DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Assets and Liabilities - North American Coal (Details) - North American Coal [Member] - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Schedule of Disposal Groups, Including Discontinued Operations, Assets and Liabilities [Line Items]
Disposal Group, Including Discontinued Operation, Other Assets, Current	$ 0.5	$ 14.9
Assets of Discontinued Operations	0.5	14.9
Disposal Group, Including Discontinued Operation, Accrued Liabilities	0.1	0.0
Disposal Group, Including Discontinued Operation, Other Liabilities, Current	4.2	6.9
Disposal Group, Including Discontinued Operation, Liabilities	$ 4.3	$ 6.9