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Fair Value Measurements (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Apr. 01, 2017
Financial assets recorded at fair value:    
Derivative Asset, Fair Value $ 15.7 $ 32.6
Financial liabilities recorded at fair value:    
Derivative Liability, Fair Value 79.4 21.7
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]    
Financial assets recorded at fair value:    
Derivative Asset, Fair Value 15.7 32.6
Financial liabilities recorded at fair value:    
Derivative Liability, Fair Value $ 79.4 $ 21.7