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Supplemental Financial Statement Data - Schedule of Current Portion of the Warranty Accrual (Details) - USD ($) $ in Millions | Dec. 27, 2024 | Jun. 28, 2024 | Dec. 29, 2023 | Jun. 30, 2023 | Jul. 01, 2022 | Jul. 02, 2021
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Warranty accrual: |  |  |  |  |  |
Current portion | $ 22 | $ 27 |  |  |  |
Long-term portion | 22 | 21 |  |  |  |
Total warranty accrual | 44 | 48 | $ 43 | $ 42 |  |
The Flash Business of Western Digital Corporation [Member] |  |  |  |  |  |
Warranty accrual: |  |  |  |  |  |
Current portion |  | 27 |  | 23 |  |
Long-term portion |  | 21 |  | 19 |  |
Total warranty accrual |  | 48 |  | $ 42 | $ 52 | $ 48
Sandisk Corporation [Member] |  |  |  |  |  |
Warranty accrual: |  |  |  |  |  |
Total warranty accrual | $ 44 | $ 48 |  |  |  |

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