BUSINESS SEGMENTS (RECONCILIATION OF OPERATING PROFIT (LOSS) FROM SEGMENTS TO CONSOLIDATED) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Total segment revenues									$ 3,914.2	$ 3,787.2	$ 3,851.8
Net realized investment gains (losses)									8.3	(36.6)	33.9
Revenues related to certain non-strategic investments and earnings attributable to VIEs									52.6	36.3	33.2
Fee revenue related to transition and support services agreements									10.0	25.0	15.0
Revenues of CLIC prior to being sold									0.0	0.0	210.8
Total revenues	$ 1,004.9	$ 1,015.9	$ 1,003.9	$ 960.4	$ 969.6	$ 904.5	$ 959.5	$ 978.3	3,985.1	3,811.9	4,144.7
Total segment expenses									3,503.9	3,364.4	3,424.4
Insurance policy benefits - fair value changes in embedded derivative liabilities									(11.3)	(15.7)	48.5
Amortization related to fair value changes in embedded derivative liabilities									1.7	3.8	(12.5)
Amortization related to net realized investment gains (losses)									0.7	(0.5)	1.0
Expenses related to certain non-strategic investments and expenses (earnings) attributable to VIEs									54.6	43.0	41.2
Fair value changes and amendment related to agent deferred compensation plan									(3.1)	(15.1)	26.8
Loss on extinguishment or modification of debt									0.0	32.8	0.6
Loss on sale of subsidiary, (gain) loss on reinsurance transactions and transition expenses									75.4	9.0	239.8
Expenses related to transition and support services agreements									10.0	22.5	12.4
Expenses of CLIC prior to being sold									0.0	0.0	187.4
Total benefits and expenses									3,631.9	3,444.2	3,969.6
Income before income taxes	180.7	49.3	82.7	40.5	160.3	52.4	72.7	82.3	353.2	367.7	175.1
Tax expense on period income									127.8	129.5	159.2
Valuation allowance for deferred tax assets and other tax items									(132.8)	(32.5)	(35.5)
Net income	$ 234.2	$ 18.6	$ 59.9	$ 45.5	$ 137.3	$ 33.8	$ 46.8	$ 52.8	$ 358.2	$ 270.7	$ 51.4