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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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