Stancorp Financial (SFG) 10-Q 5 Nov 14 2014 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 24, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Amendment Flag	'false	'
Entity Registrant Name	'STANCORP FINANCIAL GROUP INC	'
Entity Central Index Key	'0001079577	'
Entity Current Reporting Status	'Yes	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Common Stock, Shares Outstanding	'	42,040,030
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'

Unaudited_Condensed_Consolidat

Unaudited Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Premiums	$507.30	$524.40	$1,536.60	$1,595.70
Administrative fees	32.8	30.5	97	89.6
Net investment income	147.1	155.8	447.5	469.1
Net capital gains (losses):	'	'	'	'
Total other-than-temporary impairment losses on fixed maturity securities-available-for-sale	-0.3	-0.4	-0.4	-1
All other net capital gains (losses)	-4.9	-8.3	-6.4	-11.9
Total net capital gains (losses)	-5.2	-8.7	-6.8	-12.9
Total revenues	682	702	2,074.30	2,141.50
Benefits and expenses:	'	'	'	'
Benefits to policyholders	360.8	395	1,188.10	1,260.90
Interest credited	38.7	43.9	122.8	130.8
Operating expenses	119.9	114.8	348.3	324.3
Commissions and bonuses	53.2	51.9	154.7	156.5
Premium taxes	7.5	9.1	24.7	27.7
Interest expense	7.8	8.6	24.1	25.7
Net decrease (increase) in DAC, VOBA, and other intangibles	-2.8	-3.1	-2	-5
Total benefits and expenses	585.1	620.2	1,860.70	1,920.90
Income before income taxes	96.9	81.8	213.6	220.6
Income taxes	25.8	22.8	50.5	57.1
Net income	$71.10	$59	$163.10	$163.50
Net income per common share:	'	'	'	'
Basic	$1.66	$1.33	$3.76	$3.69
Diluted	$1.65	$1.32	$3.73	$3.67
Weighted-average common shares outstanding:	'	'	'	'
Basic	42,777,337	44,271,160	43,324,269	44,307,863
Diluted weighted-average common shares outstanding	43,184,170	44,610,358	43,736,832	44,514,600

Unaudited_Condensed_Consolidat1

Unaudited Condensed Consolidated Statements of Comprehensive (Loss) Income (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Unaudited Condensed Consolidated Statements Of Income And Comprehensive Income	'		'		'		'
Net income	$71,100,000		$59,000,000		$163,100,000		$163,500,000
Other comprehensive income (loss), net of tax:	'		'		'		'
Net unrealized capital gains (losses) on fixed maturity securities-available-for-sale	-37,000,000	[1]	-7,800,000	[1]	55,300,000	[1]	-176,000,000	[1]
Reclassification adjustment for net capital gains included in net income	-600,000	[2]	300,000	[2]	-2,100,000	[2]	-3,800,000	[2]
Employee benefit plans:	'		'		'		'
Prior service credit and net losses arising during the period, net	0	[3]	0	[3]	-400,000	[3]	0	[3]
Reclassification adjustment for amortization to net periodic pension cost (credit), net	400,000	[4]	1,900,000	[4]	1,200,000	[4]	-7,800,000	[4]
Total other comprehensive income (loss), net of tax	-37,200,000		-5,600,000		54,000,000		-187,600,000
Comprehensive income (loss)	$33,900,000		$53,400,000		$217,100,000		($24,100,000)
[1]	Net of tax benefits of $20.0 million and $4.2 million for the third quartersof 2014 and 2013, respectively, and tax expense of $27.2million andtax benefit of $95.9 million for the first nine months of 2014 and 2013, respectively.
[2]	Net of tax benefit of $0.3 million and tax expense of $0.2 million for thethird quartersof 2014 and 2013, respectively, and tax benefits of $1.1million and $2.3 million for the first nine months of 2014 and 2013, respectively.
[3]	Net of tax benefit of $0.3 million for the first nine months of2014.
[4]	Net of taxexpenses of $0.2 million and$1.1 million for the third quartersof 2014 and 2013, respectively, and tax expenseof $0.7 million andtax benefit of $4.2 million for the first nine months of 2014 and 2013, respectively.

Unaudited_Condensed_Consolidat2

Unaudited Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Available-for-sale securities other comprehensive income, tax effect:	'	'	'	'
Tax effect on unrealized capital gains (losses) on securities-available-for-sale	($20)	($4.20)	$27.20	($95.90)
Reclassification adjustment for net capital gains included in net income, tax effect	-0.3	0.2	-0.2	-2.3
Employee benefit plans, tax effect:	'	'	'	'
Prior service credit and net losses arising during the period, tax effect	0	0	0.3	0
Reclassification adjustment for amortization to net periodic pension cost, tax effect	$0.20	$1.10	$0.70	($4.20)

Unaudited_Condensed_Consolidat3

Unaudited Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
ASSETS	'	'	'
Fixed maturity securities-available-for-sale (amortized cost of $7,268.4 and $6,811.9)	$7,654.60	$7,120.50	'
Commercial mortgage loans, net	5,342.60	5,405.10	'
Real estate, net	44.3	65.7	'
Other invested assets	284.8	196.5	'
Total investments	13,326.30	12,787.80	'
Cash and cash equivalents	263.3	379.3	160.7
Premiums and other receivables	132	118.2	'
Accrued investment income	108.1	106.8	'
Amounts recoverable from reinsurers	987.4	988.1	'
Deferred acquisition costs, value of business acquired and other intangible assets, net	376.2	371.3	346.5
Goodwill	36	36	'
Property and equipment, net	82.6	84.7	'
Other assets	94.9	127.9	'
Separate account assets	7,031.90	6,393.20	'
Total assets	22,438.70	21,393.30	'
Liabilities:	'	'	'
Future policy benefits and claims	5,818	5,846.90	'
Other policyholder funds	6,372.20	6,051.60	'
Deferred tax liabilities, net	91.5	64.7	'
Short-term debt	1.2	1.5	'
Long-term debt	503.7	551.9	'
Other liabilities	352.9	330.7	'
Separate account liabilities	7,031.90	6,393.20	'
Total liabilities	20,171.40	19,240.50	'
Commitments and contingencies (See Note 10)	'	'	'
Shareholders' equity:	'	'	'
Preferred stock, 100,000,000 shares authorized; none issued	0	0	'
Common stock, no par, 300,000,000 shares authorized; 42,475,479 and 44,126,389 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	0	68	89.6
Accumulated other comprehensive income	188.7	134.7	309.3
Retained earnings	2,078.60	1,950.10	1,770.10
Total shareholders' equity	2,267.30	2,152.80	2,169
Total liabilities and shareholders' equity	$22,438.70	$21,393.30	'

Unaudited_Condensed_Consolidat4

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Consolidated Balance Sheets (Parenthetical) [Abstract]	'	'
Amortized cost of fixed maturity securities-available-for-sale	$7,268,400,000	$6,811,900,000
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	42,475,479	44,126,389
Common Stock, no par value	$0	$0

Unaudited_Condensed_Consolidat5

Unaudited Condensed Consolidated Statements Of Changes In Shareholders' Equity (USD $)	Total	Parent [Member]	Common Stock	Accumulated Other Comprehensive Income	Retained Earnings
Balance at Dec. 31, 2012	$2,169,000,000	'	$89,600,000	$309,300,000	$1,770,100,000
Balance, shares at Dec. 31, 2012	'	'	44,419,448	'	'
Changes in Shareholders' Equity	'	'	'	'	'
Net income	228,500,000	'	'	'	228,500,000
Other comprehensive income, net of tax	-174,600,000	'	'	-174,600,000	'
Common stock:	'	'	'	'	'
Repurchased	-82,300,000	'	-82,300,000	'	'
Shares repurchased	'	'	-1,644,488	'	'
Issued under share-based compensation plans, net	60,700,000	'	60,700,000	'	'
Issued under share-based compensation plans net, shares	'	'	1,351,429	'	'
Dividends declared on common stock ($1.10 per share)	-48,500,000	'	'	'	-48,500,000
Balance at Dec. 31, 2013	2,152,800,000	'	68,000,000	134,700,000	1,950,100,000
Balance, shares at Dec. 31, 2013	'	'	44,126,389	'	'
Changes in Shareholders' Equity	'	'	'	'	'
Net income	163,100,000	'	'	'	163,100,000
Other comprehensive income, net of tax	54,000,000	'	'	54,000,000	'
Common stock:	'	'	'	'	'
Repurchased	-119,100,000	'	-84,500,000	'	-34,600,000
Shares repurchased	'	'	-1,936,976	'	'
Issued under share-based compensation plans, net	16,500,000	'	16,500,000	'	'
Issued under share-based compensation plans net, shares	'	'	286,066	'	'
Balance at Sep. 30, 2014	$2,267,300,000	$2,267,300,000	$0	$188,700,000	$2,078,600,000
Balance, shares at Sep. 30, 2014	'	'	42,475,479	'	'

Unaudited_Condensed_Consolidat6

Unaudited Condensed Consolidated Statements Of Changes In Shareholders' Equity (Parentheticals) (USD $)	12 Months Ended
	Dec. 31, 2013
Consolidated Statements Of Changes In Shareholders' Equity	'
Common stock dividends per share cash paid	$1.10

Unaudited_Condensed_Consolidat7

Unaudited Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating:	'	'
Net income	$163,100,000	$163,500,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Net realized capital losses	6,800,000	12,900,000
Depreciation and amortization	88,500,000	84,700,000
Deferral of acquisition costs, value of business acquired and other intangible assets, net	-58,900,000	-57,900,000
Deferred income taxes	-700,000	8,100,000
Changes in other assets and liabilities:	'	'
Receivables and accrued income	-14,400,000	-10,800,000
Future policy benefits and claims	-30,100,000	29,200,000
Other, net	63,700,000	22,900,000
Net cash provided by operating activities	218,000,000	252,600,000
Investing:	'	'
Proceeds from sale, maturity, or repayment of fixed maturity securities-available-for-sale	554,600,000	792,500,000
Proceeds from sale or repayment of commercial mortgage loans	982,200,000	776,100,000
Proceeds from sale of real estate	16,600,000	9,900,000
Proceeds from sale of other invested assets	14,900,000	200,000
Acquisition of fixed maturity securities-available-for-sale	-1,037,400,000	-927,100,000
Acquisition or origination of commercial mortgage loans	-930,300,000	-1,037,400,000
Acquisition of real estate	-800,000	-600,000
Acquisition of other invested assets	-87,400,000	-53,700,000
Acquisition of property and equipment, net	-12,700,000	-8,700,000
Net cash used in investing activities	-500,300,000	-448,800,000
Financing:	'	'
Policyholder fund deposits	2,233,300,000	1,516,800,000
Policyholder fund withdrawals	-1,912,700,000	-1,102,800,000
Repayment of debt	-47,100,000	0
Issuance of debt, net of issuance costs	0	0
Issuance of common stock	12,200,000	37,500,000
Repurchases of common stock	-119,100,000	-70,900,000
Other financing activity, net	-300,000	300,000
Net cash provided by financing activities	166,300,000	380,900,000
Increase (Decrease) in cash and cash equivalents	-116,000,000	184,700,000
Cash and cash equivalents, beginning of period	379,300,000	160,700,000
Cash and cash equivalents, end of period	263,300,000	345,400,000
Cash paid (received) during the period for:	'	'
Interest	150,800,000	143,900,000
Income taxes	32,500,000	29,300,000
Non-cash transactions:	'	'
Real estate acquired through commercial mortgage loan foreclosure	4,400,000	6,100,000
Commercial mortgage loans originated on real estate sold	$600,000	$700,000

Organization_Principles_Of_Con

Organization, Principles Of Consolidation And Basis Of Presentation	9 Months Ended
	Sep. 30, 2014
Organization, Principles Of Consolidation And Basis Of Presentation [Abstract]	'
Organization, Principles Of Consolidation And Basis Of Presentation	'
	NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
	As used in this Form 10-Q, the terms “StanCorp,” “Company,” “we,” “us” and “our” refer to StanCorp Financial Group, Inc. and its subsidiaries, unless the context otherwise requires.
	1. ORGANIZATION, PRINCIPLES OF CONSOLIDATION AND BASIS OF PRESENTATION
	StanCorp, headquartered in Portland, Oregon, is a holding company and conducts business through wholly-owned operating subsidiaries throughout the United States. Through its subsidiaries, StanCorp has the authority to underwrite insurance products in all 50 states. The Company collectively views and operates its businesses as Insurance Services and Asset Management. Insurance Services contains two reportable product segments, Employee Benefits and Individual Disability. Asset Management is a separate reportable segment. See “Note 5—Segments.”
	StanCorp has the following wholly-owned operating subsidiaries: Standard Insurance Company (“Standard”), The Standard Life Insurance Company of New York, Standard Retirement Services, Inc. (“Standard Retirement Services”), StanCorp Equities, Inc. (“StanCorp Equities”), StanCorp Mortgage Investors, LLC (“StanCorp Mortgage Investors”), StanCorp Investment Advisers, Inc. (“StanCorp Investment Advisers”), StanCorp Real Estate, LLC (“StanCorp Real Estate”), Standard Management, Inc. (“Standard Management”) and StanCap Insurance Company, Inc. (“StanCap Insurance Company”).
	Standard, the Company’s largest subsidiary, underwrites group and individual disability insurance and annuity products, group life and accidental death and dismemberment (“AD&D”) insurance, and provides group dental and group vision insurance, absence management services and retirement plan products. Founded in 1906, Standard is domiciled in Oregon, licensed in all states except New York, and licensed in the District of Columbia and the U.S. territories of Guam, Puerto Rico and the Virgin Islands.
	The Standard Life Insurance Company of New York was organized in 2000 and is licensed to provide group and individual disability insurance, group life and AD&D insurance and group dental and vision insurance in New York.
	The Standard is a service mark of StanCorp and its subsidiaries and is used as a brand mark and marketing name by Standard and The Standard Life Insurance Company of New York.
	Standard Retirement Services administers and services StanCorp’s retirement plans group annuity contracts and trust products. Retirement plan products are offered in all 50 states through Standard or Standard Retirement Services.
	StanCorp Equities is a limited broker-dealer and member of the Financial Industry Regulatory Authority. As a wholesaler, StanCorp Equities’ activities are limited to soliciting and supporting third-party broker-dealers and investment advisers that offer or advise their retirement plan clients on using an unregistered group annuity contract or a mutual fund trust platform.
	StanCorp Mortgage Investors originates and services fixed-rate commercial mortgage loans for the investment portfolios of the Company’s insurance subsidiaries. StanCorp Mortgage Investors also generates additional fee income from the origination and servicing of commercial mortgage loans participated to institutional investors.
	StanCorp Investment Advisers is a Securities and Exchange Commission (“SEC”) registered investment adviser providing performance analysis, fund selection support, model portfolios and other investment advisory, financial planning, and investment management services to its retirement plan clients, individual investors and subsidiaries of StanCorp.
	StanCorp Real Estate is a property management company that owns and manages the Hillsboro, Oregon home office properties and other properties held for investment and held for sale. StanCorp Real Estate also manages the Portland, Oregon home office properties.
	Standard Management manages certain real estate properties held for sale from time to time in conjunction with the Company’s real estate business.
	StanCap Insurance Company is a pure captive insurance company domiciled in Oregon. Effective September 30, 2014, StanCap Insurance Company entered into a reinsurance agreement with Standard to reinsure Standard’s group life and AD&D insurance business.
	Standard holds interests in tax-advantaged investments. These interests are accounted for under the equity method of accounting. The carrying value of these interests was $262.1 million and $192.4 million at September 30, 2014 and December 31, 2013, respectively.
	The accompanying unaudited condensed consolidated financial statements of StanCorp and its subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in conformance with the requirements of Form 10-Q pursuant to the rules and regulations of the SEC. As such, they do not include all of the information and disclosures required by GAAP for complete financial statements. Intercompany balances and transactions have been eliminated on a consolidated basis. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the financial statement date, and the reported amounts of revenues and expenses during the period. Actual results may differ from those estimates. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation of the Company’s financial condition at September 30, 2014, and for the results of operations for the three and nine months ended September 30, 2014 and 2013, and cash flows for the nine months ended September 30, 2014 and 2013. Interim results for the three and nine months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. This report should be read in conjunction with the Company’s 2013 annual report on Form 10-K.

Net_Income_Per_Common_Share

Net Income Per Common Share	9 Months Ended
	Sep. 30, 2014
Net Income Per Common Share [Abstract]	'
Net Income Per Common Share	'
	2. NET INCOME PER COMMON SHARE
	Net income per basic common share was calculated by dividing net income by the weighted-average common shares outstanding. Net income per diluted common share was calculated using the treasury stock method and reflects the dilutive effects of stock awards and potential exercises of dilutive outstanding stock options. Diluted weighted-average common shares outstanding does not include stock options with an option exercise price greater than the average market price because they are antidilutive and inclusion would increase net income per diluted common share.
	The following table sets forth the calculation of net income per basic and diluted weighted-average common shares outstanding:
			Three Months Ended				Nine Months Ended
			September 30,				September 30,
			2014		2013		2014		2013
	Net income (In millions)		$	71.1	$	59	$	163.1	$	163.5
	Basic weighted-average common shares outstanding			42,777,337		44,271,160		43,324,269		44,307,863
	Stock options			362,634		273,338		372,615		146,247
	Stock awards			44,199		65,860		39,948		60,490
	Diluted weighted-average common shares outstanding			43,184,170		44,610,358		43,736,832		44,514,600
	Net income per common share:
		Basic	$	1.66	$	1.33	$	3.76	$	3.69
		Diluted		1.65		1.32		3.73		3.67
	Antidilutive shares not included in net income per diluted common
		share calculation		150,475		---		54,986		559,575

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2014
Share-Based Compensation	'
Share-Based Compensation	'
	3. SHARE-BASED COMPENSATION
	The Company has two active share-based compensation plans: the 2002 Stock Incentive Plan (“2002 Plan”) and the 1999 Employee Share Purchase Plan (“ESPP”). The 2002 Plan authorizes the Board of Directors to grant incentive or non-statutory stock options and stock awards to eligible employees and certain specified parties. The Company’s ESPP allows eligible employees to purchase StanCorp common stock at a discount. Of the 7,000,000 shares of common stock authorized for the 2002 Plan, 2,615,674 shares or options for shares remain available for grant at September 30, 2014. Of the 3,500,000 shares authorized for the ESPP, 1,378,369 shares remain available for issuance at September 30, 2014.
	The following table sets forth the total compensation cost and related income tax benefit under the Company’s share-based compensation plans:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Compensation cost	$	1.8	$	3.2	$	4.9	$	5.9
	Related income tax benefit		0.6		1.2		1.7		2.1
	2002 Plan
	The Company has provided two types of share-based compensation pursuant to the 2002 Plan: option grants and stock award grants.
	Option Grants
	Options are granted to officers and certain non-officer employees. Options are granted with an exercise price per share equal to the closing market price of StanCorp common stock on the grant date. Options typically vest in four equal installments on the first four anniversaries of the vesting reference date.
	The Company granted options to purchase 111,810 and 164,367 shares of StanCorp common stock for the first nine months of 2014 and 2013, respectively, at a weighted-average per share exercise price of $63.69 and $38.65, respectively. The fair value of each option award granted was estimated using the Black-Scholes option pricing model as of the grant date. The weighted-average grant date fair value of options granted for the first nine months of 2014 and 2013 was $24.49 and $13.69, respectively.
	The compensation cost of stock options is recognized over the vesting period, which is also the period over which the grantee must provide services to the Company. At September 30, 2014, the total compensation cost related to unvested option awards that had not yet been recognized in the financial statements was $5.9 million. This compensation cost will be recognized over a weighted-average remaining period of 2.1 years.
	Stock Award Grants
	The Company currently grants three types of stock awards: restricted stock unit awards (“RSUs”), performance-based stock awards (“Performance Shares”) and non-employee director stock awards (“Director Stock Grants”). Under the 2002 Plan, the Company had 957,543 shares available for issuance as stock award grants at September 30, 2014.
	RSUs
	The Company grants annual RSUs to officers and senior officers of the Company. RSUs typically cliff vest three years from the grant date. The actual number of shares issued is based on continued employment with a portion of shares withheld to cover required tax withholding.
	The Company granted 47,882 and 59,823 RSUs for the first nine months of 2014 and 2013, respectively. The fair value of the RSUs is determined based on the closing market price of StanCorp common stock on the grant date.
	The compensation cost of RSUs is recognized over the vesting period, which is the period over which the grantee must provide services to the Company. At September 30, 2014, the total compensation cost related to unvested RSUs that had not yet been recognized in the financial statements was $3.3 million. This cost will be recognized over a weighted-average remaining period of 1.7 years.
	Performance Shares
	The Company grants Performance Shares to designated senior officers as long term incentive compensation. The payout for these awards is based on the Company’s financial performance over a three-year period. Performance Share grants represent the maximum number of shares of StanCorp common stock issuable to the designated senior officers if specified criteria are met. The actual number of shares issued at the end of the performance period is based on continued employment and satisfaction of the Company’s financial performance conditions, with a portion of the shares withheld to cover required tax withholding.
	The Company granted 77,634 and 117,172 Performance Shares for the first nine months of 2014 and 2013, respectively.
	The Company issued 8,846 of StanCorp common stock under previous performance share awards for the first nine months of 2014 and no shares for the first nine months of 2013.
	The fair value of Performance Shares is based on the closing market price of StanCorp common stock on the grant date.
	The compensation cost of Performance Shares is based on an estimate of the number of shares that will be earned and cost is recognized over the vesting period. The cost the Company will ultimately recognize as a result of these stock awards is dependent on the Company’s financial performance. Assuming that the maximum performance is achieved for each performance goal, $14.2 million in additional compensation cost would be recognized through 2016. Assuming that the maximum performance is achieved, this cost would be recognized over a weighted-average period of 1.1 years. The target payout is 50% of the maximum performance shares. Assuming that the target performance is achieved for each performance goal, $5.7 million in additional compensation cost would be recognized through 2016.
	Director Stock Grants
	Each non-employee director receives annual stock grants with a fair value equal to $100,000 based on the closing market price of StanCorp common stock on the day of the annual shareholder meeting. The stock grants generally vest after one year.
	The Company issued 15,697 and 20,099 shares of StanCorp common stock for the first nine months of 2014 and 2013, respectively.
	Employee Share Purchase Plan
	The Company’s ESPP allows eligible employees to purchase StanCorp common stock at a 5% discount of the lesser of the closing market price of StanCorp common stock on either the commencement date or the final date of each six-month offering period. Under the terms of the plan, each eligible employee may elect to have the lesser of up to 5% of the employee’s gross total cash compensation or $5,000 per offering period withheld to purchase StanCorp common stock. No employee may purchase StanCorp common stock having a fair market value in excess of $25,000 in any calendar year.
	The following table sets forth the compensation cost and related income tax benefit under the Company’s ESPP:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Compensation cost	$	---	$	0.1	$	0.2	$	0.3
	Related income tax benefit		---		---		0.1		0.1

Retirement_Benefits

Retirement Benefits	9 Months Ended
	Sep. 30, 2014
Retirement Benefits [Abstract]	'
Retirement Benefits	'
	4. RETIREMENT BENEFITS
	Pension Benefits
	The Company has two non-contributory defined benefit pension plans: the employee pension plan and the agent pension plan. The employee pension plan is generally limited to eligible employees of the Company whose date of employment began before 2003 and a participant is entitled to a normal retirement benefit at age 65. The agent pension plan is for former field employees and agents. The defined benefit pension plans provide benefits based on years of service and final average pay. The employee pension plan is sponsored by StanCorp and the agent pension plan is sponsored by Standard. Both plans are administered by Standard Retirement Services and are closed to new participants.
	The Company recognizes the funded status of the pension plans as an asset or liability on the balance sheet. The funded status is measured as the difference between the fair value of the plan assets and the projected benefit obligation as of the year-end balance sheet date.
	The following table sets forth the components of net periodic benefit (credit) cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for pension benefits:
								Three Months Ended						Nine Months Ended
								September 30,						September 30,
								2014			2013			2014			2013
								(In millions)
	Components of net periodic benefit (credit) cost:
			Service cost					$	2.2		$	2.6		$	6.6		$	7.7
			Interest cost						4.8			4.1			14.4			12.4
			Expected return on plan assets						-8.4			-7.4			-25.1			-22
			Amortization of prior service cost						0.2			0.2			0.5			0.5
			Amortization of net actuarial loss						0.1			2.3			0.3			7
					Net periodic benefit (credit) cost				-1.1			1.8			-3.3			5.6
	Other changes in plan assets and benefit obligation recognized
		in other comprehensive income:
			Amortization of prior service cost						-0.2			-0.2			-0.5			-0.5
			Amortization of net actuarial loss						-0.1			-2.3			-0.3			-7
					Total recognized in other comprehensive income				-0.3			-2.5			-0.8			-7.5
						Total recognized in net periodic benefit (credit) cost and
							other comprehensive income	$	-1.4		$	-0.7		$	-4.1		$	-1.9
	Postretirement Benefits Other Than Pensions
	Standard sponsors and administers a postretirement benefit plan that includes medical, prescription drug benefits and group term life insurance. Eligible retirees are required to contribute specified amounts for medical and prescription drug benefits that are determined periodically and are based on length of service and age at retirement. As of 2006, participation in the postretirement benefit plan was closed to new participants. An amendment announced in 2012 reduced future benefits for plan participants that did not retire by July 1, 2013.
	The Company recognizes the funded status of the postretirement benefit plan as an asset or liability on the balance sheet. The funded status is measured as the difference between the fair value of the plan assets and the accumulated benefit obligation.
	The following table sets forth the components of net periodic benefit cost (credit) and other amounts recognized in other comprehensive income for postretirement benefits:
							Three Months Ended						Nine Months Ended
							September 30,						September 30,
							2014			2013			2014			2013
							(In millions)
	Components of net periodic benefit cost (credit):
			Service cost				$	---		$	0.1		$	---		$	0.1
			Interest cost					0.2			0.3			0.6			0.7
			Expected return on plan assets					-0.2			-0.3			-0.6			-0.7
			Amortization of prior service cost					---			---			---			-26.4
			Amortization of net actuarial (gain) loss					---			---			-0.6			5.8
				Net periodic benefit cost (credit)				---			0.1			-0.6			-20.5
	Other changes in plan assets and benefit obligation recognized in
		other comprehensive income:
			Amortization of prior service cost					---			---			---			26.4
			Amortization of net actuarial gain (loss)					---			---			0.6			-5.8
				Total recognized in other comprehensive income				---			---			0.6			20.6
					Total recognized in net periodic benefit credit
						and other comprehensive income	$	---		$	0.1		$	---		$	0.1
	Deferred Compensation Plans
	Eligible employees are covered by a qualified deferred compensation plan sponsored by Standard under which a portion of the employee contribution is matched. Employees not eligible for the employee pension plan are eligible for an additional non-elective employer contribution. Contributions to the plan were $2.6 million and $2.3 million for the third quarters of 2014 and 2013, respectively, and $8.6 million and $7.9 million for the first nine months of 2014 and 2013, respectively.
	Eligible executive officers, directors, agents and group producers may participate in one of several non-qualified deferred compensation plans under which a portion of the deferred compensation for participating executive officers, agents and group producers is matched. The liability for these non-qualified plans was $12.4 million and $11.6 million at September 30, 2014 and December 31, 2013, respectively.
	Non-Qualified Supplemental Retirement Plan
	Eligible executive officers are covered by a non-qualified supplemental retirement plan (“non-qualified plan”). Under the non-qualified plan, a participant is entitled to a normal retirement benefit once the participant reaches age 65. A participant can also receive a normal, unreduced retirement benefit once the sum of his or her age plus years of service is at least 90. The Company recognizes the unfunded status of the non-qualified plan in other liabilities on the balance sheet. The unfunded status was $31.8 million and $31.1 million at September 30, 2014 and December 31, 2013, respectively. Expenses were $1.0 million and $0.7 million for the third quarters of 2014 and 2013, respectively and $2.9 million and $2.3 million for the first nine months of 2014 and 2013, respectively. The net loss and prior service cost, net of tax, excluded from the net periodic benefit cost and reported as a component of accumulated other comprehensive income was $5.0 million and $5.7 million at September 30, 2014 and December 31, 2013, respectively.

Segments

Segments	9 Months Ended
	Sep. 30, 2014
Segments [Abstract]	'
Segments	'
	5. SEGMENTS
	The Company collectively views and operates its businesses as Insurance Services and Asset Management. Insurance Services contains two reportable product segments, Employee Benefits and Individual Disability. Insurance Services offers group and individual disability insurance, group life and AD&D insurance, group dental and group vision insurance, and absence management services. Asset Management is a separate reportable segment. Asset Management provides investment and asset management products and services. Asset Management offers full-service 401(k) plans, 403(b) plans, 457 plans, defined benefit plans, money purchase pension plans, profit sharing plans and non-qualified deferred compensation products and services. Asset Management also offers investment advisory and management services, financial planning services, origination and servicing of fixed-rate commercial mortgage loans, individual fixed-rate annuity products, group annuity contracts and retirement plan trust products. The Other category includes return on capital not allocated to the product segments, holding company expenses, operations of certain unallocated subsidiaries, interest on debt, unallocated expenses, net capital gains and losses primarily related to the impairment or the disposition of the Company’s invested assets and adjustments made in consolidation. Resources are allocated and performance is evaluated at the segment level.
	Intersegment revenues are comprised of administrative fees charged by Asset Management to manage the fixed maturity securities—available-for-sale (“fixed maturity securities”) and commercial mortgage loan portfolios for the Company’s insurance subsidiaries. Intersegment fees are determined based on the level of assets in the insurance subsidiaries’ fixed maturity securities and commercial mortgage loan portfolios.
	The following table sets forth intersegment revenues:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
	Intersegment administrative fees	$	4.9		$	4.7		$	14.5		$	14
	The following table sets forth premiums, administrative fees and net investment income by major product line or category within each of the Company’s segments:
							Three Months Ended						Nine Months Ended
							September 30,						September 30,
							2014			2013			2014			2013
							(In millions)
	Premiums:
		Insurance Services:
			Group life and AD&D				$	202		$	210.4		$	605.1		$	640.3
			Group long term disability					187.1			191.3			565.7			589.6
			Group short term disability					55.2			56.4			167			171.9
			Group other					19.9			19.8			58.5			58.1
			Experience rated refunds					-10.3			-3.2			-15.7			-12
				Total Employee Benefits				453.9			474.7			1,380.60			1,447.90
				Individual Disability				50.3			48.3			147.3			142
					Total Insurance Services premiums			504.2			523			1,527.90			1,589.90
		Asset Management:
				Retirement plans				0.5			0.3			1.7			1.7
				Individual annuities				2.6			1.1			7			4.1
					Total Asset Management premiums			3.1			1.4			8.7			5.8
						Total premiums	$	507.3		$	524.4		$	1,536.60		$	1,595.70
	Administrative fees:
		Insurance Services:
				Employee Benefits			$	3.8		$	3.8		$	12.2		$	10.7
				Individual Disability				---			0.1			0.1			0.2
					Total Insurance Services administrative fees			3.8			3.9			12.3			10.9
		Asset Management:
				Retirement plans				25.5			23.5			74.2			69.3
				Other financial services businesses				8.4			7.8			25			23.4
					Total Asset Management administrative fees			33.9			31.3			99.2			92.7
		Other administrative fees						-4.9			-4.7			-14.5			-14
						Total administrative fees	$	32.8		$	30.5		$	97		$	89.6
	Net investment income:
		Insurance Services:
				Employee Benefits			$	60.7		$	65.8		$	185.2		$	201.4
				Individual Disability				13			13.2			39.1			39.5
					Total Insurance Services net investment income			73.7			79			224.3			240.9
		Asset Management:
				Retirement plans				28.1			26.2			83.9			75.4
				Individual annuities				37.2			43.4			116.9			131.6
				Other financial services businesses				4.1			3.8			10.3			10.4
					Total Asset Management net investment income			69.4			73.4			211.1			217.4
		Other net investment income						4			3.4			12.1			10.8
						Total net investment income	$	147.1		$	155.8		$	447.5		$	469.1
	The following tables set forth select segment information:
					Three Months Ended September 30, 2014
											Total
					Employee			Individual			Insurance			Asset
					Benefits			Disability			Services			Management			Other		Total
					(In millions)
	Revenues:
		Premiums			$	453.9		$	50.3		$	504.2		$	3.1		$	---	$	507.3
		Administrative fees				3.8			---			3.8			33.9			-4.9		32.8
		Net investment income				60.7			13			73.7			69.4			4		147.1
		Net capital losses				---			---			---			---			-5.2		-5.2
			Total revenues		518.4			63.3			581.7			106.4			-6.1		682
Benefits and expenses:
	Benefits to policyholders				321.1			34.1			355.2			5.6			---		360.8
	Interest credited				0.7			---			0.7			38			---		38.7
	Operating expenses				82.2			7.1			89.3			31.3			-0.7		119.9
	Commissions and bonuses				30.5			12.9			43.4			9.8			---		53.2
	Premium taxes				6.6			0.9			7.5			---			---		7.5
	Interest expense				---			---			---			---			7.8		7.8
	Net decrease (increase) in DAC, VOBA
		and other intangible assets			0.4			-4.1			-3.7			0.9			---		-2.8
			Total benefits and expenses		441.5			50.9			492.4			85.6			7.1		585.1
Income (loss) before income taxes				$	76.9		$	12.4		$	89.3		$	20.8		$	-13.2	$	96.9
				Three Months Ended September 30, 2013
										Total
				Employee			Individual			Insurance			Asset
				Benefits			Disability			Services			Management			Other		Total
				(In millions)
Revenues:
	Premiums			$	474.7		$	48.3		$	523		$	1.4		$	---	$	524.4
	Administrative fees				3.8			0.1			3.9			31.3			-4.7		30.5
	Net investment income				65.8			13.2			79			73.4			3.4		155.8
	Net capital losses				---			---			---			---			-8.7		-8.7
			Total revenues		544.3			61.6			605.9			106.1			-10		702
Benefits and expenses:
	Benefits to policyholders				356			35.2			391.2			3.8			---		395
	Interest credited				0.6			---			0.6			43.3			---		43.9
	Operating expenses				79			7.1			86.1			28.9			-0.2		114.8
	Commissions and bonuses				30.4			13.1			43.5			8.4			---		51.9
	Premium taxes				8.1			1			9.1			---			---		9.1
	Interest expense				---			---			---			---			8.6		8.6
	Net decrease (increase) in DAC, VOBA
		and other intangible assets			1.6			-4.5			-2.9			-0.2			---		-3.1
			Total benefits and expenses		475.7			51.9			527.6			84.2			8.4		620.2
Income (loss) before income taxes				$	68.6		$	9.7		$	78.3		$	21.9		$	-18.4	$	81.8
				Nine Months Ended September 30, 2014
										Total
				Employee			Individual			Insurance			Asset
				Benefits			Disability			Services			Management			Other		Total
				(In millions)
Revenues:
	Premiums			$	1,380.60		$	147.3		$	1,527.90		$	8.7		$	---	$	1,536.60
	Administrative fees				12.2			0.1			12.3			99.2			-14.5		97
	Net investment income				185.2			39.1			224.3			211.1			12.1		447.5
	Net capital losses				---			---			---			---			-6.8		-6.8
			Total revenues		1,578.00			186.5			1,764.50			319			-9.2		2,074.30
Benefits and expenses:
	Benefits to policyholders				1,073.70			98.9			1,172.60			15.5			---		1,188.10
	Interest credited				2.6			---			2.6			120.2			---		122.8
	Operating expenses				238.3			20.7			259			91.3			-2		348.3
	Commissions and bonuses				93.5			35.6			129.1			25.6			---		154.7
	Premium taxes				22			2.7			24.7			---			---		24.7
	Interest expense				---			---			---			---			24.1		24.1
	Net (increase) decrease in DAC, VOBA
		and other intangible assets			-0.3			-8.9			-9.2			7.2			---		-2
			Total benefits and expenses		1,429.80			149			1,578.80			259.8			22.1		1,860.70
Income (loss) before income taxes				$	148.2		$	37.5		$	185.7		$	59.2		$	-31.3	$	213.6
Total assets				$	5,740.00		$	2,349.80		$	8,089.80		$	13,775.60		$	573.3	$	22,438.70
				Nine Months Ended September 30, 2013
										Total
				Employee			Individual			Insurance			Asset
				Benefits			Disability			Services			Management			Other		Total
				(In millions)
Revenues:
	Premiums			$	1,447.90		$	142		$	1,589.90		$	5.8		$	---	$	1,595.70
	Administrative fees				10.7			0.2			10.9			92.7			-14		89.6
	Net investment income				201.4			39.5			240.9			217.4			10.8		469.1
	Net capital losses				---			---			---			---			-12.9		-12.9
			Total revenues		1,660.00			181.7			1,841.70			315.9			-16.1		2,141.50
Benefits and expenses:
	Benefits to policyholders				1,153.10			93.9			1,247.00			13.9			---		1,260.90
	Interest credited				2.8			---			2.8			128			---		130.8
	Operating expenses				232.8			19.7			252.5			85.9			-14.1		324.3
	Commissions and bonuses				96.5			35.4			131.9			24.6			---		156.5
	Premium taxes				24.7			3			27.7			---			---		27.7
	Interest expense				---			---			---			---			25.7		25.7
	Net decrease (increase) in DAC, VOBA
		and other intangible assets			0.9			-9.6			-8.7			3.7			---		-5
			Total benefits and expenses		1,510.80			142.4			1,653.20			256.1			11.6		1,920.90
Income (loss) before income taxes				$	149.2		$	39.3		$	188.5		$	59.8		$	-27.7	$	220.6
Total assets				$	5,805.00		$	2,369.50		$	8,174.50		$	12,224.70		$	527.1	$	20,926.30

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Abstract	'
Fair Value	'
	6. FAIR VALUE
	Assets and liabilities recorded at fair value are disclosed using a three-level hierarchy. The classification of assets and liabilities within the hierarchy is based on whether the inputs to the valuation methodology used for measurement are observable or unobservable. Observable inputs reflect market-derived or market-based information obtained from independent sources while unobservable inputs reflect the Company’s estimates about market data.
	The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels: Level 1 inputs are based upon quoted prices in active markets for identical assets or liabilities that the Company can access at the measurement date. Level 2 inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 inputs are generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s estimates of assumptions that market participants would use in pricing the asset or liability.
	There are three types of valuation techniques used to measure assets and liabilities recorded at fair value:
	The market approach uses prices or other relevant information generated by market transactions involving identical or comparable assets or liabilities.
	The income approach uses the present value of cash flows or earnings.
	The cost approach, which uses replacement costs more readily adaptable for valuing physical assets.
	The Company uses both the market and income approach in its fair value measurements. These measurements are discussed in more detail below.
	The following tables set forth the carrying value and the estimated fair value of each financial instrument:
							30-Sep-14
							Carrying			Fair
							Value			Value			Level 1		Level 2		Level 3
							(In millions)
	Assets:
		Fixed maturity securities:
			Corporate bonds				$	7,149.90		$	7,149.90		$	---	$	7,068.40	$	81.5
			U.S. government and agency bonds					303.2			303.2			---		303.2		---
			U.S. state and political subdivision bonds					136.5			136.5			---		136.5		---
			Foreign government bonds					65			65			---		65		---
				Total fixed maturity securities			$	7,654.60		$	7,654.60		$	---	$	7,573.10	$	81.5
		Commercial mortgage loans, net					$	5,342.60		$	5,822.30		$	---	$	---	$	5,822.30
		S&P 500 Index options						12.8			12.8			---		---		12.8
		Interest rate swaps						0.7			0.7			---		0.7		---
		Policy loans						2.2			2.2			---		---		2.2
		Separate account assets						7,031.90			7,031.90			6,907.00		124.9		---
	Liabilities:
		Total other policyholder funds,
			investment-type contracts				$	5,694.50		$	5,957.90		$	---	$	---	$	5,957.90
		Index-based interest guarantees						69.4			69.4			---		---		69.4
		Short-term debt						1.2			1.6			---		1.6		---
		Long-term debt						503.7			537.2			---		537.2		---
							31-Dec-13
							Carrying			Fair
							Value			Value			Level 1		Level 2		Level 3
							(In millions)
	Assets:
		Fixed maturity securities:
			Corporate bonds				$	6,545.70		$	6,545.70		$	---	$	6,429.70	$	116
			U.S. government and agency bonds					353.2			353.2			---		353.2		---
			U.S. state and political subdivision bonds					140.3			140.3			---		140.3		---
			Foreign government bonds					65.5			65.5			---		65.5		---
			S&P 500 Index options					15.8			15.8			---		---		15.8
				Total fixed maturity securities			$	7,120.50		$	7,120.50		$	---	$	6,988.70	$	131.8
		Commercial mortgage loans, net					$	5,405.10		$	5,769.60		$	---	$	---	$	5,769.60
		Policy loans						2.5			2.5			---		---		2.5
		Separate account assets						6,393.20			6,393.20			6,249.20		144		---
	Liabilities:
		Other policyholder funds,
			investment-type contracts				$	5,469.80		$	5,632.70		$	---	$	---	$	5,632.70
		Index-based interest guarantees						67.6			67.6			---		---		67.6
		Short-term debt						1.5			1.9			---		1.9		---
		Long-term debt						551.9			553.6			---		553.6		---
	Financial Instruments Not Recorded at Fair Value
	The Company did not elect to measure and record commercial mortgage loans, policy loans, other policyholders funds that are investment-type contracts, short-term debt, or long-term debt at fair value on the unaudited condensed consolidated balance sheets.
	For disclosure purposes, the fair values of commercial mortgage loans were estimated using an option-adjusted discounted cash flow valuation. The valuation includes both observable market inputs and estimated model parameters.
	Significant observable inputs to the valuation include:
	Indicative quarter-end pricing for a package of loans similar to those originated by the Company near quarter-end.
	U.S. Government treasury yields.
	Indicative yields from industrial bond issues.
	The contractual terms of nearly every mortgage subject to valuation.
	Significant estimated parameters include:
	A liquidity premium that is estimated from historical loan sales and is applied over and above base yields.
	Adjustments in interest rate spread based on an aggregate portfolio loan-to-value ratio, estimated from historical differential yields with respect to loan-to-value ratios.
Projected prepayment activity.
For policy loans, the carrying value represents historical cost but approximates fair value. While potentially financial instruments, policy loans are an integral component of the insurance contract and have no maturity date.
The fair value of other policyholder funds that are investment-type contracts was calculated using the income approach in conjunction with the cost of capital method. The parameters used for discounting in the calculation were estimated using the perspective of the principal market for the contracts under consideration. The principal market consists of other insurance carriers with similar contracts on their books.
The fair value for long-term debt was predominantly based on quoted market prices as of September 30, 2014 and December 31, 2013, and trades occurring close to September 30, 2014 and December 31, 2013.
Financial Instruments Measured and Recorded at Fair Value
Fixed maturity securities, Standard & Poor’s (“S&P”) 500 Index options (“S&P 500 Index options”), interest rate swaps and index-based interest guarantees embedded in indexed annuities (“index-based interest guarantees”) are recorded at fair value on a recurring basis. In the Company’s unaudited condensed consolidated statements of comprehensive income (loss), unrealized gains and losses are reported in other comprehensive income for fixed maturity securities. In the Company’s unaudited condensed consolidated statements of income, the change in fair value for S&P 500 Index options is reported in net investment income. For interest rate swaps that are designated as a fair value hedge, the change in the fair values of the interest rate swap and the hedged item are reported in net capital gains and losses. The change in fair value for index-based interest guarantees is reported in interest credited.
Separate account assets represent segregated funds held for the exclusive benefit of contract holders. The activities of the account primarily relate to participant-directed 401(k) contracts. Separate account assets are recorded at fair value on a recurring basis, with changes in fair value recorded to separate account liabilities. Separate account assets consist of mutual funds. The mutual funds’ fair value is determined through Level 1 and Level 2 inputs. The majority of the separate account assets are valued using quoted prices in an active market with the remainder of the assets valued using quoted prices from an independent pricing service. The Company reviews the values obtained from the pricing service for reasonableness through analytical procedures and performance reviews.
Fixed maturity securities are comprised of the following classes:
Corporate bonds.
U.S. government and agency bonds.
U.S. state and political subdivision bonds.
Foreign government bonds.
The fixed maturity securities are diversified across industries, issuers and maturities. The Company calculates fair values for all classes of fixed maturity securities using valuation techniques described below. They are placed into three levels depending on the valuation technique used to determine the fair value of the securities.
The Company uses an independent pricing service to assist management in determining the fair value of these assets. The pricing service incorporates a variety of information observable in the market in its valuation techniques, including:
Reported trading prices.
Benchmark yields.
Broker-dealer quotes.
Benchmark securities.
Bids and offers.
Credit ratings.
Relative credit information.
Other reference data.
The pricing service also takes into account perceived market movements and sector news, as well as a bond’s terms and conditions, including any features specific to that issue that may influence risk, and thus marketability. Depending on the security, the priority of the use of observable market inputs may change as some observable market inputs may not be relevant or additional inputs may be necessary. The Company generally obtains one value from its primary external pricing service. On a case-by-case basis, the Company may obtain further quotes or prices from additional parties as needed.
The pricing service provides quoted market prices when available. Quoted prices are not always available due to bond market inactivity. The pricing service obtains a broker quote when sufficient information, such as security structure or other market information, is not available to produce a valuation. Valuations and quotes obtained from third-party commercial pricing services are non-binding and do not represent quotes on which one may execute the disposition of the assets.
The significant unobservable inputs used in the fair value measurement of the reporting entity’s bonds are valuations and quotes received from secondary pricing service, analytical reviews and broker quotes. Significant increases or decreases in any of those inputs in isolation would result in a significantly lower or higher fair value measurement. Generally, a change in the assumption used for the pricing evaluation is accompanied by a directionally similar change in the assumption used for the methodologies.
The Company performs control procedures over the external valuations at least quarterly through a combination of procedures that include an evaluation of methodologies used by the pricing service, analytical reviews and performance analysis of the prices against statistics, trends and secondary pricing sources, back testing of sales activity and maintenance of a securities watch list. As necessary, the Company compares prices received from the pricing service to prices independently estimated by the Company utilizing discounted cash flow models or through performing independent valuations of inputs and assumptions similar to those used by the pricing service in order to ensure prices represent a reasonable estimate of fair value. Although the Company does identify differences from time to time as a result of these validation procedures, the Company did not make any significant adjustments as of September 30, 2014 or December 31, 2013.
S&P 500 Index options and certain fixed maturity securities were valued using Level 3 inputs. The Level 3 fixed maturity securities were valued using matrix pricing, independent broker quotes and other standard market valuation methodologies. The fair value was determined using inputs that were not observable or could not be derived principally from, or corroborated by, observable market data. These inputs included assumptions regarding liquidity, estimated future cash flows and discount rates. Unobservable inputs to these valuations are based on management’s judgment or estimation obtained from the best sources available. The Company’s valuations maximize the use of observable inputs, which include an analysis of securities in similar sectors with comparable maturity dates and bond ratings. Broker quotes are validated by management for reasonableness in conjunction with information obtained from matrix pricing and other sources.
The Company calculates the fair value for its S&P 500 Index options using the Black-Scholes option pricing model and parameters derived from market sources. The Company’s valuations maximize the use of observable inputs, which include direct price quotes from the Chicago Board Options Exchange (“CBOE”) and values for on-the-run treasury securities and London Interbank Offered Rate (“LIBOR”) as reported by Bloomberg. Unobservable inputs are estimated from the best sources available to the Company and include estimates of future gross dividends to be paid on the stocks underlying the S&P 500 Index, estimates of bid ask spreads, and estimates of implied volatilities on options. Valuation parameters are calibrated to replicate the actual end-of-day market quotes for options trading on the CBOE. The Company performs additional validation procedures such as the daily observation of market activity and conditions and the tracking and analyzing of actual quotes provided by banking counterparties each time the Company purchases options from them. Additionally, in order to help validate the values derived through the procedures noted above, the Company obtains indicators of value from representative investment banks.
The Company uses the discounted cash flow valuation model to determine the fair value of the interest rate swaps. The inputs used in the model are observable in the market. The interest rate swaps qualify as Level 2 under the fair value hierarchy since their valuation is based off a model for which all significant assumptions are observable in the market.
The Company uses the income approach valuation technique to determine the fair value of index-based interest guarantees. The liability is the present value of future cash flows attributable to the projected index growth in excess of cash flows driven by fixed interest rate guarantees for the indexed annuity product. Level 3 assumptions for policyholder behavior and future index crediting rate declarations significantly influence the calculation. Index-based interest guarantees are included in the other policyholder funds line on the Company’s unaudited condensed consolidated balance sheets.
While valuations for the S&P 500 Index options are sensitive to a number of variables, valuations for S&P 500 Index options purchased are most sensitive to changes in the estimates of bid ask spreads, or the S&P 500 Index value, and the implied volatilities of this index. Significant fluctuations in any of those inputs in isolation would result in a significantly lower or higher fair value measurement. Generally, an increase or decrease used in the assumption for the implied volatilities and in the S&P 500 Index value would result in a directionally similar change in the fair value of the asset.
Valuations for the index-based interest guarantees are sensitive to a number of variables, but are most sensitive to the S&P 500 Index value, the implied volatilities of this index and the interest rate environment. Generally, a significant increase or decrease used in the assumption for the implied volatilities and in the S&P 500 Index value would result in a directionally similar change, while an increase or decrease in interest rate environment would result in a directionally opposite change in the fair value of the liability.
Valuations for commercial mortgage loans measured at fair value on a nonrecurring basis using significant unobservable Level 3 inputs are sensitive to a number of variables, but are most sensitive to net operating income and the applied capitalization rate. Generally, an increase or decrease resulting from a change in the stabilized net operating income from the collateralized property would result in a directionally similar change in the fair value of the asset. An increase or decrease in the assumption for the capitalization rate would result in a directionally opposite change in the fair value of the asset.
Valuations for real estate acquired in satisfaction of debt through foreclosure or acceptance of deeds in lieu of foreclosure on commercial mortgage loans (“Real Estate Owned”) measured at fair value on a nonrecurring basis using significant unobservable Level 3 inputs are sensitive to a number of variables. Real Estate Owned is most sensitive to the reductions taken on appraisals obtained, which may result in a fair value and carrying value below the appraised value. Generally, an increase in the reductions taken on appraisals obtained would result in a reduction in the fair value of the asset.
The following table sets forth quantitative information regarding significant unobservable inputs used in Level 3 valuations of assets and liabilities measured and recorded at fair value:
							30-Sep-14					31-Dec-13
							Fair			Range		Fair		Range
			Valuation Technique		Unobservable Input		Value			of inputs		Value		of inputs
			(Dollars in millions)
S&P 500 Index options			Black-Scholes option pricing model		Various assumptions		$	12.8		(a)		$	15.8	(a)
Index-based interest			Discounted cash		Expected future		$	69.4		1% - 3%		$	67.6	1% - 6%
	guarantees		flow		option purchase
					Various assumptions					(b)				(b)
			Black-Scholes option pricing model		Various assumptions					(a)				(a)
Commercial mortgage loans			Appraisals		Reduction on appraisal		$	58.5		0% - 40%		$	68.7	0% - 13%
			Cash flows		Capitalization rate (c)					7% - 16%				7% - 16%
Real Estate Owned			Appraisals		Reduction on appraisal		$	13.9		0% - 11%		$	35.2	0% - 53%
Represents various assumptions derived from market data, which include estimates of bid ask spreads and the implied volatilities for the S&P 500 Index.
Represents various actuarial assumptions which include combined lapse, mortality and withdrawal decrement rates which generally have a range of inputs from 5%-36% for both September 30, 2014 and December 31, 2013.
Capitalization rates are used as an internal analysis in converting the underlying property income to an estimated property value.
The following tables set forth the reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable Level 3 inputs:
			Three Months Ended September 30, 2014
			Assets													Liabilities
			U.S.			U.S. State										Index-
			Government			and Political						S&P 500				Based
			and Agency			Subdivision			Corporate			Index		Total		Interest
			Bonds			Bonds			Bonds			Options		Assets		Guarantees
			(In millions)
Beginning balance			$	---		$	---		$	83.3		$	14.4	$	97.7	$	68.3
Total realized/unrealized gains (losses):
	Included in net income			---			---			---			0.9		0.9		-0.5
	Included in other comprehensive income (loss)			---			---			-1.8			---		-1.8		---
Purchases, issuances, sales and settlements:
	Purchases			---			---			---			2.2		2.2		---
	Issuances			---			---			---			---		---		3.4
	Sales			---			---			---			---		---		---
	Settlements			---			---			---			-4.7		-4.7		-1.8
Transfers into level 3				---			---			---			---		---		---
Transfers out of level 3				---			---			---			---		---		---
Ending balance			$	---		$	---		$	81.5		$	12.8	$	94.3	$	69.4
			Three Months Ended September 30, 2013
			Assets													Liabilities
			U.S.			U.S. State										Index-
			Government			and Political						S&P 500				Based
			and Agency			Subdivision			Corporate			Index		Total		Interest
			Bonds			Bonds			Bonds			Options		Assets		Guarantees
			(In millions)
Beginning balance			$	---		$	---		$	51.9		$	13.7	$	65.6	$	62.6
Total realized/unrealized gains (losses):
	Included in net income			---			---			---			2.5		2.5		1.6
	Included in other comprehensive income (loss)			---			---			12.3			---		12.3		---
Purchases, issuances, sales and settlements:
	Purchases			---			---			---			2.2		2.2		---
	Issuances			---			---			---			---		---		1.4
	Sales			---			---			---			---		---		---
	Settlements			---			---			---			-4.3		-4.3		-0.9
Transfers into level 3				---			---			1.3			---		1.3		---
Transfers out of level 3				---			---			-0.3			---		-0.3		---
Ending balance			$	---		$	---		$	65.2		$	14.1	$	79.3	$	64.7
			Nine Months Ended September 30, 2014
			Assets													Liabilities
			U.S.			U.S. State										Index-
			Government			and Political						S&P 500				Based
			and Agency			Subdivision			Corporate			Index		Total		Interest
			Bonds			Bonds			Bonds			Options		Assets		Guarantees
			(In millions)
Beginning balance			$	---		$	---		$	116		$	15.8	$	131.8	$	67.6
Total realized/unrealized gains (losses):
	Included in net income			---			---			---			5.3		5.3		3.5
	Included in other comprehensive income (loss)			---			---			-3.9			---		-3.9		---
Purchases, issuances, sales and settlements:
	Purchases			---			---			---			6.3		6.3		---
	Issuances			---			---			---			---		---		5.2
	Sales			---			---			---			---		---		---
	Settlements			---			---			---			-14.6		-14.6		-6.9
Transfers into Level 3				---			---			---			---		---		---
Transfers out of Level 3				---			---			-30.6			---		-30.6		---
Ending balance			$	---		$	---		$	81.5		$	12.8	$	94.3	$	69.4
			Nine Months Ended September 30, 2013
			Assets													Liabilities
			U.S.			U.S. State										Index-
			Government			and Political						S&P 500				Based
			and Agency			Subdivision			Corporate			Index		Total		Interest
			Bonds			Bonds			Bonds			Options		Assets		Guarantees
			(In millions)
Beginning balance			$	1.1		$	1.7		$	80.4		$	11.3	$	94.5	$	57.4
Total realized/unrealized gains (losses):
	Included in net income			---			---			---			9.7		9.7		6.1
	Included in other comprehensive income (loss)			---			---			7.2			---		7.2		---
Purchases, issuances, sales and settlements:
	Purchases			---			---			---			6.8		6.8		---
	Issuances			---			---			---			---		---		4.3
	Sales			---			---			---			---		---		---
	Settlements			---			---			---			-13.7		-13.7		-3.1
Transfers into Level 3				---			---			8.3			---		8.3		---
Transfers out of Level 3				-1.1			-1.7			-30.7			---		-33.5		---
Ending balance			$	---		$	---		$	65.2		$	14.1	$	79.3	$	64.7
For all periods disclosed above, fixed maturity securities transferred into Level 3 from Level 2 are the result of the Company being unable to obtain observable assumptions for these investments in the market. Fixed maturity securities transferred out of Level 3 into Level 2 are the result of the Company being able to obtain observable assumptions for these investments in the market. There were no transfers between Level 1 and Level 2 for the third quarters and first nine months of 2014 and 2013.
The following table sets forth the changes in unrealized gains (losses) included in net income relating to Level 3 assets and liabilities that the Company continued to hold:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
Assets:
	S&P 500 Index options	$	0.7		$	0.3		$	3.3		$	4.5
Liabilities:
	Index-based interest guarantees		-0.8			-2			-7.9			-7.3
Changes in the fair value of fixed maturity securities are recorded to other comprehensive income. Changes in the fair value of the S&P 500 Index options are recorded to net investment income. Changes in the fair value of the index-based interest guarantees are recorded to interest credited and are sensitive to a number of variables and assumptions. As a result of the Company’s annual update of the key assumptions used to value index-based interest guarantees, a process known as “unlocking”, interest credited decreased $1.4 million and increased $1.3 million for the third quarters of 2014 and 2013, respectively, and decreased $2.7 million and increased $2.7 million for the first nine months of 2014 and 2013 respectively.
Certain assets and liabilities are measured at fair value on a nonrecurring basis, such as impaired commercial mortgage loans with specific allowances for losses and Real Estate Owned. The impaired commercial mortgage loans and Real Estate Owned are valued using Level 3 measurements. These Level 3 inputs are reviewed for reasonableness by management and evaluated on a quarterly basis. The commercial mortgage loan measurements include valuation of the market value of the asset using general underwriting procedures and appraisals. Real Estate Owned is initially recorded at net realizable value, which includes an estimate for disposal costs. These amounts may be adjusted in a subsequent period as additional information is received.
The following table sets forth the assets measured at fair value on a nonrecurring basis as of September 30, 2014 that the Company continued to hold:
		30-Sep-14
		Total			Level 1			Level 2			Level 3
		(In millions)
Commercial mortgage loans		$	58.5		$	---		$	---		$	58.5
Real Estate Owned			13.9			---			---			13.9
	Total assets measured at fair value on a nonrecurring basis	$	72.4		$	---		$	---		$	72.4
Commercial mortgage loans measured on a nonrecurring basis with a carrying amount of $77.3 million were written down to their fair value of $58.5 million, less selling costs, at September 30, 2014. The specific commercial mortgage loan loss allowance related to these commercial mortgage loans was $24.6 million at September 30, 2014. The Real Estate Owned measured on a nonrecurring basis as of September 30, 2014, and still held at September 30, 2014 had net capital losses totaling $1.3 million for the first nine months of 2014. Real Estate Owned measured on a nonrecurring basis represents newly acquired properties or properties whose value has been adjusted based on pending sale or other market information.
The following table sets forth the assets measured at fair value on a nonrecurring basis as of December 31, 2013 that the Company continued to hold:
		31-Dec-13
		Total			Level 1			Level 2			Level 3
		(In millions)
Commercial mortgage loans		$	68.7		$	---		$	---		$	68.7
Real Estate Owned			35.2			---			---			35.2
	Total assets measured at fair value on a nonrecurring basis	$	103.9		$	---		$	---		$	103.9
Commercial mortgage loans measured on a nonrecurring basis with a carrying amount of $87.7 million were written down to their fair value of $68.7 million, less selling costs, at December 31, 2013. The specific commercial mortgage loan loss allowance related to these commercial mortgage loans was $25.9 million at December 31, 2013. The Real Estate Owned measured on a nonrecurring basis as of December 31, 2013, and still held at December 31, 2013 had capital losses totaling $7.2 million for 2013. See “Note 7—Investments—Commercial Mortgage Loans” for further disclosures regarding the commercial mortgage loan loss allowance.

Investments

Investments	9 Months Ended
	Sep. 30, 2014
Investments [Abstract]	'
Investments	'
	7. INVESTMENTS
	Fixed Maturity Securities
	The following tables set forth amortized costs, gross unrealized gains and losses and fair values of the Company’s fixed maturity securities:
			30-Sep-14
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
			(In millions)
	Corporate bonds		$	6,815.70		$	368.2		$	-34		$	7,149.90
	U.S. government and agency bonds			267.6			35.8			-0.2			303.2
	U.S. state and political subdivision bonds			126.6			10.1			-0.2			136.5
	Foreign government bonds			58.5			6.5			---			65
		Total fixed maturity securities	$	7,268.40		$	420.6		$	-34.4		$	7,654.60
			31-Dec-13
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
			(In millions)
	Corporate bonds		$	6,282.10		$	339.6		$	-76		$	6,545.70
	U.S. government and agency bonds			320.8			32.8			-0.4			353.2
	U.S. state and political subdivision bonds			134.3			6.8			-0.8			140.3
	Foreign government bonds			58.9			6.6			---			65.5
	S&P 500 Index options			15.8			---			---			15.8
		Total fixed maturity securities	$	6,811.90		$	385.8		$	-77.2		$	7,120.50
	The following table sets forth the amortized costs and fair values of the Company’s fixed maturity securities by contractual maturity:
			30-Sep-14						31-Dec-13
			Amortized			Fair			Amortized			Fair
			Cost			Value			Cost			Value
			(In millions)
	Due in one year or less		$	637		$	646.8		$	486.2		$	495.1
	Due after one year through five years			3,150.70			3,326.40			2,974.50			3,168.90
	Due after five years through ten years			2,633.10			2,702.30			2,497.50			2,524.60
	Due after ten years			847.6			979.1			853.7			931.9
		Total fixed maturity securities	$	7,268.40		$	7,654.60		$	6,811.90		$	7,120.50
	Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations. Callable bonds, excluding bonds with make-whole provisions and bonds with provisions that allow the borrower to prepay near maturity, represented 3.7%, or $280.1 million, of the Company’s fixed maturity securities portfolio at September 30, 2014. At September 30, 2014, the Company did not have any direct exposure to sub-prime or Alt-A mortgages in its fixed maturity securities portfolio.
	Gross Unrealized Losses
	The following tables set forth the gross unrealized losses and fair value of investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:
					30-Sep-14
					Total						Less than 12 months						12 or more months
					Number			Amount			Number			Amount			Number			Amount
					(Dollars in millions)
	Unrealized losses:
			Corporate bonds			964		$	34			632		$	12.2			332		$	21.8
			U.S. government and agency bonds			7			0.2			2			0.1			5			0.1
			U.S. state and political subdivision bonds			4			0.2			---			---			4			0.2
				Total		975		$	34.4			634		$	12.3			341		$	22.1
	Fair value of securities with unrealized losses:
			Corporate bonds			964		$	1,734.80			632		$	1,118.20			332		$	616.6
			U.S. government and agency bonds			7			12.1			2			5.5			5			6.6
			U.S. state and political subdivision bonds			4			6.8			---			---			4			6.8
				Total		975		$	1,753.70			634		$	1,123.70			341		$	630
					31-Dec-13
					Total						Less than 12 months						12 or more months
					Number			Amount			Number			Amount			Number			Amount
					(Dollars in millions)
	Unrealized losses:
			Corporate bonds			908		$	76			848		$	66.3			60		$	9.7
			U.S. government and agency bonds			9			0.4			9			0.4			---			---
			U.S. state and political subdivision bonds			10			0.8			10			0.8			---			---
				Total		927		$	77.2			867		$	67.5			60		$	9.7
	Fair value of securities with unrealized losses:
			Corporate bonds			908		$	1,663.80			848		$	1,557.70			60		$	106.1
			U.S. government and agency bonds			9			16.9			9			16.9			---			---
			U.S. state and political subdivision bonds			10			15.4			10			15.4			---			---
				Total		927		$	1,696.10			867		$	1,590.00			60		$	106.1
The unrealized losses on the fixed maturity securities set forth above were partly due to increases in market interest rates subsequent to their purchase by the Company and have also been affected by overall economic factors. The Company expects the fair value of these fixed maturity securities to recover as the fixed maturity securities approach their maturity dates or sooner if market yields for such fixed maturity securities decline. The Company does not believe that any of the fixed maturity securities are impaired due to credit quality or due to any company or industry specific event. Based on management’s evaluation of the securities and the Company’s intent to hold the securities, and as it is unlikely that the Company will be required to sell the securities, none of the unrealized losses summarized in this table are considered other-than-temporary.
Commercial Mortgage Loans
The Company underwrites mortgage loans on commercial property throughout the United States. In addition to real estate collateral, the Company requires either partial or full recourse on most loans. At September 30, 2014, the Company did not have any direct exposure to sub-prime or Alt-A mortgages in its commercial mortgage loan portfolio.
The following table sets forth the commercial mortgage loan portfolio by property type, by geographic region within the U.S. and by U.S. state:
			30-Sep-14						31-Dec-13
			Amount			Percent			Amount			Percent
			(Dollars in millions)
Property type:
	Retail		$	2,645.00		49.5	%		$	2,629.20		48.6	%
	Industrial			1,005.90		18.8				1,008.70		18.7
	Office			997.9		18.7				982.4		18.2
	Apartment and other			302		5.6				289.9		5.4
	Hotel/motel			175.1		3.3				276.3		5.1
	Commercial			216.7		4.1				218.6		4
		Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
Geographic region*:
	Pacific		$	1,915.60		35.9	%		$	1,910.10		35.3	%
	South Atlantic			1,063.20		19.9				1,090.00		20.2
	West South Central			674		12.6				672.8		12.4
	Mountain			599.1		11.2				611.4		11.3
	East North Central			474.8		8.9				473.8		8.8
	Middle Atlantic			223.4		4.2				223		4.1
	West North Central			149.8		2.8				186.9		3.5
	East South Central			184.6		3.4				166.6		3.1
	New England			58.1		1.1				70.5		1.3
		Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
U.S. state:
	California		$	1,443.10		27	%		$	1,455.50		26.9	%
	Texas			620.2		11.6				618.8		11.5
	Florida			315.4		5.9				331.6		6.1
	Georgia			308.1		5.8				310.7		5.8
	Other states			2,655.80		49.7				2,688.50		49.7
		Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
* Geographic regions obtained from the American Council of Life Insurers Mortgage Loan Portfolio Profile.
Due to the concentration of commercial mortgage loans in California, the Company could be exposed to potential losses as a result of an economic downturn in California as well as certain catastrophes, such as earthquakes and fires, which may affect the region.
The carrying value of commercial mortgage loans represents the outstanding principal balance less a loan loss allowance for probable uncollectible amounts. The commercial mortgage loan loss allowance is estimated based on evaluating known and inherent risks in the loan portfolio and consists of a general and a specific loan loss allowance.
Impairment Evaluation
The Company monitors its commercial mortgage loan portfolio for potential impairment by evaluating the portfolio and individual loans. Key factors that are monitored include:
Loan loss experience.
Delinquency history.
Debt coverage ratio.
Loan to value ratio.
Refinancing and restructuring history.
Request for payment forbearance history.
If the analysis above indicates a loan might be impaired, it is further analyzed through the consideration of the following additional factors:
Delinquency status.
Foreclosure status.
Restructuring status.
Borrower history.
If it is determined a loan is impaired, a specific loan loss allowance is recorded.
General Loan Loss Allowance
The general loan loss allowance is based on the Company’s analysis of factors including changes in the size and composition of the loan portfolio, debt coverage ratios, loan to value ratios, actual loan loss experience and individual loan analysis.
Specific Loan Loss Allowance
An impaired commercial mortgage loan is a loan where the Company does not expect to receive contractual principal and interest in accordance with the terms of the original loan agreement. A specific allowance for losses is recorded when a loan is considered to be impaired and it is probable that all amounts due will not be collected based on the terms of the original note. The Company also holds specific loan loss allowances on certain performing commercial mortgage loans that it continues to monitor and evaluate. Impaired commercial mortgage loans without specific allowances for losses are those for which the Company has determined that it remains probable that all amounts due will be collected although the timing or nature may be outside the original contractual terms. In addition, for impaired commercial mortgage loans, the Company evaluates the cost to dispose of the underlying collateral, any significant out of pocket expenses the loan may incur and other quantitative information management has concerning the loan. Portions of loans that are deemed uncollectible are written off against the allowance, and recoveries, if any, are credited to the allowance.
The following table sets forth changes in the commercial mortgage loan loss allowance:
				Three Months Ended						Nine Months Ended
				September 30,						September 30,
				2014			2013			2014			2013
				(In millions)
Commercial mortgage loan loss allowance:
	Beginning balance			$	44.4		$	46.8		$	43.6		$	46.6
		Provision			5.9			3.8			8.1			12.8
		Charge-offs			-8.8			-4			-10.2			-12.8
			Ending balance	$	41.5		$	46.6		$	41.5		$	46.6
	Specific loan loss allowance			$	24.6		$	28.2		$	24.6		$	28.2
	General loan loss allowance				16.9			18.4			16.9			18.4
			Total commercial mortgage loan loss allowance	$	41.5		$	46.6		$	41.5		$	46.6
The decrease in the commercial mortgage loan loss allowance at September 30, 2014 compared to September 30, 2013 was primarily due to fewer commercial mortgage loans with a specific loan loss allowance. The increase in charge-offs for the third quarter of 2014 compared to the third quarter of 2013 was primarily due to higher losses related to foreclosures, accepted deeds in lieu of foreclosures and other related charges associated with the commercial mortgage loan portfolio. The decrease in charge-offs for the first nine months of 2014 compared to the first nine months of 2013 was primarily due to lower losses related to foreclosures, accepted deeds in lieu of foreclosure and other related charges associated with the commercial mortgage loan portfolio.
The following table sets forth the recorded investment in commercial mortgage loans:
		30-Sep-14			31-Dec-13
		(In millions)
Commercial mortgage loans collectively evaluated for impairment		$	5,285.50		$	5,334.40
Commercial mortgage loans individually evaluated for impairment			98.6			114.3
Commercial mortgage loan loss allowance			-41.5			-43.6
	Total commercial mortgage loans, net	$	5,342.60		$	5,405.10
The Company assesses the credit quality of its commercial mortgage loan portfolio quarterly by reviewing the performance of its portfolio, which includes evaluating its performing and nonperforming commercial mortgage loans. Nonperforming commercial mortgage loans include all commercial mortgage loans that are 60 days or more past due and commercial mortgage loans that are not 60 days past due but are not substantially performing to other original contractual terms.
The following tables set forth performing and nonperforming commercial mortgage loans by property type:
		30-Sep-14
											Apartment			Hotel/
		Retail			Industrial			Office			and Other			Motel			Commercial			Total
		(In millions)
Performing commercial mortgage loans		$	2,639.80		$	1,005.10		$	995.4		$	302		$	175.1		$	216.7		$	5,334.10
Nonperforming commercial mortgage loans			5.2			0.8			2.5			---			---			---			8.5
	Total commercial mortgage loans	$	2,645.00		$	1,005.90		$	997.9		$	302		$	175.1		$	216.7		$	5,342.60
		31-Dec-13
											Apartment			Hotel/
		Retail			Industrial			Office			and Other			Motel			Commercial			Total
		(In millions)
Performing commercial mortgage loans		$	2,624.20		$	1,004.60		$	979.6		$	289.9		$	276.3		$	218.6		$	5,393.20
Nonperforming commercial mortgage loans			5			4.1			2.8			---			---			---			11.9
	Total commercial mortgage loans	$	2,629.20		$	1,008.70		$	982.4		$	289.9		$	276.3		$	218.6		$	5,405.10
The following tables set forth impaired commercial mortgage loans identified in management’s specific review of probable loan losses and the related allowance:
						30-Sep-14
									Unpaid						Amount on
						Recorded			Principal			Related			Nonaccrual
						Investment			Balance			Allowance			Status
						(In millions)
Impaired commercial mortgage loans:
	Without specific loan loss allowances:
		Retail				$	12.8		$	12.8		$	---		$	1.8
		Office					3			3			---			1.5
		Industrial					0.9			0.9			---			---
		Commercial					1.8			1.8			---			---
		Apartment and other					2.8			2.8			---			---
			Total impaired commercial mortgage loans without specific
				loan loss allowances			21.3			21.3			---			3.3
	With specific loan loss allowances:
		Retail					54.5			54.5			13.2			6.1
		Office					9.6			9.6			3.2			1
		Industrial					5			5			2.4			0.1
		Commercial					7.9			7.9			5.8			1
		Apartment and other					0.3			0.3			---			---
			Total impaired commercial mortgage loans with specific
				loan loss allowances			77.3			77.3			24.6			8.2
					Total impaired commercial mortgage loans	$	98.6		$	98.6		$	24.6		$	11.5
						31-Dec-13
									Unpaid						Amount on
						Recorded			Principal			Related			Nonaccrual
						Investment			Balance			Allowance			Status
						(In millions)
Impaired commercial mortgage loans:
	Without specific loan loss allowances:
		Retail				$	16.1		$	16.1		$	---		$	7.6
		Office					3.9			3.9			---			1.5
		Industrial					1			1			---			---
		Commercial					1.8			1.8			---			---
		Apartment and other					3.8			3.8			---			---
			Total impaired commercial mortgage loans without specific
				loan loss allowances			26.6			26.6			---			9.1
	With specific loan loss allowances:
		Retail					58.5			58.5			16.1			21.6
		Office					9.7			9.7			3.8			0.9
		Industrial					12.6			12.6			2.4			1.4
		Commercial					6			6			3.6			2.5
		Apartment and other					0.9			0.9			---			---
			Total impaired commercial mortgage loans with specific
				loan loss allowances			87.7			87.7			25.9			26.4
					Total impaired commercial mortgage loans	$	114.3		$	114.3		$	25.9		$	35.5
The decrease in the carrying value of impaired commercial mortgage loans at September 30, 2014 compared to December 31, 2013 was primarily due to a decrease in commercial mortgage loans with a specific allowance in the Company’s industrial and retail segments for the first nine months of 2014 associated with a small number of borrowers. At September 30, 2014 and December 31, 2013, the Company did not have any commercial mortgage loans greater than 90 days delinquent that were accruing interest.
A modification is considered to be a troubled debt restructuring when the debtor is experiencing financial difficulties and the restructured terms constitute a concession. Granting payment forbearance is not a modification of the loan if the payment forbearance is considered to be an insignificant timing difference associated with the borrowing. The Company evaluates all restructured commercial mortgage loans for indications of troubled debt restructurings and the potential losses related to these restructurings. If a loan is considered a troubled debt restructuring, the Company impairs the loan and records a specific allowance for estimated losses. In some cases, the recorded investment in the loan may increase post-restructuring. The Company assessed all restructurings that occurred during the period to determine if they were troubled debt restructurings. The Company did not identify any troubled debt restructurings that were not already considered impaired.
The following tables set forth information related to the troubled debt restructurings of financing receivables:
				Three Months Ended									Nine Months Ended
				30-Sep-14									30-Sep-14
							Pre-			Post-						Pre-			Post-
							Restructuring			Restructuring						Restructuring			Restructuring
				Number			Recorded			Recorded			Number			Recorded			Recorded
				of Loans			Investment			Investment			of Loans			Investment			Investment
				(Dollars in millions)
Troubled debt restructurings:
	Retail				33		$	27.5		$	24.9			34		$	28.3		$	25.6
	Office				1			0.7			0.7			1			0.7			0.7
	Industrial				1			0.4			0.4			3			2.1			2.3
	Commercial				---			---			---			1			2.7			2.7
		Total troubled debt restructurings			35		$	28.6		$	26			39		$	33.8		$	31.3
				Three Months Ended									Nine Months Ended
				30-Sep-13									30-Sep-13
							Pre-			Post-						Pre-			Post-
							Restructuring			Restructuring						Restructuring			Restructuring
				Number			Recorded			Recorded			Number			Recorded			Recorded
				of Loans			Investment			Investment			of Loans			Investment			Investment
				(Dollars in millions)
Troubled debt restructurings:
	Retail				10		$	15.5		$	13.2			16		$	20		$	20.8
	Office				---			---			---			3			1.6			1.6
	Industrial				2			2.2			2.3			2			2.2			2.3
	Commercial				---			---			---			1			0.9			0.9
		Total troubled debt restructurings			12		$	17.7		$	15.5			22		$	24.7		$	25.6
There were no troubled debt restructurings identified in the previous 12 months that subsequently defaulted during the first nine months of 2014.
The following table sets forth the average recorded investment in impaired commercial mortgage loans before specific loan loss allowances:
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2014			2013			2014			2013
	(In millions)
Average recorded investment	$	100.5		$	127.5		$	105.5		$	113.2
Interest Income
The Company records interest income in net investment income and continues to recognize interest income on delinquent commercial mortgage loans until the loans are more than 90 days delinquent. Interest income and accrued interest receivable are reversed when a loan is more than 90 days delinquent. For loans that are less than 90 days delinquent, management may reverse interest income and the accrued interest receivable if there is a question on the collectability of the interest. Interest income on loans in the 90-day delinquent category is recognized in the period the cash is collected. The Company resumes the recognition of interest income when the loan becomes less than 90 days delinquent and management determines it is probable that the loan will remain performing.
The amount of interest income recognized on impaired commercial mortgage loans was $0.9 million for both the third quarters of 2014 and 2013, and was $3.1 million and $3.3 million for the first nine months of 2014 and 2013, respectively. The cash received by the Company in payment of interest on impaired commercial mortgage loans was $0.8 million and $1.0 million for the third quarters of 2014 and 2013, respectively, and was $2.6 million and $3.0 million for the first nine months of 2014 and 2013, respectively.
The following tables set forth the aging of commercial mortgage loans by property type:
			30-Sep-14
																					Total
									Greater Than						Allowance						Commercial
			30 Days			60 Days			90 Days			Total			Related			Current,			Mortgage
			Past Due			Past Due			Past Due			Past Due			to Past Due			Net			Loans
			(In millions)
Commercial mortgage loans:
	Retail		$	1.1		$	---		$	6.7		$	7.8		$	-1.5		$	2,638.70		$	2,645.00
	Industrial			---			---			1.1			1.1			-0.2			1,005.00			1,005.90
	Office			---			---			2.8			2.8			-0.4			995.5			997.9
	Apartment and other			---			---			---			---			---			302			302
	Hotel/motel			---			---			---			---			---			175.1			175.1
	Commercial			---			---			---			---			---			216.7			216.7
		Total commercial mortgage loans	$	1.1		$	---		$	10.6		$	11.7		$	-2.1		$	5,333.00		$	5,342.60
			31-Dec-13
																					Total
									Greater Than						Allowance						Commercial
			30 Days			60 Days			90 Days			Total			Related			Current,			Mortgage
			Past Due			Past Due			Past Due			Past Due			to Past Due			Net			Loans
			(In millions)
Commercial mortgage loans:
	Retail		$	2.8		$	0.3		$	6.1		$	9.2		$	-1.5		$	2,621.50		$	2,629.20
	Industrial			---			3.3			1.8			5.1			-0.9			1,004.50			1,008.70
	Office			1.3			---			3.7			5			-0.9			978.3			982.4
	Apartment and other			---			---			---			---			---			289.9			289.9
	Hotel/motel			6.3			---			---			6.3			---			270			276.3
	Commercial			---			---			---			---			---			218.6			218.6
		Total commercial mortgage loans	$	10.4		$	3.6		$	11.6		$	25.6		$	-3.3		$	5,382.80		$	5,405.10
The Company closely monitors all past due commercial mortgage loans. Additional attention is given to those loans at least 60 days past due. Commercial mortgage loans that were at least 60 days past due totaled $10.6 million and $15.2 million at September 30, 2014 and December 31, 2013, respectively. Commercial mortgage loans at least 60 days past due were 0.19% and 0.28% of the commercial mortgage loan portfolio at September 30, 2014 and December 31, 2013, respectively. Commercial mortgage loans that have been granted payment forbearance are not considered to be past due and totaled $8.6 million and $40.1 million at September 30, 2014 and December 31, 2013, respectively.
Net Investment Income
The following table sets forth net investment income summarized by investment type:
					Three Months Ended						Nine Months Ended
					September 30,						September 30,
					2014			2013			2014			2013
					(In millions)
Fixed maturity securities					$	73.4		$	75.8		$	221		$	228.5
Commercial mortgage loans						83.1			84.9			250.1			252.2
Real estate						0.5			-0.3			0.7			-0.9
S&P 500 Index options						0.9			2.5			5.3			9.7
Other						---			2.2			4.4			7
			Gross investment income			157.9			165.1			481.5			496.5
Investment expenses						-4.5			-5.9			-17.9			-17.2
Tax-advantaged investment operating losses						-6.3			-3.4			-16.1			-10.2
				Net investment income	$	147.1		$	155.8		$	447.5		$	469.1
Realized Gross Capital Gains and Losses
The following table sets forth gross capital gains and losses by investment type:
				Three Months Ended						Nine Months Ended
				September 30,						September 30,
				2014			2013			2014			2013
				(In millions)
Gains:
	Fixed maturity securities			$	1.4		$	0.6		$	4.8		$	8.2
	Commercial mortgage loans				0.8			0.8			1.8			1.8
	Real Estate				0.8			0.4			1.9			0.7
	Other				0.2			---			0.2			0.2
		Gross capital gains			3.2			1.8			8.7			10.9
Losses:
	Fixed maturity securities				-0.4			-1.1			-1.5			-2.1
	Provision for commercial mortgage loan losses				-5.9			-3.8			-8.1			-12.8
	Real Estate				-1.7			-5.6			-3.4			-7
	Other				-0.4			---			-2.5			-1.9
		Gross capital losses			-8.4			-10.5			-15.5			-23.8
			Net capital losses	$	-5.2		$	-8.7		$	-6.8		$	-12.9
Securities Deposited as Collateral
Securities deposited for the benefit of policyholders in various states, in accordance with state regulations, amounted to $7.3 million at September 30, 2014 and $7.4 million at December 31, 2013.
Standard is a member of the Federal Home Loan Bank of Seattle (“FHLB of Seattle”). Standard issues collateralized funding agreements to the FHLB of Seattle and invests the cash received from advances to support various spread-based businesses and enhance its asset-liability management. Membership also provides an additional funding source and access to financial services that can be used as an alternative source of liquidity. At September 30, 2014, Standard had $102.1 million outstanding under funding agreements with the FHLB of Seattle and pledged $135.7 million of commercial mortgage loans as collateral for its outstanding advances. Standard had no outstanding funding agreements or pledged collateral with the FHLB of Seattle at December 31, 2013.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Financial Instruments [Abstract]	'
Derivative Financial Instruments	'
	8. DERIVATIVE FINANCIAL INSTRUMENTS
	The Company uses derivative financial instruments to mitigate business risks including interest rate risk exposure. The Company has the following derivatives on its consolidated balance sheets: interest rate swaps, index-based guarantees and S&P 500 Index options.
	Interest Rate Swaps
	In the second quarter of 2014, the Company began more extensive use of interest rate swaps to reduce risks from changes in interest rates, to manage interest rate exposures arising from asset and liability mismatches, and to protect the value of investments held on the balance sheet. The interest rate swaps used by the Company are designed to qualify for hedge accounting. Therefore, recognized changes in the fair value of the interest rate swaps and the gain or loss on the hedged items attributable to the hedged risk, are offset in capital gains and losses. Valuations for interest rate swaps are sensitive to changes in the interest rate environment.
	Interest income, interest expense and fees related to interest rate swaps are recorded as a component of net investment income.
	Interest rate swaps are recognized as either other invested assets or other liabilities in the consolidated balance sheets and are reported at fair value. To qualify for hedge accounting, the Company formally documents the risk management objective and strategy for undertaking the hedging transaction and the designation of the hedge as either a fair value hedge or a cash flow hedge at the inception of the hedging transaction. Included in this documentation is how the interest rate swap is expected to hedge the designated risk related to specific assets or liabilities on the balance sheet as well as a description of the method that will be used to retrospectively and prospectively assess the hedge effectiveness and the method that will be used to measure ineffectiveness and how this ineffectiveness will be accounted for.
	A derivative instrument designated as part of a hedging relationship must be assessed as being highly effective in offsetting the designated risk of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship, using qualitative and quantitative methods. Qualitative methods include comparison of critical terms of the derivative to the hedged item. Quantitative methods include regression or other statistical analysis of changes in the fair value or cash flows associated with the hedge relationship.
	In the event a hedged item is disposed, the Company will terminate the related interest rate swap and recognize the gain or loss on termination in the consolidated statements of income.
	Cash settlement activity of derivative contracts is reported in the consolidated statements of cash flows as a component of proceeds from or acquisition of other invested assets.
	In the consolidated balance sheets, the Company offsets fair value amounts recognized for interest rate swaps.
	Index-based Interest Guarantees
	The Company sells indexed annuities, which permit the holder to elect a fixed interest rate return or an indexed return, where interest credited to the contracts is based on the performance of the S&P 500 Index, subject to an upper limit or cap and minimum guarantees. The index-based interest guarantees do not qualify for hedge accounting. Policyholders may elect to rebalance between interest crediting options at renewal dates annually. At each renewal date, the Company has the opportunity to re-price the indexed component by changing the cap, subject to minimum guarantees. The Company estimates the fair value of the index-based interest guarantees for the current period and for all future reset periods until contract maturity. Changes in the fair value of the index-based interest guarantees are recorded to interest credited. The liability represents an estimate of the cost of the options to be purchased in the future to manage the risk related to the index-based interest guarantees. The liability for index-based interest guarantees is the present value of future cash flows attributable to the projected index growth that is in excess of cash flows attributable to fixed interest rates guarantees. The excess cash flows are discounted back to the date of the balance sheet using current market indicators for future interest rates and option costs. Cash flows depend on actuarial estimates for policyholder lapse behavior and management’s discretion in setting renewal index-based interest guarantees.
	S&P 500 Index Options
	The Company purchases S&P 500 Index options for its interest crediting strategy used in its indexed annuity product. The S&P 500 Index options do not qualify for hedge accounting. The S&P 500 Index options are purchased from investment banks and are selected in a manner that supports the amount of interest that is expected to be credited in the current year to annuity policyholder accounts that are dependent on the performance of the S&P 500 Index. The purchase of S&P 500 Index options is a pivotal part of the Company’s risk management strategy for indexed annuity products. The S&P 500 Index options are exclusively used for risk management. While valuations of the S&P 500 Index options are sensitive to a number of variables, valuations for S&P 500 Index options purchased are most sensitive to changes in the S&P 500 Index value and the implied volatilities of this index. Changes in the fair value of the S&P 500 Index options are recorded to net investment income. The Company generally purchases two S&P 500 Index option contracts per month, which have expiry dates of one year from the date of purchase.
	Option premiums paid for the Company’s index option contracts were $2.2 million for both the third quarters of 2014 and 2013, and $6.3 million and $6.8 million for the first nine months of 2014 and 2013, respectively. The Company received $4.7 million and $4.3 million for options exercised for the third quarters of 2014 and 2013, respectively, and $14.6 million and $13.7 million for the first nine months of 2014 and 2013, respectively.
	The following table sets forth the notional amount and the fair value of the Company’s derivative assets and liabilities:
				September 30,						December 31,
				2014						2013
				Notional			Fair			Notional			Fair
				Amount			Value			Amount			Value
				(In millions)
	Qualifying Fair Value Hedging Instruments
	Assets:
		Other invested assets:
			Interest rate swaps	$	350		$	0.7		$	---		$	---
	Non-Qualifying Hedging Instruments
	Assets:
		Other invested assets:
			S&P 500 Index options		375.4			12.8			350.5			15.8
	Liabilities:
		Other policyholder funds:
			Index-based interest guarantees		-1			69.4			-1			67.6
	The underlying factors for index-based guarantees vary by contract and other criteria, such as floors and ceilings on rates and future payouts.
	The following table sets forth the gross amounts of derivative instruments recorded on the balance sheet and the collateral pledged related to the derivative instruments:
				September 30,			December 31,
				2014			2013
				(In millions)
	Offsetting of Interest Rate Swaps
	Interest rate swaps, liabilities			$	-0.6		$	---
	Interest rate swaps, assets				1.3			---
		Net interest rate swaps			0.7			---
		Accrued interest payable			-1.8			---
		Collateral pledged			6.2			---
			Net amount	$	5.1		$	---
	The following table sets forth the amount of gains or losses recognized in the consolidated statements of income from the change in fair value of the Company’s derivative assets and liabilities:
					Three Months Ended						Nine Months Ended
					September 30,						September 30,
					2014			2013			2014			2013
					(In millions)
	Qualifying Fair Value Hedging Instruments
	Net capital gains:
		Interest rate swaps			$	2.3		$	---		$	0.7		$	---
	Non-Qualifying Hedging Instruments
	Net investment income:
		S&P 500 Index options				0.9			2.5			5.3			9.7
	Interest credited:
		Index-based interest guarantees				0.5			-1.6			-3.5			-6.1
				Net gains	$	3.7		$	0.9		$	2.5		$	3.6
	Fluctuations in the fair value of the interest rate swaps are driven by changes in the interest rate environment. Fluctuations in the fair value of the S&P 500 Index options are related to the volatility of the S&P 500 Index. Changes in fair value of the index-based interest guarantees are sensitive to a number of variables, but are most sensitive to changes in the interest rate environment.
	As a result of the Company’s annual update of the key assumptions used to value index-based interest guarantees, a process known as “unlocking”, interest credited decreased $1.4 million and increased $1.3 million for the third quarters of 2014 and 2013, respectively, and decreased $2.7 million and increased $2.7 million for the first nine months of 2014 and 2013, respectively.
	The ineffective portion of derivatives accounted for using hedge accounting was not material to the results of operations of the Company for the third quarters of 2014 and 2013 and for the first nine months of 2014 and 2013.
	Counterparty Credit Risk
	Interest rate swaps
As the Company uses a central counterparty (“CCP”) to clear all of its interest rate swaps, the Company is only exposed to the default of the CCP. Transactions with the CCP require the Company to pledge initial and variation margin collateral. At September 30, 2014, the Company pledged $6.2 million of cash and cash equivalents on its unaudited condensed consolidated balance sheets as collateral to the CCP.
S&P 500 Index options
The Company is exposed to the credit worthiness of the institutions from which it purchases its S&P 500 Index options and these institutions’ continued abilities to perform according to the terms of the contracts. The current values for the credit exposure have been affected by fluctuations in the S&P 500 Index. The Company’s maximum credit exposure would require an increase of 6.0% in the value of the S&P 500 Index. The maximum credit risk is calculated using the cap strike price of the Company’s S&P 500 Index options less the floor price, multiplied by the notional amount of the S&P 500 Index options.
The following table sets forth the fair value of the Company’s S&P 500 Index options and its maximum credit risk exposure related to these instruments:
			30-Sep-14
			Assets at			Maximum
			Fair Value			Credit Risk
			(In millions)
Counterparty:
	The Bank of New York Mellon		$	6.7		$	9
	Goldman Sachs			4.6			6.4
	Merrill Lynch International			1.5			3.1
		Total	$	12.8		$	18.5

Deferred_Acquisition_Costs_DAC

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets	9 Months Ended
	Sep. 30, 2014
Deferred Acquisition Costs, Value Of Business Acquired And Other Intangible Assets Disclosures [Abstract]	'
Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets	'
	9. DEFERRED ACQUISITION COSTS (“DAC”), VALUE OF BUSINESS ACQUIRED (“VOBA”) AND OTHER INTANGIBLE ASSETS
	DAC, VOBA and other acquisition related intangible assets are generally originated through the issuance of new business or the purchase of existing business, either by purchasing blocks of insurance policies from other insurers or by the outright purchase of other companies. The Company’s other intangible assets are subject to impairment tests on an annual basis or more frequently if circumstances indicate that carrying values may not be recoverable.
	The following table sets forth activity for DAC, VOBA and other intangible assets:
				Nine Months Ended			Year Ended
				30-Sep-14			31-Dec-13
				(In millions)
	Carrying value at beginning of period, net:
		DAC		$	319.1		$	284.9
		VOBA			20.1			23.4
		Other intangible assets			32.1			38.2
			Total balance at beginning of period, net		371.3			346.5
	Deferred or acquired during period:
		DAC			58.9			76.9
			Total deferred or acquired during period		58.9			76.9
	Amortized during period:
		DAC			-48			-42.7
		VOBA			-1.6			-3.3
		Other intangible assets			-4.4			-6.1
			Total amortized during period		-54			-52.1
	Carrying value at end of period, net:
		DAC			330			319.1
		VOBA			18.5			20.1
		Other intangible assets			27.7			32.1
			Total carrying value at end of period, net	$	376.2		$	371.3
	The Company defers certain acquisition costs that vary with and are directly related to the origination of new business. Certain costs related to obtaining new business and acquiring business through reinsurance agreements have been deferred and will be amortized to accomplish matching against related future premiums or gross profits as appropriate. The Company normally defers certain acquisition-related commissions and incentive payments, certain costs of policy issuance and underwriting, and certain printing costs. Assumptions used in developing DAC and amortization amounts each period include the amount of business in-force, expected future persistency, withdrawals, interest rates and profitability. These assumptions are modified to reflect actual experience when appropriate. Additional amortization of DAC is charged to current earnings, to the extent it is determined that future premiums or gross profits are not adequate to cover the remaining amounts deferred. Changes in actual persistency are reflected in the calculated DAC balance. Costs that are not directly associated with the acquisition of new business are not deferred as DAC and are charged to expense as incurred. Generally, annual commissions are considered expenses and are not deferred.
	DAC for group and individual disability insurance products and group life insurance products is amortized over the life of related policies in proportion to future premiums. The Company amortizes DAC for group disability and life insurance products over the initial premium rate guarantee period, which averages 2.5 years. DAC for individual disability insurance products is amortized in proportion to future premiums over the life of the contract, averaging 20 to 25 years with approximately 50% and 75% expected to be amortized by years 10 and 15, respectively.
	The Company’s individual deferred annuities and group annuity products are classified as investment contracts. DAC related to these products is amortized over the life of related policies in proportion to expected gross profits. For the Company’s individual deferred annuities, DAC is generally amortized over 30 years with approximately 55% and 95% expected to be amortized by years 5 and 15, respectively. DAC for group annuity products is amortized over 10 years with approximately 80% expected to be amortized by year five.
	VOBA primarily represents the discounted future profits of business assumed through reinsurance agreements. The Company has established VOBA for a block of individual disability business assumed from Minnesota Life Insurance Company (“Minnesota Life”) and a block of group disability and group life business assumed from Teachers Insurance and Annuity Association of America (“TIAA”). VOBA is generally amortized in proportion to future premiums for group and individual disability insurance products and group life products. However, the VOBA related to the TIAA transaction associated with an in-force block of group long term disability claims for which no ongoing premium is received is amortized in proportion to expected gross profits. If actual premiums or future profitability are inconsistent with the Company’s assumptions, the Company could be required to make adjustments to VOBA and related amortization. The VOBA associated with the TIAA transaction is amortized in proportion to expected gross profits with an amortization period of up to 20 years. For the VOBA associated with the Minnesota Life block of business assumed, the amortization period is up to 30 years and is amortized in proportion to future premiums. The accumulated amortization of VOBA was $70.3 million and $68.7 million at September 30, 2014 and December 31, 2013, respectively.
	The following table sets forth the amount of DAC and VOBA balances amortized in proportion to expected gross profits and the percentage of the total balance of DAC and VOBA amortized in proportion to expected gross profits:
		30-Sep-14						31-Dec-13
		Amount			Percent			Amount		Percent
		(Dollars in millions)
	DAC	$	79.2		24	%		$	80.1	25.1	%
	VOBA		3.9		21.1				4.3	21.4
	Key assumptions, which will affect the determination of expected gross profits for determining DAC and VOBA balances, are:
	Persistency.
	Interest rates, which affect both investment income and interest credited.
	Stock market performance.
	Capital gains and losses.
	Claim termination rates.
	Amount of business in-force.
	These assumptions are modified to reflect actual experience when appropriate. Although a change in a single assumption may have an impact on the calculated amortization of DAC or VOBA for balances associated with investment contracts, it is the relationship of that change to the changes in other key assumptions that determines the ultimate impact on DAC or VOBA amortization. Because actual results and trends related to these assumptions vary from those assumed, the Company revises these assumptions annually to reflect its current best estimate of expected gross profits. As a result of this process, known as “unlocking”, the cumulative balances of DAC and VOBA are adjusted with an offsetting benefit or charge to income to reflect changes in the period of the revision. An unlocking event generally occurs as a result of actual experience or future expectations differing from previous estimates. As a result of unlocking, the amortization schedule for future periods is also adjusted.
	The following table sets forth the impact of unlocking on DAC and VOBA balances:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014		2013
		(In millions)
	(Decrease) increase to DAC and VOBA	$	-1.1		$	0.3		$	-1.9	$	-0.9
	Significant, unanticipated changes in key assumptions, which affect the determination of expected gross profits, may result in a large unlocking event that could have a material effect on the Company’s financial position or results of operations. However, future changes in DAC and VOBA balances due to changes in underlying assumptions are not expected to be material.
	The Company’s other intangible assets are subject to amortization and consist of certain customer lists from Asset Management business acquired and an individual disability marketing agreement. Customer lists have a combined estimated weighted-average remaining life of 6.5 years. The marketing agreement that accompanied the Minnesota Life transaction provides access to Minnesota Life agents, some of whom now market Standard’s individual disability insurance products. The Minnesota Life marketing agreement will be fully amortized by the end of 2023. The accumulated amortization of other intangible assets was $47.0 million and $42.6 million at September 30, 2014 and December 31, 2013, respectively.
	The following table sets forth the estimated net amortization of VOBA and other intangible assets for the remainder of 2014 and for each of the next five years:
		Amount
		(In millions)
	2014	$	1.9
	2015		6.9
	2016		5.6
	2017		4.2
	2018		4.2
	2019		4

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments And Contingencies [Abstract]	'
Commitments And Contingencies	'
	10. COMMITMENTS AND CONTINGENCIES
	Litigation Contingencies
	In the normal course of business, the Company is involved in various legal actions and other state and federal proceedings. A number of actions or proceedings were pending at September 30, 2014. In some instances, lawsuits include claims for punitive damages and similar types of relief in unspecified or substantial amounts, in addition to amounts for alleged contractual liability or other compensatory damages. In the opinion of management, the ultimate liability, if any, arising from the actions or proceedings is not expected to have a material effect on the Company’s business, financial position, results of operations or cash flows.
	Senior Unsecured Revolving Credit Facility (“Facility”) Contingencies
	The Company maintains a $250 million Facility. Upon the request of StanCorp and with the consent of the lenders under the Facility, the Facility can be increased to $350 million. The termination date of the Facility is June 22, 2018. The Company expects to use the Facility for working capital, general corporate purposes and for the issuance of letters of credit.
	Under the agreement, the Company is subject to two financial covenants, which are based on the Company's ratio of total debt to total capitalization and consolidated net worth. The Company is also subject to covenants that limit subsidiary indebtedness. The Facility is subject to pricing levels based upon the Company's publicly announced debt ratings and includes an interest rate option at the election of the borrower of a base rate plus the applicable margin or LIBOR plus the applicable margin, plus facility and utilization fees. At September 30, 2014, the Company was in compliance with all financial covenants under the Facility and had no outstanding balance on the Facility.
	Other Financing Obligations
	The Company has $250 million of 5.00% 10-year senior notes (“Senior Notes’’), which mature on August 15, 2022. Interest is paid semi-annually on February 15 and August 15.
	The Company has $252.9 million of 6.90% junior subordinated debentures (“Subordinated Debt”), which matures on June 1, 2067 and is non-callable prior to June 1, 2017. In the first quarter of 2014, the Company repurchased $47.1 million in principal amount of Subordinated Debt. Interest is payable semi-annually on June 1 and December 1 until June 1, 2017, and quarterly thereafter at a floating rate equal to three-month LIBOR plus 2.51%. StanCorp has the option to defer interest payments for up to five years. The declaration and payment of dividends to shareholders would be restricted if the Company elected to defer interest payments on its Subordinated Debt. If elected, the restriction would be in place during the interest deferral period. The Company is currently not deferring interest on the Subordinated Debt.
	At September 30, 2014, the Company had $43.4 million of unfunded commitments to fund tax-advantaged investment partnerships. These commitments are recorded as other liabilities in the Company’s consolidated balance sheet, with a corresponding recognition to other invested assets.
	In the normal course of business, the Company commits to fund commercial mortgage loans generally up to 90 days in advance. At September 30, 2014, the Company had outstanding commitments to fund commercial mortgage loans totaling $143.9 million, with fixed interest rates ranging from 4.00% to 6.00%. These commitments generally have fixed expiration dates. A small percentage of commitments expire due to the borrower failing to deliver the required items by the expiration date. In these cases, the Company will retain the commitment fee and good faith deposit. Alternatively, if the Company terminates a commitment due to the disapproval of a commitment requirement, the commitment fee and good faith deposit may be refunded to the borrower, less an administrative fee.

Accounting_Pronouncements

Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
Accounting Pronouncements [Abstract]	'
Accounting Pronouncements	'
	11. ACCOUNTING PRONOUNCEMENTS
	Accounting Standards Update (“ASU”) No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects
	In January 2014, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The main objective of ASU No. 2014-01 is to provide guidance on accounting for investments in affordable housing projects that qualify for low income housing tax credits. Under this guidance, entities could make a policy election to account for qualified affordable housing projects under the proportionate amortization method (“PAM”) of accounting. Under PAM, the cost of low income housing tax credit investments is amortized in each period as a proportion of the tax credits and benefits of tax losses received in that period and allows the benefits from tax losses on the asset, the losses that reduce the asset balance of the investment and the tax credits to be recorded in the income tax expense line on the consolidated statements of income.
	ASU No. 2014-01 is effective for annual periods and interim reporting periods within those annual periods beginning after December 15, 2014. Early adoption is permitted. The Company currently invests in affordable housing projects that qualify for low income housing tax credits and is assessing the impact of accounting for these investments under PAM.
	ASU No. 2014-09, Revenue from Contracts with Customers
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The main objective of ASU No. 2014-09 is to provide a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This ASU does not apply to insurance contracts, financial instruments, and various other topics within the FASB Accounting Standards Codification. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services.
	ASU No. 2014-09 is effective for annual periods and interim reporting periods within those annual periods beginning after December 15, 2016. Early adoption is not permitted. The Company’s revenue is primarily from insurance contracts and financial instruments; therefore, the Company does not expect this ASU to have a material effect on its results of operations.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	12. INCOME TAXES
	Income taxes may differ from the amount computed by applying the federal corporate tax rate of 35% to pre-tax income because of the net results of permanent differences between book and taxable income, tax credits and the inclusion of state and local income taxes, net of the federal tax benefit.
	The following table sets forth the combined federal and state effective income tax rates:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Combined federal and state effective income tax rates	26.6	%	27.9	%	23.6	%	25.9	%
	The decreases in the effective tax rates for the third quarter and first nine months of 2014 compared to the same periods of 2013 were primarily due to a higher utilization of tax credits during the first nine months of 2014 due to purchases of tax-advantaged investments.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2014
AOCI, net of tax [Abstract]	'
Accumulated Other Comprehensive Income [Text Block]	'
	13. ACCUMULATED OTHER COMPREHENSIVE INCOME
	The following table sets forth the changes in accumulated other comprehensive income (loss) by component:
				Net Unrealized				Total
				Gains (Losses) on				Accumulated
				Fixed Maturity		Employee		Other
				Securities		Benefit		Comprehensive
				Available-for-Sale		Plans		Income (Loss)
				(In millions)
	Balance, January 1, 2013			$	383	$	-73.7	$	309.3
		Other comprehensive (loss) income, net of tax
			before reclassification adjustment(1)		-205.3		41.2		-164.1
		Amounts reclassified from accumulated
			other comprehensive income, net of tax(2)		-4.5		-6		-10.5
	Net other comprehensive (loss) income, net of tax				-209.8		35.2		-174.6
	Balance, December 31, 2013				173.2		-38.5		134.7
		Other comprehensive income (loss), net of tax
			before reclassification adjustment(3)		55.3		-0.4		54.9
		Amounts reclassified from accumulated
			other comprehensive (loss) income, net of tax(4)		-2.1		1.2		-0.9
	Net other comprehensive income, net of tax				53.2		0.8		54
	Balance, September 30, 2014			$	226.4	$	-37.7	$	188.7
	(1) Net of tax benefit of $111.1 million for net unrealized losses on fixed maturity securities and net of tax expense of $22.2 million for employee benefits.
	(2) Net of tax benefits of $3.1 million for net unrealized gains on fixed maturity securities and $3.2 million for employee benefits, respectively.
	(3) Net of tax expense of $27.2 million for net unrealized gains on fixed maturity securities and net of tax benefit of $0.3 million for employee benefits.
	(4) Net of tax benefit of $1.1 million for net unrealized gains on fixed maturity securities and net of tax expense of $0.7 million for employee benefits.

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2014
Net Income Per Common Share [Abstract]	'
Calculation Of Net Income Per Basic And Diluted Weighted-Average Common Shares Outstanding	'
			Three Months Ended				Nine Months Ended
			September 30,				September 30,
			2014		2013		2014		2013
	Net income (In millions)		$	71.1	$	59	$	163.1	$	163.5
	Basic weighted-average common shares outstanding			42,777,337		44,271,160		43,324,269		44,307,863
	Stock options			362,634		273,338		372,615		146,247
	Stock awards			44,199		65,860		39,948		60,490
	Diluted weighted-average common shares outstanding			43,184,170		44,610,358		43,736,832		44,514,600
	Net income per common share:
		Basic	$	1.66	$	1.33	$	3.76	$	3.69
		Diluted		1.65		1.32		3.73		3.67
	Antidilutive shares not included in net income per diluted common
		share calculation		150,475		---		54,986		559,575

Share_Based_Compensation_Table

Share Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Share-Based Compensation	'
Schedule of Compensation Cost and Related Income Tax Benefit under Share-Based Compensation Plans	'
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Compensation cost	$	1.8	$	3.2	$	4.9	$	5.9
	Related income tax benefit		0.6		1.2		1.7		2.1
Schedule of Compensation Cost and Related Income Tax Benefit under Employee Stock Purchase Plans	'
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Compensation cost	$	---	$	0.1	$	0.2	$	0.3
	Related income tax benefit		---		---		0.1		0.1

Retirement_Benefits_Tables

Retirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2014
Retirement Benefits [Abstract]	'
Componets of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income for Pension Benefits.	'
								Three Months Ended						Nine Months Ended
								September 30,						September 30,
								2014			2013			2014			2013
								(In millions)
	Components of net periodic benefit (credit) cost:
			Service cost					$	2.2		$	2.6		$	6.6		$	7.7
			Interest cost						4.8			4.1			14.4			12.4
			Expected return on plan assets						-8.4			-7.4			-25.1			-22
			Amortization of prior service cost						0.2			0.2			0.5			0.5
			Amortization of net actuarial loss						0.1			2.3			0.3			7
					Net periodic benefit (credit) cost				-1.1			1.8			-3.3			5.6
	Other changes in plan assets and benefit obligation recognized
		in other comprehensive income:
			Amortization of prior service cost						-0.2			-0.2			-0.5			-0.5
			Amortization of net actuarial loss						-0.1			-2.3			-0.3			-7
					Total recognized in other comprehensive income				-0.3			-2.5			-0.8			-7.5
						Total recognized in net periodic benefit (credit) cost and
							other comprehensive income	$	-1.4		$	-0.7		$	-4.1		$	-1.9
Components of Net Periodic Benefit Cost (Benefit) and Other Amounts Recognized in Other Comprehensive Income for Postretirement Benefits	'
							Three Months Ended						Nine Months Ended
							September 30,						September 30,
							2014			2013			2014			2013
							(In millions)
	Components of net periodic benefit cost (credit):
			Service cost				$	---		$	0.1		$	---		$	0.1
			Interest cost					0.2			0.3			0.6			0.7
			Expected return on plan assets					-0.2			-0.3			-0.6			-0.7
			Amortization of prior service cost					---			---			---			-26.4
			Amortization of net actuarial (gain) loss					---			---			-0.6			5.8
				Net periodic benefit cost (credit)				---			0.1			-0.6			-20.5
	Other changes in plan assets and benefit obligation recognized in
		other comprehensive income:
			Amortization of prior service cost					---			---			---			26.4
			Amortization of net actuarial gain (loss)					---			---			0.6			-5.8
				Total recognized in other comprehensive income				---			---			0.6			20.6
					Total recognized in net periodic benefit credit
						and other comprehensive income	$	---		$	0.1		$	---		$	0.1

Segments_Tables

Segments (Tables)	9 Months Ended
	Sep. 30, 2014
Segments [Abstract]	'
Intersegment Administrative Fee Revenues	'
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
	Intersegment administrative fees	$	4.9		$	4.7		$	14.5		$	14
Premiums, Administrative Fees and Net Investment Income by Major Product Line or Category	'
							Three Months Ended						Nine Months Ended
							September 30,						September 30,
							2014			2013			2014			2013
							(In millions)
	Premiums:
		Insurance Services:
			Group life and AD&D				$	202		$	210.4		$	605.1		$	640.3
			Group long term disability					187.1			191.3			565.7			589.6
			Group short term disability					55.2			56.4			167			171.9
			Group other					19.9			19.8			58.5			58.1
			Experience rated refunds					-10.3			-3.2			-15.7			-12
				Total Employee Benefits				453.9			474.7			1,380.60			1,447.90
				Individual Disability				50.3			48.3			147.3			142
					Total Insurance Services premiums			504.2			523			1,527.90			1,589.90
		Asset Management:
				Retirement plans				0.5			0.3			1.7			1.7
				Individual annuities				2.6			1.1			7			4.1
					Total Asset Management premiums			3.1			1.4			8.7			5.8
						Total premiums	$	507.3		$	524.4		$	1,536.60		$	1,595.70
	Administrative fees:
		Insurance Services:
				Employee Benefits			$	3.8		$	3.8		$	12.2		$	10.7
				Individual Disability				---			0.1			0.1			0.2
					Total Insurance Services administrative fees			3.8			3.9			12.3			10.9
		Asset Management:
				Retirement plans				25.5			23.5			74.2			69.3
				Other financial services businesses				8.4			7.8			25			23.4
					Total Asset Management administrative fees			33.9			31.3			99.2			92.7
		Other administrative fees						-4.9			-4.7			-14.5			-14
						Total administrative fees	$	32.8		$	30.5		$	97		$	89.6
	Net investment income:
		Insurance Services:
				Employee Benefits			$	60.7		$	65.8		$	185.2		$	201.4
				Individual Disability				13			13.2			39.1			39.5
					Total Insurance Services net investment income			73.7			79			224.3			240.9
		Asset Management:
				Retirement plans				28.1			26.2			83.9			75.4
				Individual annuities				37.2			43.4			116.9			131.6
				Other financial services businesses				4.1			3.8			10.3			10.4
					Total Asset Management net investment income			69.4			73.4			211.1			217.4
		Other net investment income						4			3.4			12.1			10.8
						Total net investment income	$	147.1		$	155.8		$	447.5		$	469.1
Segment Information	'
					Three Months Ended September 30, 2014
											Total
					Employee			Individual			Insurance			Asset
					Benefits			Disability			Services			Management			Other		Total
					(In millions)
	Revenues:
		Premiums			$	453.9		$	50.3		$	504.2		$	3.1		$	---	$	507.3
		Administrative fees				3.8			---			3.8			33.9			-4.9		32.8
		Net investment income				60.7			13			73.7			69.4			4		147.1
		Net capital losses				---			---			---			---			-5.2		-5.2
				Total revenues		518.4			63.3			581.7			106.4			-6.1		682
	Benefits and expenses:
		Benefits to policyholders				321.1			34.1			355.2			5.6			---		360.8
		Interest credited				0.7			---			0.7			38			---		38.7
		Operating expenses				82.2			7.1			89.3			31.3			-0.7		119.9
		Commissions and bonuses				30.5			12.9			43.4			9.8			---		53.2
		Premium taxes				6.6			0.9			7.5			---			---		7.5
		Interest expense				---			---			---			---			7.8		7.8
		Net decrease (increase) in DAC, VOBA
			and other intangible assets			0.4			-4.1			-3.7			0.9			---		-2.8
				Total benefits and expenses		441.5			50.9			492.4			85.6			7.1		585.1
	Income (loss) before income taxes				$	76.9		$	12.4		$	89.3		$	20.8		$	-13.2	$	96.9
					Three Months Ended September 30, 2013
											Total
					Employee			Individual			Insurance			Asset
					Benefits			Disability			Services			Management			Other		Total
					(In millions)
	Revenues:
		Premiums			$	474.7		$	48.3		$	523		$	1.4		$	---	$	524.4
		Administrative fees				3.8			0.1			3.9			31.3			-4.7		30.5
		Net investment income				65.8			13.2			79			73.4			3.4		155.8
		Net capital losses				---			---			---			---			-8.7		-8.7
				Total revenues		544.3			61.6			605.9			106.1			-10		702
	Benefits and expenses:
		Benefits to policyholders				356			35.2			391.2			3.8			---		395
		Interest credited				0.6			---			0.6			43.3			---		43.9
		Operating expenses				79			7.1			86.1			28.9			-0.2		114.8
		Commissions and bonuses				30.4			13.1			43.5			8.4			---		51.9
		Premium taxes				8.1			1			9.1			---			---		9.1
		Interest expense				---			---			---			---			8.6		8.6
		Net decrease (increase) in DAC, VOBA
			and other intangible assets			1.6			-4.5			-2.9			-0.2			---		-3.1
				Total benefits and expenses		475.7			51.9			527.6			84.2			8.4		620.2
	Income (loss) before income taxes				$	68.6		$	9.7		$	78.3		$	21.9		$	-18.4	$	81.8
					Nine Months Ended September 30, 2014
											Total
					Employee			Individual			Insurance			Asset
					Benefits			Disability			Services			Management			Other		Total
					(In millions)
	Revenues:
		Premiums			$	1,380.60		$	147.3		$	1,527.90		$	8.7		$	---	$	1,536.60
		Administrative fees				12.2			0.1			12.3			99.2			-14.5		97
		Net investment income				185.2			39.1			224.3			211.1			12.1		447.5
		Net capital losses				---			---			---			---			-6.8		-6.8
				Total revenues		1,578.00			186.5			1,764.50			319			-9.2		2,074.30
	Benefits and expenses:
		Benefits to policyholders				1,073.70			98.9			1,172.60			15.5			---		1,188.10
		Interest credited				2.6			---			2.6			120.2			---		122.8
		Operating expenses				238.3			20.7			259			91.3			-2		348.3
		Commissions and bonuses				93.5			35.6			129.1			25.6			---		154.7
		Premium taxes				22			2.7			24.7			---			---		24.7
		Interest expense				---			---			---			---			24.1		24.1
		Net (increase) decrease in DAC, VOBA
		and other intangible assets			-0.3			-8.9			-9.2			7.2			---		-2
			Total benefits and expenses		1,429.80			149			1,578.80			259.8			22.1		1,860.70
Income (loss) before income taxes				$	148.2		$	37.5		$	185.7		$	59.2		$	-31.3	$	213.6
Total assets				$	5,740.00		$	2,349.80		$	8,089.80		$	13,775.60		$	573.3	$	22,438.70
				Nine Months Ended September 30, 2013
										Total
				Employee			Individual			Insurance			Asset
				Benefits			Disability			Services			Management			Other		Total
				(In millions)
Revenues:
	Premiums			$	1,447.90		$	142		$	1,589.90		$	5.8		$	---	$	1,595.70
	Administrative fees				10.7			0.2			10.9			92.7			-14		89.6
	Net investment income				201.4			39.5			240.9			217.4			10.8		469.1
	Net capital losses				---			---			---			---			-12.9		-12.9
			Total revenues		1,660.00			181.7			1,841.70			315.9			-16.1		2,141.50
Benefits and expenses:
	Benefits to policyholders				1,153.10			93.9			1,247.00			13.9			---		1,260.90
	Interest credited				2.8			---			2.8			128			---		130.8
	Operating expenses				232.8			19.7			252.5			85.9			-14.1		324.3
	Commissions and bonuses				96.5			35.4			131.9			24.6			---		156.5
	Premium taxes				24.7			3			27.7			---			---		27.7
	Interest expense				---			---			---			---			25.7		25.7
	Net decrease (increase) in DAC, VOBA
		and other intangible assets			0.9			-9.6			-8.7			3.7			---		-5
			Total benefits and expenses		1,510.80			142.4			1,653.20			256.1			11.6		1,920.90
Income (loss) before income taxes				$	149.2		$	39.3		$	188.5		$	59.8		$	-27.7	$	220.6
Total assets				$	5,805.00		$	2,369.50		$	8,174.50		$	12,224.70		$	527.1	$	20,926.30

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Abstract	'
Estimated Fair Value and the Carrying Value of Each Financial Instrument Categorized by Fair Value Hierarcy	'
							30-Sep-14
							Carrying			Fair
							Value			Value			Level 1		Level 2		Level 3
							(In millions)
	Assets:
		Fixed maturity securities:
			Corporate bonds				$	7,149.90		$	7,149.90		$	---	$	7,068.40	$	81.5
			U.S. government and agency bonds					303.2			303.2			---		303.2		---
			U.S. state and political subdivision bonds					136.5			136.5			---		136.5		---
			Foreign government bonds					65			65			---		65		---
				Total fixed maturity securities			$	7,654.60		$	7,654.60		$	---	$	7,573.10	$	81.5
		Commercial mortgage loans, net					$	5,342.60		$	5,822.30		$	---	$	---	$	5,822.30
		S&P 500 Index options						12.8			12.8			---		---		12.8
		Interest rate swaps						0.7			0.7			---		0.7		---
		Policy loans						2.2			2.2			---		---		2.2
		Separate account assets						7,031.90			7,031.90			6,907.00		124.9		---
	Liabilities:
		Total other policyholder funds,
			investment-type contracts				$	5,694.50		$	5,957.90		$	---	$	---	$	5,957.90
		Index-based interest guarantees						69.4			69.4			---		---		69.4
		Short-term debt						1.2			1.6			---		1.6		---
		Long-term debt						503.7			537.2			---		537.2		---
							31-Dec-13
							Carrying			Fair
							Value			Value			Level 1		Level 2		Level 3
							(In millions)
	Assets:
		Fixed maturity securities:
			Corporate bonds				$	6,545.70		$	6,545.70		$	---	$	6,429.70	$	116
			U.S. government and agency bonds					353.2			353.2			---		353.2		---
			U.S. state and political subdivision bonds					140.3			140.3			---		140.3		---
			Foreign government bonds					65.5			65.5			---		65.5		---
			S&P 500 Index options					15.8			15.8			---		---		15.8
				Total fixed maturity securities			$	7,120.50		$	7,120.50		$	---	$	6,988.70	$	131.8
		Commercial mortgage loans, net					$	5,405.10		$	5,769.60		$	---	$	---	$	5,769.60
		Policy loans						2.5			2.5			---		---		2.5
		Separate account assets						6,393.20			6,393.20			6,249.20		144		---
	Liabilities:
		Other policyholder funds,
			investment-type contracts				$	5,469.80		$	5,632.70		$	---	$	---	$	5,632.70
		Index-based interest guarantees						67.6			67.6			---		---		67.6
		Short-term debt						1.5			1.9			---		1.9		---
		Long-term debt						551.9			553.6			---		553.6		---
Valuation Techniques Fair Values Of Assets And Liabilities Measured And Recorded At Fair Value On A Recurring Basis	'
								30-Sep-14					31-Dec-13
								Fair			Range		Fair		Range
				Valuation Technique		Unobservable Input		Value			of inputs		Value		of inputs
				(Dollars in millions)
	S&P 500 Index options			Black-Scholes option pricing model		Various assumptions		$	12.8		(a)		$	15.8	(a)
	Index-based interest			Discounted cash		Expected future		$	69.4		1% - 3%		$	67.6	1% - 6%
		guarantees		flow		option purchase
						Various assumptions					(b)				(b)
				Black-Scholes option pricing model		Various assumptions					(a)				(a)
	Commercial mortgage loans			Appraisals		Reduction on appraisal		$	58.5		0% - 40%		$	68.7	0% - 13%
				Cash flows		Capitalization rate (c)					7% - 16%				7% - 16%
	Real Estate Owned			Appraisals		Reduction on appraisal		$	13.9		0% - 11%		$	35.2	0% - 53%
Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Level 3 Inputs	'
				Three Months Ended September 30, 2014
				Assets													Liabilities
				U.S.			U.S. State										Index-
				Government			and Political						S&P 500				Based
				and Agency			Subdivision			Corporate			Index		Total		Interest
				Bonds			Bonds			Bonds			Options		Assets		Guarantees
				(In millions)
	Beginning balance			$	---		$	---		$	83.3		$	14.4	$	97.7	$	68.3
	Total realized/unrealized gains (losses):
		Included in net income			---			---			---			0.9		0.9		-0.5
		Included in other comprehensive income (loss)			---			---			-1.8			---		-1.8		---
	Purchases, issuances, sales and settlements:
		Purchases			---			---			---			2.2		2.2		---
		Issuances			---			---			---			---		---		3.4
		Sales			---			---			---			---		---		---
		Settlements			---			---			---			-4.7		-4.7		-1.8
	Transfers into level 3				---			---			---			---		---		---
	Transfers out of level 3				---			---			---			---		---		---
	Ending balance			$	---		$	---		$	81.5		$	12.8	$	94.3	$	69.4
				Three Months Ended September 30, 2013
				Assets													Liabilities
				U.S.			U.S. State										Index-
				Government			and Political						S&P 500				Based
				and Agency			Subdivision			Corporate			Index		Total		Interest
				Bonds			Bonds			Bonds			Options		Assets		Guarantees
				(In millions)
	Beginning balance			$	---		$	---		$	51.9		$	13.7	$	65.6	$	62.6
	Total realized/unrealized gains (losses):
		Included in net income			---			---			---			2.5		2.5		1.6
		Included in other comprehensive income (loss)			---			---			12.3			---		12.3		---
	Purchases, issuances, sales and settlements:
		Purchases			---			---			---			2.2		2.2		---
		Issuances			---			---			---			---		---		1.4
		Sales			---			---			---			---		---		---
		Settlements			---			---			---			-4.3		-4.3		-0.9
	Transfers into level 3				---			---			1.3			---		1.3		---
	Transfers out of level 3				---			---			-0.3			---		-0.3		---
	Ending balance			$	---		$	---		$	65.2		$	14.1	$	79.3	$	64.7
				Nine Months Ended September 30, 2014
				Assets													Liabilities
				U.S.			U.S. State										Index-
				Government			and Political						S&P 500				Based
				and Agency			Subdivision			Corporate			Index		Total		Interest
				Bonds			Bonds			Bonds			Options		Assets		Guarantees
				(In millions)
	Beginning balance			$	---		$	---		$	116		$	15.8	$	131.8	$	67.6
	Total realized/unrealized gains (losses):
		Included in net income			---			---			---			5.3		5.3		3.5
		Included in other comprehensive income (loss)			---			---			-3.9			---		-3.9		---
	Purchases, issuances, sales and settlements:
		Purchases			---			---			---			6.3		6.3		---
		Issuances			---			---			---			---		---		5.2
		Sales			---			---			---			---		---		---
		Settlements			---			---			---			-14.6		-14.6		-6.9
	Transfers into Level 3				---			---			---			---		---		---
	Transfers out of Level 3				---			---			-30.6			---		-30.6		---
	Ending balance			$	---		$	---		$	81.5		$	12.8	$	94.3	$	69.4
				Nine Months Ended September 30, 2013
				Assets													Liabilities
				U.S.			U.S. State										Index-
				Government			and Political						S&P 500				Based
				and Agency			Subdivision			Corporate			Index		Total		Interest
				Bonds			Bonds			Bonds			Options		Assets		Guarantees
			(In millions)
Beginning balance			$	1.1		$	1.7		$	80.4		$	11.3	$	94.5	$	57.4
Total realized/unrealized gains (losses):
	Included in net income			---			---			---			9.7		9.7		6.1
	Included in other comprehensive income (loss)			---			---			7.2			---		7.2		---
Purchases, issuances, sales and settlements:
	Purchases			---			---			---			6.8		6.8		---
	Issuances			---			---			---			---		---		4.3
	Sales			---			---			---			---		---		---
	Settlements			---			---			---			-13.7		-13.7		-3.1
Transfers into Level 3				---			---			8.3			---		8.3		---
Transfers out of Level 3				-1.1			-1.7			-30.7			---		-33.5		---
Ending balance			$	---		$	---		$	65.2		$	14.1	$	79.3	$	64.7
Changes in unrealized gains (losses) included in net income relating to positions still held	'
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Assets:
		S&P 500 Index options	$	0.7		$	0.3		$	3.3		$	4.5
	Liabilities:
		Index-based interest guarantees		-0.8			-2			-7.9			-7.3
Assets measured at fair value on a nonrecurring basis and still held as of the balance sheet date	'
			30-Sep-14
			Total			Level 1			Level 2			Level 3
			(In millions)
	Commercial mortgage loans		$	58.5		$	---		$	---		$	58.5
	Real Estate Owned			13.9			---			---			13.9
		Total assets measured at fair value on a nonrecurring basis	$	72.4		$	---		$	---		$	72.4
			31-Dec-13
			Total			Level 1			Level 2			Level 3
			(In millions)
	Commercial mortgage loans		$	68.7		$	---		$	---		$	68.7
	Real Estate Owned			35.2			---			---			35.2
		Total assets measured at fair value on a nonrecurring basis	$	103.9		$	---		$	---		$	103.9

Investment_Tables

Investment (Tables)	9 Months Ended
	Sep. 30, 2014
Investments [Abstract]	'
Amortized Costs and Fair Values of Fixed Maturity Securities Available-for-Sale	'
			30-Sep-14
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
			(In millions)
	Corporate bonds		$	6,815.70		$	368.2		$	-34		$	7,149.90
	U.S. government and agency bonds			267.6			35.8			-0.2			303.2
	U.S. state and political subdivision bonds			126.6			10.1			-0.2			136.5
	Foreign government bonds			58.5			6.5			---			65
		Total fixed maturity securities	$	7,268.40		$	420.6		$	-34.4		$	7,654.60
			31-Dec-13
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
			(In millions)
	Corporate bonds		$	6,282.10		$	339.6		$	-76		$	6,545.70
	U.S. government and agency bonds			320.8			32.8			-0.4			353.2
	U.S. state and political subdivision bonds			134.3			6.8			-0.8			140.3
	Foreign government bonds			58.9			6.6			---			65.5
	S&P 500 Index options			15.8			---			---			15.8
		Total fixed maturity securities	$	6,811.90		$	385.8		$	-77.2		$	7,120.50
Schedule of Contractual Maturities of Fixed Maturity Securities Available-for-Sale	'
			30-Sep-14						31-Dec-13
			Amortized			Fair			Amortized			Fair
			Cost			Value			Cost			Value
			(In millions)
	Due in one year or less		$	637		$	646.8		$	486.2		$	495.1
	Due after one year through five years			3,150.70			3,326.40			2,974.50			3,168.90
	Due after five years through ten years			2,633.10			2,702.30			2,497.50			2,524.60
	Due after ten years			847.6			979.1			853.7			931.9
		Total fixed maturity securities	$	7,268.40		$	7,654.60		$	6,811.90		$	7,120.50
Schedule of Gross Unrealized Losses and Fair Value of Investments	'
					30-Sep-14
					Total						Less than 12 months						12 or more months
					Number			Amount			Number			Amount			Number			Amount
					(Dollars in millions)
	Unrealized losses:
			Corporate bonds			964		$	34			632		$	12.2			332		$	21.8
			U.S. government and agency bonds			7			0.2			2			0.1			5			0.1
			U.S. state and political subdivision bonds			4			0.2			---			---			4			0.2
				Total		975		$	34.4			634		$	12.3			341		$	22.1
	Fair value of securities with unrealized losses:
			Corporate bonds			964		$	1,734.80			632		$	1,118.20			332		$	616.6
			U.S. government and agency bonds			7			12.1			2			5.5			5			6.6
			U.S. state and political subdivision bonds			4			6.8			---			---			4			6.8
				Total		975		$	1,753.70			634		$	1,123.70			341		$	630
					31-Dec-13
					Total						Less than 12 months						12 or more months
					Number			Amount			Number			Amount			Number			Amount
					(Dollars in millions)
	Unrealized losses:
			Corporate bonds			908		$	76			848		$	66.3			60		$	9.7
			U.S. government and agency bonds			9			0.4			9			0.4			---			---
			U.S. state and political subdivision bonds			10			0.8			10			0.8			---			---
				Total		927		$	77.2			867		$	67.5			60		$	9.7
	Fair value of securities with unrealized losses:
			Corporate bonds			908		$	1,663.80			848		$	1,557.70			60		$	106.1
			U.S. government and agency bonds			9			16.9			9			16.9			---			---
			U.S. state and political subdivision bonds			10			15.4			10			15.4			---			---
				Total		927		$	1,696.10			867		$	1,590.00			60		$	106.1
Commercial Mortgage Loan Portfolio by Property Type, by Geographic Region within the U.S. and by U.S. State	'
				30-Sep-14						31-Dec-13
				Amount			Percent			Amount			Percent
				(Dollars in millions)
	Property type:
		Retail		$	2,645.00		49.5	%		$	2,629.20		48.6	%
		Industrial			1,005.90		18.8				1,008.70		18.7
		Office			997.9		18.7				982.4		18.2
		Apartment and other			302		5.6				289.9		5.4
		Hotel/motel			175.1		3.3				276.3		5.1
		Commercial			216.7		4.1				218.6		4
			Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
	Geographic region*:
		Pacific		$	1,915.60		35.9	%		$	1,910.10		35.3	%
		South Atlantic			1,063.20		19.9				1,090.00		20.2
		West South Central			674		12.6				672.8		12.4
		Mountain			599.1		11.2				611.4		11.3
		East North Central			474.8		8.9				473.8		8.8
		Middle Atlantic			223.4		4.2				223		4.1
		West North Central			149.8		2.8				186.9		3.5
		East South Central			184.6		3.4				166.6		3.1
		New England			58.1		1.1				70.5		1.3
			Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
	U.S. state:
		California		$	1,443.10		27	%		$	1,455.50		26.9	%
		Texas			620.2		11.6				618.8		11.5
		Florida			315.4		5.9				331.6		6.1
		Georgia			308.1		5.8				310.7		5.8
		Other states			2,655.80		49.7				2,688.50		49.7
			Total commercial mortgage loans, net	$	5,342.60		100	%		$	5,405.10		100	%
Changes in Commercial Mortgage Loan Loss Allowance	'
					Three Months Ended						Nine Months Ended
					September 30,						September 30,
					2014			2013			2014			2013
					(In millions)
	Commercial mortgage loan loss allowance:
		Beginning balance			$	44.4		$	46.8		$	43.6		$	46.6
			Provision			5.9			3.8			8.1			12.8
			Charge-offs			-8.8			-4			-10.2			-12.8
				Ending balance	$	41.5		$	46.6		$	41.5		$	46.6
		Specific loan loss allowance			$	24.6		$	28.2		$	24.6		$	28.2
		General loan loss allowance				16.9			18.4			16.9			18.4
				Total commercial mortgage loan loss allowance	$	41.5		$	46.6		$	41.5		$	46.6
Schedule of Recorded Investment in Commercial Mortgage Loans	'
			30-Sep-14			31-Dec-13
			(In millions)
	Commercial mortgage loans collectively evaluated for impairment		$	5,285.50		$	5,334.40
	Commercial mortgage loans individually evaluated for impairment			98.6			114.3
	Commercial mortgage loan loss allowance			-41.5			-43.6
		Total commercial mortgage loans, net	$	5,342.60		$	5,405.10
Performing and Nonperforming Commercial Mortgage Loans by Property Type	'
			30-Sep-14
												Apartment			Hotel/
			Retail			Industrial			Office			and Other			Motel			Commercial			Total
			(In millions)
	Performing commercial mortgage loans		$	2,639.80		$	1,005.10		$	995.4		$	302		$	175.1		$	216.7		$	5,334.10
	Nonperforming commercial mortgage loans			5.2			0.8			2.5			---			---			---			8.5
		Total commercial mortgage loans	$	2,645.00		$	1,005.90		$	997.9		$	302		$	175.1		$	216.7		$	5,342.60
			31-Dec-13
												Apartment			Hotel/
			Retail			Industrial			Office			and Other			Motel			Commercial			Total
			(In millions)
	Performing commercial mortgage loans		$	2,624.20		$	1,004.60		$	979.6		$	289.9		$	276.3		$	218.6		$	5,393.20
	Nonperforming commercial mortgage loans			5			4.1			2.8			---			---			---			11.9
		Total commercial mortgage loans	$	2,629.20		$	1,008.70		$	982.4		$	289.9		$	276.3		$	218.6		$	5,405.10
Impaired Commercial Mortgage Loans Identified in Management's Specific Review of Probable Loan Losses and the Related Allowance	'
	The following tables set forth impaired commercial mortgage loans identified in management’s specific review of probable loan losses and the related allowance:
							30-Sep-14
										Unpaid						Amount on
							Recorded			Principal			Related			Nonaccrual
							Investment			Balance			Allowance			Status
							(In millions)
	Impaired commercial mortgage loans:
		Without specific loan loss allowances:
			Retail				$	12.8		$	12.8		$	---		$	1.8
			Office					3			3			---			1.5
			Industrial					0.9			0.9			---			---
			Commercial					1.8			1.8			---			---
			Apartment and other					2.8			2.8			---			---
				Total impaired commercial mortgage loans without specific
					loan loss allowances			21.3			21.3			---			3.3
		With specific loan loss allowances:
			Retail					54.5			54.5			13.2			6.1
			Office					9.6			9.6			3.2			1
			Industrial					5			5			2.4			0.1
			Commercial					7.9			7.9			5.8			1
			Apartment and other					0.3			0.3			---			---
				Total impaired commercial mortgage loans with specific
					loan loss allowances			77.3			77.3			24.6			8.2
						Total impaired commercial mortgage loans	$	98.6		$	98.6		$	24.6		$	11.5
							31-Dec-13
										Unpaid						Amount on
							Recorded			Principal			Related			Nonaccrual
							Investment			Balance			Allowance			Status
							(In millions)
	Impaired commercial mortgage loans:
		Without specific loan loss allowances:
			Retail				$	16.1		$	16.1		$	---		$	7.6
			Office					3.9			3.9			---			1.5
			Industrial					1			1			---			---
			Commercial					1.8			1.8			---			---
			Apartment and other					3.8			3.8			---			---
				Total impaired commercial mortgage loans without specific
					loan loss allowances			26.6			26.6			---			9.1
		With specific loan loss allowances:
			Retail					58.5			58.5			16.1			21.6
			Office					9.7			9.7			3.8			0.9
			Industrial					12.6			12.6			2.4			1.4
			Commercial					6			6			3.6			2.5
			Apartment and other					0.9			0.9			---			---
				Total impaired commercial mortgage loans with specific
					loan loss allowances			87.7			87.7			25.9			26.4
						Total impaired commercial mortgage loans	$	114.3		$	114.3		$	25.9		$	35.5
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	'
					Three Months Ended									Nine Months Ended
					30-Sep-14									30-Sep-14
								Pre-			Post-						Pre-			Post-
								Restructuring			Restructuring						Restructuring			Restructuring
					Number			Recorded			Recorded			Number			Recorded			Recorded
					of Loans			Investment			Investment			of Loans			Investment			Investment
					(Dollars in millions)
	Troubled debt restructurings:
		Retail				33		$	27.5		$	24.9			34		$	28.3		$	25.6
		Office				1			0.7			0.7			1			0.7			0.7
		Industrial				1			0.4			0.4			3			2.1			2.3
		Commercial				---			---			---			1			2.7			2.7
			Total troubled debt restructurings			35		$	28.6		$	26			39		$	33.8		$	31.3
					Three Months Ended									Nine Months Ended
					30-Sep-13									30-Sep-13
								Pre-			Post-						Pre-			Post-
								Restructuring			Restructuring						Restructuring			Restructuring
					Number			Recorded			Recorded			Number			Recorded			Recorded
					of Loans			Investment			Investment			of Loans			Investment			Investment
					(Dollars in millions)
	Troubled debt restructurings:
		Retail				10		$	15.5		$	13.2			16		$	20		$	20.8
		Office				---			---			---			3			1.6			1.6
		Industrial				2			2.2			2.3			2			2.2			2.3
		Commercial				---			---			---			1			0.9			0.9
			Total troubled debt restructurings			12		$	17.7		$	15.5			22		$	24.7		$	25.6
Average Recorded Investment in Impaired Commercial Mortgage Loans before Specific Allowances for Losses	'
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
	Average recorded investment	$	100.5		$	127.5		$	105.5		$	113.2
Aging of Commercial Mortgage Loans by Property Type	'
				30-Sep-14
																						Total
										Greater Than						Allowance						Commercial
				30 Days			60 Days			90 Days			Total			Related			Current,			Mortgage
				Past Due			Past Due			Past Due			Past Due			to Past Due			Net			Loans
				(In millions)
	Commercial mortgage loans:
		Retail		$	1.1		$	---		$	6.7		$	7.8		$	-1.5		$	2,638.70		$	2,645.00
		Industrial			---			---			1.1			1.1			-0.2			1,005.00			1,005.90
		Office			---			---			2.8			2.8			-0.4			995.5			997.9
		Apartment and other			---			---			---			---			---			302			302
		Hotel/motel			---			---			---			---			---			175.1			175.1
		Commercial			---			---			---			---			---			216.7			216.7
			Total commercial mortgage loans	$	1.1		$	---		$	10.6		$	11.7		$	-2.1		$	5,333.00		$	5,342.60
				31-Dec-13
																						Total
										Greater Than						Allowance						Commercial
				30 Days			60 Days			90 Days			Total			Related			Current,			Mortgage
				Past Due			Past Due			Past Due			Past Due			to Past Due			Net			Loans
				(In millions)
	Commercial mortgage loans:
		Retail		$	2.8		$	0.3		$	6.1		$	9.2		$	-1.5		$	2,621.50		$	2,629.20
		Industrial			---			3.3			1.8			5.1			-0.9			1,004.50			1,008.70
		Office			1.3			---			3.7			5			-0.9			978.3			982.4
		Apartment and other			---			---			---			---			---			289.9			289.9
		Hotel/motel			6.3			---			---			6.3			---			270			276.3
		Commercial			---			---			---			---			---			218.6			218.6
			Total commercial mortgage loans	$	10.4		$	3.6		$	11.6		$	25.6		$	-3.3		$	5,382.80		$	5,405.10
Net Investment Income Summarized by Investment Type	'
						Three Months Ended						Nine Months Ended
						September 30,						September 30,
						2014			2013			2014			2013
						(In millions)
	Fixed maturity securities					$	73.4		$	75.8		$	221		$	228.5
	Commercial mortgage loans						83.1			84.9			250.1			252.2
	Real estate						0.5			-0.3			0.7			-0.9
	S&P 500 Index options						0.9			2.5			5.3			9.7
	Other						---			2.2			4.4			7
				Gross investment income			157.9			165.1			481.5			496.5
	Investment expenses						-4.5			-5.9			-17.9			-17.2
	Tax-advantaged investment operating losses						-6.3			-3.4			-16.1			-10.2
					Net investment income	$	147.1		$	155.8		$	447.5		$	469.1
Schedule of Gross Capital Gains and Losses by Investment Type	'
					Three Months Ended						Nine Months Ended
					September 30,						September 30,
					2014			2013			2014			2013
					(In millions)
	Gains:
		Fixed maturity securities			$	1.4		$	0.6		$	4.8		$	8.2
		Commercial mortgage loans				0.8			0.8			1.8			1.8
		Real Estate				0.8			0.4			1.9			0.7
		Other				0.2			---			0.2			0.2
			Gross capital gains			3.2			1.8			8.7			10.9
	Losses:
		Fixed maturity securities				-0.4			-1.1			-1.5			-2.1
		Provision for commercial mortgage loan losses				-5.9			-3.8			-8.1			-12.8
		Real Estate				-1.7			-5.6			-3.4			-7
		Other				-0.4			---			-2.5			-1.9
			Gross capital losses			-8.4			-10.5			-15.5			-23.8
				Net capital losses	$	-5.2		$	-8.7		$	-6.8		$	-12.9

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Financial Instruments [Abstract]	'
Fair Value of the Company's Derivative Assets and Liabilities	'
				September 30,						December 31,
				2014						2013
				Notional			Fair			Notional			Fair
				Amount			Value			Amount			Value
				(In millions)
	Qualifying Fair Value Hedging Instruments
	Assets:
		Other invested assets:
			Interest rate swaps	$	350		$	0.7		$	---		$	---
	Non-Qualifying Hedging Instruments
	Assets:
		Other invested assets:
			S&P 500 Index options		375.4			12.8			350.5			15.8
	Liabilities:
		Other policyholder funds:
			Index-based interest guarantees		-1			69.4			-1			67.6
Derivative Offsetting and Collateral	'
				September 30,			December 31,
				2014			2013
				(In millions)
	Offsetting of Interest Rate Swaps
	Interest rate swaps, liabilities			$	-0.6		$	---
	Interest rate swaps, assets				1.3			---
		Net interest rate swaps			0.7			---
		Accrued interest payable			-1.8			---
		Collateral pledged			6.2			---
			Net amount	$	5.1		$	---
Gain or Loss Recognized in Earnings from the Change in Fair Value of Derivative Assets and Liabilities	'
					Three Months Ended						Nine Months Ended
					September 30,						September 30,
					2014			2013			2014			2013
					(In millions)
	Qualifying Fair Value Hedging Instruments
	Net capital gains:
		Interest rate swaps			$	2.3		$	---		$	0.7		$	---
	Non-Qualifying Hedging Instruments
	Net investment income:
		S&P 500 Index options				0.9			2.5			5.3			9.7
	Interest credited:
		Index-based interest guarantees				0.5			-1.6			-3.5			-6.1
				Net gains	$	3.7		$	0.9		$	2.5		$	3.6
Fair Value of Derivative Assets and Maximum Credit Risk Exposure	'
				30-Sep-14
				Assets at			Maximum
				Fair Value			Credit Risk
				(In millions)
	Counterparty:
		The Bank of New York Mellon		$	6.7		$	9
		Goldman Sachs			4.6			6.4
		Merrill Lynch International			1.5			3.1
			Total	$	12.8		$	18.5

Deferred_Acquisition_Costs_DAC1

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Deferred Acquisition Costs, Value Of Business Acquired And Other Intangible Assets Disclosures [Abstract]	'
Schedule Of Activity For DAC, VOBA And Other Intangible Assets	'
				Nine Months Ended			Year Ended
				30-Sep-14			31-Dec-13
				(In millions)
	Carrying value at beginning of period, net:
		DAC		$	319.1		$	284.9
		VOBA			20.1			23.4
		Other intangible assets			32.1			38.2
			Total balance at beginning of period, net		371.3			346.5
	Deferred or acquired during period:
		DAC			58.9			76.9
			Total deferred or acquired during period		58.9			76.9
	Amortized during period:
		DAC			-48			-42.7
		VOBA			-1.6			-3.3
		Other intangible assets			-4.4			-6.1
			Total amortized during period		-54			-52.1
	Carrying value at end of period, net:
		DAC			330			319.1
		VOBA			18.5			20.1
		Other intangible assets			27.7			32.1
			Total carrying value at end of period, net	$	376.2		$	371.3
Schedule Of DAC And VOBA Balances Amortized In Proportion To Expected Gross Profits And The Percentage Of The Total Balance Of DAC And VOBA Amortized In Proportion To Expected Gross Profits	'
		30-Sep-14						31-Dec-13
		Amount			Percent			Amount		Percent
		(Dollars in millions)
	DAC	$	79.2		24	%		$	80.1	25.1	%
	VOBA		3.9		21.1				4.3	21.4
Impact Of Unlocking On DAC And VOBA Balances	'
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014		2013
		(In millions)
	(Decrease) increase to DAC and VOBA	$	-1.1		$	0.3		$	-1.9	$	-0.9
Schedule Of The Estimated Net Amortization Of Value Of Business Acquired And Other Intangible Assets For The Next Five Years	'
		Amount
		(In millions)
	2014	$	1.9
	2015		6.9
	2016		5.6
	2017		4.2
	2018		4.2
	2019		4

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Combined Federal And State Effective Income Tax Rates Table Textblock	'
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Combined federal and state effective income tax rates	26.6	%	27.9	%	23.6	%	25.9	%

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2014
AOCI, net of tax [Abstract]	'
Schedule Of Accumulated Other Comprehensive Income [Table Text Block]	'
				Net Unrealized				Total
				Gains (Losses) on				Accumulated
				Fixed Maturity		Employee		Other
				Securities		Benefit		Comprehensive
				Available-for-Sale		Plans		Income (Loss)
				(In millions)
	Balance, January 1, 2013			$	383	$	-73.7	$	309.3
		Other comprehensive (loss) income, net of tax
			before reclassification adjustment(1)		-205.3		41.2		-164.1
		Amounts reclassified from accumulated
			other comprehensive income, net of tax(2)		-4.5		-6		-10.5
	Net other comprehensive (loss) income, net of tax				-209.8		35.2		-174.6
	Balance, December 31, 2013				173.2		-38.5		134.7
		Other comprehensive income (loss), net of tax
			before reclassification adjustment(3)		55.3		-0.4		54.9
		Amounts reclassified from accumulated
			other comprehensive (loss) income, net of tax(4)		-2.1		1.2		-0.9
	Net other comprehensive income, net of tax				53.2		0.8		54
	Balance, September 30, 2014			$	226.4	$	-37.7	$	188.7
	(1) Net of tax benefit of $111.1 million for net unrealized losses on fixed maturity securities and net of tax expense of $22.2 million for employee benefits.
	(2) Net of tax benefits of $3.1 million for net unrealized gains on fixed maturity securities and $3.2 million for employee benefits, respectively.
	(3) Net of tax expense of $27.2 million for net unrealized gains on fixed maturity securities and net of tax benefit of $0.3 million for employee benefits.
	(4) Net of tax benefit of $1.1 million for net unrealized gains on fixed maturity securities and net of tax expense of $0.7 million for employee benefits.

Organization_Principles_Of_Con1

Organization, Principles Of Consolidation And Basis Of Presentation (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Organization, Principles Of Consolidation And Basis Of Presentation [Abstract]	'	'
Total investment in tax advantaged investments	$262.10	$192.40

Net_Income_Per_Common_Share_De

Net Income Per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Net Income Per Common Share [Abstract]	'	'	'	'	'
Net income	$71.10	$59	$163.10	$163.50	$228.50
Basic weighted-average common shares outstanding	42,777,337	44,271,160	43,324,269	44,307,863	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Diluted weighted-average common shares outstanding	43,184,170	44,610,358	43,736,832	44,514,600	'
Net income per basic common share	$1.66	$1.33	$3.76	$3.69	'
Net income per diluted common share	$1.65	$1.32	$3.73	$3.67	'
Antidilutive shares not included in net income per diluted common share calculation	150,475	0	54,986	559,575	'
Employee Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Dilutive shares from share based compensation	362,634	273,338	372,615	146,247	'
Stock Award Grants [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Dilutive shares from share based compensation	44,199	65,860	39,948	60,490	'

ShareBased_Compensation_Narrat

Share-Based Compensation (Narrative-Options) (Details) (Stock Incentive 2002 Plan [Member], USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of shares of common stock authorized for share based compensation arrangements	7,000,000	'
Number of shares of common stock available for grant	2,615,674	'
Employee Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Award vesting period	'4 years 0 months 0 days	'
Compensation cost related to unvested option, not recognized	$5.90	'
Weighted average recognition period of unrecognized compensation cost for stock options	'2 years 1 month 6 days	'
Stock option awards granted in period	111,810	164,367
Weighted average exercise price of stock option awards granted in period	$63.69	$38.65
Weighted average grant date fair value of stock option awards granted in period	$24.49	$13.69

ShareBased_Compensation_Narrat1

Share-Based Compensation (Narrative-Stock Awards) (Details) (Stock Incentive 2002 Plan [Member], USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of shares of common stock authorized for share based compensation arrangements	7,000,000	'
Number of shares of common stock available for grant	2,615,674	'
Stock Award Grants [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of shares of common stock authorized for share based compensation arrangements	1,400,000	'
Number of shares of common stock available for grant	957,543	'
RSUs Member	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$3,300,000	'
Award vesting period	'3 years 0 months 0 days	'
Stock awards granted during period	47,882	59,823
Weighted average recognition period of additional compensation cost assuming a target payout, years	'1 year 8 months 12 days	'
Performance Shares [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Award vesting period	'3 years 0 months 0 days	'
Stock awards granted during period	77,634	117,172
Issued under share-based compensation plans net, shares	8,846	0
Additional compensation cost assuming maximum payout of outstanding performance-based stock awards	14,200,000	'
Additional compensation cost assuming a target payout of outstanding performance-based stock awards	5,700,000	'
Weighted average recognition period of additional compensation cost assuming a target payout, years	'1 year 1 month 6 days	'
Director Stock Grants [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Award vesting period	'1 year 0 months 0 days	'
Issued under share-based compensation plans net, shares	15,697	20,099
Non-employee director annual compensation in common stock, fair value	$100,000	'

ShareBased_Compensation_Narrat2

Share-Based Compensation (Narratvie-ESPP) (Details) (Amended Employee Stock Purchase 1999 Plan [Member], USD $)	9 Months Ended
	Sep. 30, 2014
Amended Employee Stock Purchase 1999 Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Discount rate for employee stock purchase plan	5.00%
Employee share purchase plan offering period, months	'0 years 6 months 0 days
Maximum employee gross compensation withheld to purchase common stock	5.00%
Maximum fair value of common stock purchased by employee each calendar year	$25,000
Maxium dollar contribution to ESPP	$5,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	3,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,378,369

ShareBased_Compensation_Schedu

Share-Based Compensation (Schedule Of Compensation Cost And Related Income Tax Benefit Under Share-Based Compensation Plans) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-Based Compensation	'	'	'	'
Compensation cost	$1.80	$3.20	$4.90	$5.90
Related income tax benefit	$0.60	$1.20	$1.70	$2.10

ShareBased_Compensation_Schedu1

Share-Based Compensation (Schedule Of Compensation Cost And Related Income Tax Benefit Under Employee Stock Purchase Plan) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Compensation cost	$1.80	$3.20	$4.90	$5.90
Related income tax benefit	0.6	1.2	1.7	2.1
Employee Stock Purchase 1999 Plan [Member]	'	'	'	'
Compensation cost	0	0.1	0.2	0.3
Related income tax benefit	$0	$0	$0.10	$0.10

Retirement_Benefits_Narrative_

Retirement Benefits (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Operating expenses	$119.90	$114.80	$348.30	$324.30	'
Supplemental Employee Retirement Plans, Defined Benefit [Member]	'	'	'	'	'
Expenses towards non-qualified supplemental retirement plan	1	0.7	2.9	2.3	'
Other liabilities for non-qualified plan	31.8	'	31.8	'	31.1
Deferred Compensation Plans [Member]	'	'	'	'	'
Employer contributions to the deferred compensation plans	2.6	2.3	8.6	7.9	'
Liability for the plans	12.4	'	12.4	'	11.6
Deferred Compensation Plans [Member] | Supplemental Employee Retirement Plans, Defined Benefit [Member]	'	'	'	'	'
Accumulated other comprehensive loss net of tax	$5	'	$5	'	$5.70

Retirement_Benefits_Components

Retirement Benefits (Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income For Pension Benefits) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Pension Plans [Member]	'	'	'	'
Service cost	$2.20	$2.60	$6.60	$7.70
Interest cost	4.8	4.1	14.4	12.4
Expected return on plan assets	-8.4	-7.4	-25.1	-22
Amortization of prior service cost	0.2	0.2	0.5	0.5
Amortization of net actuarial gain (loss)	0.1	2.3	0.3	7
Net periodic benefit cost	-1.1	1.8	-3.3	5.6
Amortization of prior service cost	-0.2	-0.2	-0.5	-0.5
Amortization of net actuarial gain (loss)	-0.1	-2.3	-0.3	-7
Total recognized in other comprehensive income	-0.3	-2.5	-0.8	-7.5
Total recognized in net periodic benefit cost and other comprehensive income (loss)	-1.4	-0.7	-4.1	-1.9
Other Postretirement Benefit Plans Defined Benefit [Member]	'	'	'	'
Service cost	0	0.1	0	0.1
Interest cost	0.2	0.3	0.6	0.7
Expected return on plan assets	-0.2	-0.3	-0.6	-0.7
Amortization of prior service cost	0	0	0	-26.4
Amortization of net actuarial gain (loss)	0	0	-0.6	5.8
Net periodic benefit cost	0	0.1	-0.6	-20.5
Amortization of prior service cost	0	0	0	26.4
Amortization of net actuarial gain (loss)	0	0	0.6	-5.8
Total recognized in other comprehensive income	0	0	0.6	20.6
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$0	$0.10	$0	$0.10

Segments_Intersegment_Administ

Segments (Intersegment Administrative Fee Revenues) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Administrative fees	$32.80	$30.50	$97	$89.60
IntersegmentEliminationMember	'	'	'	'
Administrative fees	$4.90	$4.70	$14.50	$14

Segments_Premiums_Administrati

Segments (Premiums, Administrative Fees And Net Investment Income By Major Product Line Or Category) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Premiums	$507.30	$524.40	$1,536.60	$1,595.70
Administrative fees	32.8	30.5	97	89.6
Net investment income	147.1	155.8	447.5	469.1
Insurance Services [Member]	'	'	'	'
Premiums	504.2	523	1,527.90	1,589.90
Administrative fees	3.8	3.9	12.3	10.9
Net investment income	73.7	79	224.3	240.9
Employee Benefits [Member]	'	'	'	'
Premiums	453.9	474.7	1,380.60	1,447.90
Administrative fees	3.8	3.8	12.2	10.7
Net investment income	60.7	65.8	185.2	201.4
Employee Benefits [Member] | Group Insurance [Member]	'	'	'	'
Premiums	453.9	474.7	1,380.60	1,447.90
Employee Benefits [Member] | Group Life And ADD [Member]	'	'	'	'
Premiums	202	210.4	605.1	640.3
Employee Benefits [Member] | Group Long Term Disability [Member]	'	'	'	'
Premiums	187.1	191.3	565.7	589.6
Employee Benefits [Member] | Group Short Term Disability [Member]	'	'	'	'
Premiums	55.2	56.4	167	171.9
Employee Benefits [Member] | Group Other [Member]	'	'	'	'
Premiums	19.9	19.8	58.5	58.1
Employee Benefits [Member] | Experience Rated Refunds [Member]	'	'	'	'
Premiums	-10.3	-3.2	-15.7	-12
Individual Disability [Member]	'	'	'	'
Premiums	50.3	48.3	147.3	142
Administrative fees	0	0.1	0.1	0.2
Net investment income	13	13.2	39.1	39.5
Individual Disability [Member] | Individual Disability Insurance Policies [Member]	'	'	'	'
Premiums	50.3	48.3	147.3	142
Asset Management Segment [Member]	'	'	'	'
Premiums	3.1	1.4	8.7	5.8
Administrative fees	33.9	31.3	99.2	92.7
Net investment income	69.4	73.4	211.1	217.4
Asset Management Segment [Member] | Retirement Plans [Member]	'	'	'	'
Premiums	0.5	0.3	1.7	1.7
Administrative fees	25.5	23.5	74.2	69.3
Net investment income	28.1	26.2	83.9	75.4
Asset Management Segment [Member] | Individual Annuities [Member]	'	'	'	'
Premiums	2.6	1.1	7	4.1
Net investment income	37.2	43.4	116.9	131.6
Asset Management Segment [Member] | Other Financial Services Businesses [Member]	'	'	'	'
Administrative fees	8.4	7.8	25	23.4
Net investment income	4.1	3.8	10.3	10.4
Other Category [Member]	'	'	'	'
Premiums	0	0	0	0
Administrative fees	-4.9	-4.7	-14.5	-14
Net investment income	$4	$3.40	$12.10	$10.80

Segments_PTOI_and_Assets_Addit

Segments (PTOI and Assets Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Revenue Reconciling Item [Line Items]	'	'	'	'	'
Income (loss) before income taxes	$96.90	$81.80	$213.60	$220.60	'
Total Assets	22,438.70	20,926.30	22,438.70	20,926.30	21,393.30
Insurance Services [Member]	'	'	'	'	'
Segment Reporting Revenue Reconciling Item [Line Items]	'	'	'	'	'
Income (loss) before income taxes	89.3	78.3	185.7	188.5	'
Total Assets	8,089.80	8,174.50	8,089.80	8,174.50	'
Asset Management Segment [Member]	'	'	'	'	'
Segment Reporting Revenue Reconciling Item [Line Items]	'	'	'	'	'
Income (loss) before income taxes	20.8	21.9	59.2	59.8	'
Total Assets	13,775.60	12,224.70	13,775.60	12,224.70	'
Other Category [Member]	'	'	'	'	'
Segment Reporting Revenue Reconciling Item [Line Items]	'	'	'	'	'
Income (loss) before income taxes	-13.2	-18.4	-31.3	-27.7	'
Total Assets	$573.30	$527.10	$573.30	$527.10	'

Segments_Segment_Information_D

Segments (Segment Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Premiums	$507.30	$524.40	$1,536.60	$1,595.70	'
Administrative fees	32.8	30.5	97	89.6	'
Net investment income	147.1	155.8	447.5	469.1	'
Net capital gains (losses)	-5.2	-8.7	-6.8	-12.9	'
Total revenues	682	702	2,074.30	2,141.50	'
Benefits to policyholders	360.8	395	1,188.10	1,260.90	'
Interest credited	38.7	43.9	122.8	130.8	'
Operating expenses	119.9	114.8	348.3	324.3	'
Commissions and bonuses	53.2	51.9	154.7	156.5	'
Premium taxes	7.5	9.1	24.7	27.7	'
Interest expense	7.8	8.6	24.1	25.7	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	-2.8	-3.1	-2	-5	'
Total benefits and expenses	585.1	620.2	1,860.70	1,920.90	'
Income (loss) before income taxes	96.9	81.8	213.6	220.6	'
Total Assets	22,438.70	20,926.30	22,438.70	20,926.30	21,393.30
Insurance Services [Member]	'	'	'	'	'
Premiums	504.2	523	1,527.90	1,589.90	'
Administrative fees	3.8	3.9	12.3	10.9	'
Net investment income	73.7	79	224.3	240.9	'
Net capital gains (losses)	'	0	0	0	'
Total revenues	581.7	605.9	1,764.50	1,841.70	'
Benefits to policyholders	355.2	391.2	1,172.60	1,247	'
Interest credited	0.7	0.6	2.6	2.8	'
Operating expenses	89.3	86.1	259	252.5	'
Commissions and bonuses	43.4	43.5	129.1	131.9	'
Premium taxes	7.5	9.1	24.7	27.7	'
Interest expense	0	0	0	'	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	-3.7	-2.9	-9.2	-8.7	'
Total benefits and expenses	492.4	527.6	1,578.80	1,653.20	'
Income (loss) before income taxes	89.3	78.3	185.7	188.5	'
Total Assets	8,089.80	8,174.50	8,089.80	8,174.50	'
Employee Benefits [Member]	'	'	'	'	'
Premiums	453.9	474.7	1,380.60	1,447.90	'
Administrative fees	3.8	3.8	12.2	10.7	'
Net investment income	60.7	65.8	185.2	201.4	'
Net capital gains (losses)	'	0	0	0	'
Total revenues	518.4	544.3	1,578	1,660	'
Benefits to policyholders	321.1	356	1,073.70	1,153.10	'
Interest credited	0.7	0.6	2.6	2.8	'
Operating expenses	82.2	79	238.3	232.8	'
Commissions and bonuses	30.5	30.4	93.5	96.5	'
Premium taxes	6.6	8.1	22	24.7	'
Interest expense	0	0	0	0	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	0.4	1.6	-0.3	0.9	'
Total benefits and expenses	441.5	475.7	1,429.80	1,510.80	'
Income (loss) before income taxes	76.9	68.6	148.2	149.2	'
Total Assets	5,740	5,805	5,740	5,805	'
Individual Disability [Member]	'	'	'	'	'
Premiums	50.3	48.3	147.3	142	'
Administrative fees	0	0.1	0.1	0.2	'
Net investment income	13	13.2	39.1	39.5	'
Net capital gains (losses)	'	0	0	0	'
Total revenues	63.3	61.6	186.5	181.7	'
Benefits to policyholders	34.1	35.2	98.9	93.9	'
Interest credited	0	0	0	0	'
Operating expenses	7.1	7.1	20.7	19.7	'
Commissions and bonuses	12.9	13.1	35.6	35.4	'
Premium taxes	0.9	1	2.7	3	'
Interest expense	0	0	0	0	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	-4.1	-4.5	-8.9	-9.6	'
Total benefits and expenses	50.9	51.9	149	142.4	'
Income (loss) before income taxes	12.4	9.7	37.5	39.3	'
Total Assets	2,349.80	2,369.50	2,349.80	2,369.50	'
Asset Management Segment [Member]	'	'	'	'	'
Premiums	3.1	1.4	8.7	5.8	'
Administrative fees	33.9	31.3	99.2	92.7	'
Net investment income	69.4	73.4	211.1	217.4	'
Net capital gains (losses)	'	0	0	0	'
Total revenues	106.4	106.1	319	315.9	'
Benefits to policyholders	5.6	3.8	15.5	13.9	'
Interest credited	38	43.3	120.2	128	'
Operating expenses	31.3	28.9	91.3	85.9	'
Commissions and bonuses	9.8	8.4	25.6	24.6	'
Premium taxes	0	0	0	0	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	0.9	-0.2	7.2	3.7	'
Total benefits and expenses	85.6	84.2	259.8	256.1	'
Income (loss) before income taxes	20.8	21.9	59.2	59.8	'
Total Assets	13,775.60	12,224.70	13,775.60	12,224.70	'
Other Category [Member]	'	'	'	'	'
Premiums	0	0	0	0	'
Administrative fees	-4.9	-4.7	-14.5	-14	'
Net investment income	4	3.4	12.1	10.8	'
Net capital gains (losses)	-5.2	-8.7	-6.8	-12.9	'
Total revenues	-6.1	-10	-9.2	-16.1	'
Benefits to policyholders	'	0	'	'	'
Interest credited	'	0	'	'	'
Operating expenses	-0.7	-0.2	-2	-14.1	'
Commissions and bonuses	'	0	'	'	'
Premium taxes	'	0	'	'	'
Interest expense	7.8	8.6	24.1	25.7	'
Net increase in deferred acquisition costs, value of business acquired and intangible assets	'	0	'	'	'
Total benefits and expenses	7.1	8.4	22.1	11.6	'
Income (loss) before income taxes	-13.2	-18.4	-31.3	-27.7	'
Total Assets	$573.30	$527.10	$573.30	$527.10	'

Fair_Value_Narrative_Details

Fair Value (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013
						Real Estate Owned [Member]	Real Estate Owned [Member]	Commercial Mortgage Loans [Member]	Commercial Mortgage Loans [Member]
Impact on interest credited during the period due to changes in Level 3 actuarial assumptions	($1,400,000)	$1,300,000	($2,700,000)	$2,700,000	'	'	'	'	'
Capital losses recorded during the period on real estate owned measured on a nonrecurring basis and still held	'	'	'	'	'	1,300,000	7,200,000	'	'
Impaired recorded investment, with related allowance	77,300,000	'	77,300,000	'	87,700,000	'	'	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	72,400,000	'	72,400,000	'	103,900,000	13,900,000	35,200,000	58,500,000	68,700,000
Related Allowance	$24,600,000	$28,200,000	$24,600,000	$28,200,000	$25,900,000	'	'	'	'

Fair_Value_Estimated_Fair_Valu

Fair Value (Estimated Fair Value And The Carrying Value Of Each Financial Instrument Categorized by Fair Value Hierarchy) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Total fixed maturity securities-available-for-sale	$7,654,600,000	$7,120,500,000
Commercial mortgage loans, net	5,342,600,000	5,405,100,000
Separate account assets	7,031,900,000	6,393,200,000
Other policyholder funds	6,372,200,000	6,051,600,000
Short-term debt	1,200,000	1,500,000
Long-term debt	503,700,000	551,900,000
Carrying (Reported) Amount, Fair Value Disclosure [Member]	'	'
Total fixed maturity securities-available-for-sale	7,654,600,000	7,120,500,000
Commercial mortgage loans, net	5,342,600,000	5,405,100,000
S and P Five Hundred Index Options	12,800,000	'
Interest Rate Swaps	-700,000	0
Policy loans	2,200,000	2,500,000
Separate account assets	7,031,900,000	6,393,200,000
Short-term debt	1,200,000	1,500,000
Long-term debt	503,700,000	551,900,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Corporate Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	7,149,900,000	6,545,700,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Government and Agency Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	303,200,000	353,200,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. State and Political Subdivision Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	136,500,000	140,300,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Foreign Government Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	65,000,000	65,500,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | S and P Five Hundred Index Options [Member]	'	'
Total fixed maturity securities-available-for-sale	'	15,800,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Index Based Interest Guarantees [Member]	'	'
Index-based interest guarantees	69,400,000	67,600,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Investment Type Contracts [Member]	'	'
Other policyholder funds	5,694,500,000	5,469,800,000
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Total fixed maturity securities-available-for-sale	7,654,600,000	7,120,500,000
Commercial mortgage loans, net	5,822,300,000	5,769,600,000
S and P Five Hundred Index Options	12,800,000	'
Interest Rate Swaps	-700,000	0
Policy loans	2,200,000	2,500,000
Separate account assets	7,031,900,000	6,393,200,000
Short-term debt	1,600,000	1,900,000
Long-term debt	537,200,000	553,600,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Commercial mortgage loans, net	0	0
S and P Five Hundred Index Options	0	'
Interest Rate Swaps	0	0
Policy loans	0	0
Separate account assets	6,907,000,000	6,249,200,000
Short-term debt	0	0
Long-term debt	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	7,573,100,000	6,988,700,000
Commercial mortgage loans, net	0	0
S and P Five Hundred Index Options	0	'
Interest Rate Swaps	-700,000	0
Policy loans	0	0
Separate account assets	124,900,000	144,000,000
Short-term debt	1,600,000	1,900,000
Long-term debt	537,200,000	553,600,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	81,500,000	131,800,000
Commercial mortgage loans, net	5,822,300,000	5,769,600,000
S and P Five Hundred Index Options	12,800,000	'
Interest Rate Swaps	0	0
Policy loans	2,200,000	2,500,000
Separate account assets	0	0
Short-term debt	0	0
Long-term debt	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	7,149,900,000	6,545,700,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Bonds [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Bonds [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	7,068,400,000	6,429,700,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Bonds [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	81,500,000	116,000,000
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Government and Agency Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	303,200,000	353,200,000
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Government and Agency Bonds [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Government and Agency Bonds [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	303,200,000	353,200,000
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Government and Agency Bonds [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. State and Political Subdivision Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	136,500,000	140,300,000
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. State and Political Subdivision Bonds [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. State and Political Subdivision Bonds [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	136,500,000	140,300,000
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. State and Political Subdivision Bonds [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Government Bonds [Member]	'	'
Total fixed maturity securities-available-for-sale	65,000,000	65,500,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Government Bonds [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Government Bonds [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	65,000,000	65,500,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Government Bonds [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | S and P Five Hundred Index Options [Member]	'	'
Total fixed maturity securities-available-for-sale	'	15,800,000
Estimate of Fair Value, Fair Value Disclosure [Member] | S and P Five Hundred Index Options [Member] | Level 1 [Member]	'	'
Total fixed maturity securities-available-for-sale	'	0
Estimate of Fair Value, Fair Value Disclosure [Member] | S and P Five Hundred Index Options [Member] | Level 2 [Member]	'	'
Total fixed maturity securities-available-for-sale	'	0
Estimate of Fair Value, Fair Value Disclosure [Member] | S and P Five Hundred Index Options [Member] | Level 3 [Member]	'	'
Total fixed maturity securities-available-for-sale	'	15,800,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Index Based Interest Guarantees [Member]	'	'
Index-based interest guarantees	69,400,000	67,600,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Index Based Interest Guarantees [Member] | Level 1 [Member]	'	'
Index-based interest guarantees	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Index Based Interest Guarantees [Member] | Level 2 [Member]	'	'
Index-based interest guarantees	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Index Based Interest Guarantees [Member] | Level 3 [Member]	'	'
Index-based interest guarantees	69,400,000	67,600,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Investment Type Contracts [Member]	'	'
Other policyholder funds	5,957,900,000	5,632,700,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Investment Type Contracts [Member] | Level 1 [Member]	'	'
Other policyholder funds	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Investment Type Contracts [Member] | Level 2 [Member]	'	'
Other policyholder funds	0	0
Estimate of Fair Value, Fair Value Disclosure [Member] | Investment Type Contracts [Member] | Level 3 [Member]	'	'
Other policyholder funds	$5,957,900,000	$5,632,700,000

Fair_Value_Significant_Unobser

Fair Value (Significant Unobservable Inputs Used in Level 3 Valuations of Assets and Liabilities) (Details) (USD $)	9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Fair Value Assets	$94.30		$131.80		$97.70	$79.30	$65.60	$94.50
S and P Five Hundred Index Options [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Fair Value Assets	12.8		15.8		14.4	14.1	13.7	11.3
FairValueMeasurementsSignificantAssumptions	'Various assumptions		'Various assumptions		'	'	'	'
FairValueMeasurementsValuationTechniques	'Black-Scholes option pricing model		'Black-Scholes option pricing model		'	'	'	'
S and P Five Hundred Index Options [Member] | Various Assumptions [Member] | Black-Scholes Option Pricing model [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'(a)		'(a)	[1]	'	'	'	'
Index Based Interest Guarantees [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Fair Value Liabilities	69.4		67.6		68.3	64.7	62.6	57.4
FairValueMeasurementsSignificantAssumptions	'Expected future, Various assumptions		'Expected future, Various assumptions		'	'	'	'
FairValueMeasurementsValuationTechniques	'Discounted cash , Black-Scholes option pricing model		'Discounted cash , Black-Scholes option pricing model		'	'	'	'
Index Based Interest Guarantees [Member] | Various Assumptions [Member] | Black-Scholes Option Pricing model [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'(a)	[1]	'(a)	[1]	'	'	'	'
Index Based Interest Guarantees [Member] | Various Assumptions [Member] | Discounted Cash flow [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'(b)	[2]	'(b)	[2]	'	'	'	'
Index Based Interest Guarantees [Member] | Various Assumptions [Member] | Discounted Cash flow [Member] | Maximum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'36%		'36%		'	'	'	'
Index Based Interest Guarantees [Member] | Various Assumptions [Member] | Discounted Cash flow [Member] | Minimum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'5%		'5%		'	'	'	'
Index Based Interest Guarantees [Member] | Expected Future Option Purchase [Member] | Discounted Cash flow [Member] | Maximum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'3%		'6%		'	'	'	'
Index Based Interest Guarantees [Member] | Expected Future Option Purchase [Member] | Discounted Cash flow [Member] | Minimum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'1%		'1%		'	'	'	'
Commercial Mortgage Loans [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Fair Value Assets	58.5		68.7		'	'	'	'
FairValueMeasurementsSignificantAssumptions	'Reduction on appraisal , Capitalization rate (c)	[3]	'Reduction on appraisal , Capitalization rate (c)	[3]	'	'	'	'
FairValueMeasurementsValuationTechniques	'Appraisals, Cash flows		'Appraisals, Cash flows		'	'	'	'
Commercial Mortgage Loans [Member] | Reduction On Appraisal [Member] | Appraisals [Member] | Maximum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'40%		'13%		'	'	'	'
Commercial Mortgage Loans [Member] | Reduction On Appraisal [Member] | Appraisals [Member] | Minimum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'0%		'0%		'	'	'	'
Commercial Mortgage Loans [Member] | Capitalization Rate [Member] | Cash Flows [Member] | Maximum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'16%		'16%		'	'	'	'
Commercial Mortgage Loans [Member] | Capitalization Rate [Member] | Cash Flows [Member] | Minimum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'7%		'7%		'	'	'	'
Real Estate Owned [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Fair Value Assets	$13.90		$35.20		'	'	'	'
FairValueMeasurementsSignificantAssumptions	'Reduction on appraisal		'Reduction on appraisal		'	'	'	'
FairValueMeasurementsValuationTechniques	'Appraisals		'Appraisals		'	'	'	'
Real Estate Owned [Member] | Reduction On Appraisal [Member] | Appraisals [Member] | Maximum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'11%		'53%		'	'	'	'
Real Estate Owned [Member] | Reduction On Appraisal [Member] | Appraisals [Member] | Minimum [Member]	'		'		'	'	'	'
Fair Value Measurement Inputs Disclosure [Line Items]	'		'		'	'	'	'
Unobservable Inputs	'0%		'0%		'	'	'	'
[1]	Represents various assumptions derived from market data, which include estimates of bid ask spreads and the implied volatilities for the S&P 500 Index.
[2]	Represents various actuarial assumptions which include combined lapse, mortality and withdrawal decrement rates which generally have a range of inputs from 5%-36% for both September 30,2014 and December 31, 2013.
[3]	Capitalization rates are used as an internal analysis in converting the underlying property income to an estimated property value.

Fair_Value_Assets_And_Liabilit

Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Level 3 Inputs) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Beginning Asset	$97.70	$65.60	$131.80	$94.50
Total Realized/Unrealized Gains (Losses) included in Net Income	0.9	2.5	5.3	9.7
Total Realized/Unrealized Gains (Losses) Included In Other Comprehensive Income (Loss)	-1.8	12.3	-3.9	7.2
Purchases	2.2	2.2	6.3	6.8
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	-4.7	-4.3	-14.6	-13.7
Transfers into Level 3	0	1.3	0	8.3
Transfers out of Level 3	0	-0.3	-30.6	-33.5
Ending Asset	94.3	79.3	94.3	79.3
U.S. Government and Agency Bonds [Member]	'	'	'	'
Beginning Asset	0	0	0	1.1
Total Realized/Unrealized Gains (Losses) included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included In Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	-1.1
Ending Asset	0	0	0	0
U.S. State and Political Subdivision Bonds [Member]	'	'	'	'
Beginning Asset	0	0	0	1.7
Total Realized/Unrealized Gains (Losses) included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included In Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	-1.7
Ending Asset	0	0	0	0
Corporate Bonds [Member]	'	'	'	'
Beginning Asset	83.3	51.9	116	80.4
Total Realized/Unrealized Gains (Losses) included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included In Other Comprehensive Income (Loss)	-1.8	12.3	-3.9	7.2
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	1.3	0	8.3
Transfers out of Level 3	0	-0.3	-30.6	-30.7
Ending Asset	81.5	65.2	81.5	65.2
S and P Five Hundred Index Options [Member]	'	'	'	'
Beginning Asset	14.4	13.7	15.8	11.3
Total Realized/Unrealized Gains (Losses) included in Net Income	0.9	2.5	5.3	9.7
Total Realized/Unrealized Gains (Losses) Included In Other Comprehensive Income (Loss)	0	0	0	0
Purchases	2.2	2.2	6.3	6.8
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	-4.7	-4.3	-14.6	-13.7
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Asset	12.8	14.1	12.8	14.1
Index Based Interest Guarantees [Member]	'	'	'	'
Beginning Liability	68.3	62.6	67.6	57.4
Total Realized/Unrealized Gains (Losses) Included in Net Income	-0.5	1.6	3.5	6.1
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Issuance	3.4	1.4	5.2	4.3
Sales	0	0	0	0
Settlements	-1.8	-0.9	-6.9	-3.1
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Liability	$69.40	$64.70	$69.40	$64.70

Fair_Value_Changes_In_Unrealiz

Fair Value (Changes In Unrealized Gains (Losses) Included In Net Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
S and P Five Hundred Index Options [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Changes in unrealized gains (losses) included in net income relating to asset positions still held	$0.70	$0.30	$3.30	$4.50
Index Based Interest Guarantees [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Changes in unrealized gains (losses) included in net income relating to liability positions still held	($0.80)	($2)	($7.90)	($7.30)

Fair_Value_Assets_Measured_At_

Fair Value (Assets Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	$72.40	$103.90
Level 1 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Level 2 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Level 3 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	72.4	103.9
Commercial Mortgage Loans [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	58.5	68.7
Commercial Mortgage Loans [Member] | Level 1 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Commercial Mortgage Loans [Member] | Level 2 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Commercial Mortgage Loans [Member] | Level 3 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	58.5	68.7
Real Estate Owned [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	13.9	35.2
Real Estate Owned [Member] | Level 1 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Real Estate Owned [Member] | Level 2 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Real Estate Owned [Member] | Level 3 [Member]	'	'
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	$13.90	$35.20

Investments_Narrative_Details

Investments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Investments [Line Items]	'	'	'	'	'
Callable bonds without a make-whole provision of fixed maturity available-for-sale securities, percentage	'	'	3.70%	'	'
Callable bonds without a make-whole provision of fixed maturity available-for-sale securities, amount	'	'	$280.10	'	'
Securities deposited for the benefit of policyholders in accordance with state regulations	7.3	'	7.3	'	7.4
Interest income recognized on impaired commercial mortgage loans	0.9	0.9	3.1	3.3	'
Cash received by the company as interest on impaired commercial mortgage loans	0.8	1	2.6	3	'
Commercial mortgage loans that were at least 60 days past due	10.6	'	10.6	'	15.2
60 day delinquency proportion of commercial mortgage loan portfolio	0.19%	'	0.19%	'	0.28%
Total fixed maturity securities-available-for-sale	7,654.60	'	7,654.60	'	7,120.50
Amount of Commercial Mortgage Loans Granted Forbearance	8.6	'	8.6	'	40.1
Amount of funding agreements from the Federal Home Loan Bank (FHLB).	102.1	'	102.1	'	'
Amount of the collateral pledged in support of federal home loan bank funding agreements outstanding.	$135.70	'	$135.70	'	'

Investments_Amortized_Costs_An

Investments (Amortized Costs And Fair Values Of Fixed Maturity Securities Available-For-Sale) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	$7,268,400,000	$6,811,900,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	420,600,000	385,800,000
Total fixed maturity securities-available-for-sale, Unrealized losses	-34,400,000	-77,200,000
Total fixed maturity securities-available-for-sale	7,654,600,000	7,120,500,000
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	7,654,600,000	7,120,500,000
U.S. Government and Agency Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	267,600,000	320,800,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	35,800,000	32,800,000
Total fixed maturity securities-available-for-sale, Unrealized losses	-200,000	-400,000
U.S. Government and Agency Bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	303,200,000	353,200,000
U.S. State and Political Subdivision Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	126,600,000	134,300,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	10,100,000	6,800,000
Total fixed maturity securities-available-for-sale, Unrealized losses	-200,000	-800,000
U.S. State and Political Subdivision Bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	136,500,000	140,300,000
Foreign Government Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	58,500,000	58,900,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	6,500,000	6,600,000
Total fixed maturity securities-available-for-sale, Unrealized losses	0	0
Foreign Government Bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	65,000,000	65,500,000
Corporate Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	6,815,700,000	6,282,100,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	368,200,000	339,600,000
Total fixed maturity securities-available-for-sale, Unrealized losses	-34,000,000	-76,000,000
Corporate Bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	7,149,900,000	6,545,700,000
S and P Five Hundred Index Options [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale, Amortized Cost	'	15,800,000
Total fixed maturity securities-available-for-sale, Unrealized Gains	'	0
Total fixed maturity securities-available-for-sale, Unrealized losses	'	0
S and P Five Hundred Index Options [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Schedule of Investments [Line Items]	'	'
Total fixed maturity securities-available-for-sale	'	$15,800,000

Investments_Schedule_Of_Contra

Investments (Schedule Of Contractual Maturities Of Fixed Maturity Securities Available-For-Sale) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Investments [Abstract]	'	'
Due in one year or less, Amortized cost	$637,000,000	$486,200,000
Due after one year through five years, Amortized cost	3,150,700,000	2,974,500,000
Due after five years through ten years, Amortized Cost	2,633,100,000	2,497,500,000
Due after ten years, Amortized Cost	847,600,000	853,700,000
Total fixed maturity securities-available-for-sale, Amortized Cost	7,268,400,000	6,811,900,000
Due in one year or less, Fair Value	646,800,000	495,100,000
Due after one year through five years, Fair Value	3,326,400,000	3,168,900,000
Due after five years through ten years, Fair Value	2,702,300,000	2,524,600,000
Due after ten years, Fair Value	979,100,000	931,900,000
Total fixed maturity securities-available-for-sale	$7,654,600,000	$7,120,500,000

Investments_Schedule_Of_Gross_

Investments (Schedule Of Gross Unrealized Losses And Fair Value Of Investments) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	NumberOfInvestments	NumberOfInvestments
Unrealized losses, Number	975	927
Unrealized losses	$34.40	$77.20
Unrealized losses, Less than 12 months, Number	634	867
Unrealized losses, Less than 12 months	12.3	67.5
Unrealized losses, 12 or more months, Number	341	60
Unrealized losses, 12 or more months	22.1	9.7
Fair market value of securities with unrealized losses, Number	975	927
Fair market value of securities with unrealized losses, Amount	1,753.70	1,696.10
Fair market value of securities with unrealized losses, Less than 12 months, Number	634	867
Fair market value of securities with unrealized losses, Less than 12 months, Amount	1,123.70	1,590
Fair market value of securities with unrealized losses, 12 or more months, Number	341	60
Fair market value of securities with unrealized losses, 12 or more months, Amount	630	106.1
U.S. Government and Agency Bonds [Member]	'	'
Unrealized losses, Number	7	9
Unrealized losses	0.2	0.4
Unrealized losses, Less than 12 months, Number	2	9
Unrealized losses, Less than 12 months	0.1	0.4
Unrealized losses, 12 or more months, Number	5	0
Unrealized losses, 12 or more months	0.1	0
Fair market value of securities with unrealized losses, Number	7	9
Fair market value of securities with unrealized losses, Amount	12.1	16.9
Fair market value of securities with unrealized losses, Less than 12 months, Number	2	9
Fair market value of securities with unrealized losses, Less than 12 months, Amount	5.5	16.9
Fair market value of securities with unrealized losses, 12 or more months, Number	5	0
Fair market value of securities with unrealized losses, 12 or more months, Amount	6.6	0
U.S. State and Political Subdivision Bonds [Member]	'	'
Unrealized losses, Number	4	10
Unrealized losses	0.2	0.8
Unrealized losses, Less than 12 months, Number	0	10
Unrealized losses, Less than 12 months	0	0.8
Unrealized losses, 12 or more months, Number	4	0
Unrealized losses, 12 or more months	0.2	0
Fair market value of securities with unrealized losses, Number	4	10
Fair market value of securities with unrealized losses, Amount	6.8	15.4
Fair market value of securities with unrealized losses, Less than 12 months, Number	0	10
Fair market value of securities with unrealized losses, Less than 12 months, Amount	0	15.4
Fair market value of securities with unrealized losses, 12 or more months, Number	4	0
Fair market value of securities with unrealized losses, 12 or more months, Amount	6.8	0
Corporate Bonds [Member]	'	'
Unrealized losses, Number	964	908
Unrealized losses	34	76
Unrealized losses, Less than 12 months, Number	632	848
Unrealized losses, Less than 12 months	12.2	66.3
Unrealized losses, 12 or more months, Number	332	60
Unrealized losses, 12 or more months	21.8	9.7
Fair market value of securities with unrealized losses, Number	964	908
Fair market value of securities with unrealized losses, Amount	1,734.80	1,663.80
Fair market value of securities with unrealized losses, Less than 12 months, Number	632	848
Fair market value of securities with unrealized losses, Less than 12 months, Amount	1,118.20	1,557.70
Fair market value of securities with unrealized losses, 12 or more months, Number	332	60
Fair market value of securities with unrealized losses, 12 or more months, Amount	$616.60	$106.10

Investments_Commercial_Mortgag

Investments (Commercial Mortgage Loan Portfolio By Property Type, By Geographic Region Within The U.S. And By U.S. State) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	$5,342.60	$5,405.10
Commercial mortgage loans, Percentage	100.00%	100.00%
California [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	1,443.10	1,455.50
Commercial mortgage loans, Percentage	27.00%	26.90%
Texas [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	620.2	618.8
Commercial mortgage loans, Percentage	11.60%	11.50%
Georgia [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	308.1	310.7
Commercial mortgage loans, Percentage	5.80%	5.80%
Florida [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	315.4	331.6
Commercial mortgage loans, Percentage	5.90%	6.10%
Other States [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	2,655.80	2,688.50
Commercial mortgage loans, Percentage	49.70%	49.70%
Pacific [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	1,915.60	1,910.10
Commercial mortgage loans, Percentage	35.90%	35.30%
South Atlantic [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	1,063.20	1,090
Commercial mortgage loans, Percentage	19.90%	20.20%
Mountain [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	599.1	611.4
Commercial mortgage loans, Percentage	11.20%	11.30%
West South Central [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	674	672.8
Commercial mortgage loans, Percentage	12.60%	12.40%
East North Central [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	474.8	473.8
Commercial mortgage loans, Percentage	8.90%	8.80%
Middle Atlantic [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	223.4	223
Commercial mortgage loans, Percentage	4.20%	4.10%
West North Central [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	149.8	186.9
Commercial mortgage loans, Percentage	2.80%	3.50%
East South Central [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	184.6	166.6
Commercial mortgage loans, Percentage	3.40%	3.10%
New England [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	58.1	70.5
Commercial mortgage loans, Percentage	1.10%	1.30%
Retail [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	2,645	2,629.20
Commercial mortgage loans, Percentage	49.50%	48.60%
Office [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	997.9	982.4
Commercial mortgage loans, Percentage	18.70%	18.20%
Industrial [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	1,005.90	1,008.70
Commercial mortgage loans, Percentage	18.80%	18.70%
Hotels and Motels [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	175.1	276.3
Commercial mortgage loans, Percentage	3.30%	5.10%
Commercial [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	216.7	218.6
Commercial mortgage loans, Percentage	4.10%	4.00%
Apartment and Other [Member]	'	'
Commercial Mortgage Loans [Line Items]	'	'
Commercial mortgage loans, net	$302	$289.90
Commercial mortgage loans, Percentage	5.60%	5.40%

Investments_Changes_In_Commerc

Investments (Changes In Commercial Mortgage Loan Loss Allowance) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Investments [Abstract]	'	'	'	'	'
Beginning balance	$44.40	$46.80	$43.60	$46.60	'
Provision	5.9	3.8	8.1	12.8	'
Charge-offs, net	-8.8	-4	-10.2	-12.8	'
Ending balance	41.5	46.6	41.5	46.6	'
Specific loan loss allowance	24.6	28.2	24.6	28.2	25.9
General loan loss allowance	16.9	18.4	16.9	18.4	'
Commercial mortgage loan loss allowance	$41.50	$46.60	$41.50	$46.60	'

Investments_Schedule_Of_Record

Investments (Schedule Of Recorded Investment In Commercial Mortgage Loans) (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Investments [Abstract]	'	'	'	'	'	'
Commercial mortgage loans collectively evaluated for impairment	$5,285.50	'	$5,334.40	'	'	'
Commercial mortgage loans individually evaluated for impairment	98.6	'	114.3	'	'	'
Commercial mortgage loan loss allowance	-41.5	-44.4	-43.6	-46.6	-46.8	-46.6
Total commercial mortgage loans	$5,342.60	'	$5,405.10	'	'	'

Investments_Performing_And_Non

Investments (Performing And Nonperforming Commercial Mortgage Loans By Property Type) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Commercial mortgage loans, net	$5,342.60	$5,405.10
Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	5,334.10	5,393.20
Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	8.5	11.9
Retail [Member]	'	'
Commercial mortgage loans, net	2,645	2,629.20
Retail [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	2,639.80	2,624.20
Retail [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	5.2	5
Office [Member]	'	'
Commercial mortgage loans, net	997.9	982.4
Office [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	995.4	979.6
Office [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	2.5	2.8
Industrial [Member]	'	'
Commercial mortgage loans, net	1,005.90	1,008.70
Industrial [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	1,005.10	1,004.60
Industrial [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	0.8	4.1
Hotels and Motels [Member]	'	'
Commercial mortgage loans, net	175.1	276.3
Hotels and Motels [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	175.1	276.3
Hotels and Motels [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	0	0
Commercial [Member]	'	'
Commercial mortgage loans, net	216.7	218.6
Commercial [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	216.7	218.6
Commercial [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	0	0
Apartment and Other [Member]	'	'
Commercial mortgage loans, net	302	289.9
Apartment and Other [Member] | Performing Financing Receivable [Member]	'	'
Commercial mortgage loans, net	302	289.9
Apartment and Other [Member] | Nonperforming Financing Receivable [Member]	'	'
Commercial mortgage loans, net	$0	$0

Investments_Impaired_Commercia

Investments (Impaired Commercial Mortgage Loans Identified In Management's Specific Review Of Probable Loan Losses And The Related Allowance) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	$21,300,000	$26,600,000	'
Impaired recorded investment, with related allowance	77,300,000	87,700,000	'
Total impaired recorded investment	98,600,000	114,300,000	'
Impaired unpaid principal balance, with no related allowance	21,300,000	26,600,000	'
Impaired unpaid principal balance, with related allowance	77,300,000	87,700,000	'
Total impaired unpaid principal balance	98,600,000	114,300,000	'
Related Allowance	24,600,000	25,900,000	28,200,000
Impaired recorded investment with no related allowance on nonaccrual status	3,300,000	9,100,000	'
Impaired recorded investment with related allowance on nonaccrual status	8,200,000	26,400,000	'
Total impaired recorded investment amount on Nonaccrual Status	11,500,000	35,500,000	'
Retail [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	12,800,000	16,100,000	'
Impaired recorded investment, with related allowance	54,500,000	58,500,000	'
Impaired unpaid principal balance, with no related allowance	12,800,000	16,100,000	'
Impaired unpaid principal balance, with related allowance	54,500,000	58,500,000	'
Related Allowance	13,200,000	16,100,000	'
Impaired recorded investment with no related allowance on nonaccrual status	1,800,000	7,600,000	'
Impaired recorded investment with related allowance on nonaccrual status	6,100,000	21,600,000	'
Office [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	3,000,000	3,900,000	'
Impaired recorded investment, with related allowance	9,600,000	9,700,000	'
Impaired unpaid principal balance, with no related allowance	3,000,000	3,900,000	'
Impaired unpaid principal balance, with related allowance	9,600,000	9,700,000	'
Related Allowance	3,200,000	3,800,000	'
Impaired recorded investment with no related allowance on nonaccrual status	1,500,000	1,500,000	'
Impaired recorded investment with related allowance on nonaccrual status	1,000,000	900,000	'
Industrial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	900,000	1,000,000	'
Impaired recorded investment, with related allowance	5,000,000	12,600,000	'
Impaired unpaid principal balance, with no related allowance	900,000	1,000,000	'
Impaired unpaid principal balance, with related allowance	5,000,000	12,600,000	'
Related Allowance	2,400,000	2,400,000	'
Impaired recorded investment with no related allowance on nonaccrual status	0	0	'
Impaired recorded investment with related allowance on nonaccrual status	100,000	1,400,000	'
Commercial [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	1,800,000	1,800,000	'
Impaired recorded investment, with related allowance	7,900,000	6,000,000	'
Impaired unpaid principal balance, with no related allowance	1,800,000	1,800,000	'
Impaired unpaid principal balance, with related allowance	7,900,000	6,000,000	'
Related Allowance	5,800,000	3,600,000	'
Impaired recorded investment with no related allowance on nonaccrual status	0	0	'
Impaired recorded investment with related allowance on nonaccrual status	1,000,000	2,500,000	'
Apartment and Other [Member]	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Impaired recorded investment, with no related allowance	2,800,000	3,800,000	'
Impaired recorded investment, with related allowance	300,000	900,000	'
Impaired unpaid principal balance, with no related allowance	2,800,000	3,800,000	'
Impaired unpaid principal balance, with related allowance	300,000	900,000	'
Related Allowance	0	0	'
Impaired recorded investment with no related allowance on nonaccrual status	0	0	'
Impaired recorded investment with related allowance on nonaccrual status	$0	$0	'

Investments_Troubled_Debt_Rest

Investments (Troubled Debt Restructurings on Financing Receivables) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	NumberOfLoans	NumberOfLoans	NumberOfLoans	NumberOfLoans
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	35	12	39	22
Pre-Restructuring Recorded Investment	$28,600,000	$17,700,000	$33,800,000	$24,700,000
Post-Restructuring Recorded Investment	26,000,000	15,500,000	31,300,000	25,600,000
Retail [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	33	10	34	16
Pre-Restructuring Recorded Investment	27,500,000	15,500,000	28,300,000	20,000,000
Post-Restructuring Recorded Investment	24,900,000	13,200,000	25,600,000	20,800,000
Office [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	1	0	1	3
Pre-Restructuring Recorded Investment	700,000	0	700,000	1,600,000
Post-Restructuring Recorded Investment	700,000	0	700,000	1,600,000
Industrial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	1	2	3	2
Pre-Restructuring Recorded Investment	400,000	2,200,000	2,100,000	2,200,000
Post-Restructuring Recorded Investment	400,000	2,300,000	2,300,000	2,300,000
Hotels and Motels [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Pre-Restructuring Recorded Investment	0	0	0	0
Post-Restructuring Recorded Investment	0	0	0	0
Commercial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	1	1
Pre-Restructuring Recorded Investment	0	0	2,700,000	900,000
Post-Restructuring Recorded Investment	0	0	2,700,000	900,000
Apartment and Other [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	0	0	0	0
Pre-Restructuring Recorded Investment	0	0	0	0
Post-Restructuring Recorded Investment	$0	$0	$0	$0

Investments_Average_Recorded_I

Investments (Average Recorded Investment In Impaired Commercial Mortgage Loans Before Specific Allowances For Losses) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Investments [Abstract]	'	'	'	'
Average recorded investment	$100.50	$127.50	$105.50	$113.20

Investments_Aging_Of_Commercia

Investments (Aging Of Commercial Mortgage Loans By Property Type) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	$1.10	$10.40
60 Days Past Due	0	3.6
Greater Than 90 Days Past Due	10.6	11.6
Total Past Due	11.7	25.6
Past Due	-2.1	-3.3
Current	5,333	5,382.80
Total commercial mortgage loans	5,342.60	5,405.10
Retail [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	1.1	2.8
60 Days Past Due	0	0.3
Greater Than 90 Days Past Due	6.7	6.1
Total Past Due	7.8	9.2
Past Due	-1.5	-1.5
Current	2,638.70	2,621.50
Total commercial mortgage loans	2,645	2,629.20
Office [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	0	1.3
60 Days Past Due	0	0
Greater Than 90 Days Past Due	2.8	3.7
Total Past Due	2.8	5
Past Due	-0.4	-0.9
Current	995.5	978.3
Total commercial mortgage loans	997.9	982.4
Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	0	0
60 Days Past Due	0	3.3
Greater Than 90 Days Past Due	1.1	1.8
Total Past Due	1.1	5.1
Past Due	-0.2	-0.9
Current	1,005	1,004.50
Total commercial mortgage loans	1,005.90	1,008.70
Hotels and Motels [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	0	6.3
60 Days Past Due	0	0
Greater Than 90 Days Past Due	0	0
Total Past Due	0	6.3
Past Due	0	0
Current	175.1	270
Total commercial mortgage loans	175.1	276.3
Commercial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	0	0
60 Days Past Due	0	0
Greater Than 90 Days Past Due	0	0
Total Past Due	0	0
Past Due	0	0
Current	216.7	218.6
Total commercial mortgage loans	216.7	218.6
Apartment and Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30 Days Past Due	0	0
60 Days Past Due	0	0
Greater Than 90 Days Past Due	0	0
Total Past Due	0	0
Past Due	0	0
Current	302	289.9
Total commercial mortgage loans	$302	$289.90

Investments_Net_Investment_Inc

Investments (Net Investment Income Summarized By Investment Type) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	$157.90	$165.10	$481.50	$496.50
Investment expenses	-4.5	-5.9	-17.9	-17.2
Tax-advantaged investment operating losses	-6.3	-3.4	-16.1	-10.2
Net investment income	147.1	155.8	447.5	469.1
Bonds [Member]	'	'	'	'
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	73.4	75.8	221	228.5
S and P Five Hundred Index Options [Member]	'	'	'	'
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	0.9	2.5	5.3	9.7
Commercial Mortgage Loans [Member]	'	'	'	'
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	83.1	84.9	250.1	252.2
Total Real Estate [Member]	'	'	'	'
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	0.5	-0.3	0.7	-0.9
Other Investment Classification [Member]	'	'	'	'
Summary Of Investment Income [Line Items]	'	'	'	'
Investment income	$0	$2.20	$4.40	$7

Investments_Schedule_Of_Gross_1

Investments (Schedule Of Gross Capital Gains And Losses By Investment Type) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Gross Capital Gains And Losses By Investment Type [Line Items]	'	'	'	'
Gross capital gains	$3.20	$1.80	$8.70	$10.90
Gross capital losses	-8.4	-10.5	-15.5	-23.8
Total net capital gains (losses)	-5.2	-8.7	-6.8	-12.9
Total Fixed Maturity Securities [Member]	'	'	'	'
Gross Capital Gains And Losses By Investment Type [Line Items]	'	'	'	'
Gross capital gains	1.4	0.6	4.8	8.2
Gross capital losses	-0.4	-1.1	-1.5	-2.1
Real Estate Owned [Member]	'	'	'	'
Gross Capital Gains And Losses By Investment Type [Line Items]	'	'	'	'
Gross capital gains	0.8	0.4	1.9	0.7
Gross capital losses	-1.7	-5.6	-3.4	-7
Commercial Mortgage Loans [Member]	'	'	'	'
Gross Capital Gains And Losses By Investment Type [Line Items]	'	'	'	'
Gross capital gains	0.8	0.8	1.8	1.8
Gross capital losses	-5.9	-3.8	-8.1	-12.8
Other Investment Classification [Member]	'	'	'	'
Gross Capital Gains And Losses By Investment Type [Line Items]	'	'	'	'
Gross capital gains	0.2	0	0.2	0.2
Gross capital losses	($0.40)	$0	($2.50)	($1.90)

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
			NumberOfDerivativeContracts
Derivative [Line Items]	'	'	'	'
S & P 500 index options purchased per month	'	'	2	'
Expiry date of S & P 500 index options purchased, years	'	'	'1 year 0 months 0 days	'
Derivative Option premiums paid	$2.20	$2.20	$6.30	$6.80
Amount received for derivative options exercised	4.7	4.3	14.6	13.7
Maximum credit exposure required increase in S&P 500 index, percentage	'	'	6.00%	'
Impact On Interest Credited Changes In Actuarial Assumptions	($1.40)	$1.30	($2.70)	$2.70

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Fair Value Of The Company's Derivative Assets And Liabilities) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
Derivative [Line Items]	'		'
Derivative Assets	$12,800,000		'
S and P Five Hundred Index Options [Member] | Other Investments [Member] | Not Designated as Hedging Instrument [Member]	'		'
Derivative [Line Items]	'		'
Derivative Assets	12,800,000		15,800,000
DerivativeNotionalAmount	375,400,000		350,500,000
Index Based Interest Guarantees [Member] | Other Policyholder Funds [Member] | Not Designated as Hedging Instrument [Member]	'		'
Derivative [Line Items]	'		'
Derivative Liabilities	69,400,000		67,600,000
DerivativeNotionalAmount	0	[1]	0	[1]
Interest Rate Swaps [Member]	'		'
Derivative [Line Items]	'		'
Derivative Positions	700,000		'
Interest Rate Swaps [Member] | Designated As Hedging Instrument [Member]	'		'
Derivative [Line Items]	'		'
DerivativeNotionalAmount	'		0
Interest Rate Swaps [Member] | Other Investments [Member] | Designated As Hedging Instrument [Member]	'		'
Derivative [Line Items]	'		'
DerivativeNotionalAmount	700,000		'
Interest Rate Swaps [Member] | Other Liabilities [Member] | Designated As Hedging Instrument [Member]	'		'
Derivative [Line Items]	'		'
DerivativeNotionalAmount	$350,000,000		$0
[1]	The underlying factors for index-based guarantees vary by contract and other criteria, such as floors and ceilings on rates and future payouts.

Derivative_Balance_Sheet_Offse

Derivative Balance Sheet Offsetting (Details) (Interest Rate Swaps [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
Interest Rate Swaps [Member]	'	'
Offsetting Liabilities [Line Items]	'	'
Derivative Fair Value Of Derivative Liability	($600,000)	$0
Derivative Fair Value Of Derivative Asset	1,300,000	0
Net interest rate swaps	700,000	'
Accrued interest payable	-1,800,000	0
Collateral	6,200,000	0
Net Amount	$5,100,000	$0

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Gain Or Loss Recognized In Earnings From The Change in Fair Value of Derivative Assets and Liabilities) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
All other net capital gains (losses)	($4.90)	($8.30)	($6.40)	($11.90)
Net investment income	147.1	155.8	447.5	469.1
Interest credited	-38.7	-43.9	-122.8	-130.8
Net gain (loss)	3.7	0.9	2.5	3.6
Interest Rate Swaps [Member] | Designated As Hedging Instrument [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
All other net capital gains (losses)	2.3	0	0.7	0
S and P Five Hundred Index Options [Member] | Not Designated as Hedging Instrument [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Net investment income	0.9	2.5	5.3	9.7
Index Based Interest Guarantees [Member] | Not Designated as Hedging Instrument [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Interest credited	$0.50	($1.60)	($3.50)	($6.10)

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Fair Value Of Derivative Assets And Its Maximum Credit Risk Exposure) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Derivative Assets at Fair Value	$12.80
Maximum Credit Risk	18.5
Merrill Lynch International [Member]	'
Derivative [Line Items]	'
Derivative Assets at Fair Value	1.5
Maximum Credit Risk	3.1
Bank of New York Mellon [Member]	'
Derivative [Line Items]	'
Derivative Assets at Fair Value	6.7
Maximum Credit Risk	9
Goldman Sachs [Member]	'
Derivative [Line Items]	'
Derivative Assets at Fair Value	4.6
Maximum Credit Risk	$6.40

Deferred_Acquisition_Costs_DAC2

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Narrative) (Details) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Value of Business Acquired [Member]

Value of Business Acquired [Member]

Other Intangible Assets [Member]

Other Intangible Assets [Member]

Customer Lists [Member]

Minnesota Life [Member]

TIAA [Member]

Group Insurance [Member]

Individual Disability Insurance Policies [Member]

Individual Disability Insurance Policies [Member]

Individual Disability Insurance Policies [Member]

Individual Disability Insurance Policies [Member]

Group Annuities [Member]

Group Annuities [Member]

Individual Annuities [Member]

Individual Annuities [Member]

Individual Annuities [Member]

Weighted Average

Value of Business Acquired [Member]

Value of Business Acquired [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Deferred Acquisition Costs [Member]

Maximum [Member]

Maximum [Member]

Weighted Average

Maximum [Member]

Minimum [Member]

Year Ten [Member]

Year Fifteen [Member]

Weighted Average

Year Five [Member]

Weighted Average

Year Five [Member]

Year Fifteen [Member]

Finite Lived Intangible Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intangible assets, useful life

'

'

'

'

'

'6 years 6 months 0 days

'30 years 0 months 0 days

'20 years 0 months 0 days

'2 years 6 months 0 days

'25 years 0 months 0 days

'20 years 0 months 0 days

'

'

'10 years 0 months 0 days

'

'30 years 0 months 0 days

'

'

Intangible Asset Percent Amortized

'

'

'

'

'

'

'

'

'

'

'

50.00%

75.00%

'

80.00%

'

55.00%

95.00%

Intangible assets, accumulated amortization

'

$70.30

$68.70

$47

$42.60

'

'

'

'

'

'

'

'

'

'

'

'

'

Intangible Assets Arising from Insurance Contracts Acquired in Business Combination, Impairment Write-down

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred_Acquisition_Costs_DAC3

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Schedule Of Activity For DAC, VOBA And Other Intangible Assets) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]	'	'
Carrying value at beginning of period, DAC	$319,100,000	$284,900,000
Carrying value at beginning of period, VOBA	20,100,000	23,400,000
Carrying value at beginning of period, Other intangible assets	32,100,000	38,200,000
Total balance at beginning of period	371,300,000	346,500,000
Deferred or acquired, DAC	58,900,000	76,900,000
Total deferred or acquired	58,900,000	76,900,000
Amortized during period, DAC	48,000,000	42,700,000
Amortized during period, VOBA	1,600,000	3,300,000
Other intangible assets	4,400,000	6,100,000
Total amortized during period	54,000,000	52,100,000
Carrying value at end of period, net DAC	330,000,000	319,100,000
Carrying value at end of period, net VOBA	18,500,000	20,100,000
Carrying value at end of period, Other intangible assets	27,700,000	32,100,000
Total carrying value at end of period	$376,200,000	$371,300,000

Deferred_Acquisition_Costs_DAC4

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Amount For DAC, VOBA Balances And Percentage To The Expected Gross Profit) (Details) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Deferred Acquisition Costs, Value Of Business Acquired And Other Intangible Assets Disclosures [Abstract]	'	'
DAC	$79.20	$80.10
VOBA	$3.90	$4.30
DAC, percent	24.00%	25.10%
VOBA, percent	21.10%	21.40%

Deferred_Acquisition_Costs_DAC5

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Balances Of Unlocking On DAC And VOBA) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Deferred Acquisition Costs, Value Of Business Acquired And Other Intangible Assets Disclosures [Abstract]	'	'	'	'
Increase (decrease) to DAC and VOBA as a result of unlocking	($1.10)	$0.30	($1.90)	($0.90)

Deferred_Acquisition_Costs_DAC6

Deferred Acquisition Costs ("DAC"), Value Of Business Acquired ("VOBA") And Other Intangible Assets (Estimated Net Amortization Of VOBA For Next Five Years) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Deferred Acquisition Costs, Value Of Business Acquired And Other Intangible Assets Disclosures [Abstract]	'
2014	$1.90
2015	6.9
2016	5.6
2017	4.2
2018	4.2
2019	$4

Commitments_And_Contingencies_

Commitments And Contingencies (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
	NumberOfContractExtentions
	NumberOfDebtCovenants
Commitments And Contingencies [Line Items]	'	'
Line of Credit Facility, Borrowing Capacity, Description	'The Company maintains a $250 million Facility. Upon the request of StanCorp and with the consent of the lenders under the Facility, the Facility can be increased to $350 million.	'
Line of Credit Facility, Current Borrowing Capacity	$250	'
Line of credit facility, maximum borrowing capacity	350	'
Line of credit facility, expiration date	22-Jun-18	'
Line of credit facility, number of one year extension periods	0	'
Line of Credit Facility, Covenant Terms	'Under the agreement, the Company is subject to two financial covenants, which are based on the Company's ratio of total debt to total capitalization and consolidated net worth. The Company is also subject to covenants that limit subsidiary indebtedness.	'
Repayment of senior debt	47.1	0
Line of credit facility, financial covenants, number	2	'
Committed capital for tax advanage assets	43.4	'
Loan Origination Commitments [Member]	'	'
Commitments And Contingencies [Line Items]	'	'
Total outstanding commitments to fund commercial mortgage loans	143.9	'
Maximum [Member]	'	'
Commitments And Contingencies [Line Items]	'	'
Fixed interest rate on commercial mortgage loan commitments	6.00%	'
Minimum [Member]	'	'
Commitments And Contingencies [Line Items]	'	'
Fixed interest rate on commercial mortgage loan commitments	4.00%	'
Junior Subordinated Debentures [Member]	'	'
Commitments And Contingencies [Line Items]	'	'
Debt instrument, face amount	252.9	'
Debt instrument, interest rate, stated percentage	6.90%	'
Debt instrument, maturity date	1-Jun-67	'
Debt instrument, call date, earliest	1-Jun-17	'
Debt instrument, floating rate, LIBOR rate plus	2.51%	'
Debt Instrument, Description of Variable Rate Basis	'LIBOR	'
Debt instrument, option to defer interest payments, years	'5 years 0 months 0 days	'
Debt Instrument Repurchased Face Amount	47.1	'
Debt Instrument Repurchase Date	20-Mar-14	'
Senior Notes 2022 [Member]	'	'
Commitments And Contingencies [Line Items]	'	'
Debt instrument, face amount	$250	'
Debt instrument, interest rate, stated percentage	5.00%	'
Debt instrument, maturity date	15-Aug-22	'

Incom_Taxes_Narrative_Details

Incom Taxes (Narrative) (Details)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Federal corporate tax rate	35.00%

Income_Taxes_Combined_Effectiv

Income Taxes (Combined Effective Tax Rate) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Combined Federal And State Effective Income Tax Rates	26.60%	27.90%	23.60%	25.90%

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'		'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	'	'	$134,700,000		$309,300,000	$309,300,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	'	'	54,900,000	[1]	'	-164,100,000	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	-900,000	[3]	'	-10,500,000	[4]
Other Comprehensive Income (Loss), Net of Tax	-37,200,000	-5,600,000	54,000,000		-187,600,000	-174,600,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	188,700,000	'	188,700,000		'	134,700,000
Unrealized Gains (losses) on Available For Sale Securities [Member]	'	'	'		'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'		'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	'	'	173,200,000		383,000,000	383,000,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	'	'	55,300,000	[1]	'	-205,300,000	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	2,100,000	[3]	'	-4,500,000	[4]
Other Comprehensive Income (Loss), Net of Tax	'	'	53,200,000		'	-209,800,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	226,400,000	'	226,400,000		'	173,200,000
Employee Benefit Plans [Member]	'	'	'		'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'		'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	'	'	-38,500,000		-73,700,000	-73,700,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	'	'	-400,000	[1]	'	41,200,000	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	-1,200,000	[3]	'	-6,000,000	[4]
Other Comprehensive Income (Loss), Net of Tax	'	'	800,000		'	35,200,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	($37,700,000)	'	($37,700,000)		'	($38,500,000)
[1]	Net of tax expense of $27.2 million for net unrealized gains on fixed maturity securities and net of tax benefit of $0.3 million for employee benefits.
[2]	Net of tax benefit of $111.1 million for net unrealized losses on fixed maturity securities and net of tax expense of $22.2 million for employee benefits.
[3]	Net of tax benefit of $1.1 million for net unrealized gains on fixed maturity securities and net of tax expense of $0.7 million for employee benefits.
[4]	Net of tax benefits of $3.1 million for net unrealized gains on fixed maturity securities and $3.2 million for employee benefits, respectively.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Parenthenticals) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Unrealized Gains (losses) on Available For Sale Securities [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Tax effect on other comprehensive income (loss) before reclassifications	$27,200,000	$111,100,000
Tax effect of reclassification from other comprehensive income	1,100,000	3,100,000
Employee Benefit Plans [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Tax effect on other comprehensive income (loss) before reclassifications	300,000	22,200,000
Tax effect of reclassification from other comprehensive income	$700,000	$3,200,000