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Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Fair Value of Assets and Liabilities) (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Ìý Ìý
Cash equivalents $ 77.0 $ 177.0
Derivative Asset 89.5 33.1
Total Asset 166.5 210.1
Derivative Liability 9.3 0.5
Total Liability 9.3 0.5
Fair Value, Inputs, Level 1 [Member] Ìý Ìý
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Ìý Ìý
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] Ìý Ìý
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Ìý Ìý
Cash equivalents 37.0 0.0
Derivative Asset 0.0 1.5
Total Asset 37.0 1.5
Derivative Liability 0.0 0.0
Total Liability 0.0 0.0
Fair Value, Inputs, Level 3 [Member] Ìý Ìý
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Ìý Ìý
Cash equivalents 0.0 0.0
Derivative Asset 89.5 31.6
Total Asset 89.5 31.6
Derivative Liability 9.3 0.5
Total Liability $ 9.3 $ 0.5