XML 12 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Cover page - shares
 9 Months Ended
Apr. 02, 2021
Apr. 26, 2021
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Apr. 02, 2021  
Document Transition Report false  
Entity File Number 001-31560  
Entity Incorporation, State or Country Code L2  
Entity Tax Identification Number 98-0648577  
Entity Address, Address Line One 38/39 Fitzwilliam Square  
Entity Address, City or Town Dublin 2  
Entity Address, Country IE  
Entity Address, Postal Zip Code D02 NX53  
City Area Code (353) (1)  
Local Phone Number 234-3136  
Title of 12(b) Security Ordinary Shares, par value $0.00001 per share  
Trading Symbol STX  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Smaller Reporting Company false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   228,873,365
Entity Registrant Name Seagate Technology plc  
Entity Central Index Key 0001137789  
Amendment Flag false  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --07-02