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Fair Value Measurements (Details 1) - USD ($)
$ in Millions
Mar. 31, 2018
Apr. 01, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Line of Credit, Carrying Value $ 10.1 $ 0.0
2.125% Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior Notes, Carrying Value 298.1 298.1
2.625% Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior Notes, Carrying Value 288.0 290.1
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Line of Credit Facility, Fair Value of Amount Outstanding 10.1 0.0
Fair Value, Inputs, Level 2 [Member] | 2.125% Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior Notes, Fair Value 299.4 302.2
Fair Value, Inputs, Level 2 [Member] | 2.625% Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior Notes, Fair Value $ 298.7 $ 302.8