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Related Parties and Related Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Jul. 02, 2021 USD ($) entity	Jul. 03, 2020 USD ($)	Jun. 28, 2019 USD ($)
Related Party Transactions [Abstract]
Number of legal entities | entity	3
Accounts payable to related parties	$ 398	$ 407
Undistributed earnings	$ 33	24
Investment funding commitments	50.00%
Percent of total manufacturing capacity in operation	100.00%
Costs incurred associated with reduction in utilization			$ 264
Costs incurred with unexpected power outage incident	$ (75)	68	145
Western Digital Corp | Minimum
Related Party Transactions [Abstract]
Investment funding commitments	49.90%
Western Digital Corp | Maximum
Related Party Transactions [Abstract]
Investment funding commitments	50.00%
Equity Method Investee
Related Party Transactions [Abstract]
Payments for equity method investments	$ 4,360	3,090	$ 4,130
Accounts payable to related parties	$ 398	$ 407
Flash Ventures
Related Party Transactions [Abstract]
Equity method investment, ownership percentage	49.90%
Remaining committed prepayments	$ 77
Unis Venture
Related Party Transactions [Abstract]
Equity method investment, ownership percentage	49.00%
Kioxia
Related Party Transactions [Abstract]
Equity method investment, ownership percentage	49.90%
Unissoft (Wuxi) Group Co Ltd. | Unis Venture
Related Party Transactions [Abstract]
Partner's ownership in venture business	51.00%
Kioxia | Flash Ventures
Related Party Transactions [Abstract]
Equity method investment, ownership percentage	50.10%
Prepayments of Future Depreciation | Flash Ventures
Related Party Transactions [Abstract]
Other commitment	$ 360
Other commitment, period	3 years
Revenue from Contract with Customer | Unis Venture | Product Concentration Risk
Related Party Transactions [Abstract]
Concentration risk, percentage	3.00%	1.00%	1.00%
Accounts Receivable Benchmark | Unis Venture | Product Concentration Risk
Related Party Transactions [Abstract]
Concentration risk, percentage	5.00%	4.00%

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Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

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Costs Associated With Underutilized Capacity As A Result Of A Temporary Abnormal Reduction In Production

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Percent of commitment by the Company to fund a venture's investment in situations where the venture's sales are insufficient to cover the investments.

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Partner's Ownership In Venture Business

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