Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Fair Value of Assets and Liabilities) (Details)

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Jun. 30, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents $ 160.0 $ 177.0
Derivative Asset 72.5 33.1
Total Asset 232.5 210.1
Derivative Liability 20.8 0.5
Total Liability 20.8 0.5
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 40.0 177.0
Derivative Asset 0.0 0.0
Total Asset 40.0 177.0
Derivative Liability 0.0 0.0
Total Liability 0.0 0.0
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 120.0 0.0
Derivative Asset 0.0 1.5
Total Asset 120.0 1.5
Derivative Liability 0.0 0.0
Total Liability 0.0 0.0
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 0.0 0.0
Derivative Asset 72.5 31.6
Total Asset 72.5 31.6
Derivative Liability 20.8 0.5
Total Liability $ 20.8 $ 0.5