CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue
Premium Income	$ 2,250.0	$ 2,142.9
Net Investment Income	602.3	602.4
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(1.0)	0.0
Net Realized Investment Gain (Loss), Excluding Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(1.2)	11.0
Net Realized Investment Gain (Loss)	(2.2)	11.0
Other Income	49.5	50.2
Total Revenue	2,899.6	2,806.5
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,807.9	1,749.0
Commissions	282.3	270.2
Interest and Debt Expense	40.2	39.8
Deferral of Acquisition Costs	(169.3)	(162.1)
Amortization of Deferred Acquisition Costs	151.5	141.5
Compensation Expense	221.7	209.0
Other Expenses	224.2	228.8
Total Benefits and Expenses	2,558.5	2,476.2
Income Before Income Tax	341.1	330.3
Income Tax (Benefit)
Current	89.4	56.6
Deferred	(21.8)	43.8
Total Income Tax	67.6	100.4
Net Income	$ 273.5	$ 229.9
Net Income Per Common Share
Basic	$ 1.23	$ 1.00
Assuming Dilution	$ 1.23	$ 1.00