CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenue
Premium Income	$ 2,006.3	$ 1,938.5
Net Investment Income	602.0	615.8
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(4.5)	0
Net Realized Investment Gain (Loss), Excluding Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(10.8)	6.3
Net Realized Investment Gain (Loss)	(15.3)	6.3
Other Income	54.4	53.8
Total Revenue	2,647.4	2,614.4
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,653.9	1,631.3
Commissions	256.9	236.0
Interest and Debt Expense	37.8	37.9
Deferral of Acquisition Costs	(145.0)	(129.0)
Amortization of Deferred Acquisition Costs	134.3	118.6
Compensation Expense	213.1	201.0
Other Expenses	193.4	188.8
Total Benefits and Expenses	2,344.4	2,284.6
Income Before Income Tax	303.0	329.8
Income Tax
Current	40.6	37.8
Deferred	49.5	66.2
Total Income Tax	90.1	104.0
Net Income	$ 212.9	$ 225.8
Net Income Per Common Share
Basic	$ 0.85	$ 0.87
Assuming Dilution	$ 0.84	$ 0.86