Investments (Tables)

9 Months Ended

Sep. 30, 2011

Schedule of Available-for-sale Securities [Line Items]

Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]

The following table sets forth the pre-tax amount of other-than-temporary-impairment (“OTTI”) credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of the dates indicated, for which a portion of the OTTI loss has been recognized in Accumulated Other Comprehensive Income, and the corresponding changes in such amounts.

	Nine Months Ended						Three Months Ended
(Dollars in Millions)	Sep 30, 2011			Sep 30, 2010			Sep 30, 2011			Sep 30, 2010
Balance at Beginning of Period	$	2.4		$	3.7		$	2.1		$	5.4
Additions for Previously Unrecognized OTTI Credit Losses	—			3.1			—			—
Increases to Previously Recognized OTTI Credit Losses	—			2.6			—			—
Reductions to Previously Recognized OTTI Credit Losses	(0.5		)	(1.6		)	(0.2		)	(0.1		)
Reductions due to Intent to Sell Investments	—			(5.1		)	—			(2.6		)
Balance at End of Period	$	1.9		$	2.7		$	1.9		$	2.7

Investments Classified by Contractual Maturity Date [Table Text Block]

The estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2011, by contractual maturity, were:

(Dollars in Millions)
Due in One Year or Less	$	90.3
Due after One Year to Five Years	466.7
Due after Five Years to Ten Years	942.2
Due after Ten Years	2,978.3
Asset-backed Securities Not Due at a Single Maturity Date	304.9
Investments in Fixed Maturities	$	4,782.4

Schedule of Unrealized Loss on Investments [Table Text Block]

An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2010 is presented below:

	Less Than 12 Months					12 Months or Longer					Total
(Dollars in Millions)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed Maturities:
U.S. Government and Government Agencies and Authorities	$	18.5	$	(0.1	)	$	0.1	$	—		$	18.6	$	(0.1	)
States and Political Subdivisions	455.6		(16.9		)	16.5		(3.8		)	472.1		(20.7		)
Corporate Securities:
Bonds and Notes	123.0		(3.7		)	87.8		(6.4		)	210.8		(10.1		)
Redeemable Preferred Stocks	0.7		—			—		—			0.7		—
Mortgage and Asset-backed	—		—			4.6		(1.3		)	4.6		(1.3		)
Total Fixed Maturities	597.8		(20.7		)	109.0		(11.5		)	706.8		(32.2		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate	3.0		—			2.6		(0.2		)	5.6		(0.2		)
Other Industries	0.7		(0.1		)	2.8		(0.1		)	3.5		(0.2		)
Common Stocks:
Manufacturing	7.9		(0.3		)	1.7		—			9.6		(0.3		)
Other Industries	6.3		(0.1		)	—		—			6.3		(0.1		)
Other Equity Interests:
Limited Liability Companies and Limited Partnerships	2.2		(0.3		)	6.1		(0.9		)	8.3		(1.2		)
Total Equity Securities	20.1		(0.8		)	13.2		(1.2		)	33.3		(2.0		)
Total	$	617.9	$	(21.5	)	$	122.2	$	(12.7	)	$	740.1	$	(34.2	)

An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at September 30, 2011 is presented below:

	Less Than 12 Months					12 Months or Longer					Total
(Dollars in Millions)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed Maturities:
U.S. Government and Government Agencies and Authorities	$	1.3	$	—		$	—	$	—		$	1.3	$	—
States and Political Subdivisions	—		—			12.3		(0.8		)	12.3		(0.8		)
Corporate Securities:
Bonds and Notes	176.9		(5.5		)	67.4		(4.8		)	244.3		(10.3		)
Redeemable Preferred Stocks	1.0		(0.3		)	1.7		—			2.7		(0.3		)
Mortgage and Asset-backed	—		—			2.9		(0.7		)	2.9		(0.7		)
Total Fixed Maturities	179.2		(5.8		)	84.3		(6.3		)	263.5		(12.1		)
Equity Securities:
Preferred Stocks:
Finance, Insurance and Real Estate	52.4		(5.6		)	2.1		(0.7		)	54.5		(6.3		)
Other Industries	3.2		(0.6		)	2.8		(0.1		)	6.0		(0.7		)
Common Stocks:
Manufacturing	11.2		(0.9		)	—		—			11.2		(0.9		)
Other Industries	15.7		(2.8		)	—		—			15.7		(2.8		)
Other Equity Interests:
Exchange Traded Funds	50.5		(0.4		)	—		—			50.5		(0.4		)
Limited Liability Companies and Limited Partnerships	43.3		(5.0		)	1.6		(0.3		)	44.9		(5.3		)
Total Equity Securities	176.3		(15.3		)	6.5		(1.1		)	182.8		(16.4		)
Total	$	355.5	$	(21.1	)	$	90.8	$	(7.4	)	$	446.3	$	(28.5	)

Schedule of Other Investments [Table Text Block]

The carrying values of the Company’s Other Investments at September 30, 2011 and December 31, 2010 were:

(Dollars in Millions)	Sep 30, 2011		Dec 31, 2010
Loans to Policyholders at Unpaid Principal	$	248.6	$	238.4
Real Estate at Depreciated Cost	241.8		249.9
Trading Securities at Fair Value	4.2		5.1
Other	0.6		0.8
Total	$	495.2	$	494.2

Equity Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2010 were:

			Gross Unrealized
(Dollars in Millions)	Cost		Gains		Losses			Fair Value
Preferred Stocks:
Finance, Insurance and Real Estate	$	94.4	$	3.5	$	(0.2	)	$	97.7
Other Industries	20.0		7.6		(0.2		)	27.4
Common Stocks:
Intermec	86.9		50.6		—			137.5
Manufacturing	75.3		14.6		(0.3		)	89.6
Other Industries	37.3		6.6		(0.1		)	43.8
Other Equity Interests:
Exchange Traded Funds	76.5		2.7		—			79.2
Limited Liability Companies and Limited Partnerships	58.8		17.6		(1.2		)	75.2
Investments in Equity Securities	$	449.2	$	103.2	$	(2.0	)	$	550.4

Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at September 30, 2011 were:

			Gross Unrealized
(Dollars in Millions)	Cost		Gains		Losses			Fair Value
Preferred Stocks:
Finance, Insurance and Real Estate	$	94.4	$	0.8	$	(6.3	)	$	88.9
Other Industries	18.3		2.6		(0.7		)	20.2
Common Stocks:
Manufacturing	63.6		9.6		(0.9		)	72.3
Other Industries	40.3		4.0		(2.8		)	41.5
Other Equity Interests:
Exchange Traded Funds	66.0		0.1		(0.4		)	65.7
Limited Liability Companies and Limited Partnerships	72.4		5.1		(5.3		)	72.2
Investments in Equity Securities	$	355.0	$	22.2	$	(16.4	)	$	360.8

Debt Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2011 were:

	Amortized Cost		Gross Unrealized					Fair Value
(Dollars in Millions)			Gains		Losses
U.S. Government and Government Agencies and Authorities	$	464.7	$	52.0	$	—		$	516.7
States and Political Subdivisions	1,761.0		143.1		(0.8		)	1,903.3
Corporate Securities:
Bonds and Notes	1,977.7		307.8		(10.3		)	2,275.2
Redeemable Preferred Stocks	78.4		3.4		(0.3		)	81.5
Mortgage and Asset-backed	5.3		1.1		(0.7		)	5.7
Investments in Fixed Maturities	$	4,287.1	$	507.4	$	(12.1	)	$	4,782.4

The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2010 were:

	Amortized Cost		Gross Unrealized					Fair Value
(Dollars in Millions)			Gains		Losses
U.S. Government and Government Agencies and Authorities	$	508.6	$	28.4	$	(0.1	)	$	536.9
States and Political Subdivisions	1,760.0		53.5		(20.7		)	1,792.8
Corporate Securities:
Bonds and Notes	1,880.3		178.8		(10.1		)	2,049.0
Redeemable Preferred Stocks	83.4		4.9		—			88.3
Mortgage and Asset-backed	8.5		1.1		(1.3		)	8.3
Investments in Fixed Maturities	$	4,240.8	$	266.7	$	(32.2	)	$	4,475.3