INCOME TAXES - VARIOUS (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	35.00%
Deferred tax assets, valuation allowance	$ 24.0	$ 17.1
State net operating loss carryforwards	25.8
Foreign net operating loss carryforwards	$ 5.7
Net operating loss carryforwards, beginning expiration year	2016
Research and development credit carry forward	$ 46.5	48.9
Research and development credit carry forward, beginning expiration year	2021
Research and development credit carry forward, ending expiration year	2031
Earnings from foreign subsidiaries that residual U.S. income taxes is not provided	$ 857.7
Cumulative unrealized tax deductions related to stock option exercises and vested restricted shares	4.9
Realized tax deductions related to stock option exercises and vested restricted shares	1.9
Gross uncertain tax position	78.9	89.2	$ 75.7	$ 47.5
Liability for unrecognized tax benefits that would affect effective tax rate, if recognized	$ 81.2
Number of tax years the company is currently open to audit by tax authorities | item	8
Estimated interest and penalties	$ 2.5	2.3	$ 0.5
Liability for unrecognized tax benefits for interest and penalties	5.3	2.8
income tax receivables	$ 14.9	$ 23.9