Related Parties and Related Commitments and Contingencies - Combined Consolidated Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 03, 2026	Mar. 28, 2025	Apr. 03, 2026	Mar. 28, 2025
Related Party Transaction [Line Items]
Interest income on notes due from Western Digital Corporation	$ (12)	$ (6)	$ (40)	$ (11)
Interest expense on notes due to Western Digital Corporation	6	16	71	22
Research and development	337	285	980	847
Selling, general and administrative	161	139	479	411
Business separation costs	7	9	25	50
Employee termination and other	0	0	(2)	5
Total allocation of Corporate Expenses	551	2,263	1,538	3,109
Related Party
Related Party Transaction [Line Items]
Interest income on notes due from Western Digital Corporation	0	0	0	(1)
Interest expense on notes due to Western Digital Corporation	0	3	0	7
Research and development	0	0	0	189
Selling, general and administrative	0	10	0	158
Business separation costs	0	9	0	50
Employee termination and other	0	0	0	5
Total allocation of Corporate Expenses	$ 0	$ 19	$ 0	$ 402