INCOME TAXES (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	35.00%
Deferred tax assets, valuation allowance	$ 17.1	$ 12.9
State net operating loss carryforwards	$ 31.8
Foreign net operating loss carryforwards		4.9
Net operating loss carryforwards, beginning expiration year	2016
Research and development credit carry forward	$ 48.9	34.4
Research and development credit carry forward, beginning expiration year	2016
Research and development credit carry forward, ending expiration year	2030
Earnings from foreign subsidiaries that residual U.S. income taxes is not provided	$ 624.0
Cumulative unrealized tax deductions related to stock option exercises and vested restricted shares	13.0
Realized tax deductions related to stock option exercises and vested restricted shares	5.0
Gross uncertain tax position	89.2	75.7	$ 47.5	$ 34.6
Liability for unrecognized tax benefits that would affect effective tax rate, if recognized	$ 89.0
Number of tax years the company is currently open to audit by tax authorities | item	9
Liability for unrecognized tax benefits for interest and penalties	$ 2.3	2.0
income tax receivables	$ 23.9	$ 82.6