EARNINGS (LOSS) PER SHARE AND SHARE REPURCHASES (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Stock options excluded from computation of earnings per share (in shares)	18.5	18.1	17.4	16.1
Converted Series C Convertible Preferred Stock (in shares)	87.1	87.1	87.1	87.1
Stock repurchased during the period (in shares)			1.1	1.5
Stock repurchased during the period			$ 3.2	$ 6.4

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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