LIABILITIES FOR INSURANCE PRODUCTS (SCHEDULE OF INSURANCE LIABILITIES BY PRODUCT SEGMENT) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Liability for Future Policy Benefit, by Product Segment [Line Items]
Future policy benefits	$ 10,953.3	$ 10,602.1
Policyholder account balance	$ 10,912.7	10,762.3
Long-term Care in Run-off [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rate assumption	6.00%
Future policy benefits	$ 5,346.1	5,172.2
Traditional Life Insurance Contracts [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rate assumption	5.00%
Future policy benefits	$ 2,322.1	2,248.7
Accident and Health Contract [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rate assumption	5.00%
Future policy benefits	$ 2,695.6	2,589.9
Interest-sensitive Life Insurance Contract [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rate assumption	5.00%
Future policy benefits	$ 52.2	44.7
Policyholder account balance	$ 1,046.4	992.8
Annuities and Supplemental Contract with Life Contingencies [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rate assumption	4.00%
Future policy benefits	$ 537.3	546.6
Fixed Index Annuity [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Policyholder account balance	5,324.5	4,884.4
Other Annuity [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Policyholder account balance	$ 4,541.8	$ 4,885.1