Related Parties and Related Commitments and Contingencies - Net Transfer From (to) Parent (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 03, 2025	Sep. 27, 2024
Related Party Transaction [Line Items]
Net transfers from Western Digital Corporation per Condensed Consolidated Statements of Shareholders’ Equity		$ 583
Other assets and liabilities, net transferred from Western Digital Corporation	$ 0	6
Property, plant and equipment, net transferred from Western Digital Corporation	0	3
Tax balances transferred from Western Digital Corporation	0	7
Related Party
Related Party Transaction [Line Items]
Net transfers from Western Digital Corporation per Condensed Consolidated Statements of Shareholders’ Equity	0	583
Notes due to Western Digital Corporation	0	(378)
Other assets and liabilities, net transferred from Western Digital Corporation	0	(6)
Property, plant and equipment, net transferred from Western Digital Corporation	0	(3)
Tax balances transferred from Western Digital Corporation	0	(7)
Net transfers to Western Digital Corporation per Condensed Consolidated Statements of Cash Flows	$ 0	$ 189