8. Investing Activities (Details Narrative) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Security	Sep. 30, 2011	Dec. 31, 2011 Security
Investing Activities Details Narrative
Unrealized losses on debt securities outside closed block depressed of amortized cost, amount	$ 62.0		$ 62.0		$ 120.3
Unrealized losses on debt securities outside closed block depressed of amortized cost, percentage	20.00%		20.00%		20.00%
Unrealized losses on debt securities outside closed block depressed of amortized cost for more than 12 month, amount	61.0		61.0		93.5
Unrealized losses on debt securities outside closed block depressed of amortized cost for more than 12 month, percentage	20.00%		20.00%		20.00%
Unrealized losses on debt securities held in closed block depressed of amortized cost, amount	12.3		12.3		39.9
Unrealized losses on debt securities held in closed block depressed of amortized cost, percentage	20.00%		20.00%		20.00%
Unrealized losses on debt securities outside closed block depressed of amortized cost for more than 12 month, amount	12.3		12.3		17.3
Unrealized losses on debt securities held in closed block depressed of amortized cost for more than 12 month, percentage	20.00%		20.00%		20.00%
Number of debt securities			223		302
Number of equity securities			7		2
Total debt impairments recognized	7.1	9.7	17.5	18.5
Equity security OTTIs	0		1.5
Limited partnerships and other investment OTTIs	0.3	0.3
Amount of impairments recognized as adjustment to other comprehensive loss	(0.2)	21.2	11.3	26.1
Unfunded commitments related to VIEs	3.1		3.1		3.6
Fixed maturities below-investment-grade assets	1,010.1		1,010.1		949.6
Derivative assets, net of liabilities	131.6		131.6
Debt securities, fair value	172.8		172.8
Maximum amount of loss due to credit risk	$ 304.4		$ 304.4