INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income tax at the federal statutory rate	$ (4.0)	$ 8.7	$ (26.7)
Change in valuation allowance related to deferred tax assets	5.3	6.2	14.8
Change in uncertain tax positions, including interest	(1.5)	0.3	0.3
State income tax, net of federal income tax effect	(4.1)	2.1	(4.0)
Tax effect resulting from foreign activities and foreign dividends	0.5	(3.3)	(4.2)
Non-deductible expenses	0.9	2.3	1.5
Research credits	(1.8)	(1.7)	(1.7)
Other, net	1.6	0.7	(0.3)
Income Tax Expense (Benefit)	$ (3.1)	$ 15.3	$ (20.3)
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income tax at the federal statutory rate	35.00%	35.00%	35.00%
Change in valuation allowance related to deferred tax assets	(46.50%)	24.90%	(19.40%)
Change in uncertain tax positions, including interest	13.20%	1.10%	(0.40%)
State income tax, net of federal income tax effect	35.90%	8.40%	5.30%
Tax effect resulting from foreign activities and foreign dividends	(4.30%)	(13.40%)	5.50%
Non-deductible expenses	(7.90%)	9.40%	(1.90%)
Research credits	15.80%	(6.70%)	2.20%
Other, net	(14.00%)	3.00%	0.30%
Effective tax rate	27.20%	61.70%	26.60%