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Related Parties and Related Commitments and Contingencies - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 29, 2023 USD ($) entity	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)
Guarantor Obligations [Line Items]
Number of legal entities \| entity	3
Investment funding commitments, percentage	50.00%
Percent of total manufacturing capacity in operation	100.00%
Costs incurred associated with reduction in utilization	$ 141	$ 0
Accounts Receivable Benchmark \| Product Concentration Risk \| Unis Venture
Guarantor Obligations [Line Items]
Concentration risk, percentage	7.00%		8.00%
Unis Venture
Guarantor Obligations [Line Items]
Equity method investment, ownership percentage	49.00%
Unis Venture \| Revenue from Contract with Customer \| Product Concentration Risk
Guarantor Obligations [Line Items]
Concentration risk, percentage	6.00%	3.00%
Unis Venture \| Unissoft (Wuxi) Group Co Ltd.
Guarantor Obligations [Line Items]
Partner's ownership in venture business	51.00%
Kioxia Corporation \| Prepayments Of Future Depreciation
Guarantor Obligations [Line Items]
Other commitment	$ 539
Western Digital Corp \| Minimum
Guarantor Obligations [Line Items]
Investment funding commitments, percentage	49.90%
Western Digital Corp \| Maximum
Guarantor Obligations [Line Items]
Investment funding commitments, percentage	50.00%
Equity Method Investee
Guarantor Obligations [Line Items]
Payments for equity method investments	$ 900	$ 1,000
Accounts payable	$ 277		$ 292