SPECIAL (GAINS) AND CHARGES - Restructuring Activities, Acquisition and Integration Related Costs (Details) 10Q $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) item	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Non-restructuring Special (Gains) and Charges
Energy related charges, before tax				$ 0.0	$ 63.6
Energy related charges, after tax					42.9
Energy related charges, inventory write-downs and related disposal costs					31.1
Property, Plant and Equipment, Net	$ 3,617.2		$ 3,617.2	3,617.2		$ 3,365.0
Contract termination and litigation related charges, before tax				20.2
Contract termination and litigation related charges, after tax				15.9
Fixed asset impairment and related inventory charges, before tax					10.0
Fixed asset impairment and related inventory charges, after tax		$ 0.0			6.3
Litigation related charges, before tax	2.2	9.2			32.7
Litigation related charges, after tax	1.4	5.6			20.7
Special (gains) and charges
Restructuring
Restructuring charges incurred, pre-tax	4.1	(7.7)		34.6	(6.8)
Non-restructuring Special (Gains) and Charges
Acquisition and integration costs	1.8	1.7		12.7	5.0
Acquisition and integration costs, after tax		1.0			3.1
Business combination and integration related costs, pre tax	1.8			12.7
Business combination and integration related costs, after tax	1.2			8.5
Energy related charges, before tax					12.6
Foreign currency translation (charges) recovery associated with remeasurement and deconsolidation, before tax	3.2			8.5	7.8
Cost of sales
Restructuring
Restructuring charges incurred, pre-tax				2.2	0.9
Non-restructuring Special (Gains) and Charges
Acquisition and integration costs	0.3			12.9
Energy related charges, before tax					51.0
Cost of sales | Anios and Swisher
Non-restructuring Special (Gains) and Charges
Acquisition and integration costs	0.3			12.9
Acquisition and integration costs, after tax	0.2			8.2
2017 Restructuring Plan
Restructuring
Number of positions expected to be eliminated | item			570
Restructuring charges incurred, pre-tax	3.6			36.6
Restructuring charges incurred, after tax	1.3			26.2
Cash payments	4.3			4.9
Restructuring liability	28.2		$ 28.2	28.2
2017 Restructuring Plan | Minimum
Restructuring
Restructuring charge expected to be incurred, pre-tax	40.0		40.0	40.0
Restructuring charge expected to be incurred, after tax	30.0		30.0	30.0
2017 Restructuring Plan | Maximum
Restructuring
Restructuring charge expected to be incurred, pre-tax	45.0		45.0	45.0
Restructuring charge expected to be incurred, after tax	35.0		35.0	35.0
Energy and Combined Restructuring Plans
Restructuring
Restructuring net gain		7.7			5.9
Restructuring net gain, net of tax		7.2			7.3
Restructuring liability	23.1		23.1	23.1		$ 39.6
VENEZUELA
Non-restructuring Special (Gains) and Charges
Foreign currency translation (charges) recovery associated with remeasurement and deconsolidation, before tax	3.2			8.5	7.8
Foreign currency translation (charges) recovery associated with remeasurement and deconsolidation, after tax	2.0	0.0		5.3	4.9
Global Energy | Special (gains) and charges
Non-restructuring Special (Gains) and Charges
Employee termination costs					12.8
Accrued severance	$ 3.2		$ 3.2	$ 3.2
Global Energy | North America
Non-restructuring Special (Gains) and Charges
Energy related charges, fixed asset impairment and accelerated depreciation					18.2
Certain U.S. Production Equipment and Buildings | Global Energy | North America
Non-restructuring Special (Gains) and Charges
Property, Plant and Equipment, Net		$ 0.0			$ 0.0