one of Kemper’s insurance subsidiaries to its estimated fair value. Corporate-owned life insurance is reported at cash surrender value with changes due to cost of insurance and investment experience reported in Other Income in the Consolidated Statements of Income.
	The Company accounts for the present value of the future profits embedded in life insurance in force acquired (“Life VIF”) based on actuarial estimates of the present value of estimated net cash flows. Life VIF was $36.5 million and $41.2 million at December 31, 2014 and 2013, respectively. Life VIF is amortized using the effective interest method using interest rates consistent with the rates in the underlying insurance contracts. The Company estimates that it will record Life VIF amortization, net of interest, of $4.2 million in 2015, $3.7 million in 2016, $3.2 million in 2017, $2.9 million in 2018 and $2.4 million in 2019. The Company evaluates the Life VIF for recoverability annually.
	The Company accounts for the present value of the future profits embedded in Property and Casualty Insurance Customer Relationships Acquired (“P&C Customer Relationships”) based on the present value of estimated future cash flows from the customer relationships acquired. P&C Customer Relationships was $13.3 million and $15.8 million at December 31, 2014 and
	NOTE 2. SUMMARY OF ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Continued)
	2013, respectively. P&C Customer Relationships is amortized using the effective interest method. P&C Customer Relationships is tested for recoverability using undiscounted projections of future cash flows and written down to estimated fair value if the carrying value exceeds the sum of such projections of undiscounted cash flows.
Accrued Expenses and Other Liabilities	Accrued Expenses and Other Liabilities
	Accrued Expenses and Other Liabilities primarily include accrued salaries and commissions, pension benefits, postretirement medical benefits and accrued taxes, licenses and fees.
Recognition of Earned Premiums and Related Expenses	Recognition of Earned Premiums and Related Expenses
	Property and casualty insurance and short duration health insurance premiums are deferred when written and recognized and earned ratably over the periods to which the premiums relate. Unearned Premiums represent the portion of the premiums written related to the unexpired portion of policies in force which has been deferred and is reported as a liability. A premium deficiency reserve is established if the sum of expected claim costs, claim adjustment expenses, unamortized deferred policy acquisition costs and maintenance costs exceeds the related unearned premiums. For each business segment, the analysis is performed at a product line level, namely automobile insurance, homeowners insurance and other insurance, which is consistent with the manner in which the Company acquires, services and measures profitability. Anticipated investment income is excluded from such analysis.
	Traditional life insurance premiums are recognized as revenue when due. Policyholders’ benefits are associated with related premiums to result in recognition of profits over the periods for which the benefits are provided using the net level premium method.
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses include provisions for future policy benefits under life and certain accident and health insurance contracts and provisions for reported claims, estimates for claims incurred but not reported and loss adjustment expenses. Benefit payments in excess of policy account balances are expensed.
Reinsurance	Reinsurance
	In the normal course of business, Kemper’s insurance subsidiaries reinsure certain risks above certain retention levels with other insurance enterprises. These reinsurance agreements do not relieve Kemper’s insurance subsidiaries of their legal obligations to the policyholder. Amounts recoverable from reinsurers are included in Other Receivables.
	Gains related to long-duration reinsurance contracts are deferred and amortized over the life of the underlying reinsured policies. Losses related to long-duration reinsurance contracts are recognized immediately. Any gain or loss associated with reinsurance agreements for which Kemper’s insurance subsidiaries have been legally relieved of their obligations to the policyholder is recognized in the period of relief.
Income Tax	Income Taxes
	Deferred income tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred income tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. A valuation allowance is maintained for the portion of deferred income tax assets that the Company does not expect to recover. Increases in the valuation allowance for deferred income tax assets are recognized as
	income tax expense. Decreases in the valuation allowance for deferred income tax assets are recognized as income tax benefit. The effect on deferred income tax assets and liabilities of a change in tax rates is recognized in income in the period in which the change is enacted.
	The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in an income tax return. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in income tax expense.

Investments_Tables

Investments (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Schedule of Unrealized Loss on Investments	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2014 is presented below.
	DOLLARS IN MILLIONS	Less Than 12 Months						12 Months or Longer						Total
		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	)
	An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2013 is presented below:
	DOLLARS IN MILLIONS	Less Than 12 Months						12 Months or Longer						Total
		Fair			Unrealized			Fair			Unrealized			Fair		Unrealized
		Value			Losses			Value			Losses			Value		Losses
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	95.8		$	(10.9	)	$	4.4		$	(0.8	)	$	100.2	$	(11.7	)
	States and Political Subdivisions	222.9			(20.1		)	2			(0.1		)	224.9		(20.2		)
	Corporate Securities:
	Bonds and Notes	699.8			(39.4		)	103.2			(8.3		)	803		(47.7		)
	Other Mortgage- and Asset-backed	13.9			(0.1		)	1.1			—			15		(0.1		)
	Total Fixed Maturities	1,032.40			(70.5		)	110.7			(9.2		)	1,143.10		(79.7		)
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	22.5			(2.5		)	2.5			—			25		(2.5		)
	Other Industries	4.3			(0.1		)	0.7			—			5		(0.1		)
	Common Stocks:
	Manufacturing	5			(0.1		)	0.2			—			5.2		(0.1		)
	Other Industries	14.2			(0.9		)	0.5			—			14.7		(0.9		)
	Other Equity Interests:
	Exchange Traded Funds	67.6			(1.0		)	—			—			67.6		(1.0		)
	Limited Liability Companies and Limited Partnerships	53.1			(0.9		)	5			(0.7		)	58.1		(1.6		)
	Total Equity Securities	166.7			(5.5		)	8.9			(0.7		)	175.6		(6.2		)
	Total	$	1,199.10		$	(76.0	)	$	119.6		$	(9.9	)	$	1,318.70	$	(85.9	)
Other than Temporary Impairment, Credit Losses Recognized in Earnings	The following table sets forth the pre-tax amount of OTTI credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of December 31, 2014, 2013 and 2012, for which a portion of the OTTI loss related to factors other than credit has been recognized in AOCI, and the corresponding changes in such amounts.
	DOLLARS IN MILLIONS	2014			2013			2012
	Balance at Beginning of Year	$	9.9		$	4.6		$	3.9
	Additions for Previously Unrecognized OTTI Credit Losses	2.4			1.8			1.1
	Increases to Previously Recognized OTTI Credit Losses	0.6			7.3			—
	Reductions to Previously Recognized OTTI Credit Losses	—			—			(0.1		)
	Reductions for Change in Impairment Status:
	From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell	(2.4		)	(3.2		)	—
	Reductions for Investments Sold During Period	(5.2		)	(0.6		)	(0.3		)
	Balance at End of Year	$	5.3		$	9.9		$	4.6
	The components of Net Impairment Losses Recognized in Earnings reported in the Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Fixed Maturities	$	(5.7	)	$	(10.3	)	$	(1.9	)
	Equity Securities	(7.1		)	(3.6		)	(1.9		)
	Real Estate	(2.4		)	—			(3.1		)
	Net Impairment Losses Recognized in Earnings	$	(15.2	)	$	(13.9	)	$	(6.9	)
Schedule of Other Investments	The carrying values of the Company’s Other Investments at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Loans to Policyholders at Unpaid Principal	$	283.4		$	275.4
	Real Estate at Depreciated Cost	160.9			167.1
	Trading Securities at Fair Value	4.9			5
	Other	0.4			0.5
	Total	$	449.6		$	448
Investments in Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities Reconciliation	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2013 were:
		Amortized			Gross Unrealized						Fair Value
	DOLLARS IN MILLIONS	Cost			Gains			Losses
	U.S. Government and Government Agencies and Authorities	$	351.1		$	22.8		$	(11.7	)	$	362.2
	States and Political Subdivisions	1,327.40			53.8			(20.2		)	1,361.00
	Corporate Securities:
	Bonds and Notes	2,636.40			205			(47.7		)	2,793.70
	Redeemable Preferred Stocks	6.6			0.8			—			7.4
	Collateralized Loan Obligations	44.2			0.5			—			44.7
	Other Mortgage- and Asset-backed	4.8			1.3			(0.1		)	6
	Investments in Fixed Maturities	$	4,370.50		$	284.2		$	(79.7	)	$	4,575.00
	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 were:
	DOLLARS IN MILLIONS	Amortized			Gross Unrealized						Fair Value
		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
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2014 by contractual maturity were:
	DOLLARS IN MILLIONS	Amortized Cost			Fair Value
	Due in One Year or Less	$	51		$	52.7
	Due after One Year to Five Years	769.6			820.2
	Due after Five Years to Ten Years	1,340.70			1,398.00
	Due after Ten Years	1,979.40			2,294.30
	Mortgage- and Asset-backed Securities Not Due at a Single Maturity Date	201			212.4
	Investments in Fixed Maturities	$	4,341.70		$	4,777.60
Investments in Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities Reconciliation	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2014 were:
	DOLLARS IN MILLIONS	Cost			Gross Unrealized						Fair Value
					Gains			Losses
	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
	Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2013 were:
	DOLLARS IN MILLIONS				Gross Unrealized
		Cost			Gains			Losses			Fair Value
	Preferred Stocks:
	Finance, Insurance and Real Estate	$	85.4		$	2.9		$	(2.5	)	$	85.8
	Other Industries	20.1			4.4			(0.1		)	24.4
	Common Stocks:
	Manufacturing	83.4			21.3			(0.1		)	104.6
	Other Industries	68.8			17			(0.9		)	84.9
	Other Equity Interests:
	Exchange Traded Funds	122			3.9			(1.0		)	124.9
	Limited Liability Companies and Limited Partnerships	150.3			25.2			(1.6		)	173.9
	Investments in Equity Securities	$	530		$	74.7		$	(6.2	)	$	598.5

Goodwill_Tables

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill balances by business segment at December 31, 2014 and December 31, 2013 were:
	DOLLARS IN MILLIONS	2014		2013
	Property & Casualty Insurance	92.4		92.4
	Life & Health Insurance	219.4		219.4
	Total	$	311.8	$	311.8

Property_and_Casualty_Insuranc1

Property and Casualty Insurance Reserves (Tables)	12 Months Ended
	Dec. 31, 2014
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]
Liability for Unpaid Claims Adjustment Expense by Expense Type	Property and Casualty Insurance Reserve activity for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Beginning Property and Casualty Insurance Reserves:
	Gross of Reinsurance at Beginning of Year	$	843.5		$	970.6		$	1,029.10
	Less Reinsurance Recoverables at Beginning of Year	63.4			66.2			74.5
	Property and Casualty Insurance Reserves, Net of at Beginning of Year	780.1			904.4			954.6
	Incurred Losses and LAE related to:
	Current Year:
	Continuing Operations	965.4			1,056.50			1,253.10
	Prior Years:
	Continuing Operations	(53.5		)	(59.8		)	(25.2		)
	Discontinued Operations	(3.6		)	(4.8		)	(6.3		)
	Total Incurred Losses and LAE related to Prior Years	(57.1		)	(64.6		)	(31.5		)
	Total Incurred Losses and LAE	908.3			991.9			1,221.60
	Paid Losses and LAE related to:
	Current Year:
	Continuing Operations	639.8			682.2			801.4
	Prior Years:
	Continuing Operations	360.4			421.7			451.2
	Discontinued Operations	9.2			12.3			19.2
	Total Paid Losses and LAE related to Prior Years	369.6			434			470.4
	Total Paid Losses and LAE	1,009.40			1,116.20			1,271.80
	Property and Casualty Insurance Reserves, Net of Reinsurance at End of Year	679			780.1			904.4
	Plus Reinsurance Recoverables at End of Year	54.9			63.4			66.2
	Property and Casualty Insurance Reserves, Gross of Reinsurance at End of Year	$	733.9		$	843.5		$	970.6

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Total amortized cost of debt outstanding at December 31, 2014 and 2013 was:
	DOLLARS IN MILLIONS	2014			2013
	Senior Notes:
	6.00% Senior Notes due November 30, 2015	$	249.5		$	249
	6.00% Senior Notes due May 15, 2017	358.5			357.9
	7.375% Subordinated Debentures due February 27, 2054	144.1			—
	Total Debt Outstanding	$	752.1		$	606.9
Schedule of Interest Expense	Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Notes Payable under Revolving Credit Agreement	$	0.8		$	1.4		$	1.9
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	15.5			15.4			15.4
	6.00% Senior Notes due May 15, 2017	22.2			22.2			22.1
	7.375% Subordinated Debentures due February 27, 2054	9.4			—			—
	Mortgage Note Payable	—			0.2			0.4
	Interest Expense before Capitalization of Interest	47.9			39.2			39.8
	Capitalization of Interest	(1.0		)	(0.9		)	(1.8		)
	Total Interest Expense	$	46.9		$	38.3		$	38
Schedule of Interest Paid	Interest Paid, including facility fees, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Notes Payable under Revolving Credit Agreement	$	0.6		$	0.8		$	2.3
	Senior Notes Payable:
	6.00% Senior Notes due November 30, 2015	15			15			15
	6.00% Senior Notes due May 15, 2017	21.6			21.6			21.6
	7.375% Subordinated Debentures due February 27, 2054	8.5			—			—
	Mortgage Note Payable	—			0.3			0.4
	Total Interest Paid	$	45.7		$	37.7		$	39.3

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Schedule of Rent Expense	Net rental expense for operating leases for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Minimum Rental Expense	$	21.5		$	28.3		$	33.2
	Less Sublease Rental Income	(1.3		)	(1.8		)	(2.5		)
	Net Rental Expense	$	20.2		$	26.5		$	30.7
Schedule of Future Minimum Lease Payments for Capital and Operating Leases	Future minimum lease payments under capital and operating leases at December 31, 2014 were:
	DOLLARS IN MILLIONS	Capital			Operating
		Leases			Leases
	2015	$	1.9		$	16.5
	2016	1.9			14.1
	2017	0.6			12.9
	2018	0.1			9
	2019	—			7.7
	2020 and Thereafter	—			19.1
	Total Future Payments	$	4.5		$	79.3
	Less Imputed Interest	(0.4		)
	Present Value of Minimum Capital Lease Payments	$	4.1

Longterm_Equitybased_Compensat1

Long-term Equity-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the years ended December 31, 2014, 2013 and 2012, were as follows:
			2014					2013					2012
	RANGE OF VALUATION ASSUMPTIONS
	Expected Volatility		25.76	%	-	44.43	%	39.1	%	-	48.23	%	29.36	%	-	53.84	%
	Risk-free Interest Rate		1.07		-	2.14		0.62		-	1.38		0.16		-	1.26
	Expected Dividend Yield		2.53		-	2.6		2.83		-	3		2.92		-	3.26
	WEIGHTED-AVERAGE EXPECTED LIFE IN YEARS
	Employee Grants		4		-	7		4		-	7		1		-	7
	Director Grants		6					6					6
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	activity for the year ended December 31, 2014 is presented below:
			Shares			Weighted-			Weighted-		Aggregate
			Subject to			average			average		Intrinsic
			Awards			Exercise Price			Remaining		Value
						Per Share ($)			Contractual		($ In Millions)
									Life (in Years)
	Outstanding at Beginning of the Year		2,543,673			$	41.37
	Granted		289,000			36.59
	Exercised		(46,125	)		29.04
	Forfeited or Expired		(520,837	)		46.94
	Outstanding at December 31, 2014		2,265,711			39.74			3.8		$	4.3
	Vested and Expected to Vest at December 31, 2014		2,242,297			$	39.8		3.8		$	4.2
	Exercisable at December 31, 2014		1,944,207			$	40.59		3		$	3.7
Schedule of Options Outstanding	Information pertaining to Tandem Awards outstanding at December 31, 2014 is presented below:
								Outstanding								Exercisable
	Range of Exercise Prices ($)							Shares			Weighted-			Weighted-		Shares		Weighted-
								Subject to			average			average		Subject to		average
								Awards			Exercise Price			Remaining		Awards		Exercise Price
											Per Share ($)			Contractual				Per Share ($)
														Life (in Years)
	$	10		-	$	15		15,000			$	13.55		2.26		15,000		$	13.55
	15.01			-	20			8,000			16.48			4.35		8,000		16.48
	20.01			-	25			29,000			23.36			3.86		29,000		23.36
	25.01			-	30			379,000			28.84			6.17		332,998		28.74
	30.01			-	35			226,250			33.16			8.12		130,500		32.94
	35.01			-	40			573,250			36.91			5.86		393,498		37.11
	40.01			-	45			184,902			43.1			0.09		184,902		43.1
	45.01			-	50			793,541			48.59			1.15		793,541		48.59
	50.01			-	55			56,768			51.16			0.1		56,768		51.16
	10			-	55			2,265,711			39.74			3.82		1,944,207		40.59
Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan, Activity [Table Text Block]	Activity related to DSU awards for the year ended December 31, 2014 was as follows:
			Number of DSUs			Weighted-
						average
						Grant-date
						Fair Value
						Per DSU
	Vested Balance at Beginning of the Year		4,000			$	31.5
	Granted and Vested		4,000			37.53
	Vested Balance at End of Period		8,000			$	34.52
Time Vested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	Activity related to nonvested time-based restricted stock and nonvested time-based RSUs for the year ended December 31, 2014 was as follows:
		Time-based Restricted Stock Awards						Time-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	101,627			$	31.48		—			$	—
	Granted	2,000			38.59			41,925			36.56
	Vested	(25,568	)		30.56			(9,351	)		36.47
	Forfeited	(24,964	)		30.96			(2,550	)		36.47
	Nonvested Balance at End of Period	53,095			$	32.42		30,024			$	36.6
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	Activity related to nonvested performance-based restricted stock and nonvested performance-based RSU awards for the year ended December 31, 2014 was as follows:
		Performance-based Restricted Stock Awards						Performance-based RSU Awards
		Number of Shares			Weighted-			Number of RSUs			Weighted-
					average						average
					Grant-date						Grant-date
					Fair Value						Fair Value
					Per Share						Per RSU
	Nonvested Balance at Beginning of the Year	176,800			$	39.54		—			$	—
	Granted	—			—			66,575			40.5
	Vested	(54,934	)		39.83			—			—
	Forfeited	(11,241	)		40.75			(4,700	)		40.5
	Nonvested Balance at End of Period	110,625			$	39.28		61,875			$	40.5

Income_From_Continuing_Operati1

Income From Continuing Operations Per Unrestricted Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in 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 years ended December 31, 2014, 2013 and 2012 is as follows:
		2014			2013			2012
	DOLLARS IN MILLIONS
	Income from Continuing Operations	$	112.6		$	214.5		$	91.8
	Less Income from Continuing Operations Attributed to Participating Awards	0.5			1.1			0.5
	Income from Continuing Operations Attributed to Unrestricted Shares	112.1			213.4			91.3
	Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	—			—			—
	Diluted Income from Continuing Operations Attributed to Unrestricted Shares	$	112.1		$	213.4		$	91.3
	SHARES IN THOUSANDS
	Weighted-average Unrestricted Shares Outstanding	53,762.50			56,856.90			58,857.30
	Equity-based Compensation Equivalent Shares	105.4			126.7			141.7
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	53,867.90			56,983.60			58,999.00
	PER UNRESTRICTED SHARE IN WHOLE DOLLARS
	Basic Income from Continuing Operations Per Unrestricted Share	$	2.08		$	3.75		$	1.55
	Diluted Income from Continuing Operations Per Unrestricted Share	$	2.08		$	3.74		$	1.54
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
	SHARES IN THOUSANDS	2014		2013			2012
	Equity-based Compensation Equivalent Shares	1,605.10		2,080.90			2,756.10
	Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	1,605.10		2,080.90			2,756.10

Other_Comprehensive_Income_And1

Other Comprehensive Income And Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Comprehensive Income (Loss)	The components of Other Comprehensive Income (Loss) Before Income Taxes for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Other Comprehensive Income (Loss) Before Income Taxes:
	Unrealized Holding Gains (Losses) Arising During the Year Before Reclassification Adjustment	$	259.7		$	(324.9	)	$	157.9
	Reclassification Adjustment for Amounts Included in Net Income	(25.1		)	(37.9		)	(61.2		)
	Unrealized Holding Gains (Losses)	234.6			(362.8		)	96.7
	Foreign Currency Translation Adjustments Arising During the Year Before Reclassification Adjustment	(1.0		)	0.2			1.6
	Reclassification Adjustment for Amounts Included in Net Income	—			—			—
	Foreign Currency Translation Adjustments	(1.0		)	0.2			1.6
	Net Unrecognized Postretirement Benefit Costs Arising During the Year	(106.4		)	61.6			(29.4		)
	Amortization of Net Unrecognized Postretirement Benefit Costs	7.9			25			16.2
	Net Unrecognized Postretirement Benefit Costs	(98.5		)	86.6			(13.2		)
	Other Comprehensive Income (Loss) Before Income Taxes	$	135.1		$	(276.0	)	$	85.1
	The components of Other Comprehensive Income Tax Benefit (Expense) for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Income Tax Benefit (Expense):
	Unrealized Holding Gains and Losses Arising During the Year Before Reclassification Adjustment	$	(91.6	)	$	115.9		$	(55.9	)
	Reclassification Adjustment for Amounts Included in Net Income	8.8			13.2			21.5
	Unrealized Holding Gains and Losses	(82.8		)	129.1			(34.4		)
	Foreign Currency Translation Adjustments Arising During the Year Before Reclassification Adjustment	0.4			(0.1		)	(0.6		)
	Reclassification Adjustment for Amounts Included in Net Income	—			—			—
	Foreign Currency Translation Adjustment	0.4			(0.1		)	(0.6		)
	Net Unrecognized Postretirement Benefit Costs Arising During the Year	37.5			(21.6		)	10.3
	Amortization of Net Unrecognized Postretirement Benefit Costs	(2.8		)	(8.8		)	(5.7		)
	Net Unrecognized Postretirement Benefit Costs	34.7			(30.4		)	4.6
	Other Comprehensive Income Tax Benefit (Expense)	$	(47.7	)	$	98.6		$	(30.4	)
Schedule of Accumulated Other Comprehensive Income (Loss)	The components of AOCI at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Unrealized Gains on Investments, Net of Income Taxes:
	Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$	2.8		$	0.3
	Other Net Unrealized Gains on Investments	324.8			175.5
	Foreign Currency Translation Adjustments, Net of Income Taxes	0.2			0.8
	Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	(105.1		)	(41.3		)
	Accumulated Other Comprehensive Income	$	222.7		$	135.3
Reclassification out of Accumulated Other Comprehensive Income
	DOLLARS IN MILLIONS	2014			2013			2012
	Reclassification of AOCI from Unrealized Gains and Losses on Available For Sale Securities to:
	Net Realized Gains on Sales of Investments	$	37.9		$	51.8		$	65
	Net Impairment Losses Recognized in Earnings	(12.8		)	(13.9		)	(3.8		)
	Total Before Income Taxes	25.1			37.9			61.2
	Income Tax Expense	(8.8		)	(13.2		)	(21.5		)
	Reclassification from AOCI, Net of Income Taxes	16.3			24.7			39.7
	Reclassification of AOCI from Amortization of Net Unrecognized Postretirement Benefit Costs to:
	Interest and Other Expenses	(7.9		)	(25.0		)	(16.2		)
	Income Tax Benefit	2.8			8.8			5.7
	Reclassification from AOCI, Net of Income Taxes	(5.1		)	(16.2		)	(10.5		)
	Total Reclassification from AOCI to Net Income	$	11.2		$	8.5		$	29.2

Income_From_Investments_Tables

Income From Investments (Tables)	12 Months Ended
	Dec. 31, 2014
Investment Income, Net [Abstract]
Investment Income	Net Investment Income for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Investment Income (Loss):
	Interest and Dividends on Fixed Maturities	$	227.4		$	235.5		$	246.1
	Dividends on Equity Securities	59.9			38			25.7
	Equity Method Limited Liability Investments	9			26.4			9.3
	Fair Value Option Investments	(0.7		)	—			—
	Short-term Investments	0.6			0.1			0.2
	Real Estate	12.1			20.8			27.4
	Loans to Policyholders	20.5			19.8			18.9
	Other	0.1			—			0.1
	Total Investment Income	328.9			340.6			327.7
	Investment Expenses:
	Real Estate	11.3			18.3			26.1
	Other Investment Expenses	8.5			7.6			5.7
	Total Investment Expenses	19.8			25.9			31.8
	Net Investment Income	$	309.1		$	314.7		$	295.9
Realized Gain (Loss) on Investments	The components of Net Realized Gains on Sales of Investments for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Fixed Maturities:
	Gains on Sales	$	7		$	30.9		$	56.9
	Losses on Sales	(0.2		)	(0.4		)	(0.1		)
	Equity Securities:
	Gains on Sales	33.1			21.8			8.3
	Losses on Sales	(2.0		)	(0.5		)	(0.2		)
	Equity Method Limited Liability Investments:
	Gains on Sales	—			2.5			—
	Real Estate:
	Gains on Sales	—			44.2			0.2
	Losses on Sales	(0.2		)	—			—
	Other Investments:
	Gain on Sale of Subsidiary	1.6			—			—
	Gains on Other Sales	—			0.1			—
	Losses on Sales	(0.1		)	(0.1		)	—
	Net Gains (Losses) on Trading Securities	(0.1		)	0.6			0.3
	Net Realized Gains on Sales of Investments	$	39.1		$	99.1		$	65.4
	Gross Gains on Sales	$	41.7		$	99.5		$	65.4
	Gross Losses on Sales	(2.5		)	(1.0		)	(0.3		)
	Net Gains (Losses) on Trading Securities	(0.1		)	0.6			0.3
	Net Realized Gains on Sales of Investments	$	39.1		$	99.1		$	65.4
Other than Temporary Impairment, Credit Losses Recognized in Earnings	The following table sets forth the pre-tax amount of OTTI credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of December 31, 2014, 2013 and 2012, for which a portion of the OTTI loss related to factors other than credit has been recognized in AOCI, and the corresponding changes in such amounts.
	DOLLARS IN MILLIONS	2014			2013			2012
	Balance at Beginning of Year	$	9.9		$	4.6		$	3.9
	Additions for Previously Unrecognized OTTI Credit Losses	2.4			1.8			1.1
	Increases to Previously Recognized OTTI Credit Losses	0.6			7.3			—
	Reductions to Previously Recognized OTTI Credit Losses	—			—			(0.1		)
	Reductions for Change in Impairment Status:
	From Status of Credit Loss to Status of Intent-to-sell or Required-to-sell	(2.4		)	(3.2		)	—
	Reductions for Investments Sold During Period	(5.2		)	(0.6		)	(0.3		)
	Balance at End of Year	$	5.3		$	9.9		$	4.6
	The components of Net Impairment Losses Recognized in Earnings reported in the Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Fixed Maturities	$	(5.7	)	$	(10.3	)	$	(1.9	)
	Equity Securities	(7.1		)	(3.6		)	(1.9		)
	Real Estate	(2.4		)	—			(3.1		)
	Net Impairment Losses Recognized in Earnings	$	(15.2	)	$	(13.9	)	$	(6.9	)

Insurance_Expenses_Tables

Insurance Expenses (Tables)	12 Months Ended
	Dec. 31, 2014
Insurance Expenses [Abstract]
Schedule of Insurance Expenses	Insurance Expenses for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Commissions	$	324.6		$	345.7		$	366.1
	General Expenses	258.1			257.1			262.9
	Taxes, Licenses and Fees	38.9			42.8			44.7
	Total Costs Incurred	621.6			645.6			673.7
	Policy Acquisition Costs:
	Deferred	(235.8		)	(253.4		)	(266.4		)
	Amortized	235.4			253.9			257
	Net Policy Acquisition Costs Amortized (Deferred)	(0.4		)	0.5			(9.4		)
	Life VIF and P&C Customer Relationships Amortized	7.2			8.3			8
	Insurance Expenses	$	628.4		$	654.4		$	672.3

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Liabilities Table	The components of Liabilities for Income Taxes at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Current Income Tax Liabilities	$	7.8		$	1.5
	Deferred Income Tax Liabilities	21.5			—
	Unrecognized Tax Benefits	7.2			6.8
	Liabilities for Income Taxes	$	36.5		$	8.3
Schedule of Deferred Tax Assets and Liabilities	The tax effects of temporary differences that give rise to significant portions of the Company’s Net Deferred Income Tax Assets and Deferred Income Tax Liabilities at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Deferred Income Tax Assets:
	Insurance Reserves	$	78.7		$	76.4
	Unearned Premium Reserves	35.5			40.2
	Tax Capitalization of Policy Acquisition Costs	73			73.3
	Payroll and Employee Benefit Accruals	74			38.8
	Net Operating Loss Carryforwards	31.7			53.3
	Other	9.8			12.6
	Total Deferred Income Tax Assets	302.7			294.6
	Deferred Income Tax Liabilities:
	Investments	160.1			80
	Deferred Policy Acquisition Costs	106.1			106
	Life VIF and P&C Customer Relationships	17.7			20.2
	Goodwill and Licenses	28.4			26.8
	Depreciable Assets	7.4			26
	Other	4.5			3.8
	Total Deferred Income Tax Liabilities	324.2			262.8
	Net Deferred Income Tax Assets (Liabilities)	$	(21.5	)	$	31.8
Summary of Operating Loss Carryforwards	The expiration of federal net operating loss (“NOL”) carryforwards and their related deferred income tax assets is presented below by year of expiration.
	DOLLARS IN MILLIONS	NOL Carry-forwards			Deferred Tax Asset
	Expiring in:
	2020	$	8.1		$	2.8
	2021 through 2025	30.6			10.8
	2026 through 2030	29.8			10.4
	2031 through 2032	22			7.7
	Total All Years	$	90.5		$	31.7
Reconciliation Of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of Unrecognized Tax Benefits for the years ended December 31, 2014, 2013 and 2012 is as follows:
	DOLLARS IN MILLIONS	2014			2013				2012
	Balance at Beginning of Year	$	6.8		$	6.4			$	6.2
	Additions for Tax Positions of Current Period	0.1			0.1				—
	Additions for Tax Positions of Prior Years	0.3			0.3				0.2
	Balance at End of Year	$	7.2		$	6.8			$	6.4
Schedule of Components of Income Tax Expense (Benefit)	The components of Income Tax Expense from Continuing Operations for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013				2012
	Current Income Tax Expense	$	(41.7	)	$	(49.4	)		$	(43.3	)
	Deferred Income Tax Benefit (Expense)	(5.5		)	(50.1		)		12.9
	Increase Unrecognized Tax Benefits	(0.4		)	(0.4		)		(0.2		)
	Income Tax Expense	$	(47.6	)	$	(99.9	)		$	(30.6	)
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the Statutory Federal Income Tax Expense and Rate to the Company’s Effective Income Tax Expense and Rate from Continuing Operations for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014						2013						2012
		Amount			Rate			Amount				Rate		Amount			Rate
	Statutory Federal Income Tax Expense	$	(56.1	)	35	%		$	(110.0	)		35	%	$	(42.8	)	35	%
	Tax-exempt Income and Dividends Received Deduction	9			(5.6	)		10.6				(3.4	)	13.9			(11.4	)
	State Income Taxes	(0.6		)	0.4			(0.2		)		0.1		(0.8		)	0.7
	Other, Net	0.1			(0.1	)		(0.3		)		0.1		(0.9		)	0.7
	Effective Income Tax Expense from Continuing Operations	$	(47.6	)	29.7	%		$	(99.9	)		31.8	%	$	(30.6	)	25	%
Comprehensive Income Tax Benefit and Expenses	Comprehensive Income Tax Expense included in the Consolidated Financial Statements for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013				2012
	Income Tax Expense:
	Continuing Operations	$	(47.6	)	$	(99.9	)		$	(30.6	)
	Discontinued Operations	(1.1		)	(1.7		)		(7.3		)
	Unrealized Depreciation (Appreciation) on Securities	(82.8		)	129.1				(34.4		)
	Foreign Currency Translation Adjustments on Investments	0.4			(0.1		)		(0.6		)
	Tax Effects from Postretirement Benefit Plans	34.7			(30.4		)		4.6
	Tax Effects from Long-term Equity-based Compensation included in Paid-in Capital	(1.0		)	0.2				(0.1		)
	Comprehensive Income Tax Expense	$	(97.4	)	$	(2.8	)		$	(68.4	)

Pension_Benefits_Tables

Pension Benefits (Tables) (Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Schedule of Changes in Fair Value of Plan Assets	Changes in Fair Value of Plan Assets and Changes in Projected Benefit Obligation for the Pension Plan for the years ended December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS
		2014				2013
	Fair Value of Plan Assets at Beginning of Year	$	524.5			$	457.6
	Actual Return on Plan Assets	41.7				34.5
	Employer Contributions	—				55
	Benefits Paid	(23.2		)		(22.6		)
	Fair Value of Plan Assets at End of Year	543				524.5
	Projected Benefit Obligation at Beginning of Year	515.5				553.9
	Service Cost	8.7				10.8
	Interest Cost	24.8				22.4
	Benefits Paid	(23.2		)		(22.6		)
	Plan Amendments	(0.6		)		—
	Actuarial Losses (Gains)	108.8				(49.0		)
	Projected Benefit Obligation at End of Year	634				515.5
	Funded Status—Plan Assets in Excess (Deficit) of Projected Benefit Obligation	$	(91.0	)		$	9
	Unamortized Amount Reported in AOCI at End of Year:
	Accumulated Actuarial Loss	$	(178.6	)		$	(86.3	)
	Prior Service Credit	0.5				—
	Unamortized Amount Reported in AOCI at End of Year	$	(178.1	)		$	(86.3	)
	Accumulated Benefit Obligation at End of Year	$	608.2			$	496.2
Schedule of Assumptions Used	The weighted-average discount rate and rate of increase in future compensation levels used to estimate the components of the Projected Benefit Obligation for the Pension Plan at December 31, 2014 and 2013 were:
		2014			2013
	Discount Rate	4.1	%		4.9	%
	Rate of Increase in Future Compensation Levels	3.31			3.05
	used to develop the components of Pension Expense for the Pension Plan for the years ended December 31, 2014, 2013 and 2012 were:
		2014			2013			2012
	Discount Rate	4.9	%		4.05	%		4.6	%
	Rate of Increase in Future Compensation Levels	3.05			3.08			3.27
	Expected Long Term Rate of Return on Plan Assets	7			7			7
Schedule of Allocation of Plan Assets	Weighted-average asset allocations for the Pension Plan at December 31, 2014 and 2013 by asset category were:
	ASSET CATEGORY	2014			2013
	Cash and Short-term Investments	4	%		8	%
	Corporate Bonds and Notes	29			27
	Common and Preferred Stocks	43			34
	Exchange Traded Funds	12			22
	Other Assets	12			9
	Total	100	%		100	%
Fair Value, Measurement Inputs, Disclosure	Fair value measurements for the Pension Plan’s assets at December 31, 2014 are summarized below:
	DOLLARS IN MILLIONS	Quoted Prices				Significant				Significant			Fair Value
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	18.4			$	—			$	—		$	18.4
	States and Political Subdivisions	—				3.3				—			3.3
	Corporate Bonds and Notes	—				136.6				—			136.6
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				6.4				—			6.4
	Common Stocks:
	Manufacturing	98.8				15				—			113.8
	Other Industries	79.3				2.3				—			81.6
	Other Equity Interests:
	Collective Investment Funds	—				30				—			30
	Exchange Traded Funds	65.5				—				—			65.5
	Limited Liability Companies and Limited Partnerships	—				—				64.5			64.5
	Short-term Investments	21.5				—				—			21.5
	Receivables and Other	1				—				0.4			1.4
	Total	$	284.5			$	193.6			$	64.9		$	543
	Fair value measurements for the Pension Plan’s assets at December 31, 2013 are summarized below:
	DOLLARS IN MILLIONS	Quoted Prices				Significant				Significant			Fair Value
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	12.1			$	—			$	—		$	12.1
	States and Political Subdivisions	—				3.1				—			3.1
	Corporate Bonds and Notes	—				127				—			127
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				4				—			4
	Common Stocks:
	Manufacturing	97.5				7.8				—			105.3
	Other Industries	67.2				1.8				—			69
	Other Equity Interests:
	Exchange Traded Funds	111.7				—				—			111.7
	Limited Liability Companies and Limited Partnerships	—				—				46.9			46.9
	Short-term Investments	42.6				—				—			42.6
	Receivables and Other	2.3				—				0.5			2.8
	Total	$	333.4			$	143.7			$	47.4		$	524.5
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	The components of Comprehensive Pension Expense (Income) for the Pension Plan for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014				2013				2012
	Service Cost Earned During the Year	$	8.7			$	10.8			$	10.8
	Interest Cost on Projected Benefit Obligation	24.8				22.4				22.4
	Expected Return on Plan Assets	(34.9		)		(29.7		)		(29.8		)
	Amortization of Actuarial Loss	9.7				26.2				18.8
	Settlements	—				—				0.3
	Pension Expense Recognized in Consolidated Statements of Income	8.3				29.7				22.5
	Unrecognized Pension Loss (Gain) Arising During the Year	102				(53.8		)		34.8
	Prior Service Credit Arising During the Year	(0.6		)		—				—
	Amortization of Accumulated Unrecognized Pension Loss	(9.7		)		(26.2		)		(18.8		)
	Comprehensive Pension Expense (Income)	$	100			$	(50.3	)		$	38.5
Schedule of Expected Benefit Payments	The following benefit payments (net of participant contributions), which consider expected future service, as appropriate, are expected to be paid from the Pension Plan:
	DOLLARS IN MILLIONS	Years Ending December 31,
		2015				2016				2017			2018		2019		2020-2024
	Estimated Pension Benefit Payments	$	25.2			$	26.5			$	27.8		$	29.2	$	30.4	$	169.6
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Changes in Fair Value of Plan Assets	Additional information pertaining to the changes in the fair value of the Pension Plan’s assets classified as Level 3 for the year ended December 31, 2013 is presented below:
	DOLLARS IN MILLIONS	Other Equity				Receivables				Total
		Interests				and Other
	Balance at Beginning of Year	$	26.9			$	0.6			$	27.5
	Return on Plan Assets Held	3.5				—				3.5
	Purchases, Sales and Settlements, Net	16.5				(0.1		)		16.4
	Balance at End of Year	$	46.9			$	0.5			$	47.4
	Additional information pertaining to the changes in the fair value of the Pension Plan’s assets classified as Level 3 for the year ended December 31, 2014 is presented below:
	DOLLARS IN MILLIONS	Other Equity				Receivables				Total
		Interests				and Other
	Balance at Beginning of Year	$	46.9			$	0.5			$	47.4
	Return on Plan Assets Held	3.4				—				3.4
	Purchases, Sales and Settlements, Net	14.2				(0.1		)		14.1
	Balance at End of Year	$	64.5			$	0.4			$	64.9

Postretirement_Benefits_Other_1

Postretirement Benefits Other Than Pensions (Tables) (Other Postretirement Benefit Plan, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2014
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Changes in Fair Value of Plan Assets	Changes in Fair Value of Plan Assets and Changes in Accumulated Postretirement Benefit Obligation for the years ended December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS
		2014				2013
	Fair Value of Plan Assets at Beginning of Year	$	—			$	—
	Employer Contributions	3.4				2.9
	Plan Participants’ Contributions	1.2				1.2
	Benefits Paid	(4.6		)		(4.1		)
	Fair Value of Plan Assets at End of Year	—				—
	Accumulated Postretirement Benefit Obligation at Beginning of Year	35.1				42.8
	Service Cost	0.2				0.2
	Interest Cost	1.1				1.2
	Plan Participants’ Contributions	1.2				1.2
	Benefits Paid	(4.6		)		(4.1		)
	Medicare Part D Subsidy Received	0.1				—
	Actuarial Gains	(2.0		)		(6.2		)
	Accumulated Postretirement Benefit Obligation at End of Year	31.1				35.1
	Funded Status—Accumulated Postretirement Benefit Obligation in Excess of Plan Assets	$	(31.1	)		$	(35.1	)
	Unamortized Actuarial Gain Reported in AOCI at End of Year	$	18.6			$	18.4
Schedule of Assumptions Used	The weighted-average discount rate and rate of increase in future compensation levels used to develop the components of the Accumulated Postretirement Benefit Obligation at December 31, 2014 and 2013 were:
		2014			2013
	Discount Rate	3.4	%		4	%
	Rate of Increase in Future Compensation Levels	2.68			2.1
	The weighted-average discount rate and rate of increase in future compensation levels used to develop OPEB Expense for the years ended December 31, 2014, 2013 and 2012 were:
		2014			2013			2012
	Discount Rate	4	%		3.15	%		4.25	%
	Rate of Increase in Future Compensation Levels	2.1			2.1			2.1
Schedule of Comprehensive Other Postretirement Employee Benefit Expense	The components of Comprehensive OPEB Income for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014				2013				2012
	Service Cost Earned During the Year	$	0.2			$	0.2			$	0.2
	Interest Cost on Accumulated Postretirement Benefit Obligation	1.1				1.2				1.6
	Amortization of Actuarial Gain	(1.8		)		(1.2		)		(1.2		)
	OPEB Expense (Income) Recognized in Consolidated Statements of Income	(0.5		)		0.2				0.6
	Unrecognized OPEB Gain Arising During the Year	(2.0		)		(6.2		)		(5.5		)
	Amortization of Accumulated Unrecognized OPEB Gain	1.8				1.2				1.2
	Comprehensive OPEB Income	$	(0.7	)		$	(4.8	)		$	(3.7	)
Schedule of Expected Benefit Payments	The following benefit payments (net of participant contributions), which consider expected future service, as appropriate, are expected to be paid:
	DOLLARS IN MILLIONS	Years Ending December 31,
		2015				2016				2017			2018			2019			2020-2024
	Estimated Benefit Payments:
	Excluding Medicare Part D Subsidy	$	3.6			$	3.7			$	3.6		$	3.5		$	3.4		$	13.8
	Expected Medicare Part D Subsidy	(0.4		)		(0.4		)		(0.4		)	(0.4		)	(0.4		)	(1.6		)
	Net Estimated Benefit Payments	$	3.2			$	3.3			$	3.2		$	3.1		$	3		$	12.2

Business_Segments_Tables

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Assets	Segment Assets at December 31, 2014 and 2013 were:
	DOLLARS IN MILLIONS	2014			2013
	Property & Casualty Insurance	$	2,486.10		$	2,648.60
	Life & Health Insurance	4,810.60			4,545.60
	Corporate and Other, Net	536.7			462.2
	Total Assets	$	7,833.40		$	7,656.40
Earned Premiums by Product Line	Earned Premiums by product line for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Personal Automobile	$	831.4		$	959.1		$	1,050.10
	Homeowners	312.4			326.2			318
	Other Personal Property and Casualty Insurance	127.4			134.1			136.9
	Commercial Automobile	54.8			52.3			43.5
	Life	387.6			392.7			393.4
	Accident and Health	148.6			161.4			165.2
	Total Earned Premiums	$	1,862.20		$	2,025.80		$	2,107.10
Segment Revenues	Segment Revenues, including a reconciliation to Total Revenues, for the years ended December 31, 2014, 2013 and 2012 were:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Revenues:
	Property & Casualty Insurance:
	Earned Premiums	$	1,249.50		$	1,392.90		$	1,467.20
	Net Investment Income	72.7			90.9			77.9
	Other Income	0.5			0.5			0.7
	Total Property & Casualty Insurance	1,322.70			1,484.30			1,545.80
	Life & Health Insurance:
	Earned Premiums	612.7			632.9			639.9
	Net Investment Income	218.7			209.9			204.3
	Other Income	0.9			0.2			0.1
	Total Life & Health Insurance	832.3			843			844.3
	Total Segment Revenues	2,155.00			2,327.30			2,390.10
	Net Realized Gains on the Sales of Investments	39.1			99.1			65.4
	Net Impairment Losses Recognized in Earnings	(15.2		)	(13.9		)	(6.9		)
	Other	17.7			14			13.7
	Total Revenues	$	2,196.60		$	2,426.50		$	2,462.30
Segment Operating Profit	Segment Operating Profit (Loss), including a reconciliation to Income from Continuing Operations before Income Taxes, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Operating Profit (Loss):
	Property & Casualty Insurance	$	27.1		$	139.6		$	(35.6	)
	Life & Health Insurance	141.9			136.9			140.4
	Total Segment Operating Profit	169			276.5			104.8
	Corporate and Other Operating Loss	(32.7		)	(47.3		)	(40.9		)
	Total Operating Profit	136.3			229.2			63.9
	Net Realized Gains on Sales of Investments	39.1			99.1			65.4
	Net Impairment Losses Recognized in Earnings	(15.2		)	(13.9		)	(6.9		)
	Income from Continuing Operations before Income Taxes	$	160.2		$	314.4		$	122.4
Segment Net Income (Loss)	Segment Net Operating Income (Loss), including a reconciliation to Income from Continuing Operations, for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Segment Net Operating Income (Loss):
	Property & Casualty Insurance	$	24.9		$	100.6		$	(10.9	)
	Life & Health Insurance	91.8			89.3			90.8
	Total Segment Net Operating Income	116.7			189.9			79.9
	Corporate and Other Net Operating Loss	(19.6		)	(30.7		)	(26.1		)
	Consolidated Net Operating Income	97.1			159.2			53.8
	Net Income (Loss) From:
	Net Realized Gains on Sales of Investments	25.4			64.4			42.5
	Net Impairment Losses Recognized in Earnings	(9.9		)	(9.1		)	(4.5		)
	Income from Continuing Operations	$	112.6		$	214.5		$	91.8
Segment Amortization of Deferred Policy Acquisition Costs	Amortization of Deferred Policy Acquisition Costs by Operating Segment for the years ended December 31, 2014, 2013 and 2012 was:
	DOLLARS IN MILLIONS	2014			2013			2012
	Property & Casualty Insurance	$	187.5		$	207.2		$	212.6
	Life & Health Insurance	47.9			46.7			44.4
	Total Amortization	$	235.4		$	253.9		$	257

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	Summary financial information included in Income from Discontinued Operations for the years ended December 31, 2014, 2013 and 2012 is presented below.
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	2014			2013			2012
	Income (Loss) from Discontinued Operations before Income Taxes:
	Results of Operations	$	—		$	—		$	(0.2	)
	Gain on Sale of Loan Portfolio	—			—			12.9
	Change in Estimate of Retained Liabilities Arising from Discontinued Operations	3			4.9			6.2
	Income from Discontinued Operations before Income Taxes	3			4.9			18.9
	Income Tax Expense	(1.1		)	(1.7		)	(7.3		)
	Income from Discontinued Operations	$	1.9		$	3.2		$	11.6
	Income from Discontinued Operations Per Unrestricted Share:
	Basic	$	0.04		$	0.06		$	0.2
	Diluted	$	0.04		$	0.06		$	0.2

Catastrophe_Reinsurance_Tables

Catastrophe Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2014
Reinsurance Disclosures [Abstract]
Reinsurance Retention Policy	Coverage for the Property & Casualty Insurance segment’s primary catastrophe reinsurance program effective January 1, 2013 to December 31, 2013 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		65
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		350		90
	4th Layer of Coverage	350		450		50
	Coverage for the Property & Casualty Insurance segment’s primary catastrophe reinsurance program effective January 1, 2014 to December 31, 2014 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Property & Casualty Insurance Segment:
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		95
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		400		95
	Coverage for the Company’s primary catastrophe reinsurance program effective January 1, 2012 to December 31, 2012 is provided in various layers as presented below:
	DOLLARS IN MILLIONS	Catastrophe Losses and				Percentage
		LAE				of Coverage
		In Excess of		Up to
	Property & Casualty Insurance Segment:
	Retained	$	—	$	50	—	%
	1st Layer of Coverage	50		100		65
	2nd Layer of Coverage	100		200		95
	3rd Layer of Coverage	200		350		90
	4th Layer of Coverage	350		450		50
	Life & Health Segment—Property Insurance Operations:
	Retained	$	—	$	8	—	%
	1st Layer of Coverage	8		15		70
	2nd Layer of Coverage	15		40		70
Catastrophe Reinsurance Premiums	Reinsurance premiums for the Company’s primary catastrophe reinsurance programs, the NC Program and the FHCF Program reduced earned premiums for the years ended December 31, 2014, 2013 and 2012 by the following:
	DOLLARS IN MILLIONS	2014		2013		2012
	Property & Casualty Insurance	$	17.6	$	23.6	$	25.1
	Life & Health Insurance	0.1		—		2
	Total Ceded Catastrophe Reinsurance Premiums	$	17.7	$	23.6	$	27.1
Catastrophe Losses and LAE, Net Reinsurance Recoveries	Catastrophe losses and LAE (including reserve development), net of reinsurance recoveries, for the years ended December 31, 2014, 2013 and 2012 by business segment are presented below.
	DOLLARS IN MILLIONS	2014		2013		2012
	Property & Casualty Insurance	$	80.7	$	34.6	$	112.1
	Life & Health Insurance	3.1		1.6		6.1
	Total Catastrophe Losses and LAE	$	83.8	$	36.2	$	118.2

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	The valuation of assets measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2014 is summarized below:
	DOLLARS IN MILLIONS	Fair Value Measurements											Fair Value
		Quoted Prices				Significant				Significant
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	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
	At December 31, 2014, the Company had unfunded commitments to invest an additional $97.9 million in certain limited liability investment companies and limited partnerships that will be included in Other Equity Interests when funded.
	NOTE 21. FAIR VALUE MEASUREMENTS (Continued)
	The valuation of assets measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2013 is summarized below:
	DOLLARS IN MILLIONS	Fair Value Measurements											Fair Value
		Quoted Prices				Significant				Significant
		in Active Markets				Other				Unobservable
		for Identical				Observable				Inputs
		Assets				Inputs				(Level 3)
		(Level 1)				(Level 2)
	Fixed Maturities:
	U.S. Government and Government Agencies and Authorities	$	121.2			$	241			$	—		$	362.2
	States and Political Subdivisions	—				1,361.00				—			1,361.00
	Corporate Securities:
	Bonds and Notes	—				2,429.60				364.1			2,793.70
	Redeemable Preferred Stocks	—				—				7.4			7.4
	Collateralized Loan Obligations	—				—				44.7			44.7
	Other Mortgage- and Asset-backed	—				1.5				4.5			6
	Total Investments in Fixed Maturities	121.2				4,033.10				420.7			4,575.00
	Equity Securities:
	Preferred Stocks:
	Finance, Insurance and Real Estate	—				80.8				5			85.8
	Other Industries	—				10.5				13.9			24.4
	Common Stocks:
	Manufacturing	95.1				7.3				2.2			104.6
	Other Industries	71.7				2.2				11			84.9
	Other Equity Interests:
	Exchange Traded Funds	124.9				—				—			124.9
	Limited Liability Companies and Limited Partnerships	—				—				173.9			173.9
	Total Investments in Equity Securities	291.7				100.8				206			598.5
	Other Investments:
	Trading Securities	5				—				—			5
	Total	$	417.9			$	4,133.90			$	626.7		$	5,178.50
Fair Value Inputs, Assets, Quantitative Information	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	Various		21.6
	Total Fixed Maturity Investments in Corporate Securities			$	435.6
	The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2013.
	DOLLARS IN MILLIONS	Unobservable Input		Total Fair Value				Range of Unobservable Inputs					Weighted Average Yield
	Investment-grade	Market Yield		$	108.5			1	%	-	6	%	4.3	%
	Non-investment-grade:
	Senior Debt	Market Yield		93.9				4.2		-	15.6		8.6
	Junior Debt	Market Yield		153.5				8.8		-	26.6		14.2
	Collateralized Loan Obligations	Market Yield		44.7				3.2		-	6.8		4.3
	Other	Various		20.1
	Total Fixed Maturity Investments in Corporate Securities			$	420.7
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the year ended December 31, 2013 is presented below:
	DOLLARS IN MILLIONS	Fixed Maturities														Equity Securities						Total
		Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other
		Bonds				Preferred							and Asset-			and			Equity
		and				Stocks							backed			Common			Interests
		Notes														Stocks
	Balance at Beginning of Year	$	361			$	4.7			$	—		$	0.1		$	13.3		$	141.3		$	520.4
	Total Gains (Losses):
	Included in Consolidated Statement of Income	(7.9		)		0.2				0.2			0.1			(1.0		)	(1.6		)	(10.0		)
	Included in Other Comprehensive Income	(7.8		)		(1.3		)		0.4			(0.5		)	4.6			5.6			1
	Purchases	145.1				5.1				44.1			4.5			15.9			55.4			270.1
	Settlements	(123.2		)		(1.3		)		—			(0.1		)	—			(26.8		)	(151.4		)
	Sales	(0.1		)		—				—			(2.0		)	(0.7		)	—			(2.8		)
	Transfers into Level 3	5.8				—				—			2.4			—			—			8.2
	Transfers out of Level 3	(8.8		)		—				—			—			—			—			(8.8		)
	Balance at End of Year	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	626.7
	Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the year ended December 31, 2014 is presented below:
	DOLLARS IN MILLIONS	Fixed Maturities														Equity Securities
		Corporate				Redeemable				Collateralized Loan Obligations			Other Mortgage-			Preferred			Other			Fair Value Option			Total
		Bonds				Preferred							and Asset-			and			Equity
		and				Stocks							backed			Common			Interests
		Notes														Stocks
	Balance at Beginning of Year	$	364.1			$	7.4			$	44.7		$	4.5		$	32.1		$	173.9		$	—		$	626.7
	Total Gains (Losses):
	Included in Consolidated Statement of Income	(3.4		)		—				0.2			0.1			1.1			2.7			(0.7		)	—
	Included in Other Comprehensive Income	5.1				(0.1		)		(1.0		)	0.1			0.5			2.2			—			6.8
	Purchases	201.4				—				26.1			—			8.9			53			58			347.4
	Settlements	(126.4		)		(0.6		)		—			(0.8		)	(4.5		)	(39.8		)	—			(172.1		)
	Sales	(79.0		)		—				(5.6		)	—			(2.2		)	(5.8		)	(4.0		)	(96.6		)
	Transfers into Level 3	—				—				—			—			3.6			—			—			3.6
	Transfers out of Level 3	(1.2		)		—				—			—			(0.7		)	—			—			(1.9		)
	Balance at End of Year	$	360.6			$	6.7			$	64.4		$	3.9		$	38.8		$	186.2		$	53.3		$	713.9

Quarterly_Financial_Informatio1

Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Schedule of Quarterly Financial Information
		Three Months Ended (Unaudited)												Year Ended
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	Mar 31,			Jun 30,			Sep 30,			Dec 31,			Dec 31,
		2014			2014			2014			2014			2014
	Revenues:
	Earned Premiums	$	477.6		$	470.3		$	462.8		$	451.5		$	1,862.20
	Net Investment Income	71.1			72.6			72.3			93.1			309.1
	Other Income	0.1			0.2			0.5			0.6			1.4
	Net Realized Gains on Sales of Investments	6.6			3.5			8			21			39.1
	Other-than-temporary Impairment Losses:
	Total Other-than-temporary Impairment Losses	(0.8		)	(4.1		)	(3.8		)	(6.5		)	(15.2		)
	Portion of Losses Recognized in Other Comprehensive Income	—			—			—			—			—
	Net Impairment Losses Recognized in Earnings	(0.8		)	(4.1		)	(3.8		)	(6.5		)	(15.2		)
	Total Revenues	554.6			542.5			539.8			559.7			2,196.60
	Expenses:
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	327.9			347.5			300.5			285.8			1,261.70
	Insurance Expenses	152.1			161.3			158.6			156.4			628.4
	Write-off of Long-lived Asset	—			—			54.6			—			54.6
	Interest and Other Expenses	22.7			22.5			22.1			24.4			91.7
	Total Expenses	502.7			531.3			535.8			466.6			2,036.40
	Income from Continuing Operations before Income Taxes	51.9			11.2			4			93.1			160.2
	Income Tax Benefit (Expense)	(16.7		)	(1.9		)	0.8			(29.8		)	(47.6		)
	Income from Continuing Operations	35.2			9.3			4.8			63.3			112.6
	Income (Loss) from Discontinued Operations	(0.1		)	—			(0.1		)	2.1			1.9
	Net Income	$	35.1		$	9.3		$	4.7		$	65.4		$	114.5
	Income from Continuing Operations Per Unrestricted Share:
	Basic	$	0.63		$	0.17		$	0.09		$	1.2		$	2.08
	Diluted	$	0.63		$	0.17		$	0.09		$	1.2		$	2.08
	Net Income Per Unrestricted Share:
	Basic	$	0.63		$	0.17		$	0.09		$	1.24		$	2.12
	Diluted	$	0.63		$	0.17		$	0.09		$	1.24		$	2.12
	Dividends Paid to Shareholders Per Share	$	0.24		$	0.24		$	0.24		$	0.24		$	0.96
	The sum of quarterly per share amounts does not equal per share amounts for the year due to differences in weighted-average shares and/or equivalent shares outstanding for each of the periods presented.
	NOTE 24. QUARTERLY FINANCIAL INFORMATION (Unaudited) (Continued)
		Three Months Ended (Unaudited)												Year Ended
	DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS	Mar 31,			Jun 30,			Sep 30,			Dec 31,			Dec 31,
		2013			2013			2013			2013			2013
	Revenues:
	Earned Premiums	$	509.9		$	512.8		$	507.5		$	495.6		$	2,025.80
	Net Investment Income	80.8			74.6			82.4			76.9			314.7
	Other Income	0.2			0.2			0.1			0.3			0.8
	Net Realized Gains on Sales of Investments	26.9			2.3			49.1			20.8			99.1
	Other-than-temporary Impairment Losses:
	Total Other-than-temporary Impairment Losses	(2.4		)	(2.3		)	(3.5		)	(7.6		)	(15.8		)
	Portion of Losses Recognized in Other Comprehensive Income	0.5			1.3			0.1			—			1.9
	Net Impairment Losses Recognized in Earnings	(1.9		)	(1.0		)	(3.4		)	(7.6		)	(13.9		)
	Total Revenues	615.9			588.9			635.7			586			2,426.50
	Expenses:
	Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	349.2			354.2			338.3			315.5			1,357.20
	Insurance Expenses	158.3			163.1			170.1			162.9			654.4
	Interest and Other Expenses	23.8			25.2			25.3			26.2			100.5
	Total Expenses	531.3			542.5			533.7			504.6			2,112.10
	Income from Continuing Operations before Income Taxes	84.6			46.4			102			81.4			314.4
	Income Tax Expense	(26.0		)	(13.9		)	(33.4		)	(26.6		)	(99.9		)
	Income from Continuing Operations	58.6			32.5			68.6			54.8			214.5
	Income (Loss) from Discontinued Operations	(0.2		)	1.5			1.5			0.4			3.2
	Net Income	$	58.4		$	34		$	70.1		$	55.2		$	217.7
	Income from Continuing Operations Per Unrestricted Share:
	Basic	$	1		$	0.56		$	1.21		$	0.98		$	3.75
	Diluted	$	1		$	0.56		$	1.21		$	0.98		$	3.74
	Net Income Per Unrestricted Share:
	Basic	$	1		$	0.59		$	1.24		$	0.99		$	3.81
	Diluted	$	1		$	0.59		$	1.23		$	0.99		$	3.8
	Dividends Paid to Shareholders Per Share	$	0.24		$	0.24		$	0.24		$	0.24		$	0.96
The sum of quarterly per share amounts does not equal per share amounts for the year due to differences in weighted-average shares and/or equivalent shares outstanding for each of the periods presented.

Summary_Of_Accounting_Policies2

Summary Of Accounting Policies And Accounting Changes (Details) (USD $)	3 Months Ended				12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policy Disclosures [Line Items]
Interest rate assumption, minimum					3.00%
Interest rate assumption, maximum					7.00%
Write-off of long-lived asset	$0	$54.60	$0	$0	$54.60	$0	$0
Charge for goodwill impairment included in insurance expenses						1.4
Life Insurance Product Line [Member]
Accounting Policy Disclosures [Line Items]
Present value of the future profits embedded in life insurance in force	36.5				36.5	41.2
Expected Amortization Expense of Ending Present Value of Future Insurance Profits, Net of Interest Accrued [Abstract]
2015					4.2
2016					3.7
2017					3.2
2018					2.9
2019					2.4
Property and Casualty Insurance [Member]
Accounting Policy Disclosures [Line Items]
Present value of the future profits embedded in life insurance in force	$13.30				$13.30	$15.80

Investments_Amortized_Cost_and

Investments - Amortized Cost and Estimated Fair Value of investments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$4,341.70	$4,370.50
Gross Unrealized Gains	455.6	284.2
Gross Unrealized Losses	-19.7	-79.7
Fair Value	4,777.60	4,575
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	315.2	351.1
Gross Unrealized Gains	32.3	22.8
Gross Unrealized Losses	-2	-11.7
Fair Value	345.5	362.2
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,352.50	1,327.40
Gross Unrealized Gains	126.4	53.8
Gross Unrealized Losses	-1.8	-20.2
Fair Value	1,477.10	1,361
Corporate Bonds and Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,599.30	2,636.40
Gross Unrealized Gains	294.3	205
Gross Unrealized Losses	-15.1	-47.7
Fair Value	2,878.50	2,793.70
Redeemable Preferred Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5.9	6.6
Gross Unrealized Gains	0.8	0.8
Gross Unrealized Losses	0	0
Fair Value	6.7	7.4
Collateralized Loan Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	64.9	44.2
Gross Unrealized Gains	0.3	0.5
Gross Unrealized Losses	-0.8	0
Fair Value	64.4	44.7
Other Mortgage and Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3.9	4.8
Gross Unrealized Gains	1.5	1.3
Gross Unrealized Losses	0	-0.1
Fair Value	5.4	6
Collateralized Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	3.9	4.6
Non-governmental Residential Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1.3	1.2
Other Asset Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$0.20	$0.20

Investments_Schedule_of_Contra

Investments - Schedule of Contractual Maturity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Due in One Year or Less, Amortized Cost	$51
Due in One Year or Less, Fair Value	52.7
Due after One Year to Five Years, Amortized Cost	769.6
Due after One Year to Five Years, Fair Value	820.2
Due after Five Years to Ten Years, Amortized Cost	1,340.70
Due after Five Years to Ten Years, Fair Value	1,398
Due after Ten Years, Amortized Cost	1,979.40
Due after Ten Years, Fair Value	2,294.30
Asset-backed Securities Not Due at a Single Maturity Date, Amortized Cost	201
Asset-backed Securities Not Due at a Single Maturity Date, Fair Value	212.4
Amortized Cost	4,341.70	4,370.50
Investments in Fixed Maturities, Fair Value	4,777.60	4,575
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]
Schedule of Available-for-sale Securities [Line Items]
Asset-backed Securities Not Due at a Single Maturity Date, Fair Value	133.1
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]
Schedule of Available-for-sale Securities [Line Items]
Asset-backed Securities Not Due at a Single Maturity Date, Fair Value	9.2
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]
Schedule of Available-for-sale Securities [Line Items]
Asset-backed Securities Not Due at a Single Maturity Date, Fair Value	0.3
Other Non-Governmental Issuers [Member]
Schedule of Available-for-sale Securities [Line Items]
Asset-backed Securities Not Due at a Single Maturity Date, Fair Value	$69.80

Investments_Unrealized_Gains_a

Investments - Unrealized Gains and Gross Unrealized Losses in Investment in Equity Securities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	$561.50	$530
Gross Unrealized Gains	75.7	74.7
Gross Unrealized Losses	-5	-6.2
Equity Securities at Fair Value	632.2	598.5
Exchange Traded Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	195.2	122
Gross Unrealized Gains	8.2	3.9
Gross Unrealized Losses	-0.7	-1
Equity Securities at Fair Value	202.7	124.9
Limited Liability Companies and Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	160.3	150.3
Gross Unrealized Gains	27.7	25.2
Gross Unrealized Losses	-1.8	-1.6
Equity Securities at Fair Value	186.2	173.9
Finance, Insurance and Real Estate [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	85.5	85.4
Gross Unrealized Gains	5.2	2.9
Gross Unrealized Losses	-1	-2.5
Equity Securities at Fair Value	89.7	85.8
All Industries Other than Finance, Insurance and Real Estate [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	16.3	20.1
Gross Unrealized Gains	3.5	4.4
Gross Unrealized Losses	0	-0.1
Equity Securities at Fair Value	19.8	24.4
2000 to 3999 Manufacturing [Member] | Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	43.4	83.4
Gross Unrealized Gains	14.9	21.3
Gross Unrealized Losses	-1.1	-0.1
Equity Securities at Fair Value	57.2	104.6
All Industries Other than Manufacturing [Member] | Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities at Cost	60.8	68.8
Gross Unrealized Gains	16.2	17
Gross Unrealized Losses	-0.4	-0.9
Equity Securities at Fair Value	$76.60	$84.90

Investments_Aging_of_Unrealize

Investments - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Unsettled purchases or sales of Investments in fixed maturities	$409,600,000	$329,800,000
Other receivables	187,000,000	193,100,000
Fair Value
Less Than 12 Months	423,600,000	1,199,100,000
12 Months or Longer	580,700,000	119,600,000
Total	1,004,300,000	1,318,700,000
Unrealized Losses
Less Than 12 Months	-9,700,000	-76,000,000
12 Months or Longer	-15,000,000	-9,900,000
Total	-24,700,000	-85,900,000
Unrealized losses related to securities for which the Company has recognized credit losses in earnings	0	0
Securities that have had recognized credit losses in earnings, aggregate losses		-300,000
US Government and Government Agencies and Authorities [Member]
Fair Value
Less Than 12 Months	24,900,000	95,800,000
12 Months or Longer	55,500,000	4,400,000
Total	80,400,000	100,200,000
Unrealized Losses
Less Than 12 Months	-700,000	-10,900,000
12 Months or Longer	-1,300,000	-800,000
Total	-2,000,000	-11,700,000
States and Political Subdivisions [Member]
Fair Value
Less Than 12 Months	1,000,000	222,900,000
12 Months or Longer	126,300,000	2,000,000
Total	127,300,000	224,900,000
Unrealized Losses
Less Than 12 Months	0	-20,100,000
12 Months or Longer	-1,800,000	-100,000
Total	-1,800,000	-20,200,000
Corporate Bonds and Notes [Member]
Fair Value
Less Than 12 Months	250,400,000	699,800,000
12 Months or Longer	360,500,000	103,200,000
Total	610,900,000	803,000,000
Unrealized Losses
Less Than 12 Months	-5,100,000	-39,400,000
12 Months or Longer	-10,000,000	-8,300,000
Total	-15,100,000	-47,700,000
Collateralized Loan Obligations [Member]
Fair Value
Less Than 12 Months	51,200,000
12 Months or Longer	3,400,000
Total	54,600,000
Unrealized Losses
Less Than 12 Months	-700,000
12 Months or Longer	-100,000
Total	-800,000
Other Mortgage and Asset-backed Securities [Member]
Fair Value
Less Than 12 Months	0	13,900,000
12 Months or Longer	400,000	1,100,000
Total	400,000	15,000,000
Unrealized Losses
Less Than 12 Months	0	-100,000
12 Months or Longer	0	0
Total	0	-100,000
Investments in Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unsettled purchases or sales of Investments in fixed maturities	0	0
Other receivables		2,500,000
Fair Value
Less Than 12 Months	327,500,000	1,032,400,000
12 Months or Longer	546,100,000	110,700,000
Total	873,600,000	1,143,100,000
Unrealized Losses
Less Than 12 Months	-6,500,000	-70,500,000
12 Months or Longer	-13,200,000	-9,200,000
Total	-19,700,000	-79,700,000
Investments in Fixed Maturities [Member] | External Credit Rating, Investment Grade [Member]
Unrealized Losses
Total	-14,100,000	-74,200,000
Investments in Fixed Maturities [Member] | External Credit Rating, Non Investment Grade [Member]
Unrealized Losses
Total	-5,600,000	-5,500,000
Percentage of unrealized loss position to amortized cost basis of available for sale security average	4.00%	5.00%
Preferred Stock [Member] | Finance, Insurance and Real Estate [Member]
Fair Value
Less Than 12 Months	7,500,000	22,500,000
12 Months or Longer	12,100,000	2,500,000
Total	19,600,000	25,000,000
Unrealized Losses
Less Than 12 Months	-100,000	-2,500,000
12 Months or Longer	-900,000	0
Total	-1,000,000	-2,500,000
Preferred Stock [Member] | All Industries Other than Finance, Insurance and Real Estate [Member]
Fair Value
Less Than 12 Months	0	4,300,000
12 Months or Longer	500,000	700,000
Total	500,000	5,000,000
Unrealized Losses
Less Than 12 Months	0	-100,000
12 Months or Longer	0	0
Total	0	-100,000
Common Stock [Member] | 2000 to 3999 Manufacturing [Member]
Fair Value
Less Than 12 Months	15,100,000	5,000,000
12 Months or Longer	0	200,000
Total	15,100,000	5,200,000
Unrealized Losses
Less Than 12 Months	-1,100,000	-100,000
12 Months or Longer	0	0
Total	-1,100,000	-100,000
Common Stock [Member] | All Industries Other than Manufacturing [Member]
Fair Value
Less Than 12 Months	4,200,000	14,200,000
12 Months or Longer	1,000,000	500,000
Total	5,200,000	14,700,000
Unrealized Losses
Less Than 12 Months	-400,000	-900,000
12 Months or Longer	0	0
Total	-400,000	-900,000
Exchange Traded Funds [Member]
Fair Value
Less Than 12 Months	14,900,000	67,600,000
12 Months or Longer	14,400,000	0
Total	29,300,000	67,600,000
Unrealized Losses
Less Than 12 Months	-100,000	-1,000,000
12 Months or Longer	-600,000	0
Total	-700,000	-1,000,000
Limited Liability Companies and Limited Partnerships [Member]
Fair Value
Less Than 12 Months	54,400,000	53,100,000
12 Months or Longer	6,600,000	5,000,000
Total	61,000,000	58,100,000
Unrealized Losses
Less Than 12 Months	-1,500,000	-900,000
12 Months or Longer	-300,000	-700,000
Total	-1,800,000	-1,600,000
Equity Securities [Member]
Fair Value
Less Than 12 Months	96,100,000	166,700,000
12 Months or Longer	34,600,000	8,900,000
Total	130,700,000	175,600,000
Unrealized Losses
Less Than 12 Months	-3,200,000	-5,500,000
12 Months or Longer	-1,800,000	-700,000
Total	($5,000,000)	($6,200,000)

Investments_OTTI_losses_Recogn

Investments - OTTI losses Recognized in Accumulated Other Comprehensive Income (Details) (Fixed Maturities [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fixed Maturities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at Beginning of Year	$9.90	$4.60	$3.90
Additions for Previously Unrecognized OTTI Credit Losses	2.4	1.8	1.1
Increases to Previously Recognized OTTI Credit Losses	0.6	7.3	0
Reductions to Previously Recognized OTTI Credit Losses	0	0	-0.1
Reduction due to Intent to Sell Investments	-2.4	-3.2	0
Reductions for Investments Sold During Period	-5.2	-0.6	-0.3
Balance at End of Year	$5.30	$9.90	$4.60

Investments_Equity_Method_LLCs

Investments - Equity Method LLCs (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]
Equity method limited liability investments at cost plus cumulative undistributed earnings	$184.80	$245.10
Outstanding commitments to fund equity method limited liability investments	$37.70

Investments_Other_Investments_

Investments - Other Investments Carrying Values (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]
Loans to Policyholders at Unpaid Principal	$283.40	$275.40
Real Estate at Depreciated Cost	160.9	167.1
Trading Securities at Fair Value	4.9	5
Other	0.4	0.5
Total Investments	$449.60	$448

Goodwill_Details

Goodwill (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Goodwill [Roll Forward]
Goodwill	$311.80	$311.80
Property and Casualty Insurance [Member]
Goodwill [Roll Forward]
Goodwill	92.4	92.4
Life and Health Insurance [Member]
Goodwill [Roll Forward]
Goodwill	$219.40	$219.40

Property_and_Casualty_Insuranc2

Property and Casualty Insurance Reserves (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Beginning Property and Casualty Insurance Reserves: [Abstract]
Property and Casualty Insurance Reserves, Gross of Reinsurance at Beginning of Year	$843.50	$970.60	$1,029.10
Less Reinsurance Recoverables and Indemnification at Beginning of Year	63.4	66.2	74.5
Property and Casualty Insurance Reserves, Net of Reinsurance and Indemnification at Beginning of Year	780.1	904.4	954.6
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-57.1	-64.6	-31.5
Total Incurred Losses and LAE	908.3	991.9	1,221.60
Paid Losses and LAE related to:
Prior Years - Paid Losses and LAE	369.6	434	470.4
Total Paid Losses and LAE	1,009.40	1,116.20	1,271.80
Property and Casualty Insurance Reserves, Net of Reinsurance and Indemnification at End of Year	679	780.1	904.4
Plus Reinsurance and Indemnification Recoverables at End of Year	54.9	63.4	66.2
Property and Casualty Insurance Reserves, Gross of Reinsurance at End of Year	733.9	843.5	970.6
Personal Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-50.9	56.8	12.6
Commercial Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-6.2	7.8	18.9
Segment, Continuing Operations [Member]
Incurred Losses and LAE related to:
Current Year - Incurred Losses and LAE	965.4	1,056.50	1,253.10
Prior Years - Incurred Losses and LAE	-53.5	-59.8	-25.2
Paid Losses and LAE related to:
Current Year - Paid Losses and LAE	639.8	682.2	801.4
Prior Years - Paid Losses and LAE	360.4	421.7	451.2
Segment, Continuing Operations [Member] | Commercial Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-2.6	3	12.6
Segment, Discontinued Operations [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-3.6	-4.8	-6.3
Paid Losses and LAE related to:
Prior Years - Paid Losses and LAE	9.2	12.3	19.2
Segment, Discontinued Operations [Member] | Commercial Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-3.6	4.8	6.3
Personal Automobile [Member] | Personal Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	31.6	30.1	-2.2
Homeowners [Member] | Personal Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	-14.8	-20.1	11.7
Other Personal Lines [Member] | Personal Lines [Member]
Incurred Losses and LAE related to:
Prior Years - Incurred Losses and LAE	($4.50)	$6.60	$3.10

Debt_Debt_Outstanding_Details

Debt - Debt Outstanding (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]
Notes Payable	$752.10	$606.90
Senior Notes [Member] | Senior Notes, 6% Due November 30, 2015 [Member]
Debt Instrument [Line Items]
Notes Payable	249.5	249
Senior Notes [Member] | Senior Notes, 6% Due May 15, 2017 [Member]
Debt Instrument [Line Items]
Notes Payable	358.5	357.9
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Debt Instrument [Line Items]
Notes Payable	$144.10	$0

Debt_Interest_Expense_on_Debt_

Debt - Interest Expense on Debt (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Interest Costs Incurred	$47.90	$39.20	$39.80
Capitalization of Interest	-1	-0.9	-1.8
Total Interest Expense	46.9	38.3	38
Senior Notes [Member] | Senior Notes, 6% Due November 30, 2015 [Member]
Debt Instrument [Line Items]
Interest Costs Incurred	15.5	15.4	15.4
Senior Notes [Member] | Senior Notes, 6% Due May 15, 2017 [Member]
Debt Instrument [Line Items]
Interest Costs Incurred	22.2	22.2	22.1
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Debt Instrument [Line Items]
Interest Costs Incurred	9.4	0	0
Mortgage Note Payable [Member]
Debt Instrument [Line Items]
Interest Costs Incurred	0	0.2	0.4
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Costs Incurred	$0.80	$1.40	$1.90

Debt_Interest_Paid_on_Debt_Det

Debt - Interest Paid on Debt (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Interest Paid	$45.70	$37.70	$39.30
Senior Notes [Member] | Senior Notes, 6% Due November 30, 2015 [Member]
Debt Instrument [Line Items]
Interest Paid	15	15	15
Senior Notes [Member] | Senior Notes, 6% Due May 15, 2017 [Member]
Debt Instrument [Line Items]
Interest Paid	21.6	21.6	21.6
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Debt Instrument [Line Items]
Interest Paid	8.5	0	0
Mortgage Note Payable [Member]
Debt Instrument [Line Items]
Interest Paid	0	0.3	0.4
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Paid	$0.60	$0.80	$2.30

Debt_Details

Debt (Details) (USD $)	12 Months Ended	0 Months Ended		12 Months Ended
	Dec. 31, 2014	Feb. 27, 2014	Nov. 24, 2010	Dec. 31, 2007	Dec. 31, 2013
Debt Instrument [Line Items]
Advances from FLHB	$0				$0
Notes Payable under Revolving Credit Agreement | 2016 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, length of agreement	4 years
Line of credit, outstanding	0				0
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		150,000,000
Stated interest rate, percentage	7.38%
Issuance costs		144,000,000
Interest rate, effective percentage		7.69%
Senior Notes [Member] | Senior Notes, 6% Due November 30, 2015 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			250,000,000
Stated interest rate, percentage	6.00%
Issuance costs			247,800,000
Interest rate, effective percentage			6.21%
Senior Notes [Member] | Senior Notes, 6% Due May 15, 2017 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				360,000,000
Stated interest rate, percentage	6.00%
Issuance costs				354,800,000
Interest rate, effective percentage				6.19%
Revolving Credit Facility [Member] | 2016 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$225,000,000

Leases_Details

Leases (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leases, Rent Expense, Net [Abstract]
Minimum Rental Expense	$21.50	$28.30	$33.20
Less: Sublease Rental Income	-1.3	-1.8	-2.5
Net Rental Exense	20.2	26.5	30.7
Future Minimum Lease Payments, Capital and Operating Leases
Capital Leases, Future Minimum Payments Due, 2013	1.9
Capital Leases, Future Minimum Payments Due, 2014	1.9
Capital Leases, Future Minimum Payments Due, 2015	0.6
Capital Leases, Future Minimum Payments Due, 2016	0.1
Capital Leases, Future Minimum Payments Due, 2017	0
Capital Leases, Future Minimum Payments Due, 2018 and Thereafter	0
Capital Leases, Total Future Payments	4.5
Less: Imputed Interest	-0.4
Present Value of Minimum Capital Lease Payments	4.1
Operating Leases, Future Minimum Payments Due, 2013	16.5
Operating Leases, Future Minimum Payments Due, 2014	14.1
Operating Leases, Future Minimum Payments Due, 2015	12.9
Operating Leases, Future Minimum Payments Due, 2016	9
Operating Leases, Future Minimum Payments Due, 2017	7.7
Operating Leases, Future Minimum Payments Due, 2018 and Thereafter	19.1
Operating Leases, Total Future Payments	79.3
Total of minimum rentals to be received in the future under non-cancelable subleases	$5.90
Office Space [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	1 year
Office Space [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	10 years
Equipment [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	1 year
Equipment [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	5 years

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Capitalization, Equity [Line Items]
Preferred Stock, shares authorized	20,000,000
Par value of preferred stock (per share)	$0.10
Common stock, shares authorized	100,000,000	100,000,000
Par value of common stock (per share)	$0.10	$0.10
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares outstanding	52,418,246	55,653,437
Stock Repurchased and retired during period, Shares	-3,200,000	-3,000,000	-2,000,000
Repurchases of common stock	($115,500,000)	($100,400,000)	($60,700,000)
Company Action Level RBC, as Percentage of Authorized Control Level RBC	200.00%
Dividends paid	51,800,000	54,900,000	56,900,000
Amount available for dividend payment	268,000,000
Kemper's Insurance Subsidiaries [Member]
Schedule of Capitalization, Equity [Line Items]
Cash dividends paid by Kemper's Insurance Subsidiaries to Kemper	217,500,000
Amount available for dividend payments	218,000,000
Amount of restricted net assets for consolidated and unconsolidated subsidiaries	2,400,000,000
Life and Health [Member]
Schedule of Capitalization, Equity [Line Items]
Statutory capital and surplus for the Company’s life and health insurance subsidiaries	437,300,000	430,200,000
Statutory net income for the Company’s life and health insurance subsidiaries	100,700,000	81,500,000	102,000,000
Statutory capital and surplus required	125,400,000
Property and Casualty Insurance [Member]
Schedule of Capitalization, Equity [Line Items]
Statutory capital and surplus for the Company’s life and health insurance subsidiaries	947,500,000	989,700,000
Statutory net income for the Company’s life and health insurance subsidiaries	85,700,000	138,800,000	40,600,000
Statutory capital and surplus required	$288,700,000
Restricted Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Common stock, shares outstanding	163,720	278,427

Longterm_Equitybased_Compensat2

Long-term Equity-based Compensation (Details) (USD $)	0 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	2-May-13	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized		10,000,000
Shares available for grant		8,243,636
Share-based compensation expense		$6.40	$5.50	$5.80
Total compensation cost not yet recognized		$4.40
Total compensation cost not yet recognized, period for recognition		1 year 9 months 18 days
Initial grant for non-employee director, shares		4,000
Automatic annual grant, non-employee directors, options		4,000
Annual awards of deferred stock units to be issued to each non-employee director	500
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 (shares)		517,500
Options Granted Prior to May 1, 2013 [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Automatic annual grant, non-employee directors, options, vesting period		1 year
Automatic annual grant, non-employee directors, options, expiration date		10 years

Longterm_Equitybased_Compensat3

Long-term Equity-based Compensation - Black-Scholes Pricing Model For Options (Details) (Stock Options [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Volatility Rate, Minimum	25.76%	39.10%	29.36%
Expected Volatility Rate, Maximum	44.43%	48.23%	53.84%
Risk Free Interest Rate, Minimum	1.07%	0.62%	0.16%
Risk Free Interest Rate, Maximum	2.14%	1.38%	1.26%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Dividend Yield Rate	2.53%	2.83%	2.92%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Dividend Yield Rate	2.60%	3.00%	3.26%
Employee [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Term	4 years	4 years	1 year
Employee [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Term	7 years	7 years	7 years
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Term	6 years	6 years	6 years

Longterm_Equitybased_Compensat4

Long-term Equity-based Compensation - Option and SAR Activity (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares Subject to Options at Beginning of Year	2,543,673
Weighted Average Exercise Price Per Share at Beginning of Year	$41.37
Grants in Period	289,000
Grants in Period, Weighted Average Exercise Price	$36.59
Exercises in Period	-46,125
Exercises in Period, Weighted Average Exercise Price	$29.04
Forfeitures and Expirations in Period	-520,837
Forfeitures and Expirations in Period, Weighted Average Exercise Price	$46.94
Shares Subject to Options at End of Year	2,265,711	2,543,673
Weighted Average Exercise Price Per Share at End of Year	$39.74	$41.37
Outstanding at End of Year, Weighted Average Remaining Contractual Term	3 years 9 months 18 days
Outstanding at End of Year, Intrinsic Value	$4.30
Vested and Expected to Vest, Outstanding at End of Year	2,242,297
Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$39.80
Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	3 years 9 months 18 days
Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	4.2
Vested and Expected to Vest, Exercisable at End of Year	1,944,207
Vested and Expected to Vest, Exercisable at End of Year, Weighted Average Exercise Price	$40.59
Vested and Expected to Vest, Exercisable at End of Year, Weighted Average Remaining Contractual Term	3 years
Vested and Expected to Vest, Exercisable at End of Year, Aggregate Intrinsic Value	3.7
Weighted-average grant-date fair values (per share)	$10.49	$10.20	$9.40
Total intrinsic value	0.4	4.1	3
Cash received from exercises of Tandem Awards	0.5	1.7	1.3
Tax benefit realized for tax deductions from exercises of Tandem Awards	$0.10	$1.40	$1

Longterm_Equitybased_Compensat5

Long-term Equity-based Compensation - Schedule of Outstanding Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Subject to Awards	2,265,711	2,543,673
Weighted- average Exercise Price Per Share ($)	$39.74	$41.37
Weighted- average Remaining Contractual Life (in Years)	3 years 9 months 18 days
Range of Exercise Prices $10.00 - $15.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$10
Range of Exercise Prices, Upper Range Limit	$15
Shares Subject to Awards	15,000
Weighted- average Exercise Price Per Share ($)	$13.55
Weighted- average Remaining Contractual Life (in Years)	2 years 3 months 2 days
Shares Subject to Awards	15,000
Weighted- average Exercise Price Per Share ($)	$13.55
Range of Exercise Prices $15.01 - $20.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$15.01
Range of Exercise Prices, Upper Range Limit	$20
Shares Subject to Awards	8,000
Weighted- average Exercise Price Per Share ($)	$16.48
Weighted- average Remaining Contractual Life (in Years)	4 years 4 months 5 days
Shares Subject to Awards	8,000
Weighted- average Exercise Price Per Share ($)	$16.48
Range of Exercise Prices $20.01 - $25.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$20.01
Range of Exercise Prices, Upper Range Limit	$25
Shares Subject to Awards	29,000
Weighted- average Exercise Price Per Share ($)	$23.36
Weighted- average Remaining Contractual Life (in Years)	3 years 10 months 8 days
Shares Subject to Awards	29,000
Weighted- average Exercise Price Per Share ($)	$23.36
Range of Exercise Prices $25.01 - $30.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$25.01
Range of Exercise Prices, Upper Range Limit	$30
Shares Subject to Awards	379,000
Weighted- average Exercise Price Per Share ($)	$28.84
Weighted- average Remaining Contractual Life (in Years)	6 years 2 months 2 days
Shares Subject to Awards	332,998
Weighted- average Exercise Price Per Share ($)	$28.74
Range of Exercise Prices $30.01 - $35.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$30.01
Range of Exercise Prices, Upper Range Limit	$35
Shares Subject to Awards	226,250
Weighted- average Exercise Price Per Share ($)	$33.16
Weighted- average Remaining Contractual Life (in Years)	8 years 1 month 14 days
Shares Subject to Awards	130,500
Weighted- average Exercise Price Per Share ($)	$32.94
Range of Exercise Prices $35.01 - $40.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$35.01
Range of Exercise Prices, Upper Range Limit	$40
Shares Subject to Awards	573,250
Weighted- average Exercise Price Per Share ($)	$36.91
Weighted- average Remaining Contractual Life (in Years)	5 years 10 months 10 days
Shares Subject to Awards	393,498
Weighted- average Exercise Price Per Share ($)	$37.11
Range of Exercise Prices $40.01 - $45.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$40.01
Range of Exercise Prices, Upper Range Limit	$45
Shares Subject to Awards	184,902
Weighted- average Exercise Price Per Share ($)	$43.10
Weighted- average Remaining Contractual Life (in Years)	0 years 1 month 2 days
Shares Subject to Awards	184,902
Weighted- average Exercise Price Per Share ($)	$43.10
Range of Exercise Prices $45.01 - $50.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$45.01
Range of Exercise Prices, Upper Range Limit	$50
Shares Subject to Awards	793,541
Weighted- average Exercise Price Per Share ($)	$48.59
Weighted- average Remaining Contractual Life (in Years)	1 year 1 month 23 days
Shares Subject to Awards	793,541
Weighted- average Exercise Price Per Share ($)	$48.59
Range of Exercise Prices $50.01 - $55.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$50.01
Range of Exercise Prices, Upper Range Limit	$55
Shares Subject to Awards	56,768
Weighted- average Exercise Price Per Share ($)	$51.16
Weighted- average Remaining Contractual Life (in Years)	0 years 1 month 5 days
Shares Subject to Awards	56,768
Weighted- average Exercise Price Per Share ($)	$51.16
Range of Exercise Prices $10.00 - $55.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Range Limit	$10
Range of Exercise Prices, Upper Range Limit	$55
Shares Subject to Awards	2,265,711
Weighted- average Exercise Price Per Share ($)	$39.74
Weighted- average Remaining Contractual Life (in Years)	3 years 9 months 25 days
Shares Subject to Awards	1,944,207
Weighted- average Exercise Price Per Share ($)	$40.59

Longterm_Equitybased_Compensat6

Long-term Equity-based Compensation - Activity Related to Nonvested Restricted Stock (Details) (USD $)	12 Months Ended			0 Months Ended	36 Months Ended	0 Months Ended	36 Months Ended	0 Months Ended	36 Months Ended	0 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 01, 2014	Dec. 31, 2013	Feb. 02, 2013	Dec. 31, 2012	Feb. 03, 2012	Dec. 31, 2011	Jan. 31, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in Period, Total Fair Value	$3.60	$4.10	$4
Income tax benefit from share-based compensation	$1.20	$1.40	$1.40
Time Vested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Balance at Beginning of Year, Restricted Shares	101,627
Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value (per share)	$31.48
Grants in Period	2,000
Grants in Period, Weighted Average Grant Date Fair Value (per share)	$38.59
Vested in Period	-25,568
Vested in Period, Weighted Average Grant Date Fair Value (per share)	$30.56
Forfeited in Period	-24,964
Forfeited in Period, Weighted Average Grant Date Fair Value (per share)	$30.96
Nonvested Balance at End of Year, Restricted Shares	53,095
Nonvested at End of Year, Weighted Average Grant Date Fair Value (per share)	$32.42
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Nonvested Balance at Beginning of Year, Restricted Shares	176,800
Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value (per share)	$39.54
Grants in Period	0
Grants in Period, Weighted Average Grant Date Fair Value (per share)	$0
Vested in Period	-54,934
Vested in Period, Weighted Average Grant Date Fair Value (per share)	$39.83
Forfeited in Period	-11,241
Forfeited in Period, Weighted Average Grant Date Fair Value (per share)	$40.75
Nonvested Balance at End of Year, Restricted Shares	110,625
Nonvested at End of Year, Weighted Average Grant Date Fair Value (per share)	$39.28
Reduction in share authorization if maximum performance level is met or exceeded (shares)	517,500
Time Vested Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Balance at Beginning of Year, Restricted Shares	0
Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value (per share)	$0
Grants in Period	41,925
Grants in Period, Weighted Average Grant Date Fair Value (per share)	$36.56
Vested in Period	-9,351
Vested in Period, Weighted Average Grant Date Fair Value (per share)	$36.47
Forfeited in Period	-2,550
Forfeited in Period, Weighted Average Grant Date Fair Value (per share)	$36.47
Nonvested Balance at End of Year, Restricted Shares	30,024
Nonvested at End of Year, Weighted Average Grant Date Fair Value (per share)	$36.60
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Balance at Beginning of Year, Restricted Shares	0
Nonvested at Beginning of Year, Weighted Average Grant Date Fair Value (per share)	$0
Grants in Period	66,575
Grants in Period, Weighted Average Grant Date Fair Value (per share)	$40.50
Vested in Period	0
Vested in Period, Weighted Average Grant Date Fair Value (per share)	$0
Forfeited in Period	-4,700
Forfeited in Period, Weighted Average Grant Date Fair Value (per share)	$40.50
Nonvested Balance at End of Year, Restricted Shares	61,875
Nonvested at End of Year, Weighted Average Grant Date Fair Value (per share)	$40.50
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 performance level is met or exceeded	61,875
Reduction in share authorization if maximum performance level is met or exceeded (shares)	185,625
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 performance level is met or exceeded		52,850			52,850
Reduction in share authorization if maximum performance level is met or exceeded (shares)		158,550			158,550
Performance Period, 2011 to 2013 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage for exceeding performance target					118.00%
Shares issued during the period				9,014
Performance Period, 2010 to 2012 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage for exceeding performance target							114.00%
Shares issued during the period						6,996
Performance Period, 2009 to 2011 [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage for exceeding performance target									183.00%
Shares issued during the period								40,727
Subsequent Event [Member] | 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 -Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan [Abstract]
Total fair value of DSUs that vested during the years	$0.20	$0.10
Deferred Stock Units, Outstanding, Number, Period Start	4,000
Deferred Stock Units, Outstanding, Weighted Average Exercise Price, Period Start (per share)	$31.50
Deferred Stock Units, Granted and Vested in Period	4,000
Deferred Stock Units, Granted and Vested in Period, Weighted Average Exercise Price (per share)	$37.53
Deferred Stock Units, Outstanding, Number, Period End	8,000	4,000
Deferred Stock Units, Outstanding, Weighted Average Exercise Price, Period End (per share)	$34.52	$31.50

Income_From_Continuing_Operati2

Income From Continuing Operations Per Unrestricted Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations	$63.30	$4.80	$9.30	$35.20	$54.80	$68.60	$32.50	$58.60	$112.60	$214.50	$91.80
Dilutive Effect on Income of Equity-based Compensation Equivalent Shares									0	0	0
Diluted Income from Continuing Operations Attributed to Unrestricted Shares									112.1	213.4	91.3
Weighted-Average Unrestricted Shares Outstanding									53,762,500	56,856,900	58,857,300
Equity-based Compensation Equivalent Shares									105,400	126,700	141,700
Weighted-average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution									53,867,900	56,983,600	58,999,000
Basic Income from Continuing Operations Per Unrestricted Share (per share)	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.75	$1.55
Diluted Income from Continuing Operations Per Unrestricted Share (per share)	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.74	$1.54
Common Stock [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations									112.1	213.4	91.3
Participating Awards [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income from Continuing Operations									$0.50	$1.10	$0.50

Income_From_Continuing_Operati3

Income From Continuing Operations Per Unrestricted Share - Antidilutive Securities (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Options Excluded from Computation of Earnings Per Share, Amount	1,605,100	2,080,900	2,756,100
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Options Excluded from Computation of Earnings Per Share, Amount	1,605,100	2,080,900	2,756,100

Other_Comprehensive_Income_And2

Other Comprehensive Income And Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive Income (Loss) Before Income Taxes:
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment	$259.70	($324.90)	$157.90
Reclassification Adjustment for Amounts Included in Net Income	-25.1	-37.9	-61.2
Unrealized Holding Gains (Losses)	234.6	-362.8	96.7
Foreign Currency Translation Adjustments Arising During the Period Before Reclassification Adjustment	-1	0.2	1.6
Reclassification Adjustment for Amounts Included in Net Income	0	0	0
Foreign Currency Translation Adjustments	-1	0.2	1.6
Unrecognized Postretirement Benefit Costs Arising During the Year	-106.4	61.6	-29.4
Amortization of Net Unrecognized Postretirement Benefit Costs	7.9	25	16.2
Net Unrecognized Postretirement Benefit Costs	-98.5	86.6	-13.2
Other Comprehensive Income (Loss) Before Income Taxes	135.1	-276	85.1
Income Tax Benefit (Expense):
Unrealized Holding Gains and Losses Arising During the Year Before Reclassification Adjustment	-91.6	115.9	-55.9
Reclassification Adjustment for Amounts Included in Net Income	8.8	13.2	21.5
Unrealized Holding Gains and Losses	-82.8	129.1	-34.4
Foreign Currency Translation Adjustments Arising During the Period Before Reclassification Adjustment	0.4	-0.1	-0.6
Reclassification Adjustment for Amounts Included in Net Income	0	0	0
Foreign Currency Translation Adjustment	0.4	-0.1	-0.6
Unrecognized Postretirement Benefit Costs Arising During the Year	37.5	-21.6	10.3
Amortization of Unrecognized Postretirement Benefit Costs	-2.8	-8.8	-5.7
Net Unrecognized Postretirement Benefit Costs	34.7	-30.4	4.6
Other Comprehensive Income Tax Benefit (Expense)	($47.70)	$98.60	($30.40)

Accumulated_Other_Comprehensiv

- Accumulated Other Comprehensive Income (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Unrealized Gains on Investments, Net of Income Taxes:
Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings	$2.80	$0.30
Other Net Unrealized Gains on Investments	324.8	175.5
Foreign Currency Translation Adjustments, Net of Income Taxes	0.2	0.8
Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes	-105.1	-41.3
Accumulated Other Comprehensive Income	$222.70	$135.30

Other_Comprehensive_Income_And3

Other Comprehensive Income And Accumulated Other Comprehensive Income Reclassification from AOCI to Consolidated Statements of Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Realized Gains (Losses) on Sales of Investments	$21	$8	$3.50	$6.60	$20.80	$49.10	$2.30	$26.90	$39.10	$99.10	$65.40
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Income Tax Benefit (Expense)	-29.8	0.8	-1.9	-16.7	-26.6	-33.4	-13.9	-26	-47.6	-99.9	-30.6
Net Income	65.4	4.7	9.3	35.1	55.2	70.1	34	58.4	114.5	217.7	103.4
Interest and Other Expenses	-24.4	-22.1	-22.5	-22.7	-26.2	-25.3	-25.2	-23.8	-91.7	-100.5	-85.5
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Income									11.2	8.5	29.2
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Realized Gains (Losses) on Sales of Investments									37.9	51.8	65
Net Impairment Losses Recognized in Earnings									-12.8	-13.9	-3.8
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									25.1	37.9	61.2
Income Tax Benefit (Expense)									-8.8	-13.2	-21.5
Net Income									16.3	24.7	39.7
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Benefit (Expense)									2.8	8.8	5.7
Net Income									-5.1	-16.2	-10.5
Interest and Other Expenses									($7.90)	($25)	($16.20)

Income_From_Investments_Net_In

Income From Investments - Net Investment Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investment Income:
Equity Method Limited Liability Investments									$9	$26.40	$9.30
Fair Value Option Investments									-0.7	0	0
Short-term Investments									0.6	0.1	0.2
Real Estate									12.1	20.8	27.4
Loans to Policyholders									20.5	19.8	18.9
Other									0.1	0	0.1
Total Investment Income									328.9	340.6	327.7
Investment Expenses:
Other Investment Expenses									19.8	25.9	31.8
Net Investment Income	93.1	72.3	72.6	71.1	76.9	82.4	74.6	80.8	309.1	314.7	295.9
Accrued Investment Income Receivable	65.5				66.7				65.5	66.7
Real Estate Investment [Member]
Investment Expenses:
Other Investment Expenses									11.3	18.3	26.1
Other Investment [Member]
Investment Expenses:
Other Investment Expenses									8.5	7.6	5.7
Fixed Maturities [Member]
Investment Income:
Interest and Dividends on Fixed Maturities									227.4	235.5	246.1
Equity Securities [Member]
Investment Income:
Dividends on Equity Securities									$59.90	$38	$25.70

Income_From_Investments_Net_Re

Income From Investments - Net Realized Gains on Sales of Investments (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Investment Income [Line Items]
Realized Investment Gains									$41.70	$99.50	$65.40
Realized Investment Losses									-2.5	-1	-0.3
Gain on Sale of Subsidiary									1.6	0	0
Trading Securities, Realized Gain (Loss)									-0.1	0.6	0.3
Net Realized Gains (Losses) on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Fixed Maturities [Member]
Net Investment Income [Line Items]
Gains on Sales									7	30.9	56.9
Losses on Sales									-0.2	-0.4	-0.1
Equity Securities [Member]
Net Investment Income [Line Items]
Gains on Sales									33.1	21.8	8.3
Losses on Sales									-2	-0.5	-0.2
Investee [Member]
Net Investment Income [Line Items]
Equity Method Limited Liability Investment, Gains on Sales									0	2.5	0
Real Estate Investment [Member]
Net Investment Income [Line Items]
Realized Investment Gains									0	44.2	0.2
Realized Investment Losses									-0.2	0	0
Other Investment [Member]
Net Investment Income [Line Items]
Realized Investment Gains									0	0.1	0
Realized Investment Losses									($0.10)	($0.10)	$0

Income_From_Investments_Net_Im

Income From Investments - Net Impairment Losses Recognized in Earnings (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Investment Income [Line Items]
Net Impairment Losses Recognized in Earnings	($6.50)	($3.80)	($4.10)	($0.80)	($7.60)	($3.40)	($1)	($1.90)	($15.20)	($13.90)	($6.90)
Fixed Maturities [Member]
Net Investment Income [Line Items]
Net Impairment Losses Recognized in Earnings									-5.7	-10.3	-1.9
Equity Securities [Member]
Net Investment Income [Line Items]
Net Impairment Losses Recognized in Earnings									-7.1	-3.6	-1.9
Real Estate [Member]
Net Investment Income [Line Items]
Net Impairment Losses Recognized in Earnings									($2.40)	$0	($3.10)

Insurance_Expenses_Details

Insurance Expenses (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Insurance Expenses [Abstract]
Commissions									$324.60	$345.70	$366.10
General Expenses									258.1	257.1	262.9
Taxes, Licenses and Fees									38.9	42.8	44.7
Total Costs Incurred									621.6	645.6	673.7
Policy Acquisition Costs:
Deferred									-235.8	-253.4	-266.4
Amortized									235.4	253.9	257
Net Policy Acquisition Costs Amortized (Deferred)									-0.4	0.5	-9.4
Life VIF and P&C Customer Relationships Amortized									7.2	8.3	8
Insurance Expenses	$156.40	$158.60	$161.30	$152.10	$162.90	$170.10	$163.10	$158.30	$628.40	$654.40	$672.30

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income taxes paid	$37.20	$42.40	$52.20
Interest on income taxes expense	0.4	0.4	0.4
Mutual Savings Life [Member]
Mutual Savings Life’s income	14.7
Amount of tax the company will have to pay if the Mutual Savings Life's income is distributes to shareholders in the future	$5.10

Income_Taxes_Schedule_of_Liabi

Income Taxes - Schedule of Liabilities for Income Tax (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]
Accrued Income Taxes, Current	$7.80	$1.50
Deferred Income Tax Liabilities	21.5	0
Unrecognized Tax Benefits	7.2	6.8	6.4	6.2
Liabilities for Income Taxes	$36.50	$8.30

Income_Taxes_Schedule_of_Tempo

Income Taxes - Schedule of Temporary Differences That Give Rise to Net Deferred Income Tax Assets (Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Deferred Income Tax Assets:
Insurance Reserves	$78.70	$76.40
Unearned Premium Reserves	35.5	40.2
Tax Capitalization of Policy Acquisition Costs	73	73.3
Payroll and Employee Benefit Accruals	74	38.8
Net Operating Loss Carryforward	31.7	53.3
Other	9.8	12.6
Total Deferred Income Tax Assets	302.7	294.6
Deferred Income Tax Liabilities:
Investments	160.1	80
Deferred Policy Acquisition Costs	106.1	106
Value of Insurance in Force Acquired	17.7	20.2
Goodwill and Licenses	28.4	26.8
Depreciable Assets	7.4	26
Other	4.5	3.8
Total Deferred Income Tax Liabilities	324.2	262.8
Net Deferred Income Tax Liabilities	($21.50)	$31.80

Income_Taxes_Summary_of_Federa

Income Taxes - Summary of Federal Net Operating Loss Carryforwards and Related Deferred Income Tax Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Contingency [Line Items]
Deferred Tax Asset	$31.70	$53.30
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
NOL Carry-forwards	90.5
Deferred Tax Asset	31.7
Internal Revenue Service (IRS) [Member] | 2020 [Member]
Income Tax Contingency [Line Items]
NOL Carry-forwards	8.1
Deferred Tax Asset	2.8
Internal Revenue Service (IRS) [Member] | 2021 through 2025 [Member]
Income Tax Contingency [Line Items]
NOL Carry-forwards	30.6
Deferred Tax Asset	10.8
Internal Revenue Service (IRS) [Member] | 2026 through 2030 [Member]
Income Tax Contingency [Line Items]
NOL Carry-forwards	29.8
Deferred Tax Asset	10.4
Internal Revenue Service (IRS) [Member] | 2031 through 2032 [Member]
Income Tax Contingency [Line Items]
NOL Carry-forwards	22
Deferred Tax Asset	$7.70

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	$0.10	$0.10	$0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at Beginning of Year	6.8	6.4	6.2
Additions for Tax Positions of Prior Years	0.3	0.3	0.2
Balance at End of Year	7.2	6.8	6.4
Possible decrease in unrecognized tax benefit	3.5
Unrecognized tax benefit	3.4	3.4	3.5
Accrued interest included in unrecognized tax benefits	3.8	3.4	2.9
Interest on income taxes expense	($0.40)	($0.40)	($0.40)

Income_Taxes_Income_Tax_Benefi

Income Taxes - Income Tax Benefit (Expense) from Continuing Operations (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current Income Tax Expense									($41.70)	($49.40)	($43.30)
Deferred Income Tax Benefit (Expense)									-5.5	-50.1	12.9
Increase Unrecognized Tax Benefits									-0.4	-0.4	-0.2
Income Tax Expense	($29.80)	$0.80	($1.90)	($16.70)	($26.60)	($33.40)	($13.90)	($26)	($47.60)	($99.90)	($30.60)

Income_Taxes_Statutory_Federal

Income Taxes - Statutory Federal Income Tax Expense, Effective Income Tax Expense, Rates (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory Federal Income Tax Expense									($56.10)	($110)	($42.80)
Statutory Federal Income Tax Expense, Rate, percentage									35.00%	35.00%	35.00%
Tax-exempt Income and Dividends Received Deduction									9	10.6	13.9
Tax-exempt Income and Dividends Received Deduction, Rate, percentage									-5.60%	-3.40%	-11.40%
State Income Taxes									-0.6	-0.2	-0.8
State Income Taxes, Rate, percentage									0.40%	0.10%	0.70%
Other, Net									0.1	-0.3	-0.9
Other, Net, Rate, percentage									-0.10%	0.10%	0.70%
Income Tax Expense	($29.80)	$0.80	($1.90)	($16.70)	($26.60)	($33.40)	($13.90)	($26)	($47.60)	($99.90)	($30.60)
Effective Income Tax Expense, Rate, percentage									29.70%	31.80%	25.00%

Income_Taxes_Comprehensive_Inc

Income Taxes - Comprehensive Income Tax Benefit and Expense (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Benefit (Expense) [Abstract]
Income Tax Expense	($29.80)	$0.80	($1.90)	($16.70)	($26.60)	($33.40)	($13.90)	($26)	($47.60)	($99.90)	($30.60)
Income Tax Expense - Discontinued Operations									-1.1	-1.7	-7.3
Unrealized Appreciation on Securities									-82.8	129.1	-34.4
Foreign Currency Translation Adjustments on Investments									0.4	-0.1	-0.6
Tax Effects from Postretirement Benefit Plans									34.7	-30.4	4.6
Tax Effects from Long-Term Equity-based Compensation included in Pain-in Capital									-1	0.2	-0.1
Comprehensive Income Tax Expense									$97.40	$2.80	$68.40

Pension_Benefits_Details

Pension Benefits (Details) (USD $)	0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 04, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Actuarial Gain Recognized in Other Comprehensive Income, Before Tax		($106.40)	$61.60	($29.40)
Defined Contribution Plan, Cost Recognized		7.3	7.3	7.8
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Number of Participants and Beneficiaries		9,500
Defined Benefit Pension Plans Active Employees		2,200
Percentage of Compensation, Defined Benefit Plan Employee Contribution		3.00%
Defined Benefit Plan, Contributions by Employer		0	55
Defined Benefit Plan, Funded Status of Plan		-91	9
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	55
Pension Expense Recognized		8.3	29.7	22.5
Actuarial Gain Recognized in Other Comprehensive Income, Before Tax		-102	53.8	-34.8
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded Status of Plan		31	23.3
Pension Expense Recognized		1.8	1.8	1.8
Actuarial Gain Recognized in Other Comprehensive Income, Before Tax		($7)	($1.50)	($1.30)

Pension_Benefits_Changes_in_Fa

Pension Benefits - Changes in Fair Value of Plan Assets and Changes in Accumulated Benefit Obligations (Details) (Pension Plans, Defined Benefit [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	$524.50	$457.60
Actual Return on Plan Assets	41.7	34.5
Employer Contributions	0	55
Benefits Paid	-23.2	-22.6
Fair Value of Plan Assets at End of Year	543	524.5
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligations at Beginning of Year	515.5	553.9
Service Cost	8.7	10.8
Interest Cost	24.8	22.4
Benefits Paid	-23.2	-22.6
Plan Amendments	-0.6	0
Actuarial Losses (Gains)	-108.8	49
Projected Benefit Obligation at End of Year	634	515.5
Funded Status—Plan Assets in Excess (Deficit) of Projected Benefit Obligation	-91	9
Amount Recognized in Accumulated Other Comprehensive Income:
Accumulated Actuarial Loss	-178.6	-86.3
Prior Service Credit	0.5	0
Unamortized Amount Reported in AOCI at End of Year	-178.1	-86.3
Accumulated Benefit Obligation at End of Year	$608.20	$496.20

Pension_Benefits_Actuarial_Ass

Pension Benefits - Actuarial Assumptions for Project Benefit Obligations (Details) (Pension Plans, Defined Benefit [Member])	Dec. 31, 2014	Dec. 31, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount Rate	4.10%	4.90%
Rate of Increase in Future Compensation Levels	3.31%	3.05%

Pension_Benefits_Weighted_Aver

Pension Benefits - Weighted Average Asset Allocation for Pension Plans (Details) (Pension Plans, Defined Benefit [Member])	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	100.00%	100.00%
Cash and Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	4.00%	8.00%
Corporate Bonds and Notes [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	29.00%	27.00%
Common and Preferred Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	43.00%	34.00%
Exchange Traded Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	12.00%	22.00%
Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	12.00%	9.00%

Pension_Benefits_Fair_Value_Pl

Pension Benefits - Fair Value Plan Assets Measurements (Details) (Pension Plans, Defined Benefit [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$543	$524.50
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	284.5	333.4
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	193.6	143.7
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	64.9	47.4	27.5
US Government and Government Agencies and Authorities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	18.4	12.1
US Government and Government Agencies and Authorities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	18.4	12.1
US Government and Government Agencies and Authorities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
US Government and Government Agencies and Authorities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
States and Political Subdivisions [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.3	3.1
States and Political Subdivisions [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
States and Political Subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.3	3.1
States and Political Subdivisions [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Corporate Bonds and Notes [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	136.6	127
Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	136.6	127
Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Preferred Stocks Finance, Insurance and Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.4	4
Preferred Stocks Finance, Insurance and Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Preferred Stocks Finance, Insurance and Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.4	4
Preferred Stocks Finance, Insurance and Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Common Stocks Manufacturing [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	113.8	105.3
Common Stocks Manufacturing [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	98.8	97.5
Common Stocks Manufacturing [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15	7.8
Common Stocks Manufacturing [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Common Stock Other Industries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	81.6	69
Common Stock Other Industries [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	79.3	67.2
Common Stock Other Industries [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2.3	1.8
Common Stock Other Industries [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	30
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	30
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0
Exchange Traded Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	65.5	111.7
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	65.5	111.7
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Limited Liability Companies and Limited Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	64.5	46.9
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	64.5	46.9
Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	21.5	42.6
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	21.5	42.6
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Receivables and Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1.4	2.8
Receivables and Other [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	2.3
Receivables and Other [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Receivables and Other [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$0.40	$0.50	$0.60

Pension_Benefits_Changes_in_Fa1

Pension Benefits - Changes in Fair Value of Pension Plans Level 3 (Details) (Pension Plans, Defined Benefit [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at End of Year	$543	$524.50
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	47.4	27.5
Return on Plan Assets Held	3.4	3.5
Purchases, Sales and Settlements, Net	14.1	16.4
Fair Value of Plan Assets at End of Year	64.9	47.4
Other Equity Interests [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	46.9	26.9
Return on Plan Assets Held	3.4	3.5
Purchases, Sales and Settlements, Net	14.2	16.5
Fair Value of Plan Assets at End of Year	64.5	46.9
Receivables and Other [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at End of Year	1.4	2.8
Receivables and Other [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	0.5	0.6
Return on Plan Assets Held	0	0
Purchases, Sales and Settlements, Net	-0.1	-0.1
Fair Value of Plan Assets at End of Year	$0.40	$0.50

Pension_Benefits_Components_Of

Pension Benefits - Components Of Comprehensive Pension Expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Unrecognized Pension Loss (Gain) Arising During the Year	$106.40	($61.60)	$29.40
Amortization of Accumulated Unrecognized Pension Loss	-7.9	-25	-16.2
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost Earned During the Year	8.7	10.8	10.8
Interest Cost on Projected Benefit Obligation	24.8	22.4	22.4
Expected Return on Plan Assets	-34.9	-29.7	-29.8
Amortization of Actuarial Loss	9.7	26.2	18.8
Settlements	0	0	0.3
Pension Expense Recognized in Consolidated Statements of Income	8.3	29.7	22.5
Unrecognized Pension Loss (Gain) Arising During the Year	102	-53.8	34.8
Prior Service Credit Arising During the Year	-0.6	0	0
Amortization of Accumulated Unrecognized Pension Loss	-9.7	-26.2	-18.8
Comprehensive Pension Expense (Income)	100	-50.3	38.5
Amounts that will be amortized from AOCI in next Fiscal Year	23
Discontinued Operations [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense Recognized in Consolidated Statements of Income			$0.50

Pension_Benefits_Actuarial_Ass1

Pension Benefits - Actuarial Assumptions Pension Expense (Details) (Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.90%	4.05%	4.60%
Rate of Increase in Future Compensation Levels	3.05%	3.08%	3.27%
Expected Long Term Rate of Return on Plan Assets	7.00%	7.00%	7.00%

Pension_Benefits_Pension_Benef

Pension Benefits - Pension Benefit Payments (Details) (Pension Plans, Defined Benefit [Member], USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Future Benefit Payments In 2015	$25.20
Expected Future Benefit Payments in 2016	26.5
Expected Future Benefit Payments in 2017	27.8
Expected Future Benefit Payments in 2018	29.2
Expected Future Benefit Payments in 2019	30.4
Expected Future Benefit Payments in 2020-2024	$169.60

Postretirement_Benefits_Other_2

Postretirement Benefits Other Than Pensions (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	employees
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retired employees covered	500
Number of active employees covered	300
Effect of one percentage point increase on accumulated postretirement benefit obligation	$1.70	$2.10
Effect of one percentage point increase on service and interest cost components	0.1	0.1
Amounts that will be amortized from AOCI in next Fiscal Year	-1.5
Estimated future employer contributions in next fiscal year	$3.20
Medical Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	8.00%	8.50%
Health care cost trend rate assumed for future years	5.00%	5.00%
Prescription Drug Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	7.50%	8.00%
Health care cost trend rate assumed for future years	5.00%	5.00%

Postretirement_Benefits_Other_3

Postretirement Benefits Other Than Pensions - Changes in Fair Value of Plan Assets and Changes in Accumulated Benefit Obligations (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	$0	$0
Employer Contributions	3.4	2.9
Plan Participants' Contributions	1.2	1.2
Benefits Paid	-4.6	-4.1
Fair Value of Plan Assets at End of Year	0	0	0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligations at Beginning of Year	35.1	42.8
Service Cost	0.2	0.2	0.2
Interest Cost	1.1	1.2	1.6
Plan Participants' Contributions	1.2	1.2
Benefits Paid	-4.6	-4.1
Medicare Part D Subsidy Received	0.1	0
Actuarial Losses (Gains)	-2	-6.2
Projected Benefit Obligation at End of Year	31.1	35.1	42.8
Funded Status—Plan Assets in Excess (Deficit) of Projected Benefit Obligation	-31.1	-35.1
Unamortized Actuarial Gain Reported in AOCI at End of Year	($18.60)	($18.40)

Postretirement_Benefits_Other_4

Postretirement Benefits Other Than Pensions - Actuarial Assumptions of OPEB Accumulated Benefit Obligation (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member])	Dec. 31, 2014	Dec. 31, 2013
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	3.40%	4.00%
Rate of Increase in Future Compensation Levels	2.68%	2.10%

Postretirement_Benefits_Other_5

Postretirement Benefits Other Than Pensions - Components Of Comprehensive OPEB (Income) Expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Unrecognized Postretirement Benefit Costs Arising During the Year	($106.40)	$61.60	($29.40)
Amortization of Accumulated Unrecognized Pension Loss	-7.9	-25	-16.2
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost Earned During the Year	0.2	0.2	0.2
Interest Cost on Accumulated Postretirement Benefit Obligation	1.1	1.2	1.6
Amortization of Actuarial Loss	-1.8	-1.2	-1.2
Pension Expense Recognized in Consolidated Statements of Income	-0.5	0.2	0.6
Unrecognized Postretirement Benefit Costs Arising During the Year	2	6.2	5.5
Amortization of Accumulated Unrecognized Pension Loss	1.8	1.2	1.2
Comprehensive OPEB Expense	($0.70)	($4.80)	($3.70)

Postretirement_Benefits_Other_6

Postretirement Benefits Other Than Pensions - Actuarial Assumptions of OPEB Expense (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.00%	3.15%	4.25%
Rate of Increase in Future Compensation Levels	2.10%	2.10%	2.10%

Postretirement_Benefits_Other_7

Postretirement Benefits Other Than Pensions - Benefit Payments Net, Modernization Act Subsidy (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member], USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Excluding Medicare Part D Subsidy Year One	$3.60
Expected Medicare Part D Subsidy, Year One	-0.4
Net OPEB Benefits Year One	3.2
Excluding Medicare Part D Subsidy, Year Two	3.7
Expected Medicare Part D Subsidy, Year Two	-0.4
Net OPEB Benefits Year Two	3.3
Excluding Medicare Part D Subsidy, Year Three	3.6
Expected Medicare Part D Subsidy, Year Three	-0.4
Net OPEB Benefits Year Three	3.2
Excluding Medicare Part D Subsidy, Year Four	3.5
Expected Medicare Part D Subsidy, Year Four	-0.4
Net OPEB Benefits Year Four	3.1
Excluding Medicare Part D Subsidy, Year Five	3.4
Expected Medicare Part D Subsidy, Year Five	-0.4
Net OPEB Benefits Year Five	3
Excluding Medicare Part D Subsidy Fiscal Years Thereafter	13.8
Expected Medicare Part D Subsidy, Five Fiscal Years Thereafter	-1.6
Net OPEB Benefits Five Fiscal Years Thereafter	$12.20

Business_Segments_Details

Business Segments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	segments
Segment Reporting [Abstract]
Number of Operating Segments	2
Allocated Interest and Other Expenses	$42.10	$39.70	$31.70

Business_Segments_Segment_Asse

Business Segments - Segment Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Segment Reporting Information [Line Items]
Assets	$7,833.40	$7,656.40
Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Assets	2,486.10	2,648.60
Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Assets	4,810.60	4,545.60
Corporate and Other, Net [Member]
Segment Reporting Information [Line Items]
Assets	$536.70	$462.20

Business_Segments_Earned_Premi

Business Segments - Earned Premiums by Product Line (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Entity-Wide Information, Revenue from External Customer [Line Items]
Premiums Earned, Net, Life									$387.60	$392.70	$393.40
Premiums Earned, Net, Accident and Health									148.6	161.4	165.2
Earned Premiums	451.5	462.8	470.3	477.6	495.6	507.5	512.8	509.9	1,862.20	2,025.80	2,107.10
Personal Automobile [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Premiums Earned, Net, Property and Casualty									831.4	959.1	1,050.10
Homeowners [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Premiums Earned, Net, Property and Casualty									312.4	326.2	318
Other Personal Lines [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Premiums Earned, Net, Property and Casualty									127.4	134.1	136.9
Commercial Automobile [Member]
Entity-Wide Information, Revenue from External Customer [Line Items]
Premiums Earned, Net, Property and Casualty									$54.80	$52.30	$43.50

Business_Segments_Segment_Reve

Business Segments - Segment Revenues (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Earned Premiums	$451.50	$462.80	$470.30	$477.60	$495.60	$507.50	$512.80	$509.90	$1,862.20	$2,025.80	$2,107.10
Net Investment Income	93.1	72.3	72.6	71.1	76.9	82.4	74.6	80.8	309.1	314.7	295.9
Other Income	0.6	0.5	0.2	0.1	0.3	0.1	0.2	0.2	1.4	0.8	0.8
Total Revenues	559.7	539.8	542.5	554.6	586	635.7	588.9	615.9	2,196.60	2,426.50	2,462.30
Net Realized Gains on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues									2,155	2,327.30	2,390.10
Operating Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Earned Premiums									1,249.50	1,392.90	1,467.20
Net Investment Income									72.7	90.9	77.9
Other Income									0.5	0.5	0.7
Total Revenues									1,322.70	1,484.30	1,545.80
Operating Segments [Member] | Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Earned Premiums									612.7	632.9	639.9
Net Investment Income									218.7	209.9	204.3
Other Income									0.9	0.2	0.1
Total Revenues									832.3	843	844.3
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Other Income									17.7	14	13.7
Net Realized Gains on Sales of Investments									39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings									($15.20)	($13.90)	($6.90)

Business_Segments_Segment_Oper

Business Segments - Segment Operating Profit (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating Income (Loss)									$136.30	$229.20	$63.90
Net Realized Gains on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Income from Continuing Operations before Income Taxes	93.1	4	11.2	51.9	81.4	102	46.4	84.6	160.2	314.4	122.4
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									169	276.5	104.8
Operating Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									27.1	139.6	-35.6
Operating Segments [Member] | Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									141.9	136.9	140.4
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)									-32.7	-47.3	-40.9
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net Realized Gains on Sales of Investments									39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings									($15.20)	($13.90)	($6.90)

Business_Segments_Segment_Net_

Business Segments - Segment Net Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net Operating Income									$97.10	$159.20	$53.80
Income from Continuing Operations	63.3	4.8	9.3	35.2	54.8	68.6	32.5	58.6	112.6	214.5	91.8
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Operating Income									116.7	189.9	79.9
Operating Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Net Operating Income									24.9	100.6	-10.9
Operating Segments [Member] | Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Net Operating Income									91.8	89.3	90.8
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net Operating Income									-19.6	-30.7	-26.1
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net Realized Gains on Sales of Investments									25.4	64.4	42.5
Net Impairment Losses Recognized in Earnings									$9.90	$9.10	$4.50

Business_Segments_Amortization

Business Segments - Amortization of Deferred Policy Acquisitions Costs By Segment (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Amortization of Deferred Policy Acquisition Costs	$235.40	$253.90	$257
Operating Segments [Member]
Segment Reporting Information [Line Items]
Amortization of Deferred Policy Acquisition Costs	235.4	253.9	257
Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Amortization of Deferred Policy Acquisition Costs	187.5	207.2	212.6
Life and Health Insurance [Member]
Segment Reporting Information [Line Items]
Amortization of Deferred Policy Acquisition Costs	$47.90	$46.70	$44.40

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale of Loan Portfolios									$0	$0	$12.90
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Gain on Sale of Loan Portfolios									0	0	12.9
Income from Discontinued Operations before Income Taxes									3	4.9	18.9
Income Tax Expense									-1.1	-1.7	-7.3
Income from Discontinued Operations	2.1	-0.1	0	-0.1	0.4	1.5	1.5	-0.2	1.9	3.2	11.6
Income from Discontinued Operations Per Unrestricted Share:
Basic (in dollars per share)									$0.04	$0.06	$0.20
Diluted (in dollars per share)									$0.04	$0.06	$0.20
Property and Casualty	733.9				843.5				733.9	843.5	970.6	1,029.10
Fireside [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale of Loan Portfolios									0	0	12.9
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Results of Operations									0	0	-0.2
Gain on Sale of Loan Portfolios									0	0	12.9
Unitrin Business Insurance [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Results of Operations									3	4.9	6.2
Income from Discontinued Operations Per Unrestricted Share:
Property and Casualty	69.3				82				69.3	82
Inactive Loan Portfolio [Member] | Fireside [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale of Loan Portfolios											12.9
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Gain on Sale of Loan Portfolios											$12.90

Catastrophe_Reinsurance_Detail

Catastrophe Reinsurance (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Reinsurance Transactions [Abstract]
Catastrophic Events Classification	$25

Catastrophe_Reinsurance_Covera

Catastrophe Reinsurance - Coverage for Catastrophe Reinsurance (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property and Casualty Insurance [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage	0.00%	0.00%	0.00%
Property and Casualty Insurance [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage	95.00%	65.00%	65.00%
Property and Casualty Insurance [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage	95.00%	95.00%	95.00%
Property and Casualty Insurance [Member] | Third Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage	95.00%	90.00%	90.00%
Property and Casualty Insurance [Member] | Fourth Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage		50.00%	50.00%
Property and Casualty Insurance [Member] | Minimum [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Amount Retained	0	0	0
Property and Casualty Insurance [Member] | Minimum [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	50	50	50
Property and Casualty Insurance [Member] | Minimum [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	100	100	100
Property and Casualty Insurance [Member] | Minimum [Member] | Third Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	200	200	200
Property and Casualty Insurance [Member] | Minimum [Member] | Fourth Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured		350	350
Property and Casualty Insurance [Member] | Maximum [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Amount Retained	50	50	50
Property and Casualty Insurance [Member] | Maximum [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	100	100	100
Property and Casualty Insurance [Member] | Maximum [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	200	200	200
Property and Casualty Insurance [Member] | Maximum [Member] | Third Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	400	350	350
Property and Casualty Insurance [Member] | Maximum [Member] | Fourth Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured		450	450
Life and Health Segment - Property Insurance Operations [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage			0.00%
Life and Health Segment - Property Insurance Operations [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage			70.00%
Life and Health Segment - Property Insurance Operations [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Percentage			70.00%
Life and Health Segment - Property Insurance Operations [Member] | Minimum [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Amount Retained			0
Life and Health Segment - Property Insurance Operations [Member] | Minimum [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured			8
Life and Health Segment - Property Insurance Operations [Member] | Minimum [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured			15
Life and Health Segment - Property Insurance Operations [Member] | Maximum [Member] | Retained [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Amount Retained			8
Life and Health Segment - Property Insurance Operations [Member] | Maximum [Member] | First Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured			15
Life and Health Segment - Property Insurance Operations [Member] | Maximum [Member] | Second Layer of Coverage [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured			40

Catastrophe_Reinsurance_Catast

Catastrophe Reinsurance - Catastrophe Reinsurance Premiums (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Liability for Catastrophe Claims [Line Items]
Ceded Catastrphoe Reinsurance Premiums	$26	$33.90	$42.50
Catastrophe Reinsurance [Member]
Liability for Catastrophe Claims [Line Items]
Ceded Catastrphoe Reinsurance Premiums	17.7	23.6	27.1
Property and Casualty Insurance [Member] | Catastrophe Reinsurance [Member]
Liability for Catastrophe Claims [Line Items]
Ceded Catastrphoe Reinsurance Premiums	17.6	23.6	25.1
Life and Health Insurance [Member] | Catastrophe Reinsurance [Member]
Liability for Catastrophe Claims [Line Items]
Ceded Catastrphoe Reinsurance Premiums	$0.10	$0	$2

Catastrophe_Reinsurance_Catast1

Catastrophe Reinsurance - Catastrophe Losses and LAE (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Liability for Catastrophe Claims [Line Items]
Catastrophe Losses and LAE	$908.30	$991.90	$1,221.60
Catastrophe Loss and LAE Reserves, (Unfavorable) Favorable Development	57.1	64.6	31.5
Catastrophe [Member]
Liability for Catastrophe Claims [Line Items]
Catastrophe Losses and LAE	83.8	36.2	118.2
Catastrophe Loss and LAE Reserves, (Unfavorable) Favorable Development	-14.7	-14.5	-6.3
Catastrophe [Member] | Superstorm Sandy [Member]
Liability for Catastrophe Claims [Line Items]
Liability for Catastrophe Claims, Carrying Amount			48.5
Property and Casualty Insurance [Member] | Catastrophe [Member]
Liability for Catastrophe Claims [Line Items]
Catastrophe Losses and LAE	80.7	34.6	112.1
Catastrophe Loss and LAE Reserves, (Unfavorable) Favorable Development	-15.8	-12.5	-6.4
Life and Health Insurance [Member] | Catastrophe [Member]
Liability for Catastrophe Claims [Line Items]
Catastrophe Losses and LAE	3.1	1.6	6.1
Catastrophe Loss and LAE Reserves, (Unfavorable) Favorable Development	$1.10	($2)	$0.10

Other_Reinsurance_Ceded_Insura

Other Reinsurance Ceded Insurance (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effects of Reinsurance [Line Items]
Ceded to Other Companies	$26	$33.90	$42.50
Catastrophe Reinsurance [Member]
Effects of Reinsurance [Line Items]
Ceded to Other Companies	$17.70	$23.60	$27.10

Other_Reinsurance_Assumed_Insu

Other Reinsurance Assumed Insurance (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assumed Insurance [Line Items]
Assumed Premiums Earned	$57.10	$52.70	$44
Capitol [Member]
Assumed Insurance [Line Items]
Number of Company Employee Board Members	5
Number of Board of Director Members	5
ORCC [Member]
Assumed Insurance [Line Items]
Number of Company Employee Board Members	9
Number of Board of Director Members	9
Capitol [Member]
Assumed Insurance [Line Items]
Assumed Premiums Earned	21.9	22.4	25
Capitol [Member] | Trinity [Member]
Assumed Insurance [Line Items]
Earned Premiums Assumed, Percentage	100.00%
ORCC [Member]
Assumed Insurance [Line Items]
Assumed Premiums Earned	6.7	7.2	8.2
ORCC [Member] | Trinity [Member]
Assumed Insurance [Line Items]
Earned Premiums Assumed, Percentage	100.00%
Non-Catastrophe Reinsurance [Member]
Assumed Insurance [Line Items]
Assumed Premiums Earned	$57.10	$52.70	$44

Fair_Value_Measurements_Valuat

Fair Value Measurements - Valuation of Assets Measured at Fair Value (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Option Investments	$53.30	$0
Trading Securities at Fair Value	4.9	5
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Option Investments	53.3
Trading Securities at Fair Value	4.9	5
Investments, Fair Value Disclosure	5,468	5,178.50
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	0
Trading Securities at Fair Value	4.9	5
Investments, Fair Value Disclosure	446.7	417.9
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	0
Trading Securities at Fair Value	0	0
Investments, Fair Value Disclosure	4,307.40	4,133.90
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	53.3
Trading Securities at Fair Value	0	0
Investments, Fair Value Disclosure	713.9	626.7
Investments in Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	4,777.60	4,575
Investments in Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	129.2	121.2
Investments in Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	4,212.80	4,033.10
Investments in Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	435.6	420.7
US Government and Government Agencies and Authorities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	345.5	362.2
US Government and Government Agencies and Authorities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	129.2	121.2
US Government and Government Agencies and Authorities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	216.3	241
US Government and Government Agencies and Authorities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
States and Political Subdivisions [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,477.10	1,361
States and Political Subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
States and Political Subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,477.10	1,361
States and Political Subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Corporate Bonds and Notes [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	2,878.50	2,793.70
Corporate Bonds and Notes [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Corporate Bonds and Notes [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	2,517.90	2,429.60
Corporate Bonds and Notes [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	360.6	364.1
Redeemable Preferred Stocks [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6.7	7.4
Redeemable Preferred Stocks [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Redeemable Preferred Stocks [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Redeemable Preferred Stocks [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	6.7	7.4
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	64.4	44.7
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	64.4	44.7
Other Mortgage and Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	5.4	6
Other Mortgage and Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Other Mortgage and Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1.5	1.5
Other Mortgage and Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	3.9	4.5
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	632.2	598.5
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	312.6	291.7
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	94.6	100.8
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	225	206
Preferred Stock [Member] | Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	89.7	85.8
Preferred Stock [Member] | Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Preferred Stock [Member] | Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	84.7	80.8
Preferred Stock [Member] | Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	5	5
Preferred Stock [Member] | All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	19.8	24.4
Preferred Stock [Member] | All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Preferred Stock [Member] | All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	3.4	10.5
Preferred Stock [Member] | All Industries Other than Finance, Insurance and Real Estate [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16.4	13.9
Common Stock [Member] | 2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	57.2	104.6
Common Stock [Member] | 2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	50.9	95.1
Common Stock [Member] | 2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	5.7	7.3
Common Stock [Member] | 2000 to 3999 Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0.6	2.2
Common Stock [Member] | All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	76.6	84.9
Common Stock [Member] | All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	59	71.7
Common Stock [Member] | All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0.8	2.2
Common Stock [Member] | All Industries Other than Manufacturing [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16.8	11
Exchange Traded Funds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	202.7	124.9
Exchange Traded Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	202.7	124.9
Exchange Traded Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Exchange Traded Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unfunded commitments	97.9
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	186.2	173.9
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Limited Liability Companies and Limited Partnerships [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$186.20	$173.90

Fair_Value_Measurements_Quanti

Fair Value Measurements - Quantitative Information about Significant Unobservable Inputs (Details) (Market Approach Valuation Technique [Member], Fair Value, Inputs, Level 3 [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Collateralized Loan Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	64.4	44.7
Collateralized Loan Obligations [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	2.70%	3.20%
Collateralized Loan Obligations [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.10%	6.80%
Collateralized Loan Obligations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	5.20%	4.30%
Other Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	21.6	20.1
Investments in Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	435.6	420.7
External Credit Rating, Investment Grade [Member] | Private Placement [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	107	108.5
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	2.80%	1.00%
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	6.90%	6.00%
External Credit Rating, Investment Grade [Member] | Private Placement [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	3.90%	4.30%
External Credit Rating, Non Investment Grade [Member] | Senior Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	92.7	93.9
External Credit Rating, Non Investment Grade [Member] | Senior Debt Obligations [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	3.80%	4.20%
External Credit Rating, Non Investment Grade [Member] | Senior Debt Obligations [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	14.50%	15.60%
External Credit Rating, Non Investment Grade [Member] | Senior Debt Obligations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	10.60%	8.60%
External Credit Rating, Non Investment Grade [Member] | Junior Subordinated Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	149.9	153.5
External Credit Rating, Non Investment Grade [Member] | Junior Subordinated Debt [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.20%	8.80%
External Credit Rating, Non Investment Grade [Member] | Junior Subordinated Debt [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	21.00%	26.60%
External Credit Rating, Non Investment Grade [Member] | Junior Subordinated Debt [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	13.40%	14.20%

Fair_Value_Measurements_Level_

Fair Value Measurements - Level 3 Inputs Reconciliation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Level 1 to level 3 Transfers, Amount	$0	$0
Fair Value, Level 3 to level 1 Transfers, Amount	0	0
Fair Value, Level 1 to Level 2 Activity Transfers, Amount	0	0
Fair Value, Level 2 to Level 1 Activity Transfers, Amount	0	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	626,700,000	520,400,000
Included in Consolidated Statement of Income	0	-10,000,000
Included in Other Comprehensive Income	6,800,000	1,000,000
Purchases	347,400,000	270,100,000
Settlements	-172,100,000	-151,400,000
Sales	-96,600,000	-2,800,000
Transfers Into Level 3	3,600,000	8,200,000
Transfers out of Level 3	-1,900,000	-8,800,000
Balance at End of Year	713,900,000	626,700,000
Corporate Bonds and Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	364,100,000	361,000,000
Included in Consolidated Statement of Income	-3,400,000	-7,900,000
Included in Other Comprehensive Income	5,100,000	-7,800,000
Purchases	201,400,000	145,100,000
Settlements	-126,400,000	-123,200,000
Sales	-79,000,000	-100,000
Transfers Into Level 3	0	5,800,000
Transfers out of Level 3	-1,200,000	-8,800,000
Balance at End of Year	360,600,000	364,100,000
Redeemable Preferred Stocks [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	7,400,000	4,700,000
Included in Consolidated Statement of Income	0	200,000
Included in Other Comprehensive Income	-100,000	-1,300,000
Purchases	0	5,100,000
Settlements	-600,000	-1,300,000
Sales	0	0
Transfers Into Level 3	0	0
Transfers out of Level 3	0	0
Balance at End of Year	6,700,000	7,400,000
Collateralized Loan Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	44,700,000	0
Included in Consolidated Statement of Income	200,000	200,000
Included in Other Comprehensive Income	-1,000,000	400,000
Purchases	26,100,000	44,100,000
Settlements	0	0
Sales	-5,600,000	0
Transfers Into Level 3	0	0
Transfers out of Level 3	0	0
Balance at End of Year	64,400,000	44,700,000
Other Mortgage and Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	4,500,000	100,000
Included in Consolidated Statement of Income	100,000	100,000
Included in Other Comprehensive Income	100,000	-500,000
Purchases	0	4,500,000
Settlements	-800,000	-100,000
Sales	0	-2,000,000
Transfers Into Level 3	0	2,400,000
Transfers out of Level 3	0	0
Balance at End of Year	3,900,000	4,500,000
Preferred and Common Stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	32,100,000	13,300,000
Included in Consolidated Statement of Income	1,100,000	-1,000,000
Included in Other Comprehensive Income	500,000	4,600,000
Purchases	8,900,000	15,900,000
Settlements	-4,500,000	0
Sales	-2,200,000	-700,000
Transfers Into Level 3	3,600,000	0
Transfers out of Level 3	-700,000	0
Balance at End of Year	38,800,000	32,100,000
Other Equity Interests [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	173,900,000	141,300,000
Included in Consolidated Statement of Income	2,700,000	-1,600,000
Included in Other Comprehensive Income	2,200,000	5,600,000
Purchases	53,000,000	55,400,000
Settlements	-39,800,000	-26,800,000
Sales	-5,800,000	0
Transfers Into Level 3	0	0
Transfers out of Level 3	0	0
Balance at End of Year	186,200,000	173,900,000
Fair Value Option Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at Beginning of Year	0
Included in Consolidated Statement of Income	-700,000
Included in Other Comprehensive Income	0
Purchases	58,000,000
Settlements	0
Sales	-4,000,000
Transfers Into Level 3	0
Transfers out of Level 3	0
Balance at End of Year	$53,300,000

Related_Parties_Details

Related Parties (Details) (FS&C [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Related Party Transaction Amount of Assets in Defined Contributions Plans		$22.80	$20.40
Related Party Transaction Percent of Assets in Defined Contribution Plan Assets		6.00%	7.00%
Trinity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Assets Managed by Investment Advisory Firm under Director's Management	85.8	154.7	125.2
Reduction in Investment Assets Managed by a Directors Investment Advisory Firm	-80
Related Party Transaction, Expenses from Transactions with Related Party	0.3	0.4	0.3
Pension Plans, Defined Benefit [Member] | Investment Management Services for Defined Benefit Plan [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0.4	0.3	0.3
Assets under Management, Carrying Amount	$159.20	$148.60	$120.70

Quarterly_Financial_Informatio2

Quarterly Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues [Abstract]
Earned Premiums	$451.50	$462.80	$470.30	$477.60	$495.60	$507.50	$512.80	$509.90	$1,862.20	$2,025.80	$2,107.10
Net Investment Income	93.1	72.3	72.6	71.1	76.9	82.4	74.6	80.8	309.1	314.7	295.9
Other Income	0.6	0.5	0.2	0.1	0.3	0.1	0.2	0.2	1.4	0.8	0.8
Net Realized Gains on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Other-than-temporary Impairment Losses:
Total Other-than-temporary Impairment Losses	-6.5	-3.8	-4.1	-0.8	-7.6	-3.5	-2.3	-2.4	-15.2	-15.8	-7.2
Portion of Losses Recognized in Other Comprehensive Income	0	0	0	0	0	0.1	1.3	0.5	0	1.9	0.3
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Total Revenues	559.7	539.8	542.5	554.6	586	635.7	588.9	615.9	2,196.60	2,426.50	2,462.30
Expenses [Abstract]
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	285.8	300.5	347.5	327.9	315.5	338.3	354.2	349.2	1,261.70	1,357.20	1,582.10
Insurance Expenses	156.4	158.6	161.3	152.1	162.9	170.1	163.1	158.3	628.4	654.4	672.3
Write-off of Long-lived Asset	0	54.6	0	0					54.6	0	0
Interest and Other Expenses	24.4	22.1	22.5	22.7	26.2	25.3	25.2	23.8	91.7	100.5	85.5
Total Expenses	466.6	535.8	531.3	502.7	504.6	533.7	542.5	531.3	2,036.40	2,112.10	2,339.90
Income from Continuing Operations before Income Taxes	93.1	4	11.2	51.9	81.4	102	46.4	84.6	160.2	314.4	122.4
Income Tax Benefit (Expense)	-29.8	0.8	-1.9	-16.7	-26.6	-33.4	-13.9	-26	-47.6	-99.9	-30.6
Income from Continuing Operations	63.3	4.8	9.3	35.2	54.8	68.6	32.5	58.6	112.6	214.5	91.8
Income from Discontinued Operations	2.1	-0.1	0	-0.1	0.4	1.5	1.5	-0.2	1.9	3.2	11.6
Net Income	$65.40	$4.70	$9.30	$35.10	$55.20	$70.10	$34	$58.40	$114.50	$217.70	$103.40
Income (Loss) from Continuing Operations Per Unrestricted Share [Abstract]
Income from Continuing Operations Per Unrestricted Share - Basic	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.75	$1.55
Income from Continuing Operations Per Unrestricted Share - Diluted	$1.20	$0.09	$0.17	$0.63	$0.98	$1.21	$0.56	$1	$2.08	$3.74	$1.54
Net Income (Loss) Per Unrestricted Share [Abstract]
Net Income Per Unrestricted Share - Basic	$1.24	$0.09	$0.17	$0.63	$0.99	$1.24	$0.59	$1	$2.12	$3.81	$1.75
Net Income Per Unrestricted Share - Diluted	$1.24	$0.09	$0.17	$0.63	$0.99	$1.23	$0.59	$1	$2.12	$3.80	$1.74
Dividends Paid to Shareholders Per Share	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.24	$0.96	$0.96	$0.96

Schedule_1_Investments_Other_T1

Schedule 1 - Investments Other Than Investments in Related Parties (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	$5,933.10
Amount Carried in Balance Sheet	6,439.70
Fixed Maturities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	4,341.70
Fair Value	4,777.60
Amount Carried in Balance Sheet	4,777.60
US Government and Government Agencies and Authorities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	315.2
Fair Value	345.5
Amount Carried in Balance Sheet	345.5
States and Political Subdivisions [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	1,352.50
Fair Value	1,477.10
Amount Carried in Balance Sheet	1,477.10
Other Corporate Bonds and Notes [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	2,599.30
Fair Value	2,878.50
Amount Carried in Balance Sheet	2,878.50
Redeemable Preferred Stocks [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	5.9
Fair Value	6.7
Amount Carried in Balance Sheet	6.7
Collateralized Loan Obligations [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	64.9
Fair Value	64.4
Amount Carried in Balance Sheet	64.4
Other Mortgage and Asset-backed Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	3.9
Fair Value	5.4
Amount Carried in Balance Sheet	5.4
Equity Securities, Investment Summary [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	561.5
Fair Value	632.2
Amount Carried in Balance Sheet	632.2
Preferred Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	101.8
Fair Value	109.5
Amount Carried in Balance Sheet	109.5
Common Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	104.2
Fair Value	133.8
Amount Carried in Balance Sheet	133.8
Other Equity Interests [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	355.5
Fair Value	388.9
Amount Carried in Balance Sheet	388.9
Fair Value Option Investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	53.3
Fair Value	53.3
Amount Carried in Balance Sheet	53.3
Equity Method Limited Liability Investments at Cost Plus Cumulative Undistributed Earnings [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	184.8
Amount Carried in Balance Sheet	184.8
Loans, Real Estate and Other Investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	449.6
Amount Carried in Balance Sheet	449.6
Short-term Investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amortized Cost	342.2
Amount Carried in Balance Sheet	$342.20

Schedule_2_Parent_Company_Fina1

Schedule 2 - Parent Company Financial Statements - Balance Sheets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Investments in Subsidiaries	$184,800,000	$245,100,000
Fixed Maturities at Fair Value (Amortized Cost: 2014 – $12.2)	4,777,600,000	4,575,000,000
Fair Value Option Investments	53,300,000	0
Short-term Investments	342,200,000	284,700,000
Cash	76,100,000	66,500,000	96,300,000	251,200,000
Other Receivables	187,000,000	193,100,000
Other Assets	220,200,000	267,400,000
Total Assets	7,833,400,000	7,656,400,000
LIABILITIES AND SHAREHOLDERS’ EQUITY
Notes Payable	752,100,000	606,900,000
Liabilities for Income Taxes	36,500,000	8,300,000
Accrued Expenses and Other Liabilities	409,600,000	329,800,000
Total Liabilities	5,742,700,000	5,604,900,000
Shareholders’ Equity:
Additional Paid-in Capital	660,100,000	694,800,000
Retained Earnings	1,202,700,000	1,215,800,000
Accumulated Other Comprehensive Income	222,700,000	135,300,000
Total Shareholders’ Equity	2,090,700,000	2,051,500,000	2,161,700,000	2,116,600,000
Total Liabilities and Shareholders’ Equity	7,833,400,000	7,656,400,000
Parent Company [Member]
ASSETS
Investments in Subsidiaries	2,677,500,000	2,614,000,000
Fixed Maturities at Fair Value (Amortized Cost: 2014 – $12.2)	12,200,000	0
Equity Securities at Fair Value (Cost: 2014 – $21.9; 2013 – $4.7)	21,800,000	5,000,000
Fair Value Option Investments	53,300,000	0
Short-term Investments	225,100,000	130,800,000
Cash	17,900,000	20,800,000	2,200,000	122,400,000
Other Receivables	6,900,000	4,900,000
Current and Deferred Income Taxes	4,700,000	35,000,000
Other Assets	5,600,000	7,300,000
Total Assets	3,025,000,000	2,817,800,000
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities for Income Taxes	14,500,000	90,500,000
Liabilities for Benefit Plans	160,200,000	63,900,000
Accrued Expenses and Other Liabilities	7,500,000	5,000,000
Total Liabilities	934,300,000	766,300,000
Shareholders’ Equity:
Common Stock	5,200,000	5,600,000
Additional Paid-in Capital	660,100,000	694,800,000
Retained Earnings	1,202,700,000	1,215,800,000
Accumulated Other Comprehensive Income	222,700,000	135,300,000
Total Shareholders’ Equity	2,090,700,000	2,051,500,000
Total Liabilities and Shareholders’ Equity	3,025,000,000	2,817,800,000
Parent Company [Member] | Senior Notes, 6% Due May 15, 2017 [Member]
LIABILITIES AND SHAREHOLDERS’ EQUITY
Notes Payable	358,500,000	357,900,000
Parent Company [Member] | Senior Notes, 6% Due November 30, 2015 [Member]
LIABILITIES AND SHAREHOLDERS’ EQUITY
Notes Payable	249,500,000	249,000,000
Parent Company [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
LIABILITIES AND SHAREHOLDERS’ EQUITY
Notes Payable	$144,100,000	$0

Schedule_2_Parent_Company_Fina2

Schedule 2 - Parent Company Financial Statements - Balance Sheets (Parenthetical) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Amortized Cost of Fixed Maturity Securities	$4,341.70	$4,370.50
Fair Value of Notes Payable	804.4	667.1
Senior Notes [Member] | Senior Notes Payable, 6.00% due 2017 [Member]
Senior Notes Payable, Interest Rate	6.00%
Senior Notes [Member] | Senior Notes Payable, 6.00% due 2015 [Member]
Senior Notes Payable, Interest Rate	6.00%
Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Senior Notes Payable, Interest Rate	7.38%
Parent Company [Member]
Amortized Cost of Fixed Maturity Securities	12.2	0
Equity Securities at Cost	21.9	4.7
Parent Company [Member] | Senior Notes [Member] | Senior Notes Payable, 6.00% due 2017 [Member]
Fair Value of Notes Payable	390.2	395.5
Senior Notes Payable, Interest Rate	6.00%	6.00%
Parent Company [Member] | Senior Notes [Member] | Senior Notes Payable, 6.00% due 2015 [Member]
Fair Value of Notes Payable	260.2	271.6
Senior Notes Payable, Interest Rate	6.00%	6.00%
Parent Company [Member] | Subordinated Debt [Member] | Subordinated Debenture, 7.375 Percent Due 2054 [Member]
Fair Value of Notes Payable	$154

Schedule_2_Parent_Company_Fina3

Schedule 2 - Parent Company Financial Statements - Statements of Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net Investment Income	$93.10	$72.30	$72.60	$71.10	$76.90	$82.40	$74.60	$80.80	$309.10	$314.70	$295.90
Net Realized Gains (Losses) on Sales of Investments	21	8	3.5	6.6	20.8	49.1	2.3	26.9	39.1	99.1	65.4
Net Impairment Losses Recognized in Earnings	-6.5	-3.8	-4.1	-0.8	-7.6	-3.4	-1	-1.9	-15.2	-13.9	-6.9
Total Revenues	559.7	539.8	542.5	554.6	586	635.7	588.9	615.9	2,196.60	2,426.50	2,462.30
Total Expenses	466.6	535.8	531.3	502.7	504.6	533.7	542.5	531.3	2,036.40	2,112.10	2,339.90
Income Tax Benefit	-29.8	0.8	-1.9	-16.7	-26.6	-33.4	-13.9	-26	-47.6	-99.9	-30.6
Net Income	65.4	4.7	9.3	35.1	55.2	70.1	34	58.4	114.5	217.7	103.4
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net Investment Income									0.9	0.2	0.2
Net Realized Gains (Losses) on Sales of Investments									-0.2	0.6	0.3
Net Impairment Losses Recognized in Earnings									-1.7	0	0
Total Revenues									-1	0.8	0.5
Interest Expense									47.9	39	39.5
Other Operating Expenses									2.7	21.6	13.6
Total Expenses									50.6	60.6	53.1
Loss before Income Taxes and Equity in Net Income of Subsidiaries									-51.6	-59.8	-52.6
Income Tax Benefit									18.9	20.8	18.2
Loss before Equity in Net Income of Subsidiaries									-32.7	-39	-34.4
Equity in Net Income of Subsidiaries									147.2	256.7	137.8
Net Income									$114.50	$217.70	$103.40

Schedule_2_Parent_Company_Fina4

Schedule 2 - Parent Company Financial Statements - Statements of Comprehensive Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net Income	$65.40	$4.70	$9.30	$35.10	$55.20	$70.10	$34	$58.40	$114.50	$217.70	$103.40
Unrealized Holding Gains (Losses) Arising During the Year:
Securities Held by Parent									259.7	-324.9	157.9
Reclassification Adjustment for Amounts Included in Net Income:
Securities Held by Parent									-25.1	-37.9	-61.2
Unrealized Holding Gains (Losses)									-234.6	362.8	-96.7
Unrecognized Postretirement Benefit Costs Arising During the Year									-106.4	61.6	-29.4
Net Unrecognized Postretirement Benefit Costs									-98.5	86.6	-13.2
Foreign Currency Translation Adjustments									-1	0.2	1.6
Reclassification Adjustment for Amounts Included in Net Income									0	0	0
Foreign Currency Translation Adjustments									-1	0.2	1.6
Other Comprehensive Income (Loss) Before Income Taxes									135.1	-276	85.1
Income Tax Benefit (Expense):
Securities Held by Parent									91.6	-115.9	55.9
Securities Held by Parent									-8.8	-13.2	-21.5
Unrealized Holding Gains and Losses									-82.8	129.1	-34.4
Unrecognized Postretirement Benefit Costs Arising During the Year									37.5	-21.6	10.3
Net Unrecognized Postretirement Benefit Costs									34.7	-30.4	4.6
Foreign Currency Translation Adjustments									0.4	-0.1	-0.6
Reclassification Adjustment for Amounts Included in Net Income									0	0	0
Foreign Currency Translation Adjustment									0.4	-0.1	-0.6
Other Comprehensive Income Tax Benefit (Expense)									-47.7	98.6	-30.4
Other Comprehensive Income (Loss)									87.4	-177.4	54.7
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net Income									114.5	217.7	103.4
Unrealized Holding Gains (Losses) Arising During the Year:
Securities Held by Subsidiaries									261.7	-324.9	157.9
Securities Held by Parent									-2	0	0
Reclassification Adjustment for Amounts Included in Net Income:
Securities Held by Subsidiaries									-26.8	-37.9	-61.2
Securities Held by Parent									1.7	0	0
Unrealized Holding Gains (Losses)									-234.6	362.8	-96.7
Unrecognized Postretirement Benefit Costs Arising During the Year									-106.4	61.6	-29.4
Amortization of Unrecognized Postretirement Benefit Costs									7.9	25	16.2
Net Unrecognized Postretirement Benefit Costs									-98.5	86.6	-13.2
Foreign Currency Translation Adjustments									-1	0.2	1.6
Reclassification Adjustment for Amounts Included in Net Income									0	0	0
Foreign Currency Translation Adjustments									-1	0.2	1.6
Other Comprehensive Income (Loss) Before Income Taxes									135.1	-276	85.1
Income Tax Benefit (Expense):
Securities Held by Subsidiaries									-92.3	115.9	-55.9
Securities Held by Parent									-0.7	0	0
Securities Held by Subsidiaries									9.4	13.2	21.5
Securities Held by Parent									0.6	0	0
Unrealized Holding Gains and Losses									-82.8	129.1	-34.4
Unrecognized Postretirement Benefit Costs Arising During the Year									37.5	-21.6	10.3
Amortization of Unrecognized Postretirement Benefit Costs									-2.8	-8.8	-5.7
Net Unrecognized Postretirement Benefit Costs									34.7	-30.4	4.6
Foreign Currency Translation Adjustments									0.4	-0.1	-0.6
Reclassification Adjustment for Amounts Included in Net Income									0	0	0
Foreign Currency Translation Adjustment									0.4	-0.1	-0.6
Other Comprehensive Income Tax Benefit (Expense)									-47.7	98.6	-30.4
Other Comprehensive Income (Loss)									87.4	-177.4	54.7
Total Comprehensive Income									$201.90	$40.30	$158.10

Schedule_2_Parent_Company_Fina5

Schedule 2 - Parent Company Financial Statements - Statements of Cash Flows (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net Income	$114.50	$217.70	$103.40
Adjustment Required to Reconcile Net Income to Net Cash Provided by Operations:
Net Realized (Gains) Losses on Sales of Investments	-39.1	-99.1	-65.4
Net Impairment Losses Recognized in Earnings	15.2	13.9	6.9
Other, Net	16.4	36.1	33.4
Net Cash Provided by Operating Activities	133.6	122.1	65.7
Investing Activities:
Sales, Paydowns and Maturities of Fixed Maturities	573.7	664.4	914.4
Sales of Equity Securities	245.3	182.1	70.8
Sales of Fair Value Option Investments	6.9	0	0
Purchases of Fair Value Option Investments	-60.9	0	0
Change in Short-term Investments	-63.9	41.8	-80
Net Cash Provided (Used) by Investing Activities	-104.3	4.8	-106.2
Financing Activities:
Cash Dividends Paid	-51.8	-54.9	-56.9
Common Stock Repurchases	-114	-100.4	-60.7
Cash Exercise of Stock Options	0.5	1.7	1.3
Net Cash Used by Financing Activities	-19.7	-156.7	-114.4
Increase (Decrease) in Cash	9.6	-29.8	-154.9
Cash, Beginning of Year	66.5	96.3	251.2
Cash, End of Year	76.1	66.5	96.3
Parent Company [Member]
Operating Activities:
Net Income	114.5	217.7	103.4
Adjustment Required to Reconcile Net Income to Net Cash Provided by Operations:
Equity in Net Income of Subsidiaries	-147.2	-256.7	-137.8
Cash Dividends from Subsidiaries	159.1	95	95
Cash Contribution to Defined Benefit Plan	0	-55	0
Net Realized (Gains) Losses on Sales of Investments	0.2	-0.6	-0.3
Net Impairment Losses Recognized in Earnings	1.7	0	0
Other, Net	10.5	67.3	8.5
Net Cash Provided by Operating Activities	138.8	67.7	68.8
Investing Activities:
Capital Distribution from Subsidiary	1.1	50.5	20
Sales, Paydowns and Maturities of Fixed Maturities	11.5	0	13.1
Sales of Equity Securities	15.1	0	0
Sales of Fair Value Option Investments	6.9	0	0
Purchases of Fair Value Option Investments	-60.9	0	0
Change in Short-term Investments	-94.3	52.7	-106.3
Net Cash Provided (Used) by Investing Activities	-120.6	103.2	-73.2
Financing Activities:
Net Proceeds from Issuance of Subordinated Debentures	144	0	0
Cash Dividends Paid	-51.8	-54.9	-56.9
Common Stock Repurchases	-114	-100.4	-60.7
Cash Exercise of Stock Options	0.5	1.7	1.3
Excess Tax Benefits on Share Based Awards	0.2	1.3	0.5
Net Cash Used by Financing Activities	-21.1	-152.3	-115.8
Increase (Decrease) in Cash	-2.9	18.6	-120.2
Cash, Beginning of Year	20.8	2.2	122.4
Cash, End of Year	$17.90	$20.80	$2.20

Schedule_3_Supplementary_Insur1

Schedule 3 - Supplementary Insurance Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Supplementary Insurance Information, by Segment [Line Items]
Premiums	$1,862.20		$2,025.80		$2,107.10
Other Income	1.4		0.8		0.8
Net Investment Income	309.1		314.7		295.9
Insurance Claims and Policyholders' Benefits	1,261.70		1,357.20		1,582
Amortization of Deferred Policy Acquisition Costs	235.4		253.9		257
Other Insurance Expenses	393		400.5		415.3
Deferred Policy Acquisition Costs	303.3		302.9
Insurance Reserves	4,007.60		4,061
Unearned Premiums	536.9		598.9
Property and Casualty Insurance [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premiums	1,249.50		1,392.90		1,467.20
Premiums Written	1,189.10		1,342.20		1,454.10
Other Income	0.5		0.5		0.7
Net Investment Income	72.7		90.9		77.9
Insurance Claims and Policyholders' Benefits	887.3		969.3		1,188.90
Amortization of Deferred Policy Acquisition Costs	187.5		207.2		212.6
Other Insurance Expenses	166.2		168.2		179.9
Deferred Policy Acquisition Costs	78.2		85.7
Insurance Reserves	651.1		742.6
Unearned Premiums	509.7		570.3
Life and Health Insurance [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premiums	612.7	[1]	632.9	[1]	639.9	[1]
Other Income	0.9	[1]	0.2	[1]	0.1	[1]
Net Investment Income	218.7	[1]	209.9	[1]	204.3	[1]
Insurance Claims and Policyholders' Benefits	374.4	[1]	387.9	[1]	393.1	[1]
Amortization of Deferred Policy Acquisition Costs	47.9	[1]	46.7	[1]	44.4	[1]
Other Insurance Expenses	268.1	[1]	271.5	[1]	266.4	[1]
Deferred Policy Acquisition Costs	225.1	[1]	217.2	[1]
Insurance Reserves	3,278.20	[1]	3,222.80	[1]
Unearned Premiums	27.2	[1]	28.6	[1]
Other Segments [Member]
Supplementary Insurance Information, by Segment [Line Items]
Premiums	0		0		0
Other Income	0		0.1		0
Net Investment Income	17.7		13.9		13.7
Insurance Claims and Policyholders' Benefits	0		0		0
Amortization of Deferred Policy Acquisition Costs	0		0		0
Other Insurance Expenses	-41.3		-39.2		-31
Deferred Policy Acquisition Costs	0		0
Insurance Reserves	78.3		95.6
Unearned Premiums	$0		$0
[1]	The Company’s Life & Health Insurance employee-agents also market certain property and casualty insurance products under common management. Accordingly, the Company includes the results of these property and casualty insurance products in its Life & Health Insurance segment.

Schedule_4_Reinsurance_Schedul1

Schedule 4 - Reinsurance Schedule (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums, Life Insurance in Force	$20,565.90				$21,006				$20,565.90	$21,006	$21,340.40
Direct Premiums Earned									1,831.10	2,007	2,105.60
Ceded Premiums, Life Insurance in Force	541.5				576.4				541.5	576.4	610.4
Ceded to Other Companies									26	33.9	42.5
Assumed Premiums, Life Insurance in Force	217.8				229.5				217.8	229.5	242.9
Assumed Premiums Earned									57.1	52.7	44
Premiums, Net, Life Insurance in Force	20,242.20				20,659.10				20,242.20	20,659.10	20,972.90
Net Amount	451.5	462.8	470.3	477.6	495.6	507.5	512.8	509.9	1,862.20	2,025.80	2,107.10
Life Insurance in Force Premiums, Percentage Assumed to Net	1.10%				1.10%				1.10%	1.10%	1.20%
Premiums, Percentage Assumed to Net									3.10%	2.60%	2.10%
Life Insurance Product Line [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned									387.5	392.4	392.8
Ceded to Other Companies									1.5	1.5	1.4
Assumed Premiums Earned									1.6	1.8	2
Net Amount									387.6	392.7	393.4
Premiums, Percentage Assumed to Net									0.40%	0.50%	0.50%
Accident and Health Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned									146.3	161.9	165.5
Ceded to Other Companies									0.5	0.6	0.4
Assumed Premiums Earned									2.8	0.1	0.1
Net Amount									148.6	161.4	165.2
Premiums, Percentage Assumed to Net									1.90%	0.10%	0.10%
Property, Liability and Casualty Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct Premiums Earned									1,297.30	1,452.70	1,547.30
Ceded to Other Companies									24	31.8	40.7
Assumed Premiums Earned									52.7	50.8	41.9
Net Amount									$1,326	$1,471.70	$1,548.50
Premiums, Percentage Assumed to Net									4.00%	3.50%	2.70%