CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue
Premium Income	$ 2,142.2	$ 2,081.6	$ 4,285.1	$ 4,169.1
Net Investment Income	620.5	623.3	1,222.9	1,229.7
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	0.0	(9.4)	0.0	(30.5)
Net Realized Investment Gain, Excluding Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	8.1	14.7	19.1	15.3
Net Realized Investment Gain (Loss)	8.1	5.3	19.1	(15.2)
Other Income	51.2	51.1	101.4	103.1
Total Revenue	2,822.0	2,761.3	5,628.5	5,486.7
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,752.0	1,733.5	3,501.0	3,463.3
Commissions	261.3	255.0	531.5	514.9
Interest and Debt Expense	39.9	42.4	79.7	81.0
Deferral of Acquisition Costs	(153.2)	(146.7)	(315.3)	(299.2)
Amortization of Deferred Acquisition Costs	138.3	126.2	279.8	258.4
Compensation Expense	215.9	202.9	422.9	410.5
Other Expenses	206.2	207.8	437.0	413.4
Total Benefits and Expenses	2,460.4	2,421.1	4,936.6	4,842.3
Income Before Income Tax	361.6	340.2	691.9	644.4
Income Tax
Current	105.8	107.7	162.4	158.7
Deferred	10.7	(4.3)	54.5	38.3
Total Income Tax	116.5	103.4	216.9	197.0
Net Income	$ 245.1	$ 236.8	$ 475.0	$ 447.4
Net Income Per Common Share
Basic	$ 1.08	$ 1.00	$ 2.08	$ 1.88
Assuming Dilution	$ 1.07	$ 1.00	$ 2.07	$ 1.87