CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue
Premium Income	$ 7,797.2	$ 7,624.7	$ 7,716.1
Net Investment Income	2,477.4	2,492.1	2,515.2
Realized Investment Gain (Loss)
Other-Than-Temporary Impairment Loss on Fixed Maturity Securities	(13.5)	(0.8)	0
Other Net Realized Investment Gain	29.6	7.6	56.2
Net Realized Investment Gain	16.1	6.8	56.2
Other Income	219.0	230.2	227.9
Total Revenue	10,509.7	10,353.8	10,515.4
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	7,310.8	6,595.7	6,722.2
Commissions	935.3	909.5	917.2
Interest and Debt Expense	167.5	149.4	145.4
Deferral of Acquisition Costs	(524.0)	(466.8)	(467.3)
Amortization of Deferred Acquisition Costs	440.8	418.9	378.7
Compensation Expense	820.9	790.4	786.8
Other Expenses	831.2	751.5	782.9
Total Benefits and Expenses	9,982.5	9,148.6	9,265.9
Income Before Income Tax	527.2	1,205.2	1,249.5
Income Tax
Current	103.3	296.6	206.6
Deferred	10.5	50.5	148.5
Total Income Tax	113.8	347.1	355.1
Net Income	$ 413.4	$ 858.1	$ 894.4
Net Income Per Common Share
Basic	$ 1.62	$ 3.24	$ 3.18
Assuming Dilution	$ 1.61	$ 3.23	$ 3.17