CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income	$ 212.6	$ 213.9
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain on Securities Before Adjustment (net of tax benefit of $159.4; $110.5)	(278.5)	(197.2)
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance (net of tax expense of $108.6; $97.2)	197.4	166.8
Change in Net Gain on Cash Flow Hedges (net of tax benefit of $0.2; $5.9)	(2.0)	(10.7)
Change in Foreign Currency Translation Adjustment	(69.9)	28.2
Change in Unrecognized Pension and Postretirement Benefit Costs (net of tax expense of $5.5; $3.5)	10.7	6.5
Total Other Comprehensive Loss	(142.3)	(6.4)
Comprehensive Income	$ 70.3	$ 207.5