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Commitments and Contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Mar. 31, 2018
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Rent expense $ 18.4 $ 12.7 $ 11.5
Rental income 1.3 $ 0.2 $ 0.3
Foundry Commitments      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Non-cancelable purchase commitments 131.9    
Assembly Purchase Order Commitments      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Non-cancelable purchase commitments 4.0    
Outside Test Services Commitments      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Non-cancelable purchase commitments 15.0    
Long-term Other Purchase Obligation      
Purchase Commitment, Excluding Long-term Commitment [Line Items]      
Non-cancelable purchase commitments $ 21.6