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Commitments, Contingencies and Related Parties - Additional Information (Details) $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2019 USD ($) renewal_option	Jun. 28, 2019 USD ($)	Jun. 29, 2018 USD ($)	Jun. 30, 2017 USD ($)
Related Party Transactions [Abstract]
Payments for equity method investments		$ 0	$ 0	$ (20)
Accounts payable to related parties		331	259
Undistributed earnings of Flash Ventures		$ 14	8
Investment funding commitments		50.00%
Costs incurred associated with reduction in utilization		$ 264
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		$ (4,130)	(3,790)
Accounts payable to related parties		$ 331	$ 259
Flash Ventures
Related Party Transactions [Abstract]
Equity method investment, ownership percentage		49.90%
Unis Venture
Related Party Transactions [Abstract]
Equity method investment, ownership percentage		49.00%
Toshiba Memory Corporation | Flash Ventures
Related Party Transactions [Abstract]
Partner's ownership in venture business		50.10%
Unissoft (Wuxi) Group Co Ltd. | Unis Venture
Related Party Transactions [Abstract]
Partner's ownership in venture business		51.00%
Sale Leaseback of California Manufacturing Facility
Related Party Transactions [Abstract]
Proceeds from sale leaseback transaction	$ 115
Loss on sale leaseback transaction	$ 25
Term of contract	15 years
Lease payment due in first year	$ 7
Annual increase of lease payment, percent	3.00%
Number of renewal options | renewal_option	4
Renewal term	5 years
Sale Leaseback of California Manufacturing Facility | Maximum
Related Party Transactions [Abstract]
Renewal term	20 years
Unexpected Power Outage
Related Party Transactions [Abstract]
Charges related to power outage		$ 145
Prepayments Of Future Depreciation | Flash Ventures
Related Party Transactions [Abstract]
Prepayment of future depreciation		358
Prepayment of future depreciation in fiscal year 2020		156
Prepayment of future depreciation in fiscal year 2021		124
Prepayment of future depreciation in fiscal year 2022		$ 78

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