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Additional Financial Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Mar. 31, 2018
Apr. 01, 2017
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]            
Cash and Cash Equivalents $ 553.1   $ 553.1   $ 1,304.6  
Restricted cash, current 11.5   11.5   15.5  
Restricted cash, noncurrent 31.9   31.9   35.4  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 596.5 $ 1,158.9 596.5 $ 1,158.9 $ 1,355.5 $ 711.8
Cash Interest and Taxes            
Cash paid for interest 5.1 3.0 8.1 5.6    
Cash paid for income taxes $ 27.3 $ 7.5 30.6 28.3    
Additional Financial Information (Textual) [Abstract]            
Capital expenditures incurred but not yet paid     $ 41.2 37.5    
Capital lease asset recognized       2.3    
Capital Lease Obligations Incurred       $ 2.3