OTHER OPERATING STATEMENT DATA (SCHEDULE OF CHANGES IN PRESENT VALUE OF FUTURE INSURANCE PROFITS) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Present Value of Future Insurance Profits [Roll Forward]
Balance, beginning of year	$ 449.0	$ 489.4	$ 679.3
Amortization	(62.2)	(69.1)	(76.2)
Effect of reinsurance transaction	0.0	0.0	5.0
Amounts related to CLIC prior to being sold	0.0	0.0	(15.5)
Amounts related to changes in unrealized investment gains (losses) on fixed maturities, available for sale	15.0	28.7	(103.2)
Balance, end of year	$ 401.8	$ 449.0	$ 489.4