v3.26.1
Cover - USD ($)
$ in Billions
 12 Months Ended
Jul. 03, 2026
Jul. 31, 2026
Dec. 27, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jul. 03, 2026    
Document Transition Report false    
Entity File Number 001-31560    
Entity Incorporation, State or Country Code L2    
Entity Tax Identification Number 98-1597419    
Entity Address, Address Line One 121 Woodlands Avenue 5    
Entity Address, City or Town Singapore    
Entity Address, Country SG    
Entity Address, Postal Zip Code 739009    
City Area Code 65    
Local Phone Number 6018-2562    
Title of 12(b) Security Ordinary Shares, par value $0.00001 per share    
Trading Symbol STX    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 65.0
Entity Common Stock, Shares Outstanding   226,644,518  
Documents Incorporated by Reference
Portions of the definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A relating to the registrant’s Annual General Meeting of Shareholders, to be held on October 24, 2026, will be incorporated by reference in this Form 10-K in response to Items 10, 11, 12, 13 and 14 of Part III. The definitive proxy statement will be filed with the SEC no later than 120 days after the registrant's fiscal year ended July 3, 2026.
    
Entity Registrant Name Seagate Technology Holdings plc    
Entity Central Index Key 0001137789    
Amendment Flag false    
Current Fiscal Year End Date --07-03    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY