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Financial Instruments (Details Textual 1) - USD ($)
$ in Millions
Sep. 29, 2018
Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Non-current investments $ 69.9 $ 86.2
Bank Time Deposits [Member]    
Debt Securities, Available-for-sale [Line Items]    
Short-term Investments 1,053.0 480.2
Non-current investments 69.9 86.2
Commercial Paper [Member]    
Debt Securities, Available-for-sale [Line Items]    
Short-term Investments $ 267.0 $ 219.2