8. Investing Activities (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Debt securities	$ 158.9		$ 462.2
Equity securities	0.5		2.4
Limited partnerships and other investments	14.0		48.5
Policy loans	35.7		120.7
Fair value investments	(0.1)		1.5
Total investment income	209.0		635.3
Less: Discontinued operations	0.4		1.6
Less: Investment expenses	3.5		10.4
Net investment income	205.1	203.5	623.3	628.1
Amounts applicable to closed block	115.7		343.5
As restated and amended [Member]
Debt securities		153.8		457.4
Equity securities		0.5		1.1
Limited partnerships and other investments		13.6		48.1
Policy loans		42.5		128.1
Fair value investments		(4.4)		0.1
Total investment income		206.0		634.8
Less: Discontinued operations		0.5		1.5
Less: Investment expenses		2.0		5.2
Net investment income		203.5		628.1
Amounts applicable to closed block		$ 113.2		$ 358.2