CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue
Premium Income	$ 8,082.4	$ 7,797.2	$ 7,624.7
Net Investment Income	2,481.2	2,492.2	2,506.9
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(32.4)	(13.5)	(0.8)
Other Net Realized Investment Gain (Loss)	(11.4)	29.6	7.6
Net Realized Investment Gain (Loss)	(43.8)	16.1	6.8
Other Income	211.5	219.0	230.2
Total Revenue	10,731.3	10,524.5	10,368.6
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	6,782.8	7,310.8	6,595.7
Commissions	996.3	935.3	909.5
Interest and Debt Expense	152.8	167.5	149.4
Deferral of Acquisition Costs	(569.7)	(524.0)	(466.8)
Amortization of Deferred Acquisition Costs	482.3	440.8	418.9
Compensation Expense	835.1	820.9	790.4
Other Expenses	813.4	831.2	751.5
Total Benefits and Expenses	9,493.0	9,982.5	9,148.6
Income Before Income Tax	1,238.3	542.0	1,220.0
Income Tax
Current	342.1	135.5	328.5
Deferred	29.1	4.4	44.5
Total Income Tax	371.2	139.9	373.0
Net Income	$ 867.1	$ 402.1	$ 847.0
Net Income Per Common Share
Basic	$ 3.51	$ 1.57	$ 3.20
Assuming Dilution	$ 3.50	$ 1.57	$ 3.19