INCOME TAXES (SCHEDULE OF COMPONENTS OF INCOME TAX EXPENSE) (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
Income Tax Disclosure [Abstract]
Current tax expense (benefit)									$ (45.2)	$ 10.7	$ 15.6
Deferred tax expense									173.0	118.6	143.6
Valuation allowance applicable to current year income									(14.0)	0.0	0.0
Income tax expense calculated based on estimated annual effective tax rate									113.8	129.3	159.2
Tax expense related to the sale of Conseco Life Insurance Company									0.0	0.0	14.2
Change in valuation allowance									40.7	(32.5)	(48.8)
IRS settlement	$ 118.7								(170.4)	0.0	0.0
Other items									10.9	0.2	(0.9)
Total income tax expense (benefit)	$ (53.5)	$ 30.7	$ 22.8	$ (5.0)	$ 23.0	$ 18.6	$ 25.9	$ 29.5	$ (5.0)	$ 97.0	$ 123.7