INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Tax Contingency [Line Items]
Liability for uncertain tax positions	$ 28.4		$ 28.4		$ 27.8
Liability for uncertain tax positions - current	1.1		1.1		0.4
Liability for uncertain positions reversed due to lapse in statute of limitations			(0.4)
Liability for uncertain positions expected to be reversed in next fiscal year					1.1
Interest and penalties uncertain tax positions recognized			0.4	$ 0.6
Benefit on reversal of interest and penalties	0.0	$ (1.3)	0.0	$ (2.6)
Accrued interest and penalties uncertain tax positions	2.6		2.6		$ 2.2
Power Solutions [Member]
Income Tax Contingency [Line Items]
Interest and penalties uncertain tax positions recognized			4.9
Interest and penalties uncertain tax positions recognized reversal			(2.6)
Annual accrual for liability for uncertain tax positions	$ 0.7		$ 0.7