CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Income	$ 858.1	$ 894.4	$ 284.2
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain on Securities Before Adjustment (net of tax expense (benefit) of $(1,102.8); $467.7; $798.3)	(2,101.2)	918.8	1,519.8
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance (net of tax expense (benefit) of $743.3; $(325.6); $(701.5))	1,363.4	(660.1)	(1,321.1)
Change in Net Gain on Cash Flow Hedges (net of tax expense (benefit) of $(1.3); $(4.3); $25.2)	(5.3)	(7.1)	47.7
Change in Foreign Currency Translation Adjustment	25.5	45.0	(10.5)
Change in Unrecognized Pension and Postretirement Benefit Costs (net of tax expense (benefit) of $185.2; $(68.0); $(67.4))	344.6	(130.4)	(125.5)
Total Other Comprehensive Income (Loss)	(373.0)	166.2	110.4
Comprehensive Income	$ 485.1	$ 1,060.6	$ 394.6