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Subsequent Events - Additional Information (Detail)
 12 Months Ended
Jul. 25, 2017
USD ($)
shares
Jun. 26, 2017
USD ($)
shares
Jun. 20, 2017
USD ($)
Day
$ / shares
shares
Jun. 11, 2017
USD ($)
Jun. 26, 2016
USD ($)
Jun. 24, 2017
USD ($)
shares
Jul. 31, 2017
USD ($)
Apr. 06, 2017
USD ($)
Jun. 25, 2016
USD ($)
shares
Oct. 20, 2015
USD ($)
Sep. 30, 2014
USD ($)
Subsequent Event [Line Items]                      
Number of shares of common stock purchased | shares           60,579,911     59,532,148    
Purchase of common stock, value           $ 100,000     $ 100,000    
Credit Agreement [Member] | Revolving Credit Facility [Member]                      
Subsequent Event [Line Items]                      
Line of credit facility amount               $ 450,000,000   $ 250,000,000 $ 150,000,000
Purchase Agreement [Member] | 0.50% Convertible Senior Notes due 2022 [Member] | Wells Fargo Securities, LLC [Member]                      
Subsequent Event [Line Items]                      
Debt instrument aggregate principal amount     $ 500,000,000                
Debt instrument additional aggregate principal amount     $ 25,000,000                
Option to purchase additional principal amount of notes granted to initial purchasers, period     30 days                
Net proceeds from issuance of convertiable debt         $ 514,500,000            
Debt Instrument offering completed date     Jun. 26, 2016                
Interest rates on borrowings     0.50%                
Debt instrument maturity date           Jun. 15, 2022          
Conversion of notes in multiples of principal amounts     $ 1,000                
Convertible number of shares, principal amount of notes | shares     13.6947                
Initial conversion price per share of common stock | $ / shares     $ 73.02                
Note repurchase price, percentage of principal amount of notes     100.00%                
Sale price of common stock, minimum threshold percentage     130.00%                
Sale of common stock, threshold trading days | Day     20                
Sale of common stock, threshold consecutive trading days | Day     30                
Subsequent Event [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]                      
Subsequent Event [Line Items]                      
Line of credit facility amount             $ 250,000,000        
Subsequent Event [Member] | Purchase Agreement [Member] | 0.50% Convertible Senior Notes due 2022 [Member] | Wells Fargo Securities, LLC [Member]                      
Subsequent Event [Line Items]                      
Proceeds from the notes to pay balance due on revolving credit facility under credit agreement and term loan, plus interest due   $ 220,000,000                  
Number of shares of common stock purchased | shares   1,698,400                  
Purchase of common stock, value   $ 93,600,000                  
Conexant Systems, LLC [Member]                      
Subsequent Event [Line Items]                      
Acquisition agreement date           Jun. 11, 2017          
Acquisition closing effective date           Jul. 25, 2017          
Conexant Systems, LLC [Member] | Subsequent Event [Member]                      
Subsequent Event [Line Items]                      
Acquired outstanding common and preferred shares and voting interest 100.00%                    
Purchase price of acquisition $ 305,800,000                    
Issuance of common stock for acquisition, shares | shares 726,666                    
Purchase price held in escrow $ 16,800,000                    
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member]                      
Subsequent Event [Line Items]                      
Acquisition agreement date           Jun. 11, 2017          
Purchase price of acquisition       $ 95,000,000              
Expected acquisition closing effective date           first quarter of fiscal 2018