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Financial Instruments Schedule of the Fair Values of Derivative Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Derivatives, Fair Value [Line Items]    
Derivative asset fair value $ 5.3 $ 5.0
Derivative liability fair value 3.0 12.6
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges, asset at fair value 3.1 0.6
Derivatives designated as hedges, liability at fair value 0.0 0.2
Nondesignated [Member]    
Derivatives, Fair Value [Line Items]    
Derivatives not designated as hedges, asset at fair value 2.2 4.4
Derivatives not designated as hedges, liability at fair value 3.0 12.4
Significant Other Observable Inputs (Level 2) [Member]    
Derivatives, Fair Value [Line Items]    
Derivative asset fair value 5.3 5.0
Derivative liability fair value $ 3.0 $ 12.6