CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue
Premium Income	$ 2,142.9	$ 2,087.5
Net Investment Income	602.4	606.4
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	0.0	(21.1)
Net Realized Investment Gain, Excluding Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	11.0	0.6
Net Realized Investment Gain (Loss)	11.0	(20.5)
Other Income	50.2	52.0
Total Revenue	2,806.5	2,725.4
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,749.0	1,729.8
Commissions	270.2	259.9
Interest and Debt Expense	39.8	38.6
Deferral of Acquisition Costs	(162.1)	(152.5)
Amortization of Deferred Acquisition Costs	141.5	132.2
Compensation Expense	207.0	207.6
Other Expenses	230.8	205.6
Total Benefits and Expenses	2,476.2	2,421.2
Income Before Income Tax	330.3	304.2
Income Tax
Current	56.6	51.0
Deferred	43.8	42.6
Total Income Tax	100.4	93.6
Net Income	$ 229.9	$ 210.6
Net Income Per Common Share
Basic	$ 1.00	$ 0.88
Assuming Dilution	$ 1.00	$ 0.88