Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.6.0.2
COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Loss Contingencies [Line Items]    
Accrual for Environmental Loss Contingencies $ 2.8 $ 3.6
Michigan Electricity Matters [Member]    
Loss Contingencies [Line Items]    
Loss Contingency Accrual $ 13.6