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Income Tax Expense - Additional Information (Details) - USD ($) $ in Millions | Dec. 27, 2024 | Jun. 28, 2024 | Jun. 27, 2024 | Jun. 30, 2023 | Jul. 01, 2022 | Jul. 02, 2021
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Income Tax Expense [Line Items] |  |  |  |  |  |
Unrecognized tax benefits | $ 60 | $ 47 | $ 47 |  |  |
Penalties and interest accrued on unrecognized tax benefits | $ 6 | 9 |  |  |  |
The Flash Business of Western Digital Corporation [Member] |  |  |  |  |  |
Income Tax Expense [Line Items] |  |  |  |  |  |
Unrecognized tax benefits |  | 47 |  | $ 25 | $ 17 | $ 11
Penalties and interest accrued on unrecognized tax benefits |  | 9 |  | 5 | 5 |
NOL Carryforward Amount |  | 0 |  |  |  |
The Flash Business of Western Digital Corporation [Member] | Business Payables [Member] |  |  |  |  |  |
Income Tax Expense [Line Items] |  |  |  |  |  |
Penalties and interest accrued on unrecognized tax benefits |  | $ 56 |  | $ 30 | $ 22 |

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