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Balance Sheet Components - Inventories (Details) - USD ($)
$ in Millions
Jul. 27, 2019
Apr. 27, 2019
Inventory, Net [Abstract]    
Raw Materials $ 80.3 $ 67.1
Work in Process 10.0 9.4
Finished Products 31.7 40.2
Total Inventories $ 122.0 $ 116.7