INCOME TAXES (SUMMARY OF VALUATION ALLOWANCE) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Increase (Decrease) in Valuation Allowance [Roll Forward]
Beginning valuation allowance	$ 213.5	$ 246.0	$ 294.8
Change in valuation allowance	26.7	(32.5)	(48.8)
Ending valuation allowance	$ 240.2	$ 213.5	$ 246.0

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant