Fair Value Measurements (Details) - USD ($)
$ in Thousands
 6 Months Ended 9 Months Ended
Dec. 24, 2016
Mar. 25, 2017
Mar. 26, 2016
Jun. 25, 2016
Jun. 27, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Proceeds from sale of available-for-sale securities   $ 50,994 $ 0    
Cash and cash equivalents   1,656,727 $ 1,710,340 $ 2,105,229 $ 1,550,965
Available-for-sale Securities   499,154   125,439  
Fair Value, Measurements, Nonrecurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis $ 0        
Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0      
Total Assets   1,633,312   1,824,455  
Total Liabilities   115   1,327  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total Assets   1,133,416   1,658,321  
Total Liabilities   0   0  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total Assets   499,896   166,134  
Total Liabilities   115   1,327  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total Assets   0   0  
Total Liabilities   0   0  
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash and cash equivalents [1]   1,133,416   1,658,321  
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash and cash equivalents [1]   1,133,416   1,658,321  
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash and cash equivalents [1]   0   0  
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash and cash equivalents [1]   0   0  
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Available-for-sale Securities [2]   499,154   125,439  
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Available-for-sale Securities [2]   0   0  
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Available-for-sale Securities [2]   499,154   125,439  
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Available-for-sale Securities [2]   0   0  
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts [3]   742   695  
Foreign currency forward contracts [4]   115   1,327  
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts [3]   0   0  
Foreign currency forward contracts [4]   0   0  
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts [3]   742   695  
Foreign currency forward contracts [4]   115   1,327  
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts [3]   0   0  
Foreign currency forward contracts [4]   0   0  
Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts       70  
Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   0  
Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   70  
Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   0  
Common Stock [Member] | Fair Value, Measurements, Recurring [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   40,000  
Common Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   0  
Common Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   0   40,000  
Common Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Foreign currency forward contracts   $ 0   $ 0  
[1] Included in Cash and cash equivalents in the accompanying Condensed Consolidated Balance Sheets.
[2] Included in Short-term investments in the accompanying Condensed Consolidated Balance Sheets.
[3] Included in Other current assets in the accompanying Condensed Consolidated Balance Sheets.
[4] Included in Accrued expenses in the accompanying Condensed Consolidated Balance Sheets.