INCOME TAXES - DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Inventory reserves	$ 12.9	$ 11.0
Warranty reserves	22.9	19.6
Accrued liabilities	35.7	30.5
Net operating loss carryforward	3.3	3.5
Research and development credit carry forward	46.5	48.9
Alternative minimum tax credit carryforward	5.0	5.0
Other		6.8
Deferred Tax Assets, Gross, Total	126.3	125.3
Deferred tax liabilities:
Book to tax revenue differences	(46.5)	(11.9)
Intangible assets	(171.3)	(171.1)
Depreciation	(10.3)	(17.9)
Other	(0.2)
Total deferred tax liabilities	(228.3)	(200.9)
Net deferred tax liability before valuation allowance	(102.0)	(75.6)
Valuation allowance	(24.0)	(17.1)
Deferred Tax Liabilities, Net	$ (126.0)	$ (92.7)