CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Premium Income	$ 8,986.1	$ 8,597.1	$ 8,357.7
Net Investment Income	2,453.7	2,451.7	2,459.0
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(17.5)	(8.1)	(30.5)
Net Realized Investment Gain (Loss), Excluding Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(22.0)	48.4	54.7
Net Realized Investment Gain (Loss)	(39.5)	40.3	24.2
Other Income	198.2	197.7	205.6
Total Revenue	11,598.5	11,286.8	11,046.5
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	8,020.4	7,055.7	6,941.8
Commissions	1,108.4	1,060.8	1,026.7
Interest and Debt Expense	167.3	159.9	166.0
Deferral of Acquisition Costs	(668.0)	(628.0)	(592.4)
Amortization of Deferred Acquisition Costs	565.5	527.1	493.0
Compensation Expense	885.9	852.3	839.1
Other Expenses	891.2	855.0	824.6
Total Benefits and Expenses	10,970.7	9,882.8	9,698.8
Income Before Income Tax	627.8	1,404.0	1,347.7
Income Tax
Current	227.4	401.3	385.7
Deferred	(123.0)	8.5	30.6
Total Income Tax	104.4	409.8	416.3
Net Income	$ 523.4	$ 994.2	$ 931.4
Net Income Per Common Share
Basic	$ 2.38	$ 4.39	$ 3.96
Assuming Dilution	$ 2.38	$ 4.37	$ 3.95